./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe009_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.2024-05-21_14-57-05.files/protection/safe009_power.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 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/safe009_power.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe009_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-76401ed-m [2024-06-20 16:54:55,986 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 16:54:56,050 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 16:54:56,054 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 16:54:56,057 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 16:54:56,080 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 16:54:56,081 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 16:54:56,082 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 16:54:56,082 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 16:54:56,086 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 16:54:56,086 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 16:54:56,087 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 16:54:56,088 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 16:54:56,089 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 16:54:56,089 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 16:54:56,090 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 16:54:56,090 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 16:54:56,090 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 16:54:56,090 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 16:54:56,092 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 16:54:56,092 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 16:54:56,092 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 16:54:56,092 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 16:54:56,093 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 16:54:56,093 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 16:54:56,093 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 16:54:56,094 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 16:54:56,094 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 16:54:56,094 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 16:54:56,095 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 16:54:56,096 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 16:54:56,096 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 16:54:56,096 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:54:56,096 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 16:54:56,097 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 16:54:56,097 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 16:54:56,097 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 16:54:56,097 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 16:54:56,097 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 16:54:56,098 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 16:54:56,098 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 16:54:56,098 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 16:54:56,098 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 16:54:56,098 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 16:54:56,341 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 16:54:56,366 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 16:54:56,368 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 16:54:56,369 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 16:54:56,372 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 16:54:56,373 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe009_power.opt.i [2024-06-20 16:54:57,529 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 16:54:57,782 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 16:54:57,783 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe009_power.opt.i [2024-06-20 16:54:57,795 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfeb9fb4c/a1d292ee506a4638947977eeeaca74a8/FLAG5a5c2baa0 [2024-06-20 16:54:57,809 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfeb9fb4c/a1d292ee506a4638947977eeeaca74a8 [2024-06-20 16:54:57,811 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 16:54:57,811 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 16:54:57,812 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe009_power.opt.yml/witness.yml [2024-06-20 16:54:58,035 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 16:54:58,036 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 16:54:58,037 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 16:54:58,037 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 16:54:58,042 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 16:54:58,043 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:54:57" (1/2) ... [2024-06-20 16:54:58,044 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@671f106f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:54:58, skipping insertion in model container [2024-06-20 16:54:58,044 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:54:57" (1/2) ... [2024-06-20 16:54:58,046 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4ca1fbc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:54:58, skipping insertion in model container [2024-06-20 16:54:58,047 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:54:58" (2/2) ... [2024-06-20 16:54:58,047 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@671f106f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:54:58, skipping insertion in model container [2024-06-20 16:54:58,048 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:54:58" (2/2) ... [2024-06-20 16:54:58,048 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 16:54:58,173 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 16:54:58,174 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] (((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd3 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p1_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p1_EAX$read_delayed_var && *__unbuffered_p1_EAX$read_delayed_var <= 1) && __unbuffered_p1_EAX$read_delayed_var == & x) && (*__unbuffered_p1_EAX$read_delayed_var == 0 || *__unbuffered_p1_EAX$read_delayed_var == 1))))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0 == 0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) [2024-06-20 16:54:58,174 INFO L97 edCorrectnessWitness]: Location invariant before [L851-L851] (((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd3 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p1_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p1_EAX$read_delayed_var && *__unbuffered_p1_EAX$read_delayed_var <= 1) && __unbuffered_p1_EAX$read_delayed_var == & x) && (*__unbuffered_p1_EAX$read_delayed_var == 0 || *__unbuffered_p1_EAX$read_delayed_var == 1))))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0 == 0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) [2024-06-20 16:54:58,175 INFO L97 edCorrectnessWitness]: Location invariant before [L853-L853] (((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd3 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p1_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p1_EAX$read_delayed_var && *__unbuffered_p1_EAX$read_delayed_var <= 1) && __unbuffered_p1_EAX$read_delayed_var == & x) && (*__unbuffered_p1_EAX$read_delayed_var == 0 || *__unbuffered_p1_EAX$read_delayed_var == 1))))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0 == 0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) [2024-06-20 16:54:58,175 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 16:54:58,175 INFO L106 edCorrectnessWitness]: ghost_update [L849-L849] multithreaded = 1; [2024-06-20 16:54:58,220 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 16:54:58,647 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:54:58,656 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 16:54:58,853 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:54:58,898 INFO L206 MainTranslator]: Completed translation [2024-06-20 16:54:58,899 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:54:58 WrapperNode [2024-06-20 16:54:58,899 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 16:54:58,900 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 16:54:58,900 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 16:54:58,900 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 16:54:58,907 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 20.06 04:54:58" (1/1) ... [2024-06-20 16:54:58,927 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 20.06 04:54:58" (1/1) ... [2024-06-20 16:54:58,965 INFO L138 Inliner]: procedures = 175, calls = 84, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 253 [2024-06-20 16:54:58,965 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 16:54:58,966 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 16:54:58,966 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 16:54:58,966 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 16:54:58,977 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:54:58" (1/1) ... [2024-06-20 16:54:58,977 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:54:58" (1/1) ... [2024-06-20 16:54:58,982 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:54:58" (1/1) ... [2024-06-20 16:54:59,010 INFO L175 MemorySlicer]: Split 44 memory accesses to 2 slices as follows [42, 2]. 95 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [1, 2]. The 6 writes are split as follows [6, 0]. [2024-06-20 16:54:59,011 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:54:58" (1/1) ... [2024-06-20 16:54:59,011 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:54:58" (1/1) ... [2024-06-20 16:54:59,024 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:54:58" (1/1) ... [2024-06-20 16:54:59,027 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:54:58" (1/1) ... [2024-06-20 16:54:59,030 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:54:58" (1/1) ... [2024-06-20 16:54:59,033 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:54:58" (1/1) ... [2024-06-20 16:54:59,052 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 16:54:59,053 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 16:54:59,053 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 16:54:59,053 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 16:54:59,054 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:54:58" (1/1) ... [2024-06-20 16:54:59,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:54:59,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 16:54:59,094 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) [2024-06-20 16:54:59,119 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 [2024-06-20 16:54:59,137 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-20 16:54:59,137 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-20 16:54:59,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-20 16:54:59,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-20 16:54:59,138 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 16:54:59,138 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 16:54:59,138 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 16:54:59,139 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 16:54:59,139 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 16:54:59,139 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 16:54:59,139 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 16:54:59,139 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 16:54:59,139 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 16:54:59,139 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-20 16:54:59,139 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 16:54:59,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 16:54:59,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 16:54:59,141 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 16:54:59,279 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 16:54:59,281 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 16:54:59,912 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 16:54:59,912 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 16:55:00,419 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 16:55:00,420 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 16:55:00,421 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:55:00 BoogieIcfgContainer [2024-06-20 16:55:00,421 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 16:55:00,423 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 16:55:00,423 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 16:55:00,426 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 16:55:00,427 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 04:54:57" (1/4) ... [2024-06-20 16:55:00,427 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a9e5a52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 04:55:00, skipping insertion in model container [2024-06-20 16:55:00,427 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:54:58" (2/4) ... [2024-06-20 16:55:00,428 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a9e5a52 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:55:00, skipping insertion in model container [2024-06-20 16:55:00,428 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:54:58" (3/4) ... [2024-06-20 16:55:00,428 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a9e5a52 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:55:00, skipping insertion in model container [2024-06-20 16:55:00,428 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:55:00" (4/4) ... [2024-06-20 16:55:00,429 INFO L112 eAbstractionObserver]: Analyzing ICFG safe009_power.opt.i [2024-06-20 16:55:00,447 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 16:55:00,447 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-20 16:55:00,447 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 16:55:00,554 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 16:55:00,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-20 16:55:00,618 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-20 16:55:00,619 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:55:00,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 53 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 16:55:00,621 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-20 16:55:00,623 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-20 16:55:00,661 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 16:55:00,685 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;@5cfe8e5c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 16:55:00,686 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-20 16:55:00,692 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 16:55:00,692 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 16:55:00,692 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:55:00,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:55:00,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 16:55:00,694 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:55:00,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:55:00,711 INFO L85 PathProgramCache]: Analyzing trace with hash 845599057, now seen corresponding path program 1 times [2024-06-20 16:55:00,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:55:00,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409318566] [2024-06-20 16:55:00,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:55:00,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:55:00,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:55:03,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:55:03,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:55:03,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409318566] [2024-06-20 16:55:03,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409318566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:55:03,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:55:03,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 16:55:03,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213078993] [2024-06-20 16:55:03,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:55:03,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 16:55:03,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:55:03,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 16:55:03,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 16:55:03,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-20 16:55:03,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:03,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:55:03,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-20 16:55:03,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:55:03,944 INFO L124 PetriNetUnfolderBase]: 1205/1833 cut-off events. [2024-06-20 16:55:03,944 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-20 16:55:03,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3738 conditions, 1833 events. 1205/1833 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 8339 event pairs, 800 based on Foata normal form. 1/1797 useless extension candidates. Maximal degree in co-relation 3726. Up to 1818 conditions per place. [2024-06-20 16:55:03,963 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 35 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-20 16:55:03,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 44 transitions, 181 flow [2024-06-20 16:55:03,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 16:55:03,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 16:55:03,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 66 transitions. [2024-06-20 16:55:03,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-20 16:55:03,977 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 66 transitions. [2024-06-20 16:55:03,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 44 transitions, 181 flow [2024-06-20 16:55:03,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 44 transitions, 176 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 16:55:03,983 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-20 16:55:03,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-20 16:55:03,988 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-20 16:55:03,988 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-20 16:55:03,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:03,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:55:03,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:55:03,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 16:55:03,990 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:55:03,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:55:03,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1284884533, now seen corresponding path program 1 times [2024-06-20 16:55:03,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:55:03,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547498498] [2024-06-20 16:55:03,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:55:03,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:55:04,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:55:06,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:55:06,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:55:06,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547498498] [2024-06-20 16:55:06,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547498498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:55:06,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:55:06,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 16:55:06,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883975908] [2024-06-20 16:55:06,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:55:06,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 16:55:06,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:55:06,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 16:55:06,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-20 16:55:06,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 16:55:06,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:06,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:55:06,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 16:55:06,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:55:07,166 INFO L124 PetriNetUnfolderBase]: 1460/2208 cut-off events. [2024-06-20 16:55:07,167 INFO L125 PetriNetUnfolderBase]: For 387/393 co-relation queries the response was YES. [2024-06-20 16:55:07,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5081 conditions, 2208 events. 1460/2208 cut-off events. For 387/393 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9918 event pairs, 758 based on Foata normal form. 7/2210 useless extension candidates. Maximal degree in co-relation 5069. Up to 2154 conditions per place. [2024-06-20 16:55:07,184 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 46 selfloop transitions, 7 changer transitions 0/57 dead transitions. [2024-06-20 16:55:07,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 57 transitions, 262 flow [2024-06-20 16:55:07,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 16:55:07,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 16:55:07,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 84 transitions. [2024-06-20 16:55:07,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-20 16:55:07,191 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 84 transitions. [2024-06-20 16:55:07,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 57 transitions, 262 flow [2024-06-20 16:55:07,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 57 transitions, 258 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 16:55:07,195 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 136 flow [2024-06-20 16:55:07,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-20 16:55:07,198 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-06-20 16:55:07,198 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 136 flow [2024-06-20 16:55:07,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:07,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:55:07,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:55:07,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 16:55:07,203 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:55:07,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:55:07,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1176716593, now seen corresponding path program 1 times [2024-06-20 16:55:07,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:55:07,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891189069] [2024-06-20 16:55:07,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:55:07,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:55:07,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:55:10,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:55:10,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:55:10,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891189069] [2024-06-20 16:55:10,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891189069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:55:10,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:55:10,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:55:10,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975221527] [2024-06-20 16:55:10,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:55:10,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:55:10,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:55:10,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:55:10,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:55:10,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 16:55:10,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 136 flow. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:10,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:55:10,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 16:55:10,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:55:11,216 INFO L124 PetriNetUnfolderBase]: 1454/2199 cut-off events. [2024-06-20 16:55:11,216 INFO L125 PetriNetUnfolderBase]: For 1112/1124 co-relation queries the response was YES. [2024-06-20 16:55:11,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5609 conditions, 2199 events. 1454/2199 cut-off events. For 1112/1124 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9869 event pairs, 628 based on Foata normal form. 11/2205 useless extension candidates. Maximal degree in co-relation 5595. Up to 2126 conditions per place. [2024-06-20 16:55:11,230 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 55 selfloop transitions, 10 changer transitions 0/69 dead transitions. [2024-06-20 16:55:11,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 69 transitions, 348 flow [2024-06-20 16:55:11,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:55:11,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:55:11,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 103 transitions. [2024-06-20 16:55:11,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5024390243902439 [2024-06-20 16:55:11,235 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 136 flow. Second operand 5 states and 103 transitions. [2024-06-20 16:55:11,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 69 transitions, 348 flow [2024-06-20 16:55:11,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 69 transitions, 334 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-20 16:55:11,239 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 172 flow [2024-06-20 16:55:11,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=172, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-06-20 16:55:11,241 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 6 predicate places. [2024-06-20 16:55:11,241 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 172 flow [2024-06-20 16:55:11,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:11,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:55:11,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:55:11,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 16:55:11,242 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:55:11,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:55:11,243 INFO L85 PathProgramCache]: Analyzing trace with hash 2118477780, now seen corresponding path program 1 times [2024-06-20 16:55:11,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:55:11,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281744449] [2024-06-20 16:55:11,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:55:11,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:55:11,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:55:14,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:55:14,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:55:14,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281744449] [2024-06-20 16:55:14,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281744449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:55:14,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:55:14,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:55:14,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239381681] [2024-06-20 16:55:14,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:55:14,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:55:14,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:55:14,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:55:14,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:55:14,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 16:55:14,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 172 flow. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:14,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:55:14,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 16:55:14,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:55:15,463 INFO L124 PetriNetUnfolderBase]: 1445/2184 cut-off events. [2024-06-20 16:55:15,464 INFO L125 PetriNetUnfolderBase]: For 2022/2034 co-relation queries the response was YES. [2024-06-20 16:55:15,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6088 conditions, 2184 events. 1445/2184 cut-off events. For 2022/2034 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9770 event pairs, 483 based on Foata normal form. 14/2193 useless extension candidates. Maximal degree in co-relation 6073. Up to 2073 conditions per place. [2024-06-20 16:55:15,480 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 60 selfloop transitions, 12 changer transitions 0/76 dead transitions. [2024-06-20 16:55:15,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 76 transitions, 406 flow [2024-06-20 16:55:15,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:55:15,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:55:15,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-06-20 16:55:15,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-20 16:55:15,485 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 172 flow. Second operand 6 states and 117 transitions. [2024-06-20 16:55:15,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 76 transitions, 406 flow [2024-06-20 16:55:15,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 76 transitions, 382 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-20 16:55:15,492 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 191 flow [2024-06-20 16:55:15,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=191, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2024-06-20 16:55:15,494 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2024-06-20 16:55:15,494 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 191 flow [2024-06-20 16:55:15,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:15,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:55:15,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:55:15,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 16:55:15,495 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:55:15,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:55:15,496 INFO L85 PathProgramCache]: Analyzing trace with hash 595435315, now seen corresponding path program 1 times [2024-06-20 16:55:15,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:55:15,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413884970] [2024-06-20 16:55:15,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:55:15,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:55:15,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:55:17,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:55:17,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:55:17,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413884970] [2024-06-20 16:55:17,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413884970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:55:17,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:55:17,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:55:17,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068917835] [2024-06-20 16:55:17,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:55:17,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:55:17,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:55:17,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:55:17,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:55:17,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-20 16:55:17,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 191 flow. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:17,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:55:17,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-20 16:55:17,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:55:18,699 INFO L124 PetriNetUnfolderBase]: 1179/1793 cut-off events. [2024-06-20 16:55:18,699 INFO L125 PetriNetUnfolderBase]: For 2640/2640 co-relation queries the response was YES. [2024-06-20 16:55:18,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5413 conditions, 1793 events. 1179/1793 cut-off events. For 2640/2640 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 8095 event pairs, 492 based on Foata normal form. 2/1791 useless extension candidates. Maximal degree in co-relation 5396. Up to 1767 conditions per place. [2024-06-20 16:55:18,712 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 47 selfloop transitions, 8 changer transitions 0/59 dead transitions. [2024-06-20 16:55:18,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 59 transitions, 351 flow [2024-06-20 16:55:18,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:55:18,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:55:18,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2024-06-20 16:55:18,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4097560975609756 [2024-06-20 16:55:18,714 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 191 flow. Second operand 5 states and 84 transitions. [2024-06-20 16:55:18,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 59 transitions, 351 flow [2024-06-20 16:55:18,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 59 transitions, 318 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-20 16:55:18,717 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 204 flow [2024-06-20 16:55:18,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=204, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-06-20 16:55:18,718 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2024-06-20 16:55:18,718 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 204 flow [2024-06-20 16:55:18,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:18,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:55:18,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:55:18,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 16:55:18,719 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:55:18,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:55:18,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1278627620, now seen corresponding path program 1 times [2024-06-20 16:55:18,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:55:18,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870990203] [2024-06-20 16:55:18,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:55:18,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:55:18,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:55:21,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:55:21,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:55:21,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870990203] [2024-06-20 16:55:21,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870990203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:55:21,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:55:21,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:55:21,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141797801] [2024-06-20 16:55:21,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:55:21,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:55:21,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:55:21,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:55:21,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:55:21,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-20 16:55:21,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 204 flow. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:21,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:55:21,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-20 16:55:21,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:55:22,251 INFO L124 PetriNetUnfolderBase]: 1453/2194 cut-off events. [2024-06-20 16:55:22,252 INFO L125 PetriNetUnfolderBase]: For 4349/4349 co-relation queries the response was YES. [2024-06-20 16:55:22,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6896 conditions, 2194 events. 1453/2194 cut-off events. For 4349/4349 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9822 event pairs, 520 based on Foata normal form. 8/2199 useless extension candidates. Maximal degree in co-relation 6877. Up to 2077 conditions per place. [2024-06-20 16:55:22,268 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 68 selfloop transitions, 15 changer transitions 0/86 dead transitions. [2024-06-20 16:55:22,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 86 transitions, 523 flow [2024-06-20 16:55:22,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:55:22,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:55:22,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-20 16:55:22,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-20 16:55:22,271 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 204 flow. Second operand 6 states and 105 transitions. [2024-06-20 16:55:22,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 86 transitions, 523 flow [2024-06-20 16:55:22,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 86 transitions, 488 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-20 16:55:22,277 INFO L231 Difference]: Finished difference. Result has 56 places, 58 transitions, 303 flow [2024-06-20 16:55:22,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=303, PETRI_PLACES=56, PETRI_TRANSITIONS=58} [2024-06-20 16:55:22,280 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 14 predicate places. [2024-06-20 16:55:22,280 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 58 transitions, 303 flow [2024-06-20 16:55:22,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:22,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:55:22,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:55:22,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 16:55:22,281 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:55:22,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:55:22,282 INFO L85 PathProgramCache]: Analyzing trace with hash 223064681, now seen corresponding path program 1 times [2024-06-20 16:55:22,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:55:22,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601881960] [2024-06-20 16:55:22,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:55:22,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:55:22,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:55:25,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:55:25,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:55:25,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601881960] [2024-06-20 16:55:25,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601881960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:55:25,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:55:25,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:55:25,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850695118] [2024-06-20 16:55:25,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:55:25,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:55:25,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:55:25,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:55:25,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:55:25,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-20 16:55:25,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 58 transitions, 303 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:25,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:55:25,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-20 16:55:25,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:55:26,433 INFO L124 PetriNetUnfolderBase]: 1479/2234 cut-off events. [2024-06-20 16:55:26,433 INFO L125 PetriNetUnfolderBase]: For 6323/6335 co-relation queries the response was YES. [2024-06-20 16:55:26,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7955 conditions, 2234 events. 1479/2234 cut-off events. For 6323/6335 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9971 event pairs, 538 based on Foata normal form. 12/2241 useless extension candidates. Maximal degree in co-relation 7933. Up to 2158 conditions per place. [2024-06-20 16:55:26,450 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 71 selfloop transitions, 12 changer transitions 0/86 dead transitions. [2024-06-20 16:55:26,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 86 transitions, 558 flow [2024-06-20 16:55:26,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:55:26,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:55:26,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-20 16:55:26,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-20 16:55:26,453 INFO L175 Difference]: Start difference. First operand has 56 places, 58 transitions, 303 flow. Second operand 6 states and 100 transitions. [2024-06-20 16:55:26,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 86 transitions, 558 flow [2024-06-20 16:55:26,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 86 transitions, 546 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-06-20 16:55:26,460 INFO L231 Difference]: Finished difference. Result has 61 places, 61 transitions, 353 flow [2024-06-20 16:55:26,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=353, PETRI_PLACES=61, PETRI_TRANSITIONS=61} [2024-06-20 16:55:26,462 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 19 predicate places. [2024-06-20 16:55:26,462 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 61 transitions, 353 flow [2024-06-20 16:55:26,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:26,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:55:26,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:55:26,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 16:55:26,463 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:55:26,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:55:26,464 INFO L85 PathProgramCache]: Analyzing trace with hash -574510261, now seen corresponding path program 1 times [2024-06-20 16:55:26,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:55:26,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828216666] [2024-06-20 16:55:26,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:55:26,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:55:26,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:55:28,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:55:28,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:55:28,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828216666] [2024-06-20 16:55:28,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828216666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:55:28,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:55:28,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:55:28,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794160367] [2024-06-20 16:55:28,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:55:28,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:55:28,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:55:28,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:55:28,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:55:28,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-20 16:55:28,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 61 transitions, 353 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:28,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:55:28,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-20 16:55:28,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:55:30,450 INFO L124 PetriNetUnfolderBase]: 1597/2400 cut-off events. [2024-06-20 16:55:30,451 INFO L125 PetriNetUnfolderBase]: For 8642/8654 co-relation queries the response was YES. [2024-06-20 16:55:30,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9110 conditions, 2400 events. 1597/2400 cut-off events. For 8642/8654 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 10841 event pairs, 485 based on Foata normal form. 16/2411 useless extension candidates. Maximal degree in co-relation 9085. Up to 2153 conditions per place. [2024-06-20 16:55:30,467 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 67 selfloop transitions, 32 changer transitions 0/102 dead transitions. [2024-06-20 16:55:30,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 102 transitions, 727 flow [2024-06-20 16:55:30,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:55:30,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:55:30,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-20 16:55:30,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-20 16:55:30,469 INFO L175 Difference]: Start difference. First operand has 61 places, 61 transitions, 353 flow. Second operand 8 states and 128 transitions. [2024-06-20 16:55:30,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 102 transitions, 727 flow [2024-06-20 16:55:30,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 102 transitions, 691 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-20 16:55:30,478 INFO L231 Difference]: Finished difference. Result has 67 places, 74 transitions, 517 flow [2024-06-20 16:55:30,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=517, PETRI_PLACES=67, PETRI_TRANSITIONS=74} [2024-06-20 16:55:30,481 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 25 predicate places. [2024-06-20 16:55:30,481 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 74 transitions, 517 flow [2024-06-20 16:55:30,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:30,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:55:30,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:55:30,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 16:55:30,482 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:55:30,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:55:30,482 INFO L85 PathProgramCache]: Analyzing trace with hash -592385047, now seen corresponding path program 2 times [2024-06-20 16:55:30,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:55:30,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590711352] [2024-06-20 16:55:30,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:55:30,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:55:30,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:55:33,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:55:33,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:55:33,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590711352] [2024-06-20 16:55:33,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590711352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:55:33,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:55:33,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:55:33,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458108757] [2024-06-20 16:55:33,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:55:33,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:55:33,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:55:33,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:55:33,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:55:33,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-20 16:55:33,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 74 transitions, 517 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:33,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:55:33,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-20 16:55:33,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:55:34,102 INFO L124 PetriNetUnfolderBase]: 1592/2393 cut-off events. [2024-06-20 16:55:34,102 INFO L125 PetriNetUnfolderBase]: For 11473/11485 co-relation queries the response was YES. [2024-06-20 16:55:34,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10171 conditions, 2393 events. 1592/2393 cut-off events. For 11473/11485 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 10731 event pairs, 554 based on Foata normal form. 10/2398 useless extension candidates. Maximal degree in co-relation 10143. Up to 2319 conditions per place. [2024-06-20 16:55:34,117 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 80 selfloop transitions, 13 changer transitions 0/96 dead transitions. [2024-06-20 16:55:34,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 96 transitions, 781 flow [2024-06-20 16:55:34,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:55:34,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:55:34,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-20 16:55:34,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-20 16:55:34,120 INFO L175 Difference]: Start difference. First operand has 67 places, 74 transitions, 517 flow. Second operand 6 states and 96 transitions. [2024-06-20 16:55:34,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 96 transitions, 781 flow [2024-06-20 16:55:34,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 96 transitions, 744 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-20 16:55:34,131 INFO L231 Difference]: Finished difference. Result has 70 places, 77 transitions, 552 flow [2024-06-20 16:55:34,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=482, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=552, PETRI_PLACES=70, PETRI_TRANSITIONS=77} [2024-06-20 16:55:34,132 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 28 predicate places. [2024-06-20 16:55:34,132 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 77 transitions, 552 flow [2024-06-20 16:55:34,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:34,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:55:34,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:55:34,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 16:55:34,133 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:55:34,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:55:34,133 INFO L85 PathProgramCache]: Analyzing trace with hash 400553507, now seen corresponding path program 2 times [2024-06-20 16:55:34,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:55:34,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629161112] [2024-06-20 16:55:34,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:55:34,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:55:34,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:55:36,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:55:36,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:55:36,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629161112] [2024-06-20 16:55:36,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629161112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:55:36,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:55:36,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:55:36,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246829074] [2024-06-20 16:55:36,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:55:36,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:55:36,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:55:36,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:55:36,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:55:36,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-20 16:55:36,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 77 transitions, 552 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:36,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:55:36,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-20 16:55:36,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:55:37,869 INFO L124 PetriNetUnfolderBase]: 1642/2463 cut-off events. [2024-06-20 16:55:37,870 INFO L125 PetriNetUnfolderBase]: For 12091/12103 co-relation queries the response was YES. [2024-06-20 16:55:37,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10591 conditions, 2463 events. 1642/2463 cut-off events. For 12091/12103 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 11144 event pairs, 492 based on Foata normal form. 16/2474 useless extension candidates. Maximal degree in co-relation 10561. Up to 2066 conditions per place. [2024-06-20 16:55:37,886 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 80 selfloop transitions, 42 changer transitions 0/125 dead transitions. [2024-06-20 16:55:37,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 125 transitions, 1040 flow [2024-06-20 16:55:37,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:55:37,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:55:37,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-20 16:55:37,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 16:55:37,888 INFO L175 Difference]: Start difference. First operand has 70 places, 77 transitions, 552 flow. Second operand 7 states and 126 transitions. [2024-06-20 16:55:37,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 125 transitions, 1040 flow [2024-06-20 16:55:37,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 125 transitions, 994 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-20 16:55:37,901 INFO L231 Difference]: Finished difference. Result has 75 places, 91 transitions, 763 flow [2024-06-20 16:55:37,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=763, PETRI_PLACES=75, PETRI_TRANSITIONS=91} [2024-06-20 16:55:37,902 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 33 predicate places. [2024-06-20 16:55:37,902 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 91 transitions, 763 flow [2024-06-20 16:55:37,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:37,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:55:37,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:55:37,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 16:55:37,903 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:55:37,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:55:37,903 INFO L85 PathProgramCache]: Analyzing trace with hash 400562435, now seen corresponding path program 1 times [2024-06-20 16:55:37,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:55:37,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298688744] [2024-06-20 16:55:37,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:55:37,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:55:37,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:55:41,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:55:41,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:55:41,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298688744] [2024-06-20 16:55:41,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298688744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:55:41,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:55:41,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:55:41,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344653675] [2024-06-20 16:55:41,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:55:41,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:55:41,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:55:41,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:55:41,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:55:41,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-20 16:55:41,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 91 transitions, 763 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:41,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:55:41,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-20 16:55:41,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:55:42,350 INFO L124 PetriNetUnfolderBase]: 1694/2545 cut-off events. [2024-06-20 16:55:42,351 INFO L125 PetriNetUnfolderBase]: For 16466/16466 co-relation queries the response was YES. [2024-06-20 16:55:42,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11893 conditions, 2545 events. 1694/2545 cut-off events. For 16466/16466 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 11645 event pairs, 499 based on Foata normal form. 16/2558 useless extension candidates. Maximal degree in co-relation 11860. Up to 2334 conditions per place. [2024-06-20 16:55:42,369 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 110 selfloop transitions, 19 changer transitions 0/132 dead transitions. [2024-06-20 16:55:42,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 132 transitions, 1189 flow [2024-06-20 16:55:42,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:55:42,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:55:42,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-20 16:55:42,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-20 16:55:42,371 INFO L175 Difference]: Start difference. First operand has 75 places, 91 transitions, 763 flow. Second operand 7 states and 124 transitions. [2024-06-20 16:55:42,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 132 transitions, 1189 flow [2024-06-20 16:55:42,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 132 transitions, 1139 flow, removed 24 selfloop flow, removed 1 redundant places. [2024-06-20 16:55:42,390 INFO L231 Difference]: Finished difference. Result has 81 places, 93 transitions, 791 flow [2024-06-20 16:55:42,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=717, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=791, PETRI_PLACES=81, PETRI_TRANSITIONS=93} [2024-06-20 16:55:42,391 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 39 predicate places. [2024-06-20 16:55:42,391 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 93 transitions, 791 flow [2024-06-20 16:55:42,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:42,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:55:42,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:55:42,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 16:55:42,392 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:55:42,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:55:42,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1907610507, now seen corresponding path program 1 times [2024-06-20 16:55:42,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:55:42,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863847831] [2024-06-20 16:55:42,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:55:42,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:55:42,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:55:45,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:55:45,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:55:45,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863847831] [2024-06-20 16:55:45,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863847831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:55:45,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:55:45,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:55:45,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366367666] [2024-06-20 16:55:45,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:55:45,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:55:45,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:55:45,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:55:45,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:55:45,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-20 16:55:45,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 93 transitions, 791 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:45,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:55:45,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-20 16:55:45,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:55:47,000 INFO L124 PetriNetUnfolderBase]: 1707/2568 cut-off events. [2024-06-20 16:55:47,000 INFO L125 PetriNetUnfolderBase]: For 17124/17167 co-relation queries the response was YES. [2024-06-20 16:55:47,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11857 conditions, 2568 events. 1707/2568 cut-off events. For 17124/17167 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 11774 event pairs, 581 based on Foata normal form. 27/2588 useless extension candidates. Maximal degree in co-relation 11821. Up to 2430 conditions per place. [2024-06-20 16:55:47,017 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 107 selfloop transitions, 23 changer transitions 0/133 dead transitions. [2024-06-20 16:55:47,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 133 transitions, 1249 flow [2024-06-20 16:55:47,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:55:47,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:55:47,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-20 16:55:47,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-20 16:55:47,020 INFO L175 Difference]: Start difference. First operand has 81 places, 93 transitions, 791 flow. Second operand 7 states and 122 transitions. [2024-06-20 16:55:47,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 133 transitions, 1249 flow [2024-06-20 16:55:47,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 133 transitions, 1197 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-20 16:55:47,039 INFO L231 Difference]: Finished difference. Result has 83 places, 99 transitions, 875 flow [2024-06-20 16:55:47,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=739, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=875, PETRI_PLACES=83, PETRI_TRANSITIONS=99} [2024-06-20 16:55:47,040 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 41 predicate places. [2024-06-20 16:55:47,040 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 99 transitions, 875 flow [2024-06-20 16:55:47,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:47,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:55:47,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:55:47,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 16:55:47,041 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:55:47,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:55:47,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1187784304, now seen corresponding path program 1 times [2024-06-20 16:55:47,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:55:47,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714058177] [2024-06-20 16:55:47,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:55:47,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:55:47,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:55:50,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:55:50,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:55:50,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714058177] [2024-06-20 16:55:50,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714058177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:55:50,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:55:50,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:55:50,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30438355] [2024-06-20 16:55:50,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:55:50,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:55:50,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:55:50,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:55:50,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:55:50,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-20 16:55:50,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 99 transitions, 875 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:50,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:55:50,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-20 16:55:50,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:55:51,658 INFO L124 PetriNetUnfolderBase]: 1909/2852 cut-off events. [2024-06-20 16:55:51,658 INFO L125 PetriNetUnfolderBase]: For 21460/21497 co-relation queries the response was YES. [2024-06-20 16:55:51,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13487 conditions, 2852 events. 1909/2852 cut-off events. For 21460/21497 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 13161 event pairs, 460 based on Foata normal form. 31/2876 useless extension candidates. Maximal degree in co-relation 13450. Up to 2507 conditions per place. [2024-06-20 16:55:51,678 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 137 selfloop transitions, 32 changer transitions 0/172 dead transitions. [2024-06-20 16:55:51,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 172 transitions, 1707 flow [2024-06-20 16:55:51,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:55:51,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:55:51,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-20 16:55:51,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-20 16:55:51,680 INFO L175 Difference]: Start difference. First operand has 83 places, 99 transitions, 875 flow. Second operand 8 states and 148 transitions. [2024-06-20 16:55:51,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 172 transitions, 1707 flow [2024-06-20 16:55:51,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 172 transitions, 1656 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-20 16:55:51,705 INFO L231 Difference]: Finished difference. Result has 91 places, 120 transitions, 1128 flow [2024-06-20 16:55:51,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=824, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1128, PETRI_PLACES=91, PETRI_TRANSITIONS=120} [2024-06-20 16:55:51,706 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 49 predicate places. [2024-06-20 16:55:51,706 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 120 transitions, 1128 flow [2024-06-20 16:55:51,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:51,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:55:51,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:55:51,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 16:55:51,707 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:55:51,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:55:51,707 INFO L85 PathProgramCache]: Analyzing trace with hash -611184304, now seen corresponding path program 2 times [2024-06-20 16:55:51,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:55:51,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636429527] [2024-06-20 16:55:51,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:55:51,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:55:51,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:55:54,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:55:54,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:55:54,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636429527] [2024-06-20 16:55:54,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636429527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:55:54,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:55:54,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:55:54,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766581091] [2024-06-20 16:55:54,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:55:54,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:55:54,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:55:54,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:55:54,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:55:54,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-20 16:55:54,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 120 transitions, 1128 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:54,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:55:54,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-20 16:55:54,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:55:55,494 INFO L124 PetriNetUnfolderBase]: 1963/2928 cut-off events. [2024-06-20 16:55:55,494 INFO L125 PetriNetUnfolderBase]: For 26583/26598 co-relation queries the response was YES. [2024-06-20 16:55:55,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15491 conditions, 2928 events. 1963/2928 cut-off events. For 26583/26598 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 13513 event pairs, 488 based on Foata normal form. 18/2941 useless extension candidates. Maximal degree in co-relation 15449. Up to 2674 conditions per place. [2024-06-20 16:55:55,517 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 139 selfloop transitions, 31 changer transitions 0/173 dead transitions. [2024-06-20 16:55:55,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 173 transitions, 1872 flow [2024-06-20 16:55:55,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:55:55,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:55:55,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-20 16:55:55,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4037940379403794 [2024-06-20 16:55:55,519 INFO L175 Difference]: Start difference. First operand has 91 places, 120 transitions, 1128 flow. Second operand 9 states and 149 transitions. [2024-06-20 16:55:55,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 173 transitions, 1872 flow [2024-06-20 16:55:55,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 173 transitions, 1795 flow, removed 34 selfloop flow, removed 2 redundant places. [2024-06-20 16:55:55,557 INFO L231 Difference]: Finished difference. Result has 100 places, 130 transitions, 1283 flow [2024-06-20 16:55:55,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1063, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1283, PETRI_PLACES=100, PETRI_TRANSITIONS=130} [2024-06-20 16:55:55,558 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 58 predicate places. [2024-06-20 16:55:55,558 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 130 transitions, 1283 flow [2024-06-20 16:55:55,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:55,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:55:55,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:55:55,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 16:55:55,559 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:55:55,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:55:55,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1184065389, now seen corresponding path program 2 times [2024-06-20 16:55:55,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:55:55,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193431548] [2024-06-20 16:55:55,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:55:55,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:55:55,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:55:58,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:55:58,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:55:58,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193431548] [2024-06-20 16:55:58,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193431548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:55:58,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:55:58,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:55:58,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701216757] [2024-06-20 16:55:58,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:55:58,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:55:58,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:55:58,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:55:58,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:55:58,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-20 16:55:58,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 130 transitions, 1283 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:58,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:55:58,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-20 16:55:58,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:55:59,334 INFO L124 PetriNetUnfolderBase]: 1966/2932 cut-off events. [2024-06-20 16:55:59,334 INFO L125 PetriNetUnfolderBase]: For 29758/29773 co-relation queries the response was YES. [2024-06-20 16:55:59,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16017 conditions, 2932 events. 1966/2932 cut-off events. For 29758/29773 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 13469 event pairs, 521 based on Foata normal form. 12/2939 useless extension candidates. Maximal degree in co-relation 15971. Up to 2832 conditions per place. [2024-06-20 16:55:59,349 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 141 selfloop transitions, 22 changer transitions 0/166 dead transitions. [2024-06-20 16:55:59,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 166 transitions, 1787 flow [2024-06-20 16:55:59,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:55:59,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:55:59,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-20 16:55:59,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-20 16:55:59,351 INFO L175 Difference]: Start difference. First operand has 100 places, 130 transitions, 1283 flow. Second operand 8 states and 127 transitions. [2024-06-20 16:55:59,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 166 transitions, 1787 flow [2024-06-20 16:55:59,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 166 transitions, 1671 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-20 16:55:59,377 INFO L231 Difference]: Finished difference. Result has 105 places, 136 transitions, 1319 flow [2024-06-20 16:55:59,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1199, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1319, PETRI_PLACES=105, PETRI_TRANSITIONS=136} [2024-06-20 16:55:59,378 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 63 predicate places. [2024-06-20 16:55:59,378 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 136 transitions, 1319 flow [2024-06-20 16:55:59,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:59,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:55:59,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:55:59,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 16:55:59,379 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:55:59,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:55:59,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1184059654, now seen corresponding path program 3 times [2024-06-20 16:55:59,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:55:59,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231678507] [2024-06-20 16:55:59,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:55:59,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:55:59,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:56:01,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:56:01,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:56:01,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231678507] [2024-06-20 16:56:01,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231678507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:56:01,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:56:01,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:56:01,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519732544] [2024-06-20 16:56:01,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:56:01,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:56:01,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:56:01,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:56:01,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:56:01,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-20 16:56:01,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 136 transitions, 1319 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:56:01,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:56:01,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-20 16:56:01,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:56:03,235 INFO L124 PetriNetUnfolderBase]: 2011/2997 cut-off events. [2024-06-20 16:56:03,235 INFO L125 PetriNetUnfolderBase]: For 33035/33050 co-relation queries the response was YES. [2024-06-20 16:56:03,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16853 conditions, 2997 events. 2011/2997 cut-off events. For 33035/33050 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 13834 event pairs, 504 based on Foata normal form. 22/3014 useless extension candidates. Maximal degree in co-relation 16804. Up to 2770 conditions per place. [2024-06-20 16:56:03,251 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 142 selfloop transitions, 42 changer transitions 0/187 dead transitions. [2024-06-20 16:56:03,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 187 transitions, 2045 flow [2024-06-20 16:56:03,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:56:03,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:56:03,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-20 16:56:03,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38482384823848237 [2024-06-20 16:56:03,252 INFO L175 Difference]: Start difference. First operand has 105 places, 136 transitions, 1319 flow. Second operand 9 states and 142 transitions. [2024-06-20 16:56:03,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 187 transitions, 2045 flow [2024-06-20 16:56:03,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 187 transitions, 1995 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-20 16:56:03,282 INFO L231 Difference]: Finished difference. Result has 110 places, 156 transitions, 1651 flow [2024-06-20 16:56:03,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1269, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1651, PETRI_PLACES=110, PETRI_TRANSITIONS=156} [2024-06-20 16:56:03,283 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 68 predicate places. [2024-06-20 16:56:03,283 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 156 transitions, 1651 flow [2024-06-20 16:56:03,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:56:03,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:56:03,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:56:03,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 16:56:03,284 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:56:03,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:56:03,284 INFO L85 PathProgramCache]: Analyzing trace with hash -467741318, now seen corresponding path program 4 times [2024-06-20 16:56:03,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:56:03,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204763706] [2024-06-20 16:56:03,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:56:03,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:56:03,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:56:05,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:56:05,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:56:05,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204763706] [2024-06-20 16:56:05,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204763706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:56:05,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:56:05,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:56:05,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405676928] [2024-06-20 16:56:05,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:56:05,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:56:05,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:56:05,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:56:05,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:56:05,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-20 16:56:05,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 156 transitions, 1651 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:56:05,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:56:05,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-20 16:56:05,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:56:07,081 INFO L124 PetriNetUnfolderBase]: 2047/3049 cut-off events. [2024-06-20 16:56:07,081 INFO L125 PetriNetUnfolderBase]: For 38548/38563 co-relation queries the response was YES. [2024-06-20 16:56:07,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18409 conditions, 3049 events. 2047/3049 cut-off events. For 38548/38563 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 14078 event pairs, 486 based on Foata normal form. 18/3062 useless extension candidates. Maximal degree in co-relation 18357. Up to 2845 conditions per place. [2024-06-20 16:56:07,098 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 167 selfloop transitions, 41 changer transitions 0/211 dead transitions. [2024-06-20 16:56:07,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 211 transitions, 2481 flow [2024-06-20 16:56:07,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:56:07,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:56:07,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-20 16:56:07,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-20 16:56:07,099 INFO L175 Difference]: Start difference. First operand has 110 places, 156 transitions, 1651 flow. Second operand 8 states and 136 transitions. [2024-06-20 16:56:07,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 211 transitions, 2481 flow [2024-06-20 16:56:07,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 211 transitions, 2389 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-20 16:56:07,141 INFO L231 Difference]: Finished difference. Result has 117 places, 179 transitions, 1982 flow [2024-06-20 16:56:07,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1559, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1982, PETRI_PLACES=117, PETRI_TRANSITIONS=179} [2024-06-20 16:56:07,141 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 75 predicate places. [2024-06-20 16:56:07,142 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 179 transitions, 1982 flow [2024-06-20 16:56:07,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:56:07,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:56:07,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:56:07,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 16:56:07,142 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:56:07,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:56:07,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1094440153, now seen corresponding path program 1 times [2024-06-20 16:56:07,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:56:07,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494211346] [2024-06-20 16:56:07,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:56:07,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:56:07,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:56:08,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:56:08,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:56:08,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494211346] [2024-06-20 16:56:08,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494211346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:56:08,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:56:08,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:56:08,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190946393] [2024-06-20 16:56:08,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:56:08,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:56:08,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:56:08,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:56:08,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:56:08,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-20 16:56:08,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 179 transitions, 1982 flow. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:56:08,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:56:08,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-20 16:56:08,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:56:09,346 INFO L124 PetriNetUnfolderBase]: 2041/3039 cut-off events. [2024-06-20 16:56:09,347 INFO L125 PetriNetUnfolderBase]: For 41501/41501 co-relation queries the response was YES. [2024-06-20 16:56:09,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19297 conditions, 3039 events. 2041/3039 cut-off events. For 41501/41501 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 14114 event pairs, 488 based on Foata normal form. 2/3038 useless extension candidates. Maximal degree in co-relation 19240. Up to 3019 conditions per place. [2024-06-20 16:56:09,364 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 178 selfloop transitions, 10 changer transitions 0/191 dead transitions. [2024-06-20 16:56:09,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 191 transitions, 2402 flow [2024-06-20 16:56:09,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:56:09,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:56:09,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 76 transitions. [2024-06-20 16:56:09,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37073170731707317 [2024-06-20 16:56:09,366 INFO L175 Difference]: Start difference. First operand has 117 places, 179 transitions, 1982 flow. Second operand 5 states and 76 transitions. [2024-06-20 16:56:09,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 191 transitions, 2402 flow [2024-06-20 16:56:09,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 191 transitions, 2294 flow, removed 53 selfloop flow, removed 1 redundant places. [2024-06-20 16:56:09,410 INFO L231 Difference]: Finished difference. Result has 122 places, 180 transitions, 1918 flow [2024-06-20 16:56:09,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1874, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1918, PETRI_PLACES=122, PETRI_TRANSITIONS=180} [2024-06-20 16:56:09,411 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 80 predicate places. [2024-06-20 16:56:09,411 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 180 transitions, 1918 flow [2024-06-20 16:56:09,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:56:09,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:56:09,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:56:09,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 16:56:09,412 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:56:09,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:56:09,412 INFO L85 PathProgramCache]: Analyzing trace with hash -386003000, now seen corresponding path program 1 times [2024-06-20 16:56:09,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:56:09,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298234753] [2024-06-20 16:56:09,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:56:09,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:56:09,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:56:12,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:56:12,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:56:12,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298234753] [2024-06-20 16:56:12,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298234753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:56:12,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:56:12,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:56:12,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711656875] [2024-06-20 16:56:12,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:56:12,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:56:12,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:56:12,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:56:12,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:56:12,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-20 16:56:12,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 180 transitions, 1918 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:56:12,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:56:12,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-20 16:56:12,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:56:13,969 INFO L124 PetriNetUnfolderBase]: 2061/3075 cut-off events. [2024-06-20 16:56:13,970 INFO L125 PetriNetUnfolderBase]: For 45463/45521 co-relation queries the response was YES. [2024-06-20 16:56:13,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19416 conditions, 3075 events. 2061/3075 cut-off events. For 45463/45521 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 14375 event pairs, 367 based on Foata normal form. 38/3106 useless extension candidates. Maximal degree in co-relation 19355. Up to 2811 conditions per place. [2024-06-20 16:56:13,987 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 190 selfloop transitions, 33 changer transitions 0/226 dead transitions. [2024-06-20 16:56:13,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 226 transitions, 2633 flow [2024-06-20 16:56:13,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:56:13,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:56:13,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-20 16:56:13,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-20 16:56:13,989 INFO L175 Difference]: Start difference. First operand has 122 places, 180 transitions, 1918 flow. Second operand 8 states and 138 transitions. [2024-06-20 16:56:13,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 226 transitions, 2633 flow [2024-06-20 16:56:14,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 226 transitions, 2609 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-20 16:56:14,031 INFO L231 Difference]: Finished difference. Result has 127 places, 184 transitions, 2067 flow [2024-06-20 16:56:14,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1894, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2067, PETRI_PLACES=127, PETRI_TRANSITIONS=184} [2024-06-20 16:56:14,032 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 85 predicate places. [2024-06-20 16:56:14,032 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 184 transitions, 2067 flow [2024-06-20 16:56:14,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:56:14,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:56:14,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:56:14,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 16:56:14,032 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:56:14,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:56:14,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1830592964, now seen corresponding path program 1 times [2024-06-20 16:56:14,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:56:14,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942287369] [2024-06-20 16:56:14,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:56:14,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:56:14,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:56:16,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:56:16,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:56:16,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942287369] [2024-06-20 16:56:16,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942287369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:56:16,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:56:16,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:56:16,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680487530] [2024-06-20 16:56:16,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:56:16,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:56:16,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:56:16,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:56:16,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:56:16,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-20 16:56:16,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 184 transitions, 2067 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:56:16,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:56:16,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-20 16:56:16,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:56:18,152 INFO L124 PetriNetUnfolderBase]: 2303/3414 cut-off events. [2024-06-20 16:56:18,152 INFO L125 PetriNetUnfolderBase]: For 56614/56672 co-relation queries the response was YES. [2024-06-20 16:56:18,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22288 conditions, 3414 events. 2303/3414 cut-off events. For 56614/56672 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 16104 event pairs, 463 based on Foata normal form. 42/3449 useless extension candidates. Maximal degree in co-relation 22226. Up to 2627 conditions per place. [2024-06-20 16:56:18,183 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 176 selfloop transitions, 80 changer transitions 0/259 dead transitions. [2024-06-20 16:56:18,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 259 transitions, 3239 flow [2024-06-20 16:56:18,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:56:18,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:56:18,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-20 16:56:18,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-20 16:56:18,185 INFO L175 Difference]: Start difference. First operand has 127 places, 184 transitions, 2067 flow. Second operand 9 states and 174 transitions. [2024-06-20 16:56:18,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 259 transitions, 3239 flow [2024-06-20 16:56:18,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 259 transitions, 3152 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-20 16:56:18,301 INFO L231 Difference]: Finished difference. Result has 134 places, 200 transitions, 2419 flow [2024-06-20 16:56:18,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1980, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2419, PETRI_PLACES=134, PETRI_TRANSITIONS=200} [2024-06-20 16:56:18,302 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 92 predicate places. [2024-06-20 16:56:18,302 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 200 transitions, 2419 flow [2024-06-20 16:56:18,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:56:18,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:56:18,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:56:18,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 16:56:18,303 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:56:18,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:56:18,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1830592840, now seen corresponding path program 2 times [2024-06-20 16:56:18,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:56:18,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854123624] [2024-06-20 16:56:18,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:56:18,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:56:18,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:56:20,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:56:20,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:56:20,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854123624] [2024-06-20 16:56:20,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854123624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:56:20,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:56:20,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:56:20,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276019853] [2024-06-20 16:56:20,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:56:20,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:56:20,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:56:20,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:56:20,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:56:21,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-20 16:56:21,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 200 transitions, 2419 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:56:21,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:56:21,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-20 16:56:21,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:56:22,253 INFO L124 PetriNetUnfolderBase]: 2323/3446 cut-off events. [2024-06-20 16:56:22,253 INFO L125 PetriNetUnfolderBase]: For 65192/65250 co-relation queries the response was YES. [2024-06-20 16:56:22,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23949 conditions, 3446 events. 2323/3446 cut-off events. For 65192/65250 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 16350 event pairs, 504 based on Foata normal form. 38/3477 useless extension candidates. Maximal degree in co-relation 23883. Up to 3288 conditions per place. [2024-06-20 16:56:22,279 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 211 selfloop transitions, 26 changer transitions 0/240 dead transitions. [2024-06-20 16:56:22,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 240 transitions, 3027 flow [2024-06-20 16:56:22,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:56:22,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:56:22,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-20 16:56:22,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-20 16:56:22,281 INFO L175 Difference]: Start difference. First operand has 134 places, 200 transitions, 2419 flow. Second operand 8 states and 134 transitions. [2024-06-20 16:56:22,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 240 transitions, 3027 flow [2024-06-20 16:56:22,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 240 transitions, 2878 flow, removed 52 selfloop flow, removed 3 redundant places. [2024-06-20 16:56:22,351 INFO L231 Difference]: Finished difference. Result has 139 places, 202 transitions, 2375 flow [2024-06-20 16:56:22,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2270, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2375, PETRI_PLACES=139, PETRI_TRANSITIONS=202} [2024-06-20 16:56:22,352 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 97 predicate places. [2024-06-20 16:56:22,352 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 202 transitions, 2375 flow [2024-06-20 16:56:22,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:56:22,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:56:22,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:56:22,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 16:56:22,353 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:56:22,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:56:22,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1944211870, now seen corresponding path program 3 times [2024-06-20 16:56:22,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:56:22,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861317302] [2024-06-20 16:56:22,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:56:22,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:56:22,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:56:26,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:56:26,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:56:26,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861317302] [2024-06-20 16:56:26,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861317302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:56:26,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:56:26,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:56:26,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732807929] [2024-06-20 16:56:26,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:56:26,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:56:26,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:56:26,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:56:26,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:56:26,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-20 16:56:26,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 202 transitions, 2375 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:56:26,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:56:26,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-20 16:56:26,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:56:27,247 INFO L124 PetriNetUnfolderBase]: 2343/3476 cut-off events. [2024-06-20 16:56:27,248 INFO L125 PetriNetUnfolderBase]: For 66927/66945 co-relation queries the response was YES. [2024-06-20 16:56:27,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24041 conditions, 3476 events. 2343/3476 cut-off events. For 66927/66945 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 16488 event pairs, 480 based on Foata normal form. 16/3487 useless extension candidates. Maximal degree in co-relation 23973. Up to 3378 conditions per place. [2024-06-20 16:56:27,273 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 219 selfloop transitions, 18 changer transitions 0/240 dead transitions. [2024-06-20 16:56:27,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 240 transitions, 2993 flow [2024-06-20 16:56:27,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:56:27,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:56:27,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-20 16:56:27,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-20 16:56:27,275 INFO L175 Difference]: Start difference. First operand has 139 places, 202 transitions, 2375 flow. Second operand 8 states and 127 transitions. [2024-06-20 16:56:27,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 240 transitions, 2993 flow [2024-06-20 16:56:27,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 240 transitions, 2910 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-20 16:56:27,348 INFO L231 Difference]: Finished difference. Result has 142 places, 206 transitions, 2407 flow [2024-06-20 16:56:27,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2292, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2407, PETRI_PLACES=142, PETRI_TRANSITIONS=206} [2024-06-20 16:56:27,349 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 100 predicate places. [2024-06-20 16:56:27,349 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 206 transitions, 2407 flow [2024-06-20 16:56:27,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:56:27,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:56:27,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:56:27,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 16:56:27,349 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:56:27,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:56:27,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1833389474, now seen corresponding path program 2 times [2024-06-20 16:56:27,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:56:27,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651384846] [2024-06-20 16:56:27,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:56:27,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:56:27,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:56:30,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:56:30,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:56:30,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651384846] [2024-06-20 16:56:30,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651384846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:56:30,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:56:30,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:56:30,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476012634] [2024-06-20 16:56:30,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:56:30,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:56:30,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:56:30,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:56:30,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:56:30,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-20 16:56:30,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 206 transitions, 2407 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:56:30,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:56:30,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-20 16:56:30,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:56:31,993 INFO L124 PetriNetUnfolderBase]: 2481/3674 cut-off events. [2024-06-20 16:56:31,993 INFO L125 PetriNetUnfolderBase]: For 76549/76607 co-relation queries the response was YES. [2024-06-20 16:56:32,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25680 conditions, 3674 events. 2481/3674 cut-off events. For 76549/76607 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 17621 event pairs, 458 based on Foata normal form. 42/3709 useless extension candidates. Maximal degree in co-relation 25610. Up to 3121 conditions per place. [2024-06-20 16:56:32,021 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 210 selfloop transitions, 54 changer transitions 0/267 dead transitions. [2024-06-20 16:56:32,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 267 transitions, 3497 flow [2024-06-20 16:56:32,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:56:32,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:56:32,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-20 16:56:32,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45257452574525747 [2024-06-20 16:56:32,023 INFO L175 Difference]: Start difference. First operand has 142 places, 206 transitions, 2407 flow. Second operand 9 states and 167 transitions. [2024-06-20 16:56:32,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 267 transitions, 3497 flow [2024-06-20 16:56:32,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 267 transitions, 3418 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-20 16:56:32,108 INFO L231 Difference]: Finished difference. Result has 147 places, 214 transitions, 2598 flow [2024-06-20 16:56:32,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2328, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2598, PETRI_PLACES=147, PETRI_TRANSITIONS=214} [2024-06-20 16:56:32,108 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 105 predicate places. [2024-06-20 16:56:32,109 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 214 transitions, 2598 flow [2024-06-20 16:56:32,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:56:32,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:56:32,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:56:32,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 16:56:32,109 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:56:32,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:56:32,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1833394124, now seen corresponding path program 3 times [2024-06-20 16:56:32,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:56:32,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392374351] [2024-06-20 16:56:32,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:56:32,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:56:32,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:56:36,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:56:36,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:56:36,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392374351] [2024-06-20 16:56:36,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392374351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:56:36,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:56:36,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:56:36,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226231609] [2024-06-20 16:56:36,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:56:36,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:56:36,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:56:36,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:56:36,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:56:36,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-20 16:56:36,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 214 transitions, 2598 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:56:36,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:56:36,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-20 16:56:36,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:56:38,078 INFO L124 PetriNetUnfolderBase]: 2499/3698 cut-off events. [2024-06-20 16:56:38,078 INFO L125 PetriNetUnfolderBase]: For 83916/83934 co-relation queries the response was YES. [2024-06-20 16:56:38,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26836 conditions, 3698 events. 2499/3698 cut-off events. For 83916/83934 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 17702 event pairs, 455 based on Foata normal form. 20/3713 useless extension candidates. Maximal degree in co-relation 26764. Up to 3365 conditions per place. [2024-06-20 16:56:38,106 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 220 selfloop transitions, 39 changer transitions 0/262 dead transitions. [2024-06-20 16:56:38,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 262 transitions, 3493 flow [2024-06-20 16:56:38,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:56:38,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:56:38,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-20 16:56:38,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-20 16:56:38,108 INFO L175 Difference]: Start difference. First operand has 147 places, 214 transitions, 2598 flow. Second operand 9 states and 155 transitions. [2024-06-20 16:56:38,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 262 transitions, 3493 flow [2024-06-20 16:56:38,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 262 transitions, 3326 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-20 16:56:38,192 INFO L231 Difference]: Finished difference. Result has 151 places, 218 transitions, 2605 flow [2024-06-20 16:56:38,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2449, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2605, PETRI_PLACES=151, PETRI_TRANSITIONS=218} [2024-06-20 16:56:38,192 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 109 predicate places. [2024-06-20 16:56:38,192 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 218 transitions, 2605 flow [2024-06-20 16:56:38,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:56:38,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:56:38,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:56:38,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 16:56:38,193 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:56:38,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:56:38,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1946486634, now seen corresponding path program 1 times [2024-06-20 16:56:38,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:56:38,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305764648] [2024-06-20 16:56:38,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:56:38,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:56:38,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:56:41,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:56:41,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:56:41,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305764648] [2024-06-20 16:56:41,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305764648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:56:41,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:56:41,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:56:41,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86491077] [2024-06-20 16:56:41,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:56:41,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:56:41,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:56:41,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:56:41,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:56:41,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-20 16:56:41,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 218 transitions, 2605 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:56:41,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:56:41,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-20 16:56:41,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:56:43,236 INFO L124 PetriNetUnfolderBase]: 2579/3826 cut-off events. [2024-06-20 16:56:43,236 INFO L125 PetriNetUnfolderBase]: For 90073/90091 co-relation queries the response was YES. [2024-06-20 16:56:43,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27541 conditions, 3826 events. 2579/3826 cut-off events. For 90073/90091 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 18517 event pairs, 482 based on Foata normal form. 28/3849 useless extension candidates. Maximal degree in co-relation 27467. Up to 3396 conditions per place. [2024-06-20 16:56:43,281 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 196 selfloop transitions, 57 changer transitions 0/256 dead transitions. [2024-06-20 16:56:43,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 256 transitions, 3389 flow [2024-06-20 16:56:43,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:56:43,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:56:43,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-20 16:56:43,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-20 16:56:43,283 INFO L175 Difference]: Start difference. First operand has 151 places, 218 transitions, 2605 flow. Second operand 9 states and 148 transitions. [2024-06-20 16:56:43,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 256 transitions, 3389 flow [2024-06-20 16:56:43,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 256 transitions, 3242 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-20 16:56:43,398 INFO L231 Difference]: Finished difference. Result has 154 places, 220 transitions, 2638 flow [2024-06-20 16:56:43,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2458, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2638, PETRI_PLACES=154, PETRI_TRANSITIONS=220} [2024-06-20 16:56:43,398 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 112 predicate places. [2024-06-20 16:56:43,398 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 220 transitions, 2638 flow [2024-06-20 16:56:43,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:56:43,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:56:43,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:56:43,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 16:56:43,399 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:56:43,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:56:43,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1948858274, now seen corresponding path program 4 times [2024-06-20 16:56:43,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:56:43,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144709651] [2024-06-20 16:56:43,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:56:43,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:56:43,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:56:46,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:56:46,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:56:46,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144709651] [2024-06-20 16:56:46,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144709651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:56:46,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:56:46,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:56:46,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76263998] [2024-06-20 16:56:46,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:56:46,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:56:46,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:56:46,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:56:46,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:56:46,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-20 16:56:46,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 220 transitions, 2638 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:56:46,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:56:46,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-20 16:56:46,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:56:47,984 INFO L124 PetriNetUnfolderBase]: 2693/3988 cut-off events. [2024-06-20 16:56:47,984 INFO L125 PetriNetUnfolderBase]: For 96540/96558 co-relation queries the response was YES. [2024-06-20 16:56:48,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28891 conditions, 3988 events. 2693/3988 cut-off events. For 96540/96558 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 19415 event pairs, 504 based on Foata normal form. 20/4003 useless extension candidates. Maximal degree in co-relation 28817. Up to 3612 conditions per place. [2024-06-20 16:56:48,021 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 213 selfloop transitions, 66 changer transitions 0/282 dead transitions. [2024-06-20 16:56:48,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 282 transitions, 3830 flow [2024-06-20 16:56:48,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 16:56:48,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 16:56:48,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 186 transitions. [2024-06-20 16:56:48,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-20 16:56:48,024 INFO L175 Difference]: Start difference. First operand has 154 places, 220 transitions, 2638 flow. Second operand 12 states and 186 transitions. [2024-06-20 16:56:48,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 282 transitions, 3830 flow [2024-06-20 16:56:48,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 282 transitions, 3670 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-20 16:56:48,149 INFO L231 Difference]: Finished difference. Result has 162 places, 239 transitions, 2992 flow [2024-06-20 16:56:48,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2498, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2992, PETRI_PLACES=162, PETRI_TRANSITIONS=239} [2024-06-20 16:56:48,150 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 120 predicate places. [2024-06-20 16:56:48,150 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 239 transitions, 2992 flow [2024-06-20 16:56:48,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:56:48,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:56:48,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:56:48,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 16:56:48,151 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:56:48,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:56:48,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1946301936, now seen corresponding path program 4 times [2024-06-20 16:56:48,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:56:48,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492295645] [2024-06-20 16:56:48,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:56:48,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:56:48,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:56:51,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:56:51,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:56:51,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492295645] [2024-06-20 16:56:51,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492295645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:56:51,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:56:51,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:56:51,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99083600] [2024-06-20 16:56:51,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:56:51,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:56:51,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:56:51,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:56:51,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:56:51,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-20 16:56:51,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 239 transitions, 2992 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:56:51,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:56:51,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-20 16:56:51,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:56:53,367 INFO L124 PetriNetUnfolderBase]: 2776/4115 cut-off events. [2024-06-20 16:56:53,368 INFO L125 PetriNetUnfolderBase]: For 104159/104174 co-relation queries the response was YES. [2024-06-20 16:56:53,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30391 conditions, 4115 events. 2776/4115 cut-off events. For 104159/104174 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 20044 event pairs, 537 based on Foata normal form. 14/4125 useless extension candidates. Maximal degree in co-relation 30313. Up to 3985 conditions per place. [2024-06-20 16:56:53,399 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 269 selfloop transitions, 31 changer transitions 0/303 dead transitions. [2024-06-20 16:56:53,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 303 transitions, 3989 flow [2024-06-20 16:56:53,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:56:53,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:56:53,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2024-06-20 16:56:53,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3878048780487805 [2024-06-20 16:56:53,401 INFO L175 Difference]: Start difference. First operand has 162 places, 239 transitions, 2992 flow. Second operand 10 states and 159 transitions. [2024-06-20 16:56:53,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 303 transitions, 3989 flow [2024-06-20 16:56:53,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 303 transitions, 3803 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-20 16:56:53,508 INFO L231 Difference]: Finished difference. Result has 169 places, 259 transitions, 3211 flow [2024-06-20 16:56:53,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2826, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3211, PETRI_PLACES=169, PETRI_TRANSITIONS=259} [2024-06-20 16:56:53,509 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 127 predicate places. [2024-06-20 16:56:53,509 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 259 transitions, 3211 flow [2024-06-20 16:56:53,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:56:53,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:56:53,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:56:53,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 16:56:53,509 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:56:53,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:56:53,509 INFO L85 PathProgramCache]: Analyzing trace with hash -875526832, now seen corresponding path program 5 times [2024-06-20 16:56:53,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:56:53,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014105747] [2024-06-20 16:56:53,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:56:53,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:56:53,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:56:56,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:56:56,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:56:56,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014105747] [2024-06-20 16:56:56,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014105747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:56:56,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:56:56,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:56:56,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128664199] [2024-06-20 16:56:56,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:56:56,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:56:56,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:56:56,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:56:56,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:56:56,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-20 16:56:56,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 259 transitions, 3211 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:56:56,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:56:56,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-20 16:56:56,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:56:58,164 INFO L124 PetriNetUnfolderBase]: 2768/4104 cut-off events. [2024-06-20 16:56:58,164 INFO L125 PetriNetUnfolderBase]: For 108647/108665 co-relation queries the response was YES. [2024-06-20 16:56:58,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30244 conditions, 4104 events. 2768/4104 cut-off events. For 108647/108665 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 19975 event pairs, 535 based on Foata normal form. 16/4113 useless extension candidates. Maximal degree in co-relation 30161. Up to 3925 conditions per place. [2024-06-20 16:56:58,204 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 250 selfloop transitions, 37 changer transitions 0/290 dead transitions. [2024-06-20 16:56:58,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 290 transitions, 3875 flow [2024-06-20 16:56:58,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:56:58,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:56:58,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-20 16:56:58,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-20 16:56:58,205 INFO L175 Difference]: Start difference. First operand has 169 places, 259 transitions, 3211 flow. Second operand 8 states and 124 transitions. [2024-06-20 16:56:58,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 290 transitions, 3875 flow [2024-06-20 16:56:58,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 290 transitions, 3759 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-20 16:56:58,369 INFO L231 Difference]: Finished difference. Result has 174 places, 259 transitions, 3179 flow [2024-06-20 16:56:58,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3095, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3179, PETRI_PLACES=174, PETRI_TRANSITIONS=259} [2024-06-20 16:56:58,370 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 132 predicate places. [2024-06-20 16:56:58,370 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 259 transitions, 3179 flow [2024-06-20 16:56:58,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:56:58,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:56:58,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:56:58,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 16:56:58,371 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:56:58,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:56:58,372 INFO L85 PathProgramCache]: Analyzing trace with hash 132018222, now seen corresponding path program 5 times [2024-06-20 16:56:58,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:56:58,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885414741] [2024-06-20 16:56:58,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:56:58,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:56:58,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:57:01,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:57:01,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:57:01,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885414741] [2024-06-20 16:57:01,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885414741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:57:01,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:57:01,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:57:01,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146568342] [2024-06-20 16:57:01,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:57:01,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:57:01,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:57:01,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:57:01,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:57:01,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-20 16:57:01,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 259 transitions, 3179 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:57:01,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:57:01,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-20 16:57:01,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:57:02,944 INFO L124 PetriNetUnfolderBase]: 2862/4237 cut-off events. [2024-06-20 16:57:02,944 INFO L125 PetriNetUnfolderBase]: For 117977/117995 co-relation queries the response was YES. [2024-06-20 16:57:02,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31374 conditions, 4237 events. 2862/4237 cut-off events. For 117977/117995 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 20765 event pairs, 497 based on Foata normal form. 20/4250 useless extension candidates. Maximal degree in co-relation 31290. Up to 3666 conditions per place. [2024-06-20 16:57:02,979 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 230 selfloop transitions, 90 changer transitions 0/323 dead transitions. [2024-06-20 16:57:02,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 323 transitions, 4469 flow [2024-06-20 16:57:02,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:57:02,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:57:02,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 186 transitions. [2024-06-20 16:57:02,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4124168514412417 [2024-06-20 16:57:02,980 INFO L175 Difference]: Start difference. First operand has 174 places, 259 transitions, 3179 flow. Second operand 11 states and 186 transitions. [2024-06-20 16:57:02,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 323 transitions, 4469 flow [2024-06-20 16:57:03,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 323 transitions, 4362 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-20 16:57:03,113 INFO L231 Difference]: Finished difference. Result has 179 places, 270 transitions, 3507 flow [2024-06-20 16:57:03,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3082, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3507, PETRI_PLACES=179, PETRI_TRANSITIONS=270} [2024-06-20 16:57:03,113 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 137 predicate places. [2024-06-20 16:57:03,114 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 270 transitions, 3507 flow [2024-06-20 16:57:03,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:57:03,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:57:03,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:57:03,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 16:57:03,114 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:57:03,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:57:03,115 INFO L85 PathProgramCache]: Analyzing trace with hash 132013572, now seen corresponding path program 6 times [2024-06-20 16:57:03,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:57:03,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231468449] [2024-06-20 16:57:03,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:57:03,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:57:03,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:57:05,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:57:05,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:57:05,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231468449] [2024-06-20 16:57:05,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231468449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:57:05,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:57:05,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:57:05,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389292164] [2024-06-20 16:57:05,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:57:05,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:57:05,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:57:05,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:57:05,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:57:05,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-20 16:57:05,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 270 transitions, 3507 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:57:05,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:57:05,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-20 16:57:05,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:57:07,687 INFO L124 PetriNetUnfolderBase]: 2904/4296 cut-off events. [2024-06-20 16:57:07,687 INFO L125 PetriNetUnfolderBase]: For 121886/121904 co-relation queries the response was YES. [2024-06-20 16:57:07,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32520 conditions, 4296 events. 2904/4296 cut-off events. For 121886/121904 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 21132 event pairs, 497 based on Foata normal form. 20/4309 useless extension candidates. Maximal degree in co-relation 32434. Up to 3503 conditions per place. [2024-06-20 16:57:07,730 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 231 selfloop transitions, 97 changer transitions 0/331 dead transitions. [2024-06-20 16:57:07,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 331 transitions, 4775 flow [2024-06-20 16:57:07,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:57:07,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:57:07,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2024-06-20 16:57:07,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-20 16:57:07,732 INFO L175 Difference]: Start difference. First operand has 179 places, 270 transitions, 3507 flow. Second operand 11 states and 187 transitions. [2024-06-20 16:57:07,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 331 transitions, 4775 flow [2024-06-20 16:57:07,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 331 transitions, 4638 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-20 16:57:07,917 INFO L231 Difference]: Finished difference. Result has 186 places, 278 transitions, 3757 flow [2024-06-20 16:57:07,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3372, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3757, PETRI_PLACES=186, PETRI_TRANSITIONS=278} [2024-06-20 16:57:07,917 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 144 predicate places. [2024-06-20 16:57:07,917 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 278 transitions, 3757 flow [2024-06-20 16:57:07,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:57:07,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:57:07,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:57:07,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 16:57:07,918 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:57:07,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:57:07,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1615077086, now seen corresponding path program 7 times [2024-06-20 16:57:07,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:57:07,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567671614] [2024-06-20 16:57:07,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:57:07,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:57:07,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:57:10,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:57:10,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:57:10,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567671614] [2024-06-20 16:57:10,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567671614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:57:10,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:57:10,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:57:10,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639075776] [2024-06-20 16:57:10,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:57:10,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:57:10,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:57:10,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:57:10,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:57:10,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-20 16:57:10,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 278 transitions, 3757 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:57:10,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:57:10,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-20 16:57:10,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:57:12,520 INFO L124 PetriNetUnfolderBase]: 2940/4348 cut-off events. [2024-06-20 16:57:12,520 INFO L125 PetriNetUnfolderBase]: For 130070/130088 co-relation queries the response was YES. [2024-06-20 16:57:12,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33711 conditions, 4348 events. 2940/4348 cut-off events. For 130070/130088 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 21368 event pairs, 517 based on Foata normal form. 20/4361 useless extension candidates. Maximal degree in co-relation 33622. Up to 4051 conditions per place. [2024-06-20 16:57:12,558 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 268 selfloop transitions, 51 changer transitions 0/322 dead transitions. [2024-06-20 16:57:12,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 322 transitions, 4783 flow [2024-06-20 16:57:12,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:57:12,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:57:12,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-20 16:57:12,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-20 16:57:12,560 INFO L175 Difference]: Start difference. First operand has 186 places, 278 transitions, 3757 flow. Second operand 9 states and 153 transitions. [2024-06-20 16:57:12,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 322 transitions, 4783 flow [2024-06-20 16:57:12,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 322 transitions, 4594 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-20 16:57:12,735 INFO L231 Difference]: Finished difference. Result has 188 places, 282 transitions, 3779 flow [2024-06-20 16:57:12,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3568, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3779, PETRI_PLACES=188, PETRI_TRANSITIONS=282} [2024-06-20 16:57:12,736 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 146 predicate places. [2024-06-20 16:57:12,736 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 282 transitions, 3779 flow [2024-06-20 16:57:12,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:57:12,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:57:12,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:57:12,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 16:57:12,737 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:57:12,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:57:12,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1606796180, now seen corresponding path program 1 times [2024-06-20 16:57:12,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:57:12,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262136664] [2024-06-20 16:57:12,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:57:12,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:57:12,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:57:15,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:57:15,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:57:15,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262136664] [2024-06-20 16:57:15,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262136664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:57:15,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:57:15,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:57:15,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131171543] [2024-06-20 16:57:15,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:57:15,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:57:15,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:57:15,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:57:15,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:57:15,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-20 16:57:15,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 282 transitions, 3779 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:57:15,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:57:15,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-20 16:57:15,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:57:17,188 INFO L124 PetriNetUnfolderBase]: 2956/4371 cut-off events. [2024-06-20 16:57:17,188 INFO L125 PetriNetUnfolderBase]: For 134010/134028 co-relation queries the response was YES. [2024-06-20 16:57:17,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34297 conditions, 4371 events. 2956/4371 cut-off events. For 134010/134028 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 21522 event pairs, 518 based on Foata normal form. 17/4381 useless extension candidates. Maximal degree in co-relation 34206. Up to 3842 conditions per place. [2024-06-20 16:57:17,234 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 233 selfloop transitions, 91 changer transitions 0/327 dead transitions. [2024-06-20 16:57:17,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 327 transitions, 4875 flow [2024-06-20 16:57:17,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:57:17,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:57:17,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-20 16:57:17,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-20 16:57:17,235 INFO L175 Difference]: Start difference. First operand has 188 places, 282 transitions, 3779 flow. Second operand 8 states and 143 transitions. [2024-06-20 16:57:17,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 327 transitions, 4875 flow [2024-06-20 16:57:17,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 327 transitions, 4694 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-20 16:57:17,430 INFO L231 Difference]: Finished difference. Result has 189 places, 286 transitions, 3902 flow [2024-06-20 16:57:17,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3598, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3902, PETRI_PLACES=189, PETRI_TRANSITIONS=286} [2024-06-20 16:57:17,430 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 147 predicate places. [2024-06-20 16:57:17,431 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 286 transitions, 3902 flow [2024-06-20 16:57:17,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:57:17,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:57:17,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:57:17,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 16:57:17,431 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:57:17,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:57:17,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1615070142, now seen corresponding path program 2 times [2024-06-20 16:57:17,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:57:17,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617245046] [2024-06-20 16:57:17,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:57:17,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:57:17,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:57:21,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:57:21,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:57:21,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617245046] [2024-06-20 16:57:21,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617245046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:57:21,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:57:21,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:57:21,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839723129] [2024-06-20 16:57:21,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:57:21,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:57:21,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:57:21,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:57:21,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:57:21,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-20 16:57:21,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 286 transitions, 3902 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:57:21,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:57:21,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-20 16:57:21,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:57:23,243 INFO L124 PetriNetUnfolderBase]: 3036/4499 cut-off events. [2024-06-20 16:57:23,243 INFO L125 PetriNetUnfolderBase]: For 149308/149326 co-relation queries the response was YES. [2024-06-20 16:57:23,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35519 conditions, 4499 events. 3036/4499 cut-off events. For 149308/149326 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 22300 event pairs, 533 based on Foata normal form. 28/4520 useless extension candidates. Maximal degree in co-relation 35427. Up to 3946 conditions per place. [2024-06-20 16:57:23,289 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 245 selfloop transitions, 85 changer transitions 0/333 dead transitions. [2024-06-20 16:57:23,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 333 transitions, 5022 flow [2024-06-20 16:57:23,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:57:23,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:57:23,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-20 16:57:23,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-20 16:57:23,290 INFO L175 Difference]: Start difference. First operand has 189 places, 286 transitions, 3902 flow. Second operand 8 states and 145 transitions. [2024-06-20 16:57:23,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 333 transitions, 5022 flow [2024-06-20 16:57:23,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 333 transitions, 4766 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-20 16:57:23,499 INFO L231 Difference]: Finished difference. Result has 191 places, 288 transitions, 3890 flow [2024-06-20 16:57:23,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3646, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3890, PETRI_PLACES=191, PETRI_TRANSITIONS=288} [2024-06-20 16:57:23,499 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 149 predicate places. [2024-06-20 16:57:23,499 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 288 transitions, 3890 flow [2024-06-20 16:57:23,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:57:23,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:57:23,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:57:23,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 16:57:23,500 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:57:23,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:57:23,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1606499262, now seen corresponding path program 3 times [2024-06-20 16:57:23,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:57:23,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061658114] [2024-06-20 16:57:23,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:57:23,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:57:23,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:57:27,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:57:27,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:57:27,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061658114] [2024-06-20 16:57:27,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061658114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:57:27,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:57:27,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:57:27,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552791205] [2024-06-20 16:57:27,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:57:27,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:57:27,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:57:27,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:57:27,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:57:27,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-20 16:57:27,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 288 transitions, 3890 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:57:27,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:57:27,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-20 16:57:27,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:57:29,607 INFO L124 PetriNetUnfolderBase]: 3160/4691 cut-off events. [2024-06-20 16:57:29,608 INFO L125 PetriNetUnfolderBase]: For 161929/161947 co-relation queries the response was YES. [2024-06-20 16:57:29,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36899 conditions, 4691 events. 3160/4691 cut-off events. For 161929/161947 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 23561 event pairs, 508 based on Foata normal form. 28/4712 useless extension candidates. Maximal degree in co-relation 36806. Up to 3724 conditions per place. [2024-06-20 16:57:29,645 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 250 selfloop transitions, 88 changer transitions 0/341 dead transitions. [2024-06-20 16:57:29,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 341 transitions, 5156 flow [2024-06-20 16:57:29,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:57:29,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:57:29,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 16:57:29,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-20 16:57:29,647 INFO L175 Difference]: Start difference. First operand has 191 places, 288 transitions, 3890 flow. Second operand 8 states and 149 transitions. [2024-06-20 16:57:29,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 341 transitions, 5156 flow [2024-06-20 16:57:29,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 341 transitions, 4942 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-20 16:57:29,839 INFO L231 Difference]: Finished difference. Result has 193 places, 291 transitions, 3941 flow [2024-06-20 16:57:29,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3676, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3941, PETRI_PLACES=193, PETRI_TRANSITIONS=291} [2024-06-20 16:57:29,839 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 151 predicate places. [2024-06-20 16:57:29,840 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 291 transitions, 3941 flow [2024-06-20 16:57:29,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:57:29,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:57:29,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:57:29,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 16:57:29,840 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:57:29,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:57:29,840 INFO L85 PathProgramCache]: Analyzing trace with hash 429826897, now seen corresponding path program 1 times [2024-06-20 16:57:29,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:57:29,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490669008] [2024-06-20 16:57:29,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:57:29,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:57:29,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:57:32,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:57:32,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:57:32,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490669008] [2024-06-20 16:57:32,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490669008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:57:32,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:57:32,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:57:32,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417471402] [2024-06-20 16:57:32,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:57:32,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:57:32,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:57:32,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:57:32,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:57:32,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-20 16:57:32,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 291 transitions, 3941 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:57:32,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:57:32,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-20 16:57:32,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:57:35,245 INFO L124 PetriNetUnfolderBase]: 4087/6187 cut-off events. [2024-06-20 16:57:35,245 INFO L125 PetriNetUnfolderBase]: For 269037/269095 co-relation queries the response was YES. [2024-06-20 16:57:35,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49634 conditions, 6187 events. 4087/6187 cut-off events. For 269037/269095 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 33691 event pairs, 850 based on Foata normal form. 94/6270 useless extension candidates. Maximal degree in co-relation 49540. Up to 3184 conditions per place. [2024-06-20 16:57:35,298 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 255 selfloop transitions, 122 changer transitions 0/380 dead transitions. [2024-06-20 16:57:35,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 380 transitions, 5733 flow [2024-06-20 16:57:35,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:57:35,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:57:35,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-20 16:57:35,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4951219512195122 [2024-06-20 16:57:35,302 INFO L175 Difference]: Start difference. First operand has 193 places, 291 transitions, 3941 flow. Second operand 10 states and 203 transitions. [2024-06-20 16:57:35,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 380 transitions, 5733 flow [2024-06-20 16:57:35,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 380 transitions, 5574 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-20 16:57:35,552 INFO L231 Difference]: Finished difference. Result has 201 places, 294 transitions, 4165 flow [2024-06-20 16:57:35,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3782, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4165, PETRI_PLACES=201, PETRI_TRANSITIONS=294} [2024-06-20 16:57:35,552 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 159 predicate places. [2024-06-20 16:57:35,553 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 294 transitions, 4165 flow [2024-06-20 16:57:35,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:57:35,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:57:35,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:57:35,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 16:57:35,553 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:57:35,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:57:35,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1321225195, now seen corresponding path program 2 times [2024-06-20 16:57:35,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:57:35,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804566544] [2024-06-20 16:57:35,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:57:35,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:57:35,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:57:38,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:57:38,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:57:38,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804566544] [2024-06-20 16:57:38,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804566544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:57:38,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:57:38,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:57:38,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296763289] [2024-06-20 16:57:38,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:57:38,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:57:38,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:57:38,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:57:38,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:57:38,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-20 16:57:38,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 294 transitions, 4165 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:57:38,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:57:38,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-20 16:57:38,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:57:40,884 INFO L124 PetriNetUnfolderBase]: 4736/7246 cut-off events. [2024-06-20 16:57:40,884 INFO L125 PetriNetUnfolderBase]: For 344329/344387 co-relation queries the response was YES. [2024-06-20 16:57:40,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59547 conditions, 7246 events. 4736/7246 cut-off events. For 344329/344387 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 41399 event pairs, 1280 based on Foata normal form. 94/7329 useless extension candidates. Maximal degree in co-relation 59449. Up to 5028 conditions per place. [2024-06-20 16:57:40,957 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 250 selfloop transitions, 122 changer transitions 0/375 dead transitions. [2024-06-20 16:57:40,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 375 transitions, 5871 flow [2024-06-20 16:57:40,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:57:40,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:57:40,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-20 16:57:40,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4853658536585366 [2024-06-20 16:57:40,959 INFO L175 Difference]: Start difference. First operand has 201 places, 294 transitions, 4165 flow. Second operand 10 states and 199 transitions. [2024-06-20 16:57:40,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 375 transitions, 5871 flow [2024-06-20 16:57:41,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 375 transitions, 5608 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-20 16:57:41,367 INFO L231 Difference]: Finished difference. Result has 206 places, 296 transitions, 4251 flow [2024-06-20 16:57:41,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3902, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4251, PETRI_PLACES=206, PETRI_TRANSITIONS=296} [2024-06-20 16:57:41,368 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 164 predicate places. [2024-06-20 16:57:41,368 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 296 transitions, 4251 flow [2024-06-20 16:57:41,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:57:41,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:57:41,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:57:41,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 16:57:41,368 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:57:41,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:57:41,369 INFO L85 PathProgramCache]: Analyzing trace with hash 431704567, now seen corresponding path program 3 times [2024-06-20 16:57:41,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:57:41,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501373102] [2024-06-20 16:57:41,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:57:41,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:57:41,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:57:44,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:57:44,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:57:44,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501373102] [2024-06-20 16:57:44,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501373102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:57:44,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:57:44,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:57:44,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100955303] [2024-06-20 16:57:44,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:57:44,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:57:44,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:57:44,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:57:44,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:57:44,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-20 16:57:44,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 296 transitions, 4251 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:57:44,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:57:44,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-20 16:57:44,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:57:46,976 INFO L124 PetriNetUnfolderBase]: 4888/7510 cut-off events. [2024-06-20 16:57:46,977 INFO L125 PetriNetUnfolderBase]: For 359729/359787 co-relation queries the response was YES. [2024-06-20 16:57:47,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60570 conditions, 7510 events. 4888/7510 cut-off events. For 359729/359787 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 43456 event pairs, 1500 based on Foata normal form. 102/7601 useless extension candidates. Maximal degree in co-relation 60470. Up to 5974 conditions per place. [2024-06-20 16:57:47,045 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 241 selfloop transitions, 123 changer transitions 0/367 dead transitions. [2024-06-20 16:57:47,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 367 transitions, 5677 flow [2024-06-20 16:57:47,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:57:47,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:57:47,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-20 16:57:47,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47073170731707314 [2024-06-20 16:57:47,047 INFO L175 Difference]: Start difference. First operand has 206 places, 296 transitions, 4251 flow. Second operand 10 states and 193 transitions. [2024-06-20 16:57:47,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 367 transitions, 5677 flow [2024-06-20 16:57:47,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 367 transitions, 5390 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-20 16:57:47,392 INFO L231 Difference]: Finished difference. Result has 209 places, 297 transitions, 4280 flow [2024-06-20 16:57:47,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3964, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4280, PETRI_PLACES=209, PETRI_TRANSITIONS=297} [2024-06-20 16:57:47,393 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 167 predicate places. [2024-06-20 16:57:47,393 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 297 transitions, 4280 flow [2024-06-20 16:57:47,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:57:47,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:57:47,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:57:47,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 16:57:47,394 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:57:47,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:57:47,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1408070827, now seen corresponding path program 1 times [2024-06-20 16:57:47,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:57:47,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859822210] [2024-06-20 16:57:47,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:57:47,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:57:47,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:57:52,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:57:52,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:57:52,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859822210] [2024-06-20 16:57:52,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859822210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:57:52,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:57:52,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:57:52,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067313706] [2024-06-20 16:57:52,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:57:52,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:57:52,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:57:52,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:57:52,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:57:52,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-20 16:57:52,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 297 transitions, 4280 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:57:52,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:57:52,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-20 16:57:52,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:57:55,229 INFO L124 PetriNetUnfolderBase]: 5244/8103 cut-off events. [2024-06-20 16:57:55,229 INFO L125 PetriNetUnfolderBase]: For 395519/395537 co-relation queries the response was YES. [2024-06-20 16:57:55,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64304 conditions, 8103 events. 5244/8103 cut-off events. For 395519/395537 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 47960 event pairs, 1657 based on Foata normal form. 92/8188 useless extension candidates. Maximal degree in co-relation 64203. Up to 7076 conditions per place. [2024-06-20 16:57:55,305 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 305 selfloop transitions, 42 changer transitions 0/350 dead transitions. [2024-06-20 16:57:55,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 350 transitions, 5502 flow [2024-06-20 16:57:55,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:57:55,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:57:55,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-20 16:57:55,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-20 16:57:55,307 INFO L175 Difference]: Start difference. First operand has 209 places, 297 transitions, 4280 flow. Second operand 9 states and 159 transitions. [2024-06-20 16:57:55,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 350 transitions, 5502 flow [2024-06-20 16:57:55,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 350 transitions, 5216 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-20 16:57:55,664 INFO L231 Difference]: Finished difference. Result has 210 places, 298 transitions, 4155 flow [2024-06-20 16:57:55,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3994, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4155, PETRI_PLACES=210, PETRI_TRANSITIONS=298} [2024-06-20 16:57:55,665 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 168 predicate places. [2024-06-20 16:57:55,665 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 298 transitions, 4155 flow [2024-06-20 16:57:55,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:57:55,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:57:55,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:57:55,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 16:57:55,665 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:57:55,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:57:55,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1407917005, now seen corresponding path program 4 times [2024-06-20 16:57:55,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:57:55,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853396779] [2024-06-20 16:57:55,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:57:55,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:57:55,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:57:59,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:57:59,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:57:59,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853396779] [2024-06-20 16:57:59,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853396779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:57:59,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:57:59,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:57:59,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709453754] [2024-06-20 16:57:59,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:57:59,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:57:59,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:57:59,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:57:59,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:57:59,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-20 16:57:59,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 298 transitions, 4155 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:57:59,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:57:59,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-20 16:57:59,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:58:02,346 INFO L124 PetriNetUnfolderBase]: 5961/9294 cut-off events. [2024-06-20 16:58:02,346 INFO L125 PetriNetUnfolderBase]: For 436438/436456 co-relation queries the response was YES. [2024-06-20 16:58:02,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72328 conditions, 9294 events. 5961/9294 cut-off events. For 436438/436456 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 57304 event pairs, 1984 based on Foata normal form. 68/9355 useless extension candidates. Maximal degree in co-relation 72226. Up to 7463 conditions per place. [2024-06-20 16:58:02,444 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 324 selfloop transitions, 40 changer transitions 0/367 dead transitions. [2024-06-20 16:58:02,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 367 transitions, 5738 flow [2024-06-20 16:58:02,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:58:02,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:58:02,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-20 16:58:02,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 16:58:02,445 INFO L175 Difference]: Start difference. First operand has 210 places, 298 transitions, 4155 flow. Second operand 10 states and 180 transitions. [2024-06-20 16:58:02,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 367 transitions, 5738 flow [2024-06-20 16:58:03,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 367 transitions, 5578 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-20 16:58:03,153 INFO L231 Difference]: Finished difference. Result has 214 places, 300 transitions, 4234 flow [2024-06-20 16:58:03,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4038, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4234, PETRI_PLACES=214, PETRI_TRANSITIONS=300} [2024-06-20 16:58:03,154 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 172 predicate places. [2024-06-20 16:58:03,154 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 300 transitions, 4234 flow [2024-06-20 16:58:03,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:58:03,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:58:03,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:58:03,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 16:58:03,155 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:58:03,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:58:03,155 INFO L85 PathProgramCache]: Analyzing trace with hash -196830357, now seen corresponding path program 2 times [2024-06-20 16:58:03,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:58:03,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032887835] [2024-06-20 16:58:03,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:58:03,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:58:03,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:58:07,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:58:07,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:58:07,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032887835] [2024-06-20 16:58:07,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032887835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:58:07,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:58:07,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:58:07,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168116995] [2024-06-20 16:58:07,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:58:07,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:58:07,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:58:07,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:58:07,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:58:07,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-20 16:58:07,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 300 transitions, 4234 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:58:07,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:58:07,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-20 16:58:07,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:58:10,233 INFO L124 PetriNetUnfolderBase]: 6053/9440 cut-off events. [2024-06-20 16:58:10,233 INFO L125 PetriNetUnfolderBase]: For 426537/426555 co-relation queries the response was YES. [2024-06-20 16:58:10,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73366 conditions, 9440 events. 6053/9440 cut-off events. For 426537/426555 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 58563 event pairs, 2342 based on Foata normal form. 32/9465 useless extension candidates. Maximal degree in co-relation 73262. Up to 8929 conditions per place. [2024-06-20 16:58:10,333 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 256 selfloop transitions, 90 changer transitions 0/349 dead transitions. [2024-06-20 16:58:10,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 349 transitions, 5395 flow [2024-06-20 16:58:10,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:58:10,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:58:10,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-20 16:58:10,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-20 16:58:10,334 INFO L175 Difference]: Start difference. First operand has 214 places, 300 transitions, 4234 flow. Second operand 10 states and 165 transitions. [2024-06-20 16:58:10,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 349 transitions, 5395 flow [2024-06-20 16:58:10,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 349 transitions, 5257 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-20 16:58:10,924 INFO L231 Difference]: Finished difference. Result has 218 places, 305 transitions, 4444 flow [2024-06-20 16:58:10,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4096, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4444, PETRI_PLACES=218, PETRI_TRANSITIONS=305} [2024-06-20 16:58:10,925 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 176 predicate places. [2024-06-20 16:58:10,925 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 305 transitions, 4444 flow [2024-06-20 16:58:10,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:58:10,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:58:10,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:58:10,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 16:58:10,926 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:58:10,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:58:10,926 INFO L85 PathProgramCache]: Analyzing trace with hash -196822917, now seen corresponding path program 3 times [2024-06-20 16:58:10,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:58:10,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995220586] [2024-06-20 16:58:10,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:58:10,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:58:10,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:58:14,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:58:14,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:58:14,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995220586] [2024-06-20 16:58:14,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995220586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:58:14,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:58:14,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:58:14,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707621826] [2024-06-20 16:58:14,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:58:14,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:58:14,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:58:14,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:58:14,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:58:14,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-20 16:58:14,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 305 transitions, 4444 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:58:14,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:58:14,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-20 16:58:14,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:58:17,540 INFO L124 PetriNetUnfolderBase]: 6209/9692 cut-off events. [2024-06-20 16:58:17,540 INFO L125 PetriNetUnfolderBase]: For 458558/458576 co-relation queries the response was YES. [2024-06-20 16:58:17,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75920 conditions, 9692 events. 6209/9692 cut-off events. For 458558/458576 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 60434 event pairs, 2248 based on Foata normal form. 28/9713 useless extension candidates. Maximal degree in co-relation 75814. Up to 9084 conditions per place. [2024-06-20 16:58:17,649 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 271 selfloop transitions, 83 changer transitions 0/357 dead transitions. [2024-06-20 16:58:17,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 357 transitions, 5653 flow [2024-06-20 16:58:17,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:58:17,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:58:17,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-20 16:58:17,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4073170731707317 [2024-06-20 16:58:17,650 INFO L175 Difference]: Start difference. First operand has 218 places, 305 transitions, 4444 flow. Second operand 10 states and 167 transitions. [2024-06-20 16:58:17,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 357 transitions, 5653 flow [2024-06-20 16:58:18,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 357 transitions, 5428 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-20 16:58:18,325 INFO L231 Difference]: Finished difference. Result has 222 places, 311 transitions, 4545 flow [2024-06-20 16:58:18,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4219, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4545, PETRI_PLACES=222, PETRI_TRANSITIONS=311} [2024-06-20 16:58:18,326 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 180 predicate places. [2024-06-20 16:58:18,326 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 311 transitions, 4545 flow [2024-06-20 16:58:18,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:58:18,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:58:18,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:58:18,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 16:58:18,327 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:58:18,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:58:18,327 INFO L85 PathProgramCache]: Analyzing trace with hash 686979699, now seen corresponding path program 5 times [2024-06-20 16:58:18,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:58:18,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823010619] [2024-06-20 16:58:18,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:58:18,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:58:18,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:58:22,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:58:22,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:58:22,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823010619] [2024-06-20 16:58:22,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823010619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:58:22,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:58:22,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:58:22,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480600476] [2024-06-20 16:58:22,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:58:22,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:58:22,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:58:22,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:58:22,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:58:22,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-20 16:58:22,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 311 transitions, 4545 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:58:22,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:58:22,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-20 16:58:22,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:58:26,456 INFO L124 PetriNetUnfolderBase]: 6767/10640 cut-off events. [2024-06-20 16:58:26,457 INFO L125 PetriNetUnfolderBase]: For 595063/595081 co-relation queries the response was YES. [2024-06-20 16:58:26,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83670 conditions, 10640 events. 6767/10640 cut-off events. For 595063/595081 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 68158 event pairs, 2542 based on Foata normal form. 146/10779 useless extension candidates. Maximal degree in co-relation 83562. Up to 8731 conditions per place. [2024-06-20 16:58:26,578 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 255 selfloop transitions, 133 changer transitions 0/391 dead transitions. [2024-06-20 16:58:26,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 391 transitions, 6273 flow [2024-06-20 16:58:26,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 16:58:26,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 16:58:26,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 210 transitions. [2024-06-20 16:58:26,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-20 16:58:26,580 INFO L175 Difference]: Start difference. First operand has 222 places, 311 transitions, 4545 flow. Second operand 12 states and 210 transitions. [2024-06-20 16:58:26,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 391 transitions, 6273 flow [2024-06-20 16:58:27,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 391 transitions, 6028 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-20 16:58:27,468 INFO L231 Difference]: Finished difference. Result has 229 places, 323 transitions, 4921 flow [2024-06-20 16:58:27,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4300, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4921, PETRI_PLACES=229, PETRI_TRANSITIONS=323} [2024-06-20 16:58:27,468 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 187 predicate places. [2024-06-20 16:58:27,468 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 323 transitions, 4921 flow [2024-06-20 16:58:27,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:58:27,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:58:27,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:58:27,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 16:58:27,469 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:58:27,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:58:27,469 INFO L85 PathProgramCache]: Analyzing trace with hash -197038119, now seen corresponding path program 6 times [2024-06-20 16:58:27,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:58:27,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177913032] [2024-06-20 16:58:27,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:58:27,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:58:27,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:58:30,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:58:30,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:58:30,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177913032] [2024-06-20 16:58:30,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177913032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:58:30,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:58:30,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:58:30,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600068099] [2024-06-20 16:58:30,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:58:30,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:58:30,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:58:30,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:58:30,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:58:30,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-20 16:58:30,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 323 transitions, 4921 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:58:30,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:58:30,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-20 16:58:30,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:58:33,914 INFO L124 PetriNetUnfolderBase]: 7015/11064 cut-off events. [2024-06-20 16:58:33,914 INFO L125 PetriNetUnfolderBase]: For 622311/622329 co-relation queries the response was YES. [2024-06-20 16:58:34,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87827 conditions, 11064 events. 7015/11064 cut-off events. For 622311/622329 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 71675 event pairs, 2735 based on Foata normal form. 76/11133 useless extension candidates. Maximal degree in co-relation 87716. Up to 10160 conditions per place. [2024-06-20 16:58:34,055 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 304 selfloop transitions, 77 changer transitions 0/384 dead transitions. [2024-06-20 16:58:34,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 384 transitions, 6293 flow [2024-06-20 16:58:34,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 16:58:34,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 16:58:34,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 210 transitions. [2024-06-20 16:58:34,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39399624765478425 [2024-06-20 16:58:34,056 INFO L175 Difference]: Start difference. First operand has 229 places, 323 transitions, 4921 flow. Second operand 13 states and 210 transitions. [2024-06-20 16:58:34,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 384 transitions, 6293 flow [2024-06-20 16:58:34,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 384 transitions, 6077 flow, removed 66 selfloop flow, removed 5 redundant places. [2024-06-20 16:58:34,951 INFO L231 Difference]: Finished difference. Result has 237 places, 324 transitions, 4941 flow [2024-06-20 16:58:34,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4705, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4941, PETRI_PLACES=237, PETRI_TRANSITIONS=324} [2024-06-20 16:58:34,952 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 195 predicate places. [2024-06-20 16:58:34,952 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 324 transitions, 4941 flow [2024-06-20 16:58:34,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:58:34,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:58:34,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:58:34,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 16:58:34,953 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:58:34,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:58:34,953 INFO L85 PathProgramCache]: Analyzing trace with hash 686975979, now seen corresponding path program 7 times [2024-06-20 16:58:34,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:58:34,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456854078] [2024-06-20 16:58:34,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:58:34,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:58:34,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:58:38,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:58:38,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:58:38,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456854078] [2024-06-20 16:58:38,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456854078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:58:38,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:58:38,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:58:38,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433844267] [2024-06-20 16:58:38,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:58:38,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:58:38,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:58:38,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:58:38,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:58:38,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-20 16:58:38,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 324 transitions, 4941 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:58:38,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:58:38,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-20 16:58:38,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:58:43,173 INFO L124 PetriNetUnfolderBase]: 7874/12451 cut-off events. [2024-06-20 16:58:43,173 INFO L125 PetriNetUnfolderBase]: For 730745/730763 co-relation queries the response was YES. [2024-06-20 16:58:43,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99320 conditions, 12451 events. 7874/12451 cut-off events. For 730745/730763 co-relation queries the response was YES. Maximal size of possible extension queue 612. Compared 82759 event pairs, 2516 based on Foata normal form. 100/12544 useless extension candidates. Maximal degree in co-relation 99207. Up to 7450 conditions per place. [2024-06-20 16:58:43,298 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 283 selfloop transitions, 160 changer transitions 1/447 dead transitions. [2024-06-20 16:58:43,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 447 transitions, 7673 flow [2024-06-20 16:58:43,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-20 16:58:43,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-20 16:58:43,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 257 transitions. [2024-06-20 16:58:43,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44773519163763065 [2024-06-20 16:58:43,299 INFO L175 Difference]: Start difference. First operand has 237 places, 324 transitions, 4941 flow. Second operand 14 states and 257 transitions. [2024-06-20 16:58:43,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 447 transitions, 7673 flow [2024-06-20 16:58:44,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 447 transitions, 7479 flow, removed 30 selfloop flow, removed 9 redundant places. [2024-06-20 16:58:44,485 INFO L231 Difference]: Finished difference. Result has 246 places, 344 transitions, 5550 flow [2024-06-20 16:58:44,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4747, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5550, PETRI_PLACES=246, PETRI_TRANSITIONS=344} [2024-06-20 16:58:44,486 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 204 predicate places. [2024-06-20 16:58:44,487 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 344 transitions, 5550 flow [2024-06-20 16:58:44,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:58:44,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:58:44,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:58:44,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 16:58:44,487 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:58:44,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:58:44,488 INFO L85 PathProgramCache]: Analyzing trace with hash 243080218, now seen corresponding path program 1 times [2024-06-20 16:58:44,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:58:44,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932538096] [2024-06-20 16:58:44,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:58:44,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:58:44,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:58:45,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:58:45,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:58:45,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932538096] [2024-06-20 16:58:45,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932538096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:58:45,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:58:45,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:58:45,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891666528] [2024-06-20 16:58:45,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:58:45,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:58:45,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:58:45,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:58:45,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:58:45,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-20 16:58:45,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 344 transitions, 5550 flow. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:58:45,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:58:45,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-20 16:58:45,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:58:49,180 INFO L124 PetriNetUnfolderBase]: 7868/12443 cut-off events. [2024-06-20 16:58:49,180 INFO L125 PetriNetUnfolderBase]: For 723007/723028 co-relation queries the response was YES. [2024-06-20 16:58:49,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104695 conditions, 12443 events. 7868/12443 cut-off events. For 723007/723028 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 82630 event pairs, 3289 based on Foata normal form. 16/12452 useless extension candidates. Maximal degree in co-relation 104577. Up to 12384 conditions per place. [2024-06-20 16:58:49,344 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 332 selfloop transitions, 20 changer transitions 0/355 dead transitions. [2024-06-20 16:58:49,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 355 transitions, 6288 flow [2024-06-20 16:58:49,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:58:49,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:58:49,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 78 transitions. [2024-06-20 16:58:49,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3804878048780488 [2024-06-20 16:58:49,345 INFO L175 Difference]: Start difference. First operand has 246 places, 344 transitions, 5550 flow. Second operand 5 states and 78 transitions. [2024-06-20 16:58:49,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 355 transitions, 6288 flow [2024-06-20 16:58:50,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 355 transitions, 5974 flow, removed 76 selfloop flow, removed 7 redundant places. [2024-06-20 16:58:50,686 INFO L231 Difference]: Finished difference. Result has 244 places, 344 transitions, 5291 flow [2024-06-20 16:58:50,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5236, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5291, PETRI_PLACES=244, PETRI_TRANSITIONS=344} [2024-06-20 16:58:50,687 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 202 predicate places. [2024-06-20 16:58:50,687 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 344 transitions, 5291 flow [2024-06-20 16:58:50,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:58:50,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:58:50,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:58:50,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 16:58:50,688 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:58:50,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:58:50,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1728927856, now seen corresponding path program 1 times [2024-06-20 16:58:50,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:58:50,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045853377] [2024-06-20 16:58:50,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:58:50,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:58:50,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:58:54,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:58:54,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:58:54,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045853377] [2024-06-20 16:58:54,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045853377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:58:54,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:58:54,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:58:54,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866590264] [2024-06-20 16:58:54,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:58:54,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:58:54,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:58:54,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:58:54,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:58:54,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-20 16:58:54,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 344 transitions, 5291 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:58:54,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:58:54,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-20 16:58:54,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:58:58,060 INFO L124 PetriNetUnfolderBase]: 7884/12466 cut-off events. [2024-06-20 16:58:58,060 INFO L125 PetriNetUnfolderBase]: For 727473/727494 co-relation queries the response was YES. [2024-06-20 16:58:58,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103738 conditions, 12466 events. 7884/12466 cut-off events. For 727473/727494 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 82989 event pairs, 3238 based on Foata normal form. 19/12478 useless extension candidates. Maximal degree in co-relation 103618. Up to 11853 conditions per place. [2024-06-20 16:58:58,190 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 290 selfloop transitions, 103 changer transitions 0/396 dead transitions. [2024-06-20 16:58:58,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 396 transitions, 6727 flow [2024-06-20 16:58:58,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:58:58,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:58:58,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-20 16:58:58,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-20 16:58:58,192 INFO L175 Difference]: Start difference. First operand has 244 places, 344 transitions, 5291 flow. Second operand 9 states and 160 transitions. [2024-06-20 16:58:58,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 396 transitions, 6727 flow [2024-06-20 16:58:59,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 396 transitions, 6673 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-20 16:58:59,287 INFO L231 Difference]: Finished difference. Result has 248 places, 348 transitions, 5607 flow [2024-06-20 16:58:59,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5243, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5607, PETRI_PLACES=248, PETRI_TRANSITIONS=348} [2024-06-20 16:58:59,288 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 206 predicate places. [2024-06-20 16:58:59,288 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 348 transitions, 5607 flow [2024-06-20 16:58:59,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:58:59,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:58:59,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:58:59,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 16:58:59,288 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:58:59,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:58:59,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1472225753, now seen corresponding path program 4 times [2024-06-20 16:58:59,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:58:59,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26798947] [2024-06-20 16:58:59,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:58:59,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:58:59,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:59:02,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:59:02,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:59:02,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26798947] [2024-06-20 16:59:02,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26798947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:59:02,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:59:02,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:59:02,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247711188] [2024-06-20 16:59:02,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:59:02,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:59:02,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:59:02,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:59:02,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:59:02,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-20 16:59:02,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 348 transitions, 5607 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:59:02,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:59:02,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-20 16:59:02,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:59:06,815 INFO L124 PetriNetUnfolderBase]: 7943/12560 cut-off events. [2024-06-20 16:59:06,815 INFO L125 PetriNetUnfolderBase]: For 750270/750291 co-relation queries the response was YES. [2024-06-20 16:59:06,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106841 conditions, 12560 events. 7943/12560 cut-off events. For 750270/750291 co-relation queries the response was YES. Maximal size of possible extension queue 623. Compared 83742 event pairs, 3249 based on Foata normal form. 30/12583 useless extension candidates. Maximal degree in co-relation 106721. Up to 12110 conditions per place. [2024-06-20 16:59:06,947 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 334 selfloop transitions, 72 changer transitions 0/409 dead transitions. [2024-06-20 16:59:06,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 409 transitions, 7183 flow [2024-06-20 16:59:06,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:59:06,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:59:06,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-20 16:59:06,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-20 16:59:06,948 INFO L175 Difference]: Start difference. First operand has 248 places, 348 transitions, 5607 flow. Second operand 9 states and 158 transitions. [2024-06-20 16:59:06,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 409 transitions, 7183 flow [2024-06-20 16:59:08,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 409 transitions, 6855 flow, removed 57 selfloop flow, removed 7 redundant places. [2024-06-20 16:59:08,091 INFO L231 Difference]: Finished difference. Result has 254 places, 365 transitions, 5846 flow [2024-06-20 16:59:08,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5299, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5846, PETRI_PLACES=254, PETRI_TRANSITIONS=365} [2024-06-20 16:59:08,091 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 212 predicate places. [2024-06-20 16:59:08,091 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 365 transitions, 5846 flow [2024-06-20 16:59:08,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:59:08,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:59:08,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:59:08,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 16:59:08,092 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:59:08,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:59:08,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1472219801, now seen corresponding path program 8 times [2024-06-20 16:59:08,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:59:08,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155076813] [2024-06-20 16:59:08,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:59:08,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:59:08,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:59:12,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:59:12,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:59:12,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155076813] [2024-06-20 16:59:12,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155076813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:59:12,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:59:12,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:59:12,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908292681] [2024-06-20 16:59:12,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:59:12,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:59:12,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:59:12,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:59:12,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:59:12,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-20 16:59:12,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 365 transitions, 5846 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:59:12,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:59:12,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-20 16:59:12,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:59:17,067 INFO L124 PetriNetUnfolderBase]: 8212/13019 cut-off events. [2024-06-20 16:59:17,067 INFO L125 PetriNetUnfolderBase]: For 852325/852346 co-relation queries the response was YES. [2024-06-20 16:59:17,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110888 conditions, 13019 events. 8212/13019 cut-off events. For 852325/852346 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 87666 event pairs, 3300 based on Foata normal form. 88/13100 useless extension candidates. Maximal degree in co-relation 110763. Up to 11628 conditions per place. [2024-06-20 16:59:17,215 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 306 selfloop transitions, 116 changer transitions 0/425 dead transitions. [2024-06-20 16:59:17,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 425 transitions, 7384 flow [2024-06-20 16:59:17,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:59:17,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:59:17,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-20 16:59:17,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44146341463414634 [2024-06-20 16:59:17,216 INFO L175 Difference]: Start difference. First operand has 254 places, 365 transitions, 5846 flow. Second operand 10 states and 181 transitions. [2024-06-20 16:59:17,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 425 transitions, 7384 flow [2024-06-20 16:59:18,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 425 transitions, 7268 flow, removed 57 selfloop flow, removed 1 redundant places. [2024-06-20 16:59:18,550 INFO L231 Difference]: Finished difference. Result has 263 places, 366 transitions, 6065 flow [2024-06-20 16:59:18,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5730, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6065, PETRI_PLACES=263, PETRI_TRANSITIONS=366} [2024-06-20 16:59:18,551 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 221 predicate places. [2024-06-20 16:59:18,551 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 366 transitions, 6065 flow [2024-06-20 16:59:18,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:59:18,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:59:18,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:59:18,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 16:59:18,551 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:59:18,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:59:18,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1738132283, now seen corresponding path program 5 times [2024-06-20 16:59:18,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:59:18,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683574258] [2024-06-20 16:59:18,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:59:18,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:59:18,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:59:21,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:59:21,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:59:21,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683574258] [2024-06-20 16:59:21,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683574258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:59:21,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:59:21,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:59:21,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993434953] [2024-06-20 16:59:21,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:59:21,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:59:21,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:59:21,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:59:21,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:59:21,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-20 16:59:21,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 366 transitions, 6065 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:59:21,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:59:21,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-20 16:59:21,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:59:26,414 INFO L124 PetriNetUnfolderBase]: 8452/13403 cut-off events. [2024-06-20 16:59:26,414 INFO L125 PetriNetUnfolderBase]: For 840894/840915 co-relation queries the response was YES. [2024-06-20 16:59:26,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114767 conditions, 13403 events. 8452/13403 cut-off events. For 840894/840915 co-relation queries the response was YES. Maximal size of possible extension queue 683. Compared 90822 event pairs, 3182 based on Foata normal form. 38/13434 useless extension candidates. Maximal degree in co-relation 114639. Up to 12339 conditions per place. [2024-06-20 16:59:26,578 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 327 selfloop transitions, 103 changer transitions 0/433 dead transitions. [2024-06-20 16:59:26,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 433 transitions, 7886 flow [2024-06-20 16:59:26,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:59:26,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:59:26,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-20 16:59:26,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-20 16:59:26,579 INFO L175 Difference]: Start difference. First operand has 263 places, 366 transitions, 6065 flow. Second operand 9 states and 168 transitions. [2024-06-20 16:59:26,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 433 transitions, 7886 flow [2024-06-20 16:59:28,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 433 transitions, 7619 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-20 16:59:28,420 INFO L231 Difference]: Finished difference. Result has 266 places, 376 transitions, 6289 flow [2024-06-20 16:59:28,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5798, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6289, PETRI_PLACES=266, PETRI_TRANSITIONS=376} [2024-06-20 16:59:28,420 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 224 predicate places. [2024-06-20 16:59:28,420 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 376 transitions, 6289 flow [2024-06-20 16:59:28,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:59:28,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:59:28,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:59:28,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 16:59:28,421 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:59:28,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:59:28,421 INFO L85 PathProgramCache]: Analyzing trace with hash -324865417, now seen corresponding path program 6 times [2024-06-20 16:59:28,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:59:28,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570675347] [2024-06-20 16:59:28,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:59:28,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:59:28,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:59:31,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:59:31,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:59:31,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570675347] [2024-06-20 16:59:31,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570675347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:59:31,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:59:31,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:59:31,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062656723] [2024-06-20 16:59:31,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:59:31,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:59:31,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:59:31,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:59:31,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:59:31,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-20 16:59:31,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 376 transitions, 6289 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:59:31,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:59:31,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-20 16:59:31,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand