./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe001_power.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe001_power.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe001_power.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/safe001_power.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 17:14:18,138 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 17:14:18,184 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 17:14:18,186 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 17:14:18,187 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 17:14:18,207 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 17:14:18,207 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 17:14:18,207 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 17:14:18,208 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 17:14:18,208 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 17:14:18,208 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 17:14:18,208 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 17:14:18,209 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 17:14:18,209 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 17:14:18,209 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 17:14:18,210 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 17:14:18,210 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 17:14:18,210 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 17:14:18,210 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 17:14:18,210 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 17:14:18,211 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 17:14:18,211 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 17:14:18,211 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 17:14:18,212 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 17:14:18,212 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 17:14:18,212 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 17:14:18,212 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 17:14:18,212 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 17:14:18,215 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 17:14:18,215 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 17:14:18,215 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 17:14:18,216 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 17:14:18,221 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:14:18,221 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 17:14:18,222 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 17:14:18,222 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 17:14:18,222 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 17:14:18,222 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 17:14:18,222 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 17:14:18,222 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 17:14:18,223 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 17:14:18,223 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 17:14:18,223 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 17:14:18,223 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 17:14:18,409 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 17:14:18,428 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 17:14:18,431 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 17:14:18,432 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 17:14:18,432 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 17:14:18,433 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe001_power.oepc.i [2024-06-21 17:14:19,430 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 17:14:19,630 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 17:14:19,631 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe001_power.oepc.i [2024-06-21 17:14:19,650 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b7b53a30/c94bd75a61a641038e8876d8e45fdbf1/FLAGc39622e8e [2024-06-21 17:14:19,660 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b7b53a30/c94bd75a61a641038e8876d8e45fdbf1 [2024-06-21 17:14:19,662 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 17:14:19,662 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 17:14:19,662 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe001_power.oepc.yml/witness.yml [2024-06-21 17:14:19,830 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 17:14:19,831 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 17:14:19,832 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 17:14:19,832 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 17:14:19,835 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 17:14:19,836 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:14:19" (1/2) ... [2024-06-21 17:14:19,837 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73977406 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:14:19, skipping insertion in model container [2024-06-21 17:14:19,837 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:14:19" (1/2) ... [2024-06-21 17:14:19,838 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3f29b350 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:14:19, skipping insertion in model container [2024-06-21 17:14:19,839 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:14:19" (2/2) ... [2024-06-21 17:14:19,839 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73977406 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:14:19, skipping insertion in model container [2024-06-21 17:14:19,839 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:14:19" (2/2) ... [2024-06-21 17:14:19,839 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 17:14:19,943 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 17:14:19,944 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] (((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-21 17:14:19,944 INFO L97 edCorrectnessWitness]: Location invariant before [L857-L857] (((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-21 17:14:19,944 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] (((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-21 17:14:19,945 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 17:14:19,945 INFO L106 edCorrectnessWitness]: ghost_update [L852-L852] multithreaded = 1; [2024-06-21 17:14:19,979 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 17:14:20,302 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:14:20,315 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 17:14:20,411 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:14:20,451 INFO L206 MainTranslator]: Completed translation [2024-06-21 17:14:20,451 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:14:20 WrapperNode [2024-06-21 17:14:20,451 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 17:14:20,452 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 17:14:20,452 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 17:14:20,453 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 17:14:20,457 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 21.06 05:14:20" (1/1) ... [2024-06-21 17:14:20,486 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 21.06 05:14:20" (1/1) ... [2024-06-21 17:14:20,520 INFO L138 Inliner]: procedures = 175, calls = 91, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 228 [2024-06-21 17:14:20,520 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 17:14:20,521 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 17:14:20,521 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 17:14:20,521 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 17:14:20,529 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:14:20" (1/1) ... [2024-06-21 17:14:20,530 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:14:20" (1/1) ... [2024-06-21 17:14:20,550 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:14:20" (1/1) ... [2024-06-21 17:14:20,573 INFO L175 MemorySlicer]: Split 50 memory accesses to 2 slices as follows [2, 48]. 96 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 11 writes are split as follows [0, 11]. [2024-06-21 17:14:20,573 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:14:20" (1/1) ... [2024-06-21 17:14:20,574 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:14:20" (1/1) ... [2024-06-21 17:14:20,586 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:14:20" (1/1) ... [2024-06-21 17:14:20,588 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:14:20" (1/1) ... [2024-06-21 17:14:20,591 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:14:20" (1/1) ... [2024-06-21 17:14:20,593 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:14:20" (1/1) ... [2024-06-21 17:14:20,597 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 17:14:20,597 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 17:14:20,597 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 17:14:20,598 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 17:14:20,598 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:14:20" (1/1) ... [2024-06-21 17:14:20,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:14:20,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 17:14:20,649 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 17:14:20,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 17:14:20,680 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-21 17:14:20,681 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-21 17:14:20,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-21 17:14:20,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-21 17:14:20,681 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 17:14:20,681 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 17:14:20,682 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 17:14:20,682 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 17:14:20,682 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 17:14:20,682 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 17:14:20,682 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 17:14:20,682 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 17:14:20,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 17:14:20,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-21 17:14:20,683 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 17:14:20,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 17:14:20,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 17:14:20,686 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 17:14:20,818 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 17:14:20,819 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 17:14:21,264 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 17:14:21,264 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 17:14:21,562 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 17:14:21,563 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 17:14:21,563 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:14:21 BoogieIcfgContainer [2024-06-21 17:14:21,563 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 17:14:21,566 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 17:14:21,566 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 17:14:21,569 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 17:14:21,569 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 05:14:19" (1/4) ... [2024-06-21 17:14:21,569 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@337e192e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 05:14:21, skipping insertion in model container [2024-06-21 17:14:21,570 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:14:19" (2/4) ... [2024-06-21 17:14:21,570 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@337e192e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 05:14:21, skipping insertion in model container [2024-06-21 17:14:21,570 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:14:20" (3/4) ... [2024-06-21 17:14:21,570 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@337e192e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 05:14:21, skipping insertion in model container [2024-06-21 17:14:21,570 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:14:21" (4/4) ... [2024-06-21 17:14:21,571 INFO L112 eAbstractionObserver]: Analyzing ICFG safe001_power.oepc.i [2024-06-21 17:14:21,584 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 17:14:21,584 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 17:14:21,585 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 17:14:21,644 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 17:14:21,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 17:14:21,748 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-21 17:14:21,749 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:14:21,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 56 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 17:14:21,751 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 17:14:21,754 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-21 17:14:21,765 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 17:14:21,787 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;@3a3d67ff, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 17:14:21,788 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 17:14:21,793 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 17:14:21,793 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-21 17:14:21,793 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:14:21,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:14:21,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 17:14:21,794 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:14:21,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:14:21,801 INFO L85 PathProgramCache]: Analyzing trace with hash 898592787, now seen corresponding path program 1 times [2024-06-21 17:14:21,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:14:21,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121274627] [2024-06-21 17:14:21,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:14:21,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:14:22,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:14:23,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:14:23,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:14:23,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121274627] [2024-06-21 17:14:23,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121274627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:14:23,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:14:23,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 17:14:23,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355520261] [2024-06-21 17:14:23,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:14:23,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 17:14:23,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:14:23,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 17:14:23,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 17:14:23,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:14:23,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 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) [2024-06-21 17:14:23,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:14:23,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:14:23,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:14:24,137 INFO L124 PetriNetUnfolderBase]: 1409/2137 cut-off events. [2024-06-21 17:14:24,137 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-21 17:14:24,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4335 conditions, 2137 events. 1409/2137 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10054 event pairs, 873 based on Foata normal form. 2/2104 useless extension candidates. Maximal degree in co-relation 4323. Up to 2108 conditions per place. [2024-06-21 17:14:24,149 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 37 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-06-21 17:14:24,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 46 transitions, 189 flow [2024-06-21 17:14:24,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 17:14:24,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 17:14:24,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2024-06-21 17:14:24,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396825396825397 [2024-06-21 17:14:24,159 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 68 transitions. [2024-06-21 17:14:24,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 46 transitions, 189 flow [2024-06-21 17:14:24,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 46 transitions, 184 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 17:14:24,162 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-21 17:14:24,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-21 17:14:24,166 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-21 17:14:24,166 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-21 17:14:24,166 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) [2024-06-21 17:14:24,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:14:24,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:14:24,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 17:14:24,167 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:14:24,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:14:24,167 INFO L85 PathProgramCache]: Analyzing trace with hash 259287570, now seen corresponding path program 1 times [2024-06-21 17:14:24,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:14:24,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987918311] [2024-06-21 17:14:24,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:14:24,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:14:24,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:14:26,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:14:26,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:14:26,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987918311] [2024-06-21 17:14:26,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987918311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:14:26,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:14:26,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 17:14:26,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151435520] [2024-06-21 17:14:26,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:14:26,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 17:14:26,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:14:26,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 17:14:26,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 17:14:26,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:14:26,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:26,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:14:26,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:14:26,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:14:26,934 INFO L124 PetriNetUnfolderBase]: 1400/2124 cut-off events. [2024-06-21 17:14:26,935 INFO L125 PetriNetUnfolderBase]: For 387/387 co-relation queries the response was YES. [2024-06-21 17:14:26,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4874 conditions, 2124 events. 1400/2124 cut-off events. For 387/387 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10042 event pairs, 726 based on Foata normal form. 4/2127 useless extension candidates. Maximal degree in co-relation 4862. Up to 2071 conditions per place. [2024-06-21 17:14:26,945 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 47 selfloop transitions, 7 changer transitions 0/59 dead transitions. [2024-06-21 17:14:26,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 59 transitions, 268 flow [2024-06-21 17:14:26,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 17:14:26,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 17:14:26,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 89 transitions. [2024-06-21 17:14:26,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5297619047619048 [2024-06-21 17:14:26,947 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 89 transitions. [2024-06-21 17:14:26,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 59 transitions, 268 flow [2024-06-21 17:14:26,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 59 transitions, 264 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 17:14:26,948 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-21 17:14:26,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-21 17:14:26,949 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-21 17:14:26,949 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-21 17:14:26,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:26,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:14:26,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:14:26,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 17:14:26,950 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:14:26,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:14:26,951 INFO L85 PathProgramCache]: Analyzing trace with hash -552018431, now seen corresponding path program 1 times [2024-06-21 17:14:26,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:14:26,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881028179] [2024-06-21 17:14:26,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:14:26,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:14:26,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:14:29,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:14:29,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:14:29,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881028179] [2024-06-21 17:14:29,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881028179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:14:29,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:14:29,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 17:14:29,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126241695] [2024-06-21 17:14:29,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:14:29,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 17:14:29,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:14:29,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 17:14:29,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 17:14:29,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:14:29,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:29,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:14:29,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:14:29,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:14:29,856 INFO L124 PetriNetUnfolderBase]: 1414/2157 cut-off events. [2024-06-21 17:14:29,856 INFO L125 PetriNetUnfolderBase]: For 1112/1112 co-relation queries the response was YES. [2024-06-21 17:14:29,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5477 conditions, 2157 events. 1414/2157 cut-off events. For 1112/1112 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10309 event pairs, 512 based on Foata normal form. 7/2163 useless extension candidates. Maximal degree in co-relation 5463. Up to 1977 conditions per place. [2024-06-21 17:14:29,867 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 63 selfloop transitions, 16 changer transitions 0/84 dead transitions. [2024-06-21 17:14:29,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 84 transitions, 434 flow [2024-06-21 17:14:29,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:14:29,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:14:29,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-21 17:14:29,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5619047619047619 [2024-06-21 17:14:29,873 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 5 states and 118 transitions. [2024-06-21 17:14:29,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 84 transitions, 434 flow [2024-06-21 17:14:29,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 84 transitions, 420 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 17:14:29,876 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 237 flow [2024-06-21 17:14:29,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=237, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2024-06-21 17:14:29,877 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-21 17:14:29,878 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 237 flow [2024-06-21 17:14:29,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:29,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:14:29,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:14:29,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 17:14:29,878 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)] === [2024-06-21 17:14:29,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:14:29,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1225622780, now seen corresponding path program 1 times [2024-06-21 17:14:29,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:14:29,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344667981] [2024-06-21 17:14:29,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:14:29,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:14:29,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:14:32,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:14:32,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:14:32,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344667981] [2024-06-21 17:14:32,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344667981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:14:32,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:14:32,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:14:32,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700004100] [2024-06-21 17:14:32,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:14:32,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:14:32,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:14:32,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:14:32,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:14:32,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 17:14:32,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 237 flow. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:32,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:14:32,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 17:14:32,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:14:33,415 INFO L124 PetriNetUnfolderBase]: 1435/2192 cut-off events. [2024-06-21 17:14:33,415 INFO L125 PetriNetUnfolderBase]: For 2633/2633 co-relation queries the response was YES. [2024-06-21 17:14:33,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6591 conditions, 2192 events. 1435/2192 cut-off events. For 2633/2633 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10523 event pairs, 349 based on Foata normal form. 14/2205 useless extension candidates. Maximal degree in co-relation 6574. Up to 1924 conditions per place. [2024-06-21 17:14:33,428 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 69 selfloop transitions, 19 changer transitions 0/93 dead transitions. [2024-06-21 17:14:33,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 93 transitions, 545 flow [2024-06-21 17:14:33,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:14:33,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:14:33,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-21 17:14:33,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-21 17:14:33,430 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 237 flow. Second operand 6 states and 135 transitions. [2024-06-21 17:14:33,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 93 transitions, 545 flow [2024-06-21 17:14:33,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 93 transitions, 537 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-21 17:14:33,437 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 293 flow [2024-06-21 17:14:33,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=293, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2024-06-21 17:14:33,438 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 13 predicate places. [2024-06-21 17:14:33,439 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 293 flow [2024-06-21 17:14:33,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:33,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:14:33,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:14:33,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 17:14:33,439 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:14:33,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:14:33,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1990223194, now seen corresponding path program 1 times [2024-06-21 17:14:33,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:14:33,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375422382] [2024-06-21 17:14:33,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:14:33,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:14:33,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:14:34,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:14:34,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:14:34,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375422382] [2024-06-21 17:14:34,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375422382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:14:34,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:14:34,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:14:34,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42583787] [2024-06-21 17:14:34,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:14:34,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:14:34,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:14:34,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:14:34,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:14:34,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:14:34,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 293 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) [2024-06-21 17:14:34,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:14:34,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:14:34,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:14:35,491 INFO L124 PetriNetUnfolderBase]: 1427/2180 cut-off events. [2024-06-21 17:14:35,491 INFO L125 PetriNetUnfolderBase]: For 3892/3892 co-relation queries the response was YES. [2024-06-21 17:14:35,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7157 conditions, 2180 events. 1427/2180 cut-off events. For 3892/3892 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10472 event pairs, 503 based on Foata normal form. 3/2182 useless extension candidates. Maximal degree in co-relation 7136. Up to 2124 conditions per place. [2024-06-21 17:14:35,503 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 56 selfloop transitions, 8 changer transitions 0/68 dead transitions. [2024-06-21 17:14:35,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 68 transitions, 459 flow [2024-06-21 17:14:35,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:14:35,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:14:35,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2024-06-21 17:14:35,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-21 17:14:35,504 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 293 flow. Second operand 5 states and 87 transitions. [2024-06-21 17:14:35,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 68 transitions, 459 flow [2024-06-21 17:14:35,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 68 transitions, 409 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 17:14:35,508 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 267 flow [2024-06-21 17:14:35,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=267, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2024-06-21 17:14:35,508 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-21 17:14:35,509 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 267 flow [2024-06-21 17:14:35,509 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) [2024-06-21 17:14:35,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:14:35,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:14:35,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 17:14:35,509 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:14:35,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:14:35,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1605229223, now seen corresponding path program 1 times [2024-06-21 17:14:35,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:14:35,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330506397] [2024-06-21 17:14:35,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:14:35,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:14:35,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:14:36,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:14:36,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:14:36,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330506397] [2024-06-21 17:14:36,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330506397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:14:36,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:14:36,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:14:36,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338090815] [2024-06-21 17:14:36,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:14:36,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:14:36,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:14:36,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:14:36,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:14:36,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:14:36,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 267 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 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) [2024-06-21 17:14:36,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:14:36,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:14:36,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:14:38,010 INFO L124 PetriNetUnfolderBase]: 1417/2162 cut-off events. [2024-06-21 17:14:38,010 INFO L125 PetriNetUnfolderBase]: For 4523/4523 co-relation queries the response was YES. [2024-06-21 17:14:38,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7079 conditions, 2162 events. 1417/2162 cut-off events. For 4523/4523 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10136 event pairs, 551 based on Foata normal form. 4/2165 useless extension candidates. Maximal degree in co-relation 7056. Up to 2096 conditions per place. [2024-06-21 17:14:38,023 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 66 selfloop transitions, 11 changer transitions 0/81 dead transitions. [2024-06-21 17:14:38,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 81 transitions, 521 flow [2024-06-21 17:14:38,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:14:38,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:14:38,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-21 17:14:38,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-21 17:14:38,024 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 267 flow. Second operand 6 states and 101 transitions. [2024-06-21 17:14:38,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 81 transitions, 521 flow [2024-06-21 17:14:38,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 81 transitions, 489 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 17:14:38,028 INFO L231 Difference]: Finished difference. Result has 61 places, 61 transitions, 339 flow [2024-06-21 17:14:38,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=339, PETRI_PLACES=61, PETRI_TRANSITIONS=61} [2024-06-21 17:14:38,029 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 18 predicate places. [2024-06-21 17:14:38,029 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 61 transitions, 339 flow [2024-06-21 17:14:38,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 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) [2024-06-21 17:14:38,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:14:38,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:14:38,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 17:14:38,030 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:14:38,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:14:38,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1771781251, now seen corresponding path program 1 times [2024-06-21 17:14:38,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:14:38,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282626026] [2024-06-21 17:14:38,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:14:38,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:14:38,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:14:40,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:14:40,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:14:40,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282626026] [2024-06-21 17:14:40,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282626026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:14:40,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:14:40,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:14:40,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422101087] [2024-06-21 17:14:40,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:14:40,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:14:40,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:14:40,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:14:40,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:14:40,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:14:40,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 61 transitions, 339 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 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) [2024-06-21 17:14:40,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:14:40,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:14:40,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:14:41,105 INFO L124 PetriNetUnfolderBase]: 1427/2178 cut-off events. [2024-06-21 17:14:41,105 INFO L125 PetriNetUnfolderBase]: For 5853/5855 co-relation queries the response was YES. [2024-06-21 17:14:41,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7681 conditions, 2178 events. 1427/2178 cut-off events. For 5853/5855 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10345 event pairs, 496 based on Foata normal form. 8/2185 useless extension candidates. Maximal degree in co-relation 7656. Up to 1997 conditions per place. [2024-06-21 17:14:41,120 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 65 selfloop transitions, 22 changer transitions 0/91 dead transitions. [2024-06-21 17:14:41,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 91 transitions, 627 flow [2024-06-21 17:14:41,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:14:41,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:14:41,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-21 17:14:41,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44841269841269843 [2024-06-21 17:14:41,123 INFO L175 Difference]: Start difference. First operand has 61 places, 61 transitions, 339 flow. Second operand 6 states and 113 transitions. [2024-06-21 17:14:41,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 91 transitions, 627 flow [2024-06-21 17:14:41,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 91 transitions, 621 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-21 17:14:41,128 INFO L231 Difference]: Finished difference. Result has 66 places, 64 transitions, 411 flow [2024-06-21 17:14:41,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=411, PETRI_PLACES=66, PETRI_TRANSITIONS=64} [2024-06-21 17:14:41,130 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-06-21 17:14:41,130 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 64 transitions, 411 flow [2024-06-21 17:14:41,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 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) [2024-06-21 17:14:41,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:14:41,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:14:41,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 17:14:41,131 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:14:41,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:14:41,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1344004635, now seen corresponding path program 2 times [2024-06-21 17:14:41,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:14:41,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900664822] [2024-06-21 17:14:41,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:14:41,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:14:41,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:14:43,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:14:43,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:14:43,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900664822] [2024-06-21 17:14:43,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900664822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:14:43,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:14:43,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:14:43,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504693376] [2024-06-21 17:14:43,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:14:43,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:14:43,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:14:43,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:14:43,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:14:43,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:14:43,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 64 transitions, 411 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 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) [2024-06-21 17:14:43,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:14:43,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:14:43,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:14:43,978 INFO L124 PetriNetUnfolderBase]: 1407/2136 cut-off events. [2024-06-21 17:14:43,978 INFO L125 PetriNetUnfolderBase]: For 7168/7168 co-relation queries the response was YES. [2024-06-21 17:14:43,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7874 conditions, 2136 events. 1407/2136 cut-off events. For 7168/7168 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 10039 event pairs, 514 based on Foata normal form. 3/2137 useless extension candidates. Maximal degree in co-relation 7846. Up to 1973 conditions per place. [2024-06-21 17:14:43,988 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 59 selfloop transitions, 23 changer transitions 0/86 dead transitions. [2024-06-21 17:14:43,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 86 transitions, 633 flow [2024-06-21 17:14:43,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:14:43,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:14:43,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-21 17:14:43,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 17:14:43,992 INFO L175 Difference]: Start difference. First operand has 66 places, 64 transitions, 411 flow. Second operand 6 states and 108 transitions. [2024-06-21 17:14:43,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 86 transitions, 633 flow [2024-06-21 17:14:43,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 86 transitions, 600 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 17:14:43,997 INFO L231 Difference]: Finished difference. Result has 69 places, 64 transitions, 433 flow [2024-06-21 17:14:43,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=433, PETRI_PLACES=69, PETRI_TRANSITIONS=64} [2024-06-21 17:14:43,998 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 26 predicate places. [2024-06-21 17:14:43,998 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 64 transitions, 433 flow [2024-06-21 17:14:43,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 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) [2024-06-21 17:14:43,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:14:43,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:14:43,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 17:14:43,999 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:14:43,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:14:43,999 INFO L85 PathProgramCache]: Analyzing trace with hash -2032757366, now seen corresponding path program 1 times [2024-06-21 17:14:43,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:14:44,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796580305] [2024-06-21 17:14:44,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:14:44,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:14:44,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:14:45,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:14:45,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:14:45,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796580305] [2024-06-21 17:14:45,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796580305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:14:45,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:14:45,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:14:45,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944065607] [2024-06-21 17:14:45,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:14:45,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:14:45,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:14:45,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:14:45,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:14:45,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:14:45,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 64 transitions, 433 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:45,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:14:45,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:14:45,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:14:47,474 INFO L124 PetriNetUnfolderBase]: 2219/3316 cut-off events. [2024-06-21 17:14:47,474 INFO L125 PetriNetUnfolderBase]: For 12825/12827 co-relation queries the response was YES. [2024-06-21 17:14:47,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12394 conditions, 3316 events. 2219/3316 cut-off events. For 12825/12827 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 16105 event pairs, 571 based on Foata normal form. 22/3337 useless extension candidates. Maximal degree in co-relation 12365. Up to 2314 conditions per place. [2024-06-21 17:14:47,492 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 110 selfloop transitions, 57 changer transitions 0/171 dead transitions. [2024-06-21 17:14:47,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 171 transitions, 1314 flow [2024-06-21 17:14:47,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:14:47,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:14:47,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 215 transitions. [2024-06-21 17:14:47,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4653679653679654 [2024-06-21 17:14:47,494 INFO L175 Difference]: Start difference. First operand has 69 places, 64 transitions, 433 flow. Second operand 11 states and 215 transitions. [2024-06-21 17:14:47,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 171 transitions, 1314 flow [2024-06-21 17:14:47,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 171 transitions, 1179 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 17:14:47,505 INFO L231 Difference]: Finished difference. Result has 80 places, 102 transitions, 776 flow [2024-06-21 17:14:47,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=776, PETRI_PLACES=80, PETRI_TRANSITIONS=102} [2024-06-21 17:14:47,505 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 37 predicate places. [2024-06-21 17:14:47,505 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 102 transitions, 776 flow [2024-06-21 17:14:47,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:47,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:14:47,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:14:47,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 17:14:47,506 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:14:47,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:14:47,506 INFO L85 PathProgramCache]: Analyzing trace with hash -909354630, now seen corresponding path program 2 times [2024-06-21 17:14:47,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:14:47,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193003090] [2024-06-21 17:14:47,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:14:47,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:14:47,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:14:49,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:14:49,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:14:49,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193003090] [2024-06-21 17:14:49,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193003090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:14:49,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:14:49,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:14:49,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898514541] [2024-06-21 17:14:49,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:14:49,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:14:49,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:14:49,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:14:49,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:14:49,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:14:49,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 102 transitions, 776 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:49,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:14:49,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:14:49,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:14:51,214 INFO L124 PetriNetUnfolderBase]: 2651/3944 cut-off events. [2024-06-21 17:14:51,214 INFO L125 PetriNetUnfolderBase]: For 20806/20810 co-relation queries the response was YES. [2024-06-21 17:14:51,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17603 conditions, 3944 events. 2651/3944 cut-off events. For 20806/20810 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 19660 event pairs, 590 based on Foata normal form. 38/3981 useless extension candidates. Maximal degree in co-relation 17567. Up to 2554 conditions per place. [2024-06-21 17:14:51,234 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 90 selfloop transitions, 76 changer transitions 0/170 dead transitions. [2024-06-21 17:14:51,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 170 transitions, 1486 flow [2024-06-21 17:14:51,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:14:51,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:14:51,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 17:14:51,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 17:14:51,236 INFO L175 Difference]: Start difference. First operand has 80 places, 102 transitions, 776 flow. Second operand 9 states and 171 transitions. [2024-06-21 17:14:51,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 170 transitions, 1486 flow [2024-06-21 17:14:51,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 170 transitions, 1443 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-21 17:14:51,258 INFO L231 Difference]: Finished difference. Result has 89 places, 121 transitions, 1106 flow [2024-06-21 17:14:51,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=737, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1106, PETRI_PLACES=89, PETRI_TRANSITIONS=121} [2024-06-21 17:14:51,260 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-21 17:14:51,261 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 121 transitions, 1106 flow [2024-06-21 17:14:51,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:51,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:14:51,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:14:51,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 17:14:51,262 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:14:51,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:14:51,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1316811262, now seen corresponding path program 3 times [2024-06-21 17:14:51,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:14:51,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398270680] [2024-06-21 17:14:51,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:14:51,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:14:51,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:14:53,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:14:53,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:14:53,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398270680] [2024-06-21 17:14:53,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398270680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:14:53,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:14:53,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:14:53,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465718412] [2024-06-21 17:14:53,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:14:53,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:14:53,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:14:53,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:14:53,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:14:53,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:14:53,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 121 transitions, 1106 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:53,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:14:53,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:14:53,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:14:54,795 INFO L124 PetriNetUnfolderBase]: 2679/3984 cut-off events. [2024-06-21 17:14:54,796 INFO L125 PetriNetUnfolderBase]: For 27431/27433 co-relation queries the response was YES. [2024-06-21 17:14:54,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20278 conditions, 3984 events. 2679/3984 cut-off events. For 27431/27433 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 19795 event pairs, 682 based on Foata normal form. 18/4000 useless extension candidates. Maximal degree in co-relation 20238. Up to 3501 conditions per place. [2024-06-21 17:14:54,820 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 113 selfloop transitions, 52 changer transitions 0/169 dead transitions. [2024-06-21 17:14:54,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 169 transitions, 1720 flow [2024-06-21 17:14:54,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:14:54,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:14:54,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 17:14:54,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-21 17:14:54,833 INFO L175 Difference]: Start difference. First operand has 89 places, 121 transitions, 1106 flow. Second operand 8 states and 142 transitions. [2024-06-21 17:14:54,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 169 transitions, 1720 flow [2024-06-21 17:14:54,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 169 transitions, 1593 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 17:14:54,877 INFO L231 Difference]: Finished difference. Result has 93 places, 135 transitions, 1265 flow [2024-06-21 17:14:54,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=989, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1265, PETRI_PLACES=93, PETRI_TRANSITIONS=135} [2024-06-21 17:14:54,878 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 50 predicate places. [2024-06-21 17:14:54,878 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 135 transitions, 1265 flow [2024-06-21 17:14:54,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:54,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:14:54,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:14:54,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 17:14:54,878 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:14:54,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:14:54,879 INFO L85 PathProgramCache]: Analyzing trace with hash -731985960, now seen corresponding path program 4 times [2024-06-21 17:14:54,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:14:54,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768489536] [2024-06-21 17:14:54,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:14:54,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:14:54,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:14:56,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:14:56,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:14:56,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768489536] [2024-06-21 17:14:56,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768489536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:14:56,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:14:56,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:14:56,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888384485] [2024-06-21 17:14:56,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:14:56,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:14:56,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:14:56,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:14:56,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:14:56,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:14:56,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 135 transitions, 1265 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:56,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:14:56,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:14:56,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:14:58,220 INFO L124 PetriNetUnfolderBase]: 2669/3951 cut-off events. [2024-06-21 17:14:58,220 INFO L125 PetriNetUnfolderBase]: For 30673/30675 co-relation queries the response was YES. [2024-06-21 17:14:58,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20239 conditions, 3951 events. 2669/3951 cut-off events. For 30673/30675 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 19246 event pairs, 680 based on Foata normal form. 4/3953 useless extension candidates. Maximal degree in co-relation 20197. Up to 3377 conditions per place. [2024-06-21 17:14:58,247 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 149 selfloop transitions, 55 changer transitions 0/208 dead transitions. [2024-06-21 17:14:58,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 208 transitions, 2261 flow [2024-06-21 17:14:58,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:14:58,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:14:58,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-21 17:14:58,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-21 17:14:58,249 INFO L175 Difference]: Start difference. First operand has 93 places, 135 transitions, 1265 flow. Second operand 7 states and 128 transitions. [2024-06-21 17:14:58,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 208 transitions, 2261 flow [2024-06-21 17:14:58,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 208 transitions, 2080 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-21 17:14:58,294 INFO L231 Difference]: Finished difference. Result has 98 places, 174 transitions, 1759 flow [2024-06-21 17:14:58,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1144, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1759, PETRI_PLACES=98, PETRI_TRANSITIONS=174} [2024-06-21 17:14:58,295 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2024-06-21 17:14:58,295 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 174 transitions, 1759 flow [2024-06-21 17:14:58,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:14:58,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:14:58,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:14:58,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 17:14:58,296 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:14:58,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:14:58,296 INFO L85 PathProgramCache]: Analyzing trace with hash 122140330, now seen corresponding path program 1 times [2024-06-21 17:14:58,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:14:58,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289982401] [2024-06-21 17:14:58,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:14:58,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:14:58,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:15:00,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:15:00,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:15:00,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289982401] [2024-06-21 17:15:00,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289982401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:15:00,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:15:00,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:15:00,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357494497] [2024-06-21 17:15:00,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:15:00,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:15:00,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:15:00,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:15:00,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:15:00,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:15:00,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 174 transitions, 1759 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:00,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:15:00,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:15:00,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:15:01,980 INFO L124 PetriNetUnfolderBase]: 2661/3955 cut-off events. [2024-06-21 17:15:01,980 INFO L125 PetriNetUnfolderBase]: For 32459/32461 co-relation queries the response was YES. [2024-06-21 17:15:01,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20934 conditions, 3955 events. 2661/3955 cut-off events. For 32459/32461 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 19428 event pairs, 782 based on Foata normal form. 4/3958 useless extension candidates. Maximal degree in co-relation 20888. Up to 3825 conditions per place. [2024-06-21 17:15:02,019 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 185 selfloop transitions, 13 changer transitions 0/202 dead transitions. [2024-06-21 17:15:02,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 202 transitions, 2255 flow [2024-06-21 17:15:02,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:15:02,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:15:02,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-21 17:15:02,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-21 17:15:02,021 INFO L175 Difference]: Start difference. First operand has 98 places, 174 transitions, 1759 flow. Second operand 7 states and 116 transitions. [2024-06-21 17:15:02,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 202 transitions, 2255 flow [2024-06-21 17:15:02,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 202 transitions, 2225 flow, removed 14 selfloop flow, removed 1 redundant places. [2024-06-21 17:15:02,075 INFO L231 Difference]: Finished difference. Result has 104 places, 176 transitions, 1786 flow [2024-06-21 17:15:02,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1731, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1786, PETRI_PLACES=104, PETRI_TRANSITIONS=176} [2024-06-21 17:15:02,076 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 61 predicate places. [2024-06-21 17:15:02,076 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 176 transitions, 1786 flow [2024-06-21 17:15:02,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:02,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:15:02,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:15:02,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 17:15:02,077 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:15:02,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:15:02,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1129540423, now seen corresponding path program 1 times [2024-06-21 17:15:02,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:15:02,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365931946] [2024-06-21 17:15:02,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:15:02,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:15:02,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:15:04,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:15:04,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:15:04,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365931946] [2024-06-21 17:15:04,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365931946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:15:04,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:15:04,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:15:04,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701127209] [2024-06-21 17:15:04,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:15:04,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:15:04,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:15:04,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:15:04,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:15:04,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:15:04,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 176 transitions, 1786 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:04,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:15:04,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:15:04,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:15:05,394 INFO L124 PetriNetUnfolderBase]: 2853/4268 cut-off events. [2024-06-21 17:15:05,394 INFO L125 PetriNetUnfolderBase]: For 39018/39026 co-relation queries the response was YES. [2024-06-21 17:15:05,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22822 conditions, 4268 events. 2853/4268 cut-off events. For 39018/39026 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 21702 event pairs, 611 based on Foata normal form. 26/4293 useless extension candidates. Maximal degree in co-relation 22773. Up to 2695 conditions per place. [2024-06-21 17:15:05,451 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 108 selfloop transitions, 125 changer transitions 0/237 dead transitions. [2024-06-21 17:15:05,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 237 transitions, 2717 flow [2024-06-21 17:15:05,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:15:05,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:15:05,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 17:15:05,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 17:15:05,453 INFO L175 Difference]: Start difference. First operand has 104 places, 176 transitions, 1786 flow. Second operand 8 states and 152 transitions. [2024-06-21 17:15:05,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 237 transitions, 2717 flow [2024-06-21 17:15:05,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 237 transitions, 2682 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 17:15:05,505 INFO L231 Difference]: Finished difference. Result has 108 places, 197 transitions, 2315 flow [2024-06-21 17:15:05,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1751, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2315, PETRI_PLACES=108, PETRI_TRANSITIONS=197} [2024-06-21 17:15:05,505 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 65 predicate places. [2024-06-21 17:15:05,506 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 197 transitions, 2315 flow [2024-06-21 17:15:05,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:05,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:15:05,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:15:05,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 17:15:05,506 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:15:05,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:15:05,507 INFO L85 PathProgramCache]: Analyzing trace with hash -719714125, now seen corresponding path program 2 times [2024-06-21 17:15:05,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:15:05,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280274668] [2024-06-21 17:15:05,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:15:05,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:15:05,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:15:07,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:15:07,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:15:07,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280274668] [2024-06-21 17:15:07,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280274668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:15:07,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:15:07,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:15:07,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740245259] [2024-06-21 17:15:07,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:15:07,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:15:07,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:15:07,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:15:07,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:15:07,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:15:07,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 197 transitions, 2315 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:07,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:15:07,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:15:07,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:15:09,135 INFO L124 PetriNetUnfolderBase]: 2813/4228 cut-off events. [2024-06-21 17:15:09,135 INFO L125 PetriNetUnfolderBase]: For 45879/45891 co-relation queries the response was YES. [2024-06-21 17:15:09,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24198 conditions, 4228 events. 2813/4228 cut-off events. For 45879/45891 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 21578 event pairs, 690 based on Foata normal form. 32/4259 useless extension candidates. Maximal degree in co-relation 24147. Up to 2673 conditions per place. [2024-06-21 17:15:09,165 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 115 selfloop transitions, 137 changer transitions 0/256 dead transitions. [2024-06-21 17:15:09,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 256 transitions, 3137 flow [2024-06-21 17:15:09,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:15:09,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:15:09,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-21 17:15:09,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47354497354497355 [2024-06-21 17:15:09,167 INFO L175 Difference]: Start difference. First operand has 108 places, 197 transitions, 2315 flow. Second operand 9 states and 179 transitions. [2024-06-21 17:15:09,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 256 transitions, 3137 flow [2024-06-21 17:15:09,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 256 transitions, 3005 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-21 17:15:09,266 INFO L231 Difference]: Finished difference. Result has 116 places, 202 transitions, 2659 flow [2024-06-21 17:15:09,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2183, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2659, PETRI_PLACES=116, PETRI_TRANSITIONS=202} [2024-06-21 17:15:09,267 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 73 predicate places. [2024-06-21 17:15:09,267 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 202 transitions, 2659 flow [2024-06-21 17:15:09,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:09,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:15:09,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:15:09,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 17:15:09,268 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:15:09,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:15:09,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1204099309, now seen corresponding path program 3 times [2024-06-21 17:15:09,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:15:09,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889565556] [2024-06-21 17:15:09,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:15:09,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:15:09,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:15:11,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:15:11,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:15:11,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889565556] [2024-06-21 17:15:11,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889565556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:15:11,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:15:11,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:15:11,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704437629] [2024-06-21 17:15:11,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:15:11,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:15:11,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:15:11,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:15:11,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:15:11,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:15:11,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 202 transitions, 2659 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:11,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:15:11,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:15:11,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:15:12,944 INFO L124 PetriNetUnfolderBase]: 2803/4202 cut-off events. [2024-06-21 17:15:12,944 INFO L125 PetriNetUnfolderBase]: For 51450/51466 co-relation queries the response was YES. [2024-06-21 17:15:12,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26170 conditions, 4202 events. 2803/4202 cut-off events. For 51450/51466 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 21147 event pairs, 712 based on Foata normal form. 13/4213 useless extension candidates. Maximal degree in co-relation 26115. Up to 3557 conditions per place. [2024-06-21 17:15:12,974 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 176 selfloop transitions, 53 changer transitions 0/233 dead transitions. [2024-06-21 17:15:12,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 233 transitions, 3252 flow [2024-06-21 17:15:12,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:15:12,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:15:12,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-21 17:15:12,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-21 17:15:12,976 INFO L175 Difference]: Start difference. First operand has 116 places, 202 transitions, 2659 flow. Second operand 7 states and 123 transitions. [2024-06-21 17:15:12,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 233 transitions, 3252 flow [2024-06-21 17:15:13,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 233 transitions, 2979 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-21 17:15:13,061 INFO L231 Difference]: Finished difference. Result has 117 places, 205 transitions, 2569 flow [2024-06-21 17:15:13,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2394, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2569, PETRI_PLACES=117, PETRI_TRANSITIONS=205} [2024-06-21 17:15:13,062 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 74 predicate places. [2024-06-21 17:15:13,062 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 205 transitions, 2569 flow [2024-06-21 17:15:13,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:13,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:15:13,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:15:13,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 17:15:13,063 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:15:13,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:15:13,063 INFO L85 PathProgramCache]: Analyzing trace with hash 62028631, now seen corresponding path program 1 times [2024-06-21 17:15:13,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:15:13,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501141545] [2024-06-21 17:15:13,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:15:13,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:15:13,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:15:15,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:15:15,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:15:15,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501141545] [2024-06-21 17:15:15,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501141545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:15:15,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:15:15,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:15:15,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486679625] [2024-06-21 17:15:15,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:15:15,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:15:15,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:15:15,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:15:15,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:15:15,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:15:15,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 205 transitions, 2569 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:15,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:15:15,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:15:15,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:15:16,972 INFO L124 PetriNetUnfolderBase]: 2831/4246 cut-off events. [2024-06-21 17:15:16,972 INFO L125 PetriNetUnfolderBase]: For 53859/53867 co-relation queries the response was YES. [2024-06-21 17:15:16,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25913 conditions, 4246 events. 2831/4246 cut-off events. For 53859/53867 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 21657 event pairs, 571 based on Foata normal form. 12/4257 useless extension candidates. Maximal degree in co-relation 25857. Up to 3688 conditions per place. [2024-06-21 17:15:16,999 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 188 selfloop transitions, 50 changer transitions 0/242 dead transitions. [2024-06-21 17:15:17,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 242 transitions, 3281 flow [2024-06-21 17:15:17,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:15:17,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:15:17,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-21 17:15:17,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-21 17:15:17,001 INFO L175 Difference]: Start difference. First operand has 117 places, 205 transitions, 2569 flow. Second operand 7 states and 129 transitions. [2024-06-21 17:15:17,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 242 transitions, 3281 flow [2024-06-21 17:15:17,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 242 transitions, 3221 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 17:15:17,083 INFO L231 Difference]: Finished difference. Result has 121 places, 209 transitions, 2676 flow [2024-06-21 17:15:17,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2509, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2676, PETRI_PLACES=121, PETRI_TRANSITIONS=209} [2024-06-21 17:15:17,084 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 78 predicate places. [2024-06-21 17:15:17,084 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 209 transitions, 2676 flow [2024-06-21 17:15:17,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:17,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:15:17,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:15:17,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 17:15:17,085 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:15:17,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:15:17,085 INFO L85 PathProgramCache]: Analyzing trace with hash -2129663713, now seen corresponding path program 2 times [2024-06-21 17:15:17,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:15:17,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404682246] [2024-06-21 17:15:17,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:15:17,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:15:17,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:15:19,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:15:19,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:15:19,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404682246] [2024-06-21 17:15:19,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404682246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:15:19,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:15:19,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:15:19,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719426856] [2024-06-21 17:15:19,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:15:19,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:15:19,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:15:19,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:15:19,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:15:19,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:15:19,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 209 transitions, 2676 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:19,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:15:19,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:15:19,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:15:20,748 INFO L124 PetriNetUnfolderBase]: 2818/4221 cut-off events. [2024-06-21 17:15:20,749 INFO L125 PetriNetUnfolderBase]: For 58199/58203 co-relation queries the response was YES. [2024-06-21 17:15:20,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25995 conditions, 4221 events. 2818/4221 cut-off events. For 58199/58203 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 21380 event pairs, 746 based on Foata normal form. 8/4228 useless extension candidates. Maximal degree in co-relation 25937. Up to 3818 conditions per place. [2024-06-21 17:15:20,777 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 179 selfloop transitions, 57 changer transitions 0/240 dead transitions. [2024-06-21 17:15:20,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 240 transitions, 3263 flow [2024-06-21 17:15:20,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:15:20,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:15:20,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 17:15:20,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-21 17:15:20,780 INFO L175 Difference]: Start difference. First operand has 121 places, 209 transitions, 2676 flow. Second operand 7 states and 127 transitions. [2024-06-21 17:15:20,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 240 transitions, 3263 flow [2024-06-21 17:15:20,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 240 transitions, 3175 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-21 17:15:20,873 INFO L231 Difference]: Finished difference. Result has 125 places, 209 transitions, 2714 flow [2024-06-21 17:15:20,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2588, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2714, PETRI_PLACES=125, PETRI_TRANSITIONS=209} [2024-06-21 17:15:20,874 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 82 predicate places. [2024-06-21 17:15:20,874 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 209 transitions, 2714 flow [2024-06-21 17:15:20,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:20,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:15:20,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:15:20,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 17:15:20,875 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:15:20,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:15:20,875 INFO L85 PathProgramCache]: Analyzing trace with hash -2011391335, now seen corresponding path program 1 times [2024-06-21 17:15:20,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:15:20,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879961355] [2024-06-21 17:15:20,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:15:20,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:15:20,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:15:24,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:15:24,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:15:24,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879961355] [2024-06-21 17:15:24,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879961355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:15:24,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:15:24,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:15:24,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816112667] [2024-06-21 17:15:24,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:15:24,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:15:24,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:15:24,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:15:24,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:15:24,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:15:24,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 209 transitions, 2714 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:24,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:15:24,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:15:24,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:15:25,668 INFO L124 PetriNetUnfolderBase]: 3218/4879 cut-off events. [2024-06-21 17:15:25,668 INFO L125 PetriNetUnfolderBase]: For 79649/79653 co-relation queries the response was YES. [2024-06-21 17:15:25,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28751 conditions, 4879 events. 3218/4879 cut-off events. For 79649/79653 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 25848 event pairs, 698 based on Foata normal form. 94/4972 useless extension candidates. Maximal degree in co-relation 28691. Up to 2588 conditions per place. [2024-06-21 17:15:25,698 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 122 selfloop transitions, 143 changer transitions 0/269 dead transitions. [2024-06-21 17:15:25,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 269 transitions, 3551 flow [2024-06-21 17:15:25,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:15:25,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:15:25,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-21 17:15:25,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595238095238095 [2024-06-21 17:15:25,701 INFO L175 Difference]: Start difference. First operand has 125 places, 209 transitions, 2714 flow. Second operand 10 states and 193 transitions. [2024-06-21 17:15:25,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 269 transitions, 3551 flow [2024-06-21 17:15:25,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 269 transitions, 3426 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 17:15:25,793 INFO L231 Difference]: Finished difference. Result has 129 places, 212 transitions, 2951 flow [2024-06-21 17:15:25,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2589, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2951, PETRI_PLACES=129, PETRI_TRANSITIONS=212} [2024-06-21 17:15:25,793 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-21 17:15:25,793 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 212 transitions, 2951 flow [2024-06-21 17:15:25,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:25,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:15:25,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:15:25,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 17:15:25,794 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:15:25,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:15:25,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1555520009, now seen corresponding path program 2 times [2024-06-21 17:15:25,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:15:25,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459638032] [2024-06-21 17:15:25,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:15:25,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:15:25,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:15:28,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:15:28,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:15:28,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459638032] [2024-06-21 17:15:28,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459638032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:15:28,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:15:28,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:15:28,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179147764] [2024-06-21 17:15:28,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:15:28,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:15:28,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:15:28,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:15:28,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:15:28,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:15:28,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 212 transitions, 2951 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:28,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:15:28,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:15:28,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:15:30,390 INFO L124 PetriNetUnfolderBase]: 3306/5027 cut-off events. [2024-06-21 17:15:30,391 INFO L125 PetriNetUnfolderBase]: For 78810/78812 co-relation queries the response was YES. [2024-06-21 17:15:30,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31074 conditions, 5027 events. 3306/5027 cut-off events. For 78810/78812 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 26759 event pairs, 887 based on Foata normal form. 18/5043 useless extension candidates. Maximal degree in co-relation 31013. Up to 4392 conditions per place. [2024-06-21 17:15:30,421 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 177 selfloop transitions, 77 changer transitions 0/258 dead transitions. [2024-06-21 17:15:30,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 258 transitions, 3692 flow [2024-06-21 17:15:30,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:15:30,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:15:30,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 17:15:30,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-21 17:15:30,423 INFO L175 Difference]: Start difference. First operand has 129 places, 212 transitions, 2951 flow. Second operand 9 states and 163 transitions. [2024-06-21 17:15:30,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 258 transitions, 3692 flow [2024-06-21 17:15:30,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 258 transitions, 3388 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-21 17:15:30,533 INFO L231 Difference]: Finished difference. Result has 130 places, 215 transitions, 2874 flow [2024-06-21 17:15:30,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2647, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2874, PETRI_PLACES=130, PETRI_TRANSITIONS=215} [2024-06-21 17:15:30,534 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 87 predicate places. [2024-06-21 17:15:30,534 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 215 transitions, 2874 flow [2024-06-21 17:15:30,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:30,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:15:30,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:15:30,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 17:15:30,535 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:15:30,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:15:30,535 INFO L85 PathProgramCache]: Analyzing trace with hash 936175991, now seen corresponding path program 3 times [2024-06-21 17:15:30,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:15:30,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466434023] [2024-06-21 17:15:30,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:15:30,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:15:30,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:15:33,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:15:33,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:15:33,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466434023] [2024-06-21 17:15:33,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466434023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:15:33,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:15:33,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:15:33,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434070437] [2024-06-21 17:15:33,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:15:33,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:15:33,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:15:33,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:15:33,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:15:33,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:15:33,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 215 transitions, 2874 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:33,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:15:33,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:15:33,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:15:35,277 INFO L124 PetriNetUnfolderBase]: 3326/5043 cut-off events. [2024-06-21 17:15:35,278 INFO L125 PetriNetUnfolderBase]: For 76848/76850 co-relation queries the response was YES. [2024-06-21 17:15:35,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30537 conditions, 5043 events. 3326/5043 cut-off events. For 76848/76850 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 26612 event pairs, 868 based on Foata normal form. 4/5045 useless extension candidates. Maximal degree in co-relation 30475. Up to 4396 conditions per place. [2024-06-21 17:15:35,308 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 185 selfloop transitions, 64 changer transitions 0/253 dead transitions. [2024-06-21 17:15:35,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 253 transitions, 3526 flow [2024-06-21 17:15:35,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:15:35,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:15:35,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 17:15:35,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-21 17:15:35,310 INFO L175 Difference]: Start difference. First operand has 130 places, 215 transitions, 2874 flow. Second operand 8 states and 141 transitions. [2024-06-21 17:15:35,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 253 transitions, 3526 flow [2024-06-21 17:15:35,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 253 transitions, 3337 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-21 17:15:35,412 INFO L231 Difference]: Finished difference. Result has 131 places, 217 transitions, 2860 flow [2024-06-21 17:15:35,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2685, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2860, PETRI_PLACES=131, PETRI_TRANSITIONS=217} [2024-06-21 17:15:35,413 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 88 predicate places. [2024-06-21 17:15:35,413 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 217 transitions, 2860 flow [2024-06-21 17:15:35,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:35,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:15:35,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:15:35,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 17:15:35,413 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)] === [2024-06-21 17:15:35,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:15:35,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1412778217, now seen corresponding path program 4 times [2024-06-21 17:15:35,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:15:35,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675637745] [2024-06-21 17:15:35,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:15:35,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:15:35,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:15:38,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:15:38,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:15:38,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675637745] [2024-06-21 17:15:38,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675637745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:15:38,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:15:38,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:15:38,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71666829] [2024-06-21 17:15:38,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:15:38,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:15:38,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:15:38,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:15:38,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:15:38,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:15:38,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 217 transitions, 2860 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:38,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:15:38,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:15:38,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:15:39,801 INFO L124 PetriNetUnfolderBase]: 3318/5039 cut-off events. [2024-06-21 17:15:39,802 INFO L125 PetriNetUnfolderBase]: For 79638/79640 co-relation queries the response was YES. [2024-06-21 17:15:39,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30356 conditions, 5039 events. 3318/5039 cut-off events. For 79638/79640 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 26684 event pairs, 821 based on Foata normal form. 4/5041 useless extension candidates. Maximal degree in co-relation 30293. Up to 4100 conditions per place. [2024-06-21 17:15:39,837 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 186 selfloop transitions, 71 changer transitions 0/261 dead transitions. [2024-06-21 17:15:39,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 261 transitions, 3560 flow [2024-06-21 17:15:39,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:15:39,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:15:39,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 17:15:39,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-21 17:15:39,839 INFO L175 Difference]: Start difference. First operand has 131 places, 217 transitions, 2860 flow. Second operand 8 states and 145 transitions. [2024-06-21 17:15:39,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 261 transitions, 3560 flow [2024-06-21 17:15:39,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 261 transitions, 3405 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 17:15:39,945 INFO L231 Difference]: Finished difference. Result has 134 places, 221 transitions, 2928 flow [2024-06-21 17:15:39,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2705, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2928, PETRI_PLACES=134, PETRI_TRANSITIONS=221} [2024-06-21 17:15:39,946 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 91 predicate places. [2024-06-21 17:15:39,946 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 221 transitions, 2928 flow [2024-06-21 17:15:39,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:39,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:15:39,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:15:39,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 17:15:39,948 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:15:39,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:15:39,948 INFO L85 PathProgramCache]: Analyzing trace with hash 661302518, now seen corresponding path program 1 times [2024-06-21 17:15:39,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:15:39,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831114538] [2024-06-21 17:15:39,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:15:39,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:15:39,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:15:41,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:15:41,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:15:41,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831114538] [2024-06-21 17:15:41,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831114538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:15:41,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:15:41,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:15:41,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443592602] [2024-06-21 17:15:41,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:15:41,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:15:41,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:15:41,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:15:41,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:15:41,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:15:41,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 221 transitions, 2928 flow. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:41,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:15:41,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:15:41,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:15:42,865 INFO L124 PetriNetUnfolderBase]: 3312/5048 cut-off events. [2024-06-21 17:15:42,865 INFO L125 PetriNetUnfolderBase]: For 83868/83870 co-relation queries the response was YES. [2024-06-21 17:15:42,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30778 conditions, 5048 events. 3312/5048 cut-off events. For 83868/83870 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 27119 event pairs, 1028 based on Foata normal form. 2/5049 useless extension candidates. Maximal degree in co-relation 30713. Up to 4918 conditions per place. [2024-06-21 17:15:42,904 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 221 selfloop transitions, 10 changer transitions 0/235 dead transitions. [2024-06-21 17:15:42,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 235 transitions, 3450 flow [2024-06-21 17:15:42,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:15:42,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:15:42,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 82 transitions. [2024-06-21 17:15:42,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-06-21 17:15:42,906 INFO L175 Difference]: Start difference. First operand has 134 places, 221 transitions, 2928 flow. Second operand 5 states and 82 transitions. [2024-06-21 17:15:42,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 235 transitions, 3450 flow [2024-06-21 17:15:43,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 235 transitions, 3295 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 17:15:43,027 INFO L231 Difference]: Finished difference. Result has 134 places, 224 transitions, 2833 flow [2024-06-21 17:15:43,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2773, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2833, PETRI_PLACES=134, PETRI_TRANSITIONS=224} [2024-06-21 17:15:43,027 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 91 predicate places. [2024-06-21 17:15:43,028 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 224 transitions, 2833 flow [2024-06-21 17:15:43,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:43,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:15:43,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:15:43,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 17:15:43,028 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:15:43,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:15:43,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1596938176, now seen corresponding path program 1 times [2024-06-21 17:15:43,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:15:43,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304879780] [2024-06-21 17:15:43,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:15:43,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:15:43,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:15:45,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:15:45,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:15:45,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304879780] [2024-06-21 17:15:45,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304879780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:15:45,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:15:45,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:15:45,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417471442] [2024-06-21 17:15:45,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:15:45,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:15:45,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:15:45,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:15:45,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:15:45,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:15:45,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 224 transitions, 2833 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:45,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:15:45,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:15:45,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:15:47,502 INFO L124 PetriNetUnfolderBase]: 4507/6948 cut-off events. [2024-06-21 17:15:47,502 INFO L125 PetriNetUnfolderBase]: For 156181/156189 co-relation queries the response was YES. [2024-06-21 17:15:47,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41439 conditions, 6948 events. 4507/6948 cut-off events. For 156181/156189 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 40428 event pairs, 919 based on Foata normal form. 78/7025 useless extension candidates. Maximal degree in co-relation 41373. Up to 2587 conditions per place. [2024-06-21 17:15:47,551 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 179 selfloop transitions, 126 changer transitions 0/309 dead transitions. [2024-06-21 17:15:47,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 309 transitions, 4109 flow [2024-06-21 17:15:47,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:15:47,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:15:47,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-21 17:15:47,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2024-06-21 17:15:47,553 INFO L175 Difference]: Start difference. First operand has 134 places, 224 transitions, 2833 flow. Second operand 9 states and 192 transitions. [2024-06-21 17:15:47,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 309 transitions, 4109 flow [2024-06-21 17:15:47,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 309 transitions, 4071 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-21 17:15:47,721 INFO L231 Difference]: Finished difference. Result has 142 places, 234 transitions, 3329 flow [2024-06-21 17:15:47,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2795, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3329, PETRI_PLACES=142, PETRI_TRANSITIONS=234} [2024-06-21 17:15:47,722 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 99 predicate places. [2024-06-21 17:15:47,722 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 234 transitions, 3329 flow [2024-06-21 17:15:47,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:47,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:15:47,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:15:47,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 17:15:47,723 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:15:47,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:15:47,723 INFO L85 PathProgramCache]: Analyzing trace with hash -294174434, now seen corresponding path program 2 times [2024-06-21 17:15:47,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:15:47,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814272130] [2024-06-21 17:15:47,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:15:47,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:15:47,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:15:50,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:15:50,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:15:50,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814272130] [2024-06-21 17:15:50,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814272130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:15:50,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:15:50,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:15:50,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062284137] [2024-06-21 17:15:50,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:15:50,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:15:50,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:15:50,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:15:50,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:15:50,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:15:50,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 234 transitions, 3329 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:50,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:15:50,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:15:50,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:15:52,931 INFO L124 PetriNetUnfolderBase]: 5183/8024 cut-off events. [2024-06-21 17:15:52,931 INFO L125 PetriNetUnfolderBase]: For 207906/207910 co-relation queries the response was YES. [2024-06-21 17:15:52,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49568 conditions, 8024 events. 5183/8024 cut-off events. For 207906/207910 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 48266 event pairs, 1487 based on Foata normal form. 74/8097 useless extension candidates. Maximal degree in co-relation 49499. Up to 4493 conditions per place. [2024-06-21 17:15:52,989 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 160 selfloop transitions, 146 changer transitions 0/310 dead transitions. [2024-06-21 17:15:52,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 310 transitions, 4472 flow [2024-06-21 17:15:52,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:15:52,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:15:52,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-21 17:15:52,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2024-06-21 17:15:52,991 INFO L175 Difference]: Start difference. First operand has 142 places, 234 transitions, 3329 flow. Second operand 10 states and 204 transitions. [2024-06-21 17:15:52,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 310 transitions, 4472 flow [2024-06-21 17:15:53,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 310 transitions, 4252 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-21 17:15:53,280 INFO L231 Difference]: Finished difference. Result has 149 places, 241 transitions, 3605 flow [2024-06-21 17:15:53,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3113, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3605, PETRI_PLACES=149, PETRI_TRANSITIONS=241} [2024-06-21 17:15:53,280 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 106 predicate places. [2024-06-21 17:15:53,280 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 241 transitions, 3605 flow [2024-06-21 17:15:53,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:53,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:15:53,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:15:53,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 17:15:53,281 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:15:53,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:15:53,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1132910190, now seen corresponding path program 3 times [2024-06-21 17:15:53,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:15:53,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586643590] [2024-06-21 17:15:53,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:15:53,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:15:53,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:15:56,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:15:56,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:15:56,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586643590] [2024-06-21 17:15:56,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586643590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:15:56,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:15:56,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:15:56,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903858777] [2024-06-21 17:15:56,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:15:56,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:15:56,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:15:56,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:15:56,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:15:56,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:15:56,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 241 transitions, 3605 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:56,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:15:56,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:15:56,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:15:58,566 INFO L124 PetriNetUnfolderBase]: 5792/9076 cut-off events. [2024-06-21 17:15:58,566 INFO L125 PetriNetUnfolderBase]: For 247429/247441 co-relation queries the response was YES. [2024-06-21 17:15:58,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56482 conditions, 9076 events. 5792/9076 cut-off events. For 247429/247441 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 57259 event pairs, 1642 based on Foata normal form. 76/9151 useless extension candidates. Maximal degree in co-relation 56410. Up to 5897 conditions per place. [2024-06-21 17:15:58,631 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 174 selfloop transitions, 144 changer transitions 0/322 dead transitions. [2024-06-21 17:15:58,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 322 transitions, 4832 flow [2024-06-21 17:15:58,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:15:58,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:15:58,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 208 transitions. [2024-06-21 17:15:58,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49523809523809526 [2024-06-21 17:15:58,633 INFO L175 Difference]: Start difference. First operand has 149 places, 241 transitions, 3605 flow. Second operand 10 states and 208 transitions. [2024-06-21 17:15:58,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 322 transitions, 4832 flow [2024-06-21 17:15:58,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 322 transitions, 4498 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-21 17:15:58,996 INFO L231 Difference]: Finished difference. Result has 153 places, 247 transitions, 3724 flow [2024-06-21 17:15:58,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3271, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3724, PETRI_PLACES=153, PETRI_TRANSITIONS=247} [2024-06-21 17:15:58,996 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 110 predicate places. [2024-06-21 17:15:58,996 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 247 transitions, 3724 flow [2024-06-21 17:15:58,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:15:58,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:15:58,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:15:58,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 17:15:58,997 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:15:58,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:15:58,997 INFO L85 PathProgramCache]: Analyzing trace with hash 2071164104, now seen corresponding path program 4 times [2024-06-21 17:15:58,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:15:58,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405059357] [2024-06-21 17:15:58,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:15:58,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:15:59,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:16:01,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:16:01,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:16:01,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405059357] [2024-06-21 17:16:01,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405059357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:16:01,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:16:01,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:16:01,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060667466] [2024-06-21 17:16:01,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:16:01,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:16:01,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:16:01,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:16:01,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:16:01,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:16:01,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 247 transitions, 3724 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:01,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:16:01,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:16:01,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:16:03,818 INFO L124 PetriNetUnfolderBase]: 6104/9588 cut-off events. [2024-06-21 17:16:03,818 INFO L125 PetriNetUnfolderBase]: For 263688/263696 co-relation queries the response was YES. [2024-06-21 17:16:03,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58644 conditions, 9588 events. 6104/9588 cut-off events. For 263688/263696 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 61413 event pairs, 2143 based on Foata normal form. 80/9667 useless extension candidates. Maximal degree in co-relation 58570. Up to 7436 conditions per place. [2024-06-21 17:16:03,887 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 163 selfloop transitions, 131 changer transitions 0/298 dead transitions. [2024-06-21 17:16:03,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 298 transitions, 4574 flow [2024-06-21 17:16:03,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:16:03,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:16:03,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 17:16:03,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-21 17:16:03,888 INFO L175 Difference]: Start difference. First operand has 153 places, 247 transitions, 3724 flow. Second operand 9 states and 172 transitions. [2024-06-21 17:16:03,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 298 transitions, 4574 flow [2024-06-21 17:16:04,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 298 transitions, 4336 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-21 17:16:04,285 INFO L231 Difference]: Finished difference. Result has 156 places, 249 transitions, 3824 flow [2024-06-21 17:16:04,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3488, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3824, PETRI_PLACES=156, PETRI_TRANSITIONS=249} [2024-06-21 17:16:04,285 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 113 predicate places. [2024-06-21 17:16:04,286 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 249 transitions, 3824 flow [2024-06-21 17:16:04,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:04,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:16:04,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:16:04,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 17:16:04,286 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:16:04,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:16:04,286 INFO L85 PathProgramCache]: Analyzing trace with hash 2065801724, now seen corresponding path program 5 times [2024-06-21 17:16:04,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:16:04,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227352856] [2024-06-21 17:16:04,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:16:04,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:16:04,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:16:06,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:16:06,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:16:06,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227352856] [2024-06-21 17:16:06,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227352856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:16:06,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:16:06,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:16:06,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610264179] [2024-06-21 17:16:06,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:16:06,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:16:06,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:16:06,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:16:06,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:16:06,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:16:06,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 249 transitions, 3824 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:06,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:16:06,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:16:06,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:16:09,310 INFO L124 PetriNetUnfolderBase]: 6233/9831 cut-off events. [2024-06-21 17:16:09,310 INFO L125 PetriNetUnfolderBase]: For 267403/267415 co-relation queries the response was YES. [2024-06-21 17:16:09,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59250 conditions, 9831 events. 6233/9831 cut-off events. For 267403/267415 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 63720 event pairs, 2316 based on Foata normal form. 86/9916 useless extension candidates. Maximal degree in co-relation 59174. Up to 7667 conditions per place. [2024-06-21 17:16:09,377 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 172 selfloop transitions, 141 changer transitions 0/317 dead transitions. [2024-06-21 17:16:09,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 317 transitions, 4839 flow [2024-06-21 17:16:09,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:16:09,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:16:09,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 201 transitions. [2024-06-21 17:16:09,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4785714285714286 [2024-06-21 17:16:09,379 INFO L175 Difference]: Start difference. First operand has 156 places, 249 transitions, 3824 flow. Second operand 10 states and 201 transitions. [2024-06-21 17:16:09,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 317 transitions, 4839 flow [2024-06-21 17:16:09,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 317 transitions, 4551 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-21 17:16:09,733 INFO L231 Difference]: Finished difference. Result has 159 places, 251 transitions, 3896 flow [2024-06-21 17:16:09,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3536, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3896, PETRI_PLACES=159, PETRI_TRANSITIONS=251} [2024-06-21 17:16:09,733 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 116 predicate places. [2024-06-21 17:16:09,733 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 251 transitions, 3896 flow [2024-06-21 17:16:09,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:09,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:16:09,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:16:09,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 17:16:09,734 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:16:09,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:16:09,734 INFO L85 PathProgramCache]: Analyzing trace with hash 2071379306, now seen corresponding path program 1 times [2024-06-21 17:16:09,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:16:09,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247722689] [2024-06-21 17:16:09,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:16:09,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:16:09,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:16:12,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:16:12,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:16:12,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247722689] [2024-06-21 17:16:12,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247722689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:16:12,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:16:12,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:16:12,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529974155] [2024-06-21 17:16:12,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:16:12,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:16:12,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:16:12,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:16:12,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:16:12,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:16:12,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 251 transitions, 3896 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:12,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:16:12,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:16:12,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:16:15,097 INFO L124 PetriNetUnfolderBase]: 6344/10068 cut-off events. [2024-06-21 17:16:15,098 INFO L125 PetriNetUnfolderBase]: For 267911/267919 co-relation queries the response was YES. [2024-06-21 17:16:15,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59629 conditions, 10068 events. 6344/10068 cut-off events. For 267911/267919 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 66009 event pairs, 2050 based on Foata normal form. 60/10127 useless extension candidates. Maximal degree in co-relation 59552. Up to 5962 conditions per place. [2024-06-21 17:16:15,180 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 165 selfloop transitions, 137 changer transitions 0/306 dead transitions. [2024-06-21 17:16:15,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 306 transitions, 4766 flow [2024-06-21 17:16:15,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:16:15,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:16:15,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-21 17:16:15,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2024-06-21 17:16:15,182 INFO L175 Difference]: Start difference. First operand has 159 places, 251 transitions, 3896 flow. Second operand 9 states and 176 transitions. [2024-06-21 17:16:15,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 306 transitions, 4766 flow [2024-06-21 17:16:15,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 306 transitions, 4454 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-21 17:16:15,622 INFO L231 Difference]: Finished difference. Result has 160 places, 252 transitions, 3904 flow [2024-06-21 17:16:15,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3584, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3904, PETRI_PLACES=160, PETRI_TRANSITIONS=252} [2024-06-21 17:16:15,624 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-21 17:16:15,625 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 252 transitions, 3904 flow [2024-06-21 17:16:15,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:15,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:16:15,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:16:15,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 17:16:15,625 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:16:15,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:16:15,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1793274380, now seen corresponding path program 6 times [2024-06-21 17:16:15,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:16:15,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810731223] [2024-06-21 17:16:15,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:16:15,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:16:15,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:16:18,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:16:18,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:16:18,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810731223] [2024-06-21 17:16:18,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810731223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:16:18,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:16:18,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:16:18,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447853419] [2024-06-21 17:16:18,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:16:18,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:16:18,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:16:18,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:16:18,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:16:18,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:16:18,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 252 transitions, 3904 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:18,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:16:18,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:16:18,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:16:20,694 INFO L124 PetriNetUnfolderBase]: 6376/10140 cut-off events. [2024-06-21 17:16:20,694 INFO L125 PetriNetUnfolderBase]: For 260986/261002 co-relation queries the response was YES. [2024-06-21 17:16:20,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59880 conditions, 10140 events. 6376/10140 cut-off events. For 260986/261002 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 66751 event pairs, 2655 based on Foata normal form. 29/10167 useless extension candidates. Maximal degree in co-relation 59802. Up to 9260 conditions per place. [2024-06-21 17:16:20,769 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 233 selfloop transitions, 54 changer transitions 0/291 dead transitions. [2024-06-21 17:16:20,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 291 transitions, 4626 flow [2024-06-21 17:16:20,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:16:20,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:16:20,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 17:16:20,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-21 17:16:20,771 INFO L175 Difference]: Start difference. First operand has 160 places, 252 transitions, 3904 flow. Second operand 8 states and 141 transitions. [2024-06-21 17:16:20,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 291 transitions, 4626 flow [2024-06-21 17:16:21,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 291 transitions, 4250 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-21 17:16:21,173 INFO L231 Difference]: Finished difference. Result has 160 places, 253 transitions, 3667 flow [2024-06-21 17:16:21,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3528, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3667, PETRI_PLACES=160, PETRI_TRANSITIONS=253} [2024-06-21 17:16:21,174 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-21 17:16:21,174 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 253 transitions, 3667 flow [2024-06-21 17:16:21,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:21,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:16:21,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:16:21,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 17:16:21,175 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:16:21,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:16:21,175 INFO L85 PathProgramCache]: Analyzing trace with hash 2049990092, now seen corresponding path program 2 times [2024-06-21 17:16:21,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:16:21,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510842095] [2024-06-21 17:16:21,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:16:21,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:16:21,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:16:24,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:16:24,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:16:24,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510842095] [2024-06-21 17:16:24,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510842095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:16:24,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:16:24,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:16:24,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159436864] [2024-06-21 17:16:24,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:16:24,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:16:24,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:16:24,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:16:24,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:16:24,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:16:24,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 253 transitions, 3667 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:24,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:16:24,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:16:24,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:16:26,814 INFO L124 PetriNetUnfolderBase]: 6424/10236 cut-off events. [2024-06-21 17:16:26,815 INFO L125 PetriNetUnfolderBase]: For 266051/266067 co-relation queries the response was YES. [2024-06-21 17:16:27,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59084 conditions, 10236 events. 6424/10236 cut-off events. For 266051/266067 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 67635 event pairs, 2655 based on Foata normal form. 21/10255 useless extension candidates. Maximal degree in co-relation 59006. Up to 9238 conditions per place. [2024-06-21 17:16:27,038 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 234 selfloop transitions, 56 changer transitions 0/294 dead transitions. [2024-06-21 17:16:27,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 294 transitions, 4407 flow [2024-06-21 17:16:27,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:16:27,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:16:27,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 17:16:27,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-21 17:16:27,040 INFO L175 Difference]: Start difference. First operand has 160 places, 253 transitions, 3667 flow. Second operand 8 states and 143 transitions. [2024-06-21 17:16:27,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 294 transitions, 4407 flow [2024-06-21 17:16:27,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 294 transitions, 4286 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 17:16:27,428 INFO L231 Difference]: Finished difference. Result has 162 places, 254 transitions, 3690 flow [2024-06-21 17:16:27,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3546, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3690, PETRI_PLACES=162, PETRI_TRANSITIONS=254} [2024-06-21 17:16:27,428 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 119 predicate places. [2024-06-21 17:16:27,428 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 254 transitions, 3690 flow [2024-06-21 17:16:27,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:27,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:16:27,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:16:27,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 17:16:27,429 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:16:27,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:16:27,429 INFO L85 PathProgramCache]: Analyzing trace with hash -83964630, now seen corresponding path program 3 times [2024-06-21 17:16:27,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:16:27,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529250543] [2024-06-21 17:16:27,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:16:27,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:16:27,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:16:30,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:16:30,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:16:30,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529250543] [2024-06-21 17:16:30,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529250543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:16:30,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:16:30,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:16:30,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101597793] [2024-06-21 17:16:30,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:16:30,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:16:30,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:16:30,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:16:30,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:16:30,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:16:30,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 254 transitions, 3690 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:30,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:16:30,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:16:30,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:16:32,833 INFO L124 PetriNetUnfolderBase]: 6404/10204 cut-off events. [2024-06-21 17:16:32,833 INFO L125 PetriNetUnfolderBase]: For 273354/273370 co-relation queries the response was YES. [2024-06-21 17:16:32,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58933 conditions, 10204 events. 6404/10204 cut-off events. For 273354/273370 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 66990 event pairs, 2596 based on Foata normal form. 21/10223 useless extension candidates. Maximal degree in co-relation 58854. Up to 8414 conditions per place. [2024-06-21 17:16:32,904 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 225 selfloop transitions, 64 changer transitions 0/293 dead transitions. [2024-06-21 17:16:32,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 293 transitions, 4342 flow [2024-06-21 17:16:32,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:16:32,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:16:32,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 17:16:32,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-21 17:16:32,906 INFO L175 Difference]: Start difference. First operand has 162 places, 254 transitions, 3690 flow. Second operand 8 states and 141 transitions. [2024-06-21 17:16:32,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 293 transitions, 4342 flow [2024-06-21 17:16:33,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 293 transitions, 4212 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 17:16:33,309 INFO L231 Difference]: Finished difference. Result has 163 places, 253 transitions, 3630 flow [2024-06-21 17:16:33,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3498, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3630, PETRI_PLACES=163, PETRI_TRANSITIONS=253} [2024-06-21 17:16:33,310 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 120 predicate places. [2024-06-21 17:16:33,310 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 253 transitions, 3630 flow [2024-06-21 17:16:33,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:33,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:16:33,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:16:33,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 17:16:33,310 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:16:33,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:16:33,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1752833707, now seen corresponding path program 1 times [2024-06-21 17:16:33,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:16:33,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835711810] [2024-06-21 17:16:33,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:16:33,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:16:33,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:16:36,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:16:36,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:16:36,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835711810] [2024-06-21 17:16:36,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835711810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:16:36,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:16:36,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:16:36,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793776378] [2024-06-21 17:16:36,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:16:36,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:16:36,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:16:36,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:16:36,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:16:36,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:16:36,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 253 transitions, 3630 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:36,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:16:36,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:16:36,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:16:39,087 INFO L124 PetriNetUnfolderBase]: 6413/10219 cut-off events. [2024-06-21 17:16:39,087 INFO L125 PetriNetUnfolderBase]: For 281803/281807 co-relation queries the response was YES. [2024-06-21 17:16:39,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59414 conditions, 10219 events. 6413/10219 cut-off events. For 281803/281807 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 67701 event pairs, 2799 based on Foata normal form. 8/10226 useless extension candidates. Maximal degree in co-relation 59334. Up to 9950 conditions per place. [2024-06-21 17:16:39,170 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 255 selfloop transitions, 23 changer transitions 0/282 dead transitions. [2024-06-21 17:16:39,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 282 transitions, 4352 flow [2024-06-21 17:16:39,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:16:39,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:16:39,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-21 17:16:39,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 17:16:39,172 INFO L175 Difference]: Start difference. First operand has 163 places, 253 transitions, 3630 flow. Second operand 7 states and 112 transitions. [2024-06-21 17:16:39,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 282 transitions, 4352 flow [2024-06-21 17:16:39,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 282 transitions, 4207 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 17:16:39,708 INFO L231 Difference]: Finished difference. Result has 165 places, 260 transitions, 3652 flow [2024-06-21 17:16:39,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3487, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3652, PETRI_PLACES=165, PETRI_TRANSITIONS=260} [2024-06-21 17:16:39,709 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 122 predicate places. [2024-06-21 17:16:39,709 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 260 transitions, 3652 flow [2024-06-21 17:16:39,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:39,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:16:39,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:16:39,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 17:16:39,710 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:16:39,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:16:39,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1310341459, now seen corresponding path program 2 times [2024-06-21 17:16:39,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:16:39,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901777766] [2024-06-21 17:16:39,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:16:39,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:16:39,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:16:42,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:16:42,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:16:42,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901777766] [2024-06-21 17:16:42,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901777766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:16:42,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:16:42,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:16:42,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652827412] [2024-06-21 17:16:42,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:16:42,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:16:42,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:16:42,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:16:42,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:16:42,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:16:42,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 260 transitions, 3652 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:42,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:16:42,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:16:42,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:16:44,994 INFO L124 PetriNetUnfolderBase]: 6407/10211 cut-off events. [2024-06-21 17:16:44,994 INFO L125 PetriNetUnfolderBase]: For 291035/291041 co-relation queries the response was YES. [2024-06-21 17:16:45,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59229 conditions, 10211 events. 6407/10211 cut-off events. For 291035/291041 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 67635 event pairs, 2799 based on Foata normal form. 8/10218 useless extension candidates. Maximal degree in co-relation 59148. Up to 9936 conditions per place. [2024-06-21 17:16:45,069 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 252 selfloop transitions, 25 changer transitions 0/281 dead transitions. [2024-06-21 17:16:45,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 281 transitions, 4274 flow [2024-06-21 17:16:45,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:16:45,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:16:45,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-21 17:16:45,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-21 17:16:45,071 INFO L175 Difference]: Start difference. First operand has 165 places, 260 transitions, 3652 flow. Second operand 6 states and 101 transitions. [2024-06-21 17:16:45,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 281 transitions, 4274 flow [2024-06-21 17:16:45,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 281 transitions, 4195 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-21 17:16:45,578 INFO L231 Difference]: Finished difference. Result has 167 places, 260 transitions, 3636 flow [2024-06-21 17:16:45,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3573, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3636, PETRI_PLACES=167, PETRI_TRANSITIONS=260} [2024-06-21 17:16:45,579 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 124 predicate places. [2024-06-21 17:16:45,579 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 260 transitions, 3636 flow [2024-06-21 17:16:45,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:45,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:16:45,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:16:45,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 17:16:45,579 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:16:45,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:16:45,580 INFO L85 PathProgramCache]: Analyzing trace with hash 826291279, now seen corresponding path program 3 times [2024-06-21 17:16:45,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:16:45,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790814708] [2024-06-21 17:16:45,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:16:45,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:16:45,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:16:48,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:16:48,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:16:48,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790814708] [2024-06-21 17:16:48,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790814708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:16:48,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:16:48,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:16:48,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520778225] [2024-06-21 17:16:48,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:16:48,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:16:48,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:16:48,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:16:48,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:16:48,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:16:48,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 260 transitions, 3636 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:48,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:16:48,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:16:48,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:16:50,462 INFO L124 PetriNetUnfolderBase]: 6401/10219 cut-off events. [2024-06-21 17:16:50,463 INFO L125 PetriNetUnfolderBase]: For 302998/303010 co-relation queries the response was YES. [2024-06-21 17:16:50,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59506 conditions, 10219 events. 6401/10219 cut-off events. For 302998/303010 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 67892 event pairs, 2759 based on Foata normal form. 14/10232 useless extension candidates. Maximal degree in co-relation 59424. Up to 9914 conditions per place. [2024-06-21 17:16:50,541 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 245 selfloop transitions, 29 changer transitions 0/278 dead transitions. [2024-06-21 17:16:50,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 278 transitions, 4282 flow [2024-06-21 17:16:50,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:16:50,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:16:50,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-06-21 17:16:50,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.376984126984127 [2024-06-21 17:16:50,543 INFO L175 Difference]: Start difference. First operand has 167 places, 260 transitions, 3636 flow. Second operand 6 states and 95 transitions. [2024-06-21 17:16:50,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 278 transitions, 4282 flow [2024-06-21 17:16:51,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 278 transitions, 3990 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-21 17:16:51,004 INFO L231 Difference]: Finished difference. Result has 165 places, 263 transitions, 3464 flow [2024-06-21 17:16:51,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3344, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3464, PETRI_PLACES=165, PETRI_TRANSITIONS=263} [2024-06-21 17:16:51,004 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 122 predicate places. [2024-06-21 17:16:51,004 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 263 transitions, 3464 flow [2024-06-21 17:16:51,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:51,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:16:51,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:16:51,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 17:16:51,005 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:16:51,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:16:51,005 INFO L85 PathProgramCache]: Analyzing trace with hash 542148407, now seen corresponding path program 1 times [2024-06-21 17:16:51,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:16:51,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217663461] [2024-06-21 17:16:51,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:16:51,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:16:51,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:16:53,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:16:53,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:16:53,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217663461] [2024-06-21 17:16:53,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217663461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:16:53,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:16:53,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:16:53,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088157534] [2024-06-21 17:16:53,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:16:53,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:16:53,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:16:53,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:16:53,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:16:53,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:16:53,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 263 transitions, 3464 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:53,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:16:53,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:16:53,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:16:55,827 INFO L124 PetriNetUnfolderBase]: 6443/10265 cut-off events. [2024-06-21 17:16:55,827 INFO L125 PetriNetUnfolderBase]: For 301202/301204 co-relation queries the response was YES. [2024-06-21 17:16:55,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59693 conditions, 10265 events. 6443/10265 cut-off events. For 301202/301204 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 67917 event pairs, 2791 based on Foata normal form. 2/10266 useless extension candidates. Maximal degree in co-relation 59612. Up to 9909 conditions per place. [2024-06-21 17:16:55,932 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 271 selfloop transitions, 27 changer transitions 0/302 dead transitions. [2024-06-21 17:16:55,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 302 transitions, 4440 flow [2024-06-21 17:16:55,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:16:55,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:16:55,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-21 17:16:55,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-21 17:16:55,934 INFO L175 Difference]: Start difference. First operand has 165 places, 263 transitions, 3464 flow. Second operand 7 states and 124 transitions. [2024-06-21 17:16:55,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 302 transitions, 4440 flow [2024-06-21 17:16:56,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 302 transitions, 4342 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-21 17:16:56,482 INFO L231 Difference]: Finished difference. Result has 169 places, 274 transitions, 3615 flow [2024-06-21 17:16:56,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3366, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3615, PETRI_PLACES=169, PETRI_TRANSITIONS=274} [2024-06-21 17:16:56,482 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-21 17:16:56,482 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 274 transitions, 3615 flow [2024-06-21 17:16:56,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:56,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:16:56,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:16:56,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 17:16:56,483 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:16:56,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:16:56,483 INFO L85 PathProgramCache]: Analyzing trace with hash 542268563, now seen corresponding path program 1 times [2024-06-21 17:16:56,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:16:56,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047778126] [2024-06-21 17:16:56,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:16:56,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:16:56,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:16:58,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:16:58,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:16:58,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047778126] [2024-06-21 17:16:58,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047778126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:16:58,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:16:58,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:16:58,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351095362] [2024-06-21 17:16:58,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:16:58,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:16:58,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:16:58,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:16:58,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:16:58,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:16:58,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 274 transitions, 3615 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:16:58,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:16:58,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:16:58,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:17:00,899 INFO L124 PetriNetUnfolderBase]: 6534/10392 cut-off events. [2024-06-21 17:17:00,899 INFO L125 PetriNetUnfolderBase]: For 327609/327611 co-relation queries the response was YES. [2024-06-21 17:17:00,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62283 conditions, 10392 events. 6534/10392 cut-off events. For 327609/327611 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 68871 event pairs, 2857 based on Foata normal form. 6/10397 useless extension candidates. Maximal degree in co-relation 62200. Up to 10088 conditions per place. [2024-06-21 17:17:00,976 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 279 selfloop transitions, 24 changer transitions 0/307 dead transitions. [2024-06-21 17:17:00,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 307 transitions, 4521 flow [2024-06-21 17:17:00,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:17:00,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:17:00,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-21 17:17:00,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-21 17:17:00,978 INFO L175 Difference]: Start difference. First operand has 169 places, 274 transitions, 3615 flow. Second operand 8 states and 125 transitions. [2024-06-21 17:17:00,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 307 transitions, 4521 flow [2024-06-21 17:17:01,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 307 transitions, 4415 flow, removed 48 selfloop flow, removed 2 redundant places. [2024-06-21 17:17:01,420 INFO L231 Difference]: Finished difference. Result has 176 places, 285 transitions, 3757 flow [2024-06-21 17:17:01,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3531, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3757, PETRI_PLACES=176, PETRI_TRANSITIONS=285} [2024-06-21 17:17:01,421 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 133 predicate places. [2024-06-21 17:17:01,421 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 285 transitions, 3757 flow [2024-06-21 17:17:01,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:01,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:17:01,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:17:01,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 17:17:01,421 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:17:01,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:17:01,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1515523275, now seen corresponding path program 2 times [2024-06-21 17:17:01,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:17:01,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905752311] [2024-06-21 17:17:01,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:17:01,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:17:01,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:17:03,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:17:03,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:17:03,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905752311] [2024-06-21 17:17:03,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905752311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:17:03,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:17:03,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:17:03,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074269056] [2024-06-21 17:17:03,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:17:03,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:17:03,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:17:03,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:17:03,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:17:03,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:17:03,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 285 transitions, 3757 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:03,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:17:03,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:17:03,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:17:06,047 INFO L124 PetriNetUnfolderBase]: 6508/10356 cut-off events. [2024-06-21 17:17:06,048 INFO L125 PetriNetUnfolderBase]: For 339436/339438 co-relation queries the response was YES. [2024-06-21 17:17:06,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62255 conditions, 10356 events. 6508/10356 cut-off events. For 339436/339438 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 68687 event pairs, 2856 based on Foata normal form. 6/10361 useless extension candidates. Maximal degree in co-relation 62169. Up to 10069 conditions per place. [2024-06-21 17:17:06,140 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 278 selfloop transitions, 24 changer transitions 0/306 dead transitions. [2024-06-21 17:17:06,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 306 transitions, 4419 flow [2024-06-21 17:17:06,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:17:06,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:17:06,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-21 17:17:06,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-21 17:17:06,142 INFO L175 Difference]: Start difference. First operand has 176 places, 285 transitions, 3757 flow. Second operand 8 states and 124 transitions. [2024-06-21 17:17:06,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 306 transitions, 4419 flow [2024-06-21 17:17:06,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 306 transitions, 4309 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-21 17:17:06,749 INFO L231 Difference]: Finished difference. Result has 180 places, 285 transitions, 3703 flow [2024-06-21 17:17:06,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3647, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3703, PETRI_PLACES=180, PETRI_TRANSITIONS=285} [2024-06-21 17:17:06,756 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 137 predicate places. [2024-06-21 17:17:06,756 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 285 transitions, 3703 flow [2024-06-21 17:17:06,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:06,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:17:06,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:17:06,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 17:17:06,757 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:17:06,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:17:06,757 INFO L85 PathProgramCache]: Analyzing trace with hash 826297231, now seen corresponding path program 2 times [2024-06-21 17:17:06,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:17:06,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791143507] [2024-06-21 17:17:06,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:17:06,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:17:06,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:17:09,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:17:09,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:17:09,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791143507] [2024-06-21 17:17:09,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791143507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:17:09,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:17:09,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:17:09,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912272702] [2024-06-21 17:17:09,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:17:09,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:17:09,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:17:09,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:17:09,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:17:09,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:17:09,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 285 transitions, 3703 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:09,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:17:09,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:17:09,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:17:11,259 INFO L124 PetriNetUnfolderBase]: 6550/10415 cut-off events. [2024-06-21 17:17:11,259 INFO L125 PetriNetUnfolderBase]: For 354661/354665 co-relation queries the response was YES. [2024-06-21 17:17:11,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63011 conditions, 10415 events. 6550/10415 cut-off events. For 354661/354665 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 68808 event pairs, 2806 based on Foata normal form. 4/10418 useless extension candidates. Maximal degree in co-relation 62924. Up to 10017 conditions per place. [2024-06-21 17:17:11,356 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 272 selfloop transitions, 38 changer transitions 0/314 dead transitions. [2024-06-21 17:17:11,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 314 transitions, 4619 flow [2024-06-21 17:17:11,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:17:11,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:17:11,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-21 17:17:11,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-21 17:17:11,357 INFO L175 Difference]: Start difference. First operand has 180 places, 285 transitions, 3703 flow. Second operand 7 states and 118 transitions. [2024-06-21 17:17:11,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 314 transitions, 4619 flow [2024-06-21 17:17:11,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 314 transitions, 4571 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 17:17:11,993 INFO L231 Difference]: Finished difference. Result has 181 places, 291 transitions, 3845 flow [2024-06-21 17:17:11,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3655, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3845, PETRI_PLACES=181, PETRI_TRANSITIONS=291} [2024-06-21 17:17:11,994 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 138 predicate places. [2024-06-21 17:17:11,995 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 291 transitions, 3845 flow [2024-06-21 17:17:11,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:11,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:17:11,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:17:11,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 17:17:11,995 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:17:11,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:17:11,995 INFO L85 PathProgramCache]: Analyzing trace with hash 851084521, now seen corresponding path program 3 times [2024-06-21 17:17:11,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:17:11,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122046417] [2024-06-21 17:17:11,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:17:11,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:17:12,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:17:14,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:17:14,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:17:14,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122046417] [2024-06-21 17:17:14,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122046417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:17:14,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:17:14,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:17:14,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849379407] [2024-06-21 17:17:14,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:17:14,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:17:14,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:17:14,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:17:14,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:17:14,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:17:14,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 291 transitions, 3845 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:14,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:17:14,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:17:14,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:17:16,548 INFO L124 PetriNetUnfolderBase]: 6540/10402 cut-off events. [2024-06-21 17:17:16,548 INFO L125 PetriNetUnfolderBase]: For 370135/370137 co-relation queries the response was YES. [2024-06-21 17:17:16,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63383 conditions, 10402 events. 6540/10402 cut-off events. For 370135/370137 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 68741 event pairs, 2802 based on Foata normal form. 6/10407 useless extension candidates. Maximal degree in co-relation 63294. Up to 10014 conditions per place. [2024-06-21 17:17:16,626 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 275 selfloop transitions, 39 changer transitions 0/318 dead transitions. [2024-06-21 17:17:16,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 318 transitions, 4625 flow [2024-06-21 17:17:16,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:17:16,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:17:16,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 17:17:16,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-21 17:17:16,628 INFO L175 Difference]: Start difference. First operand has 181 places, 291 transitions, 3845 flow. Second operand 8 states and 132 transitions. [2024-06-21 17:17:16,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 318 transitions, 4625 flow [2024-06-21 17:17:17,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 318 transitions, 4545 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-21 17:17:17,227 INFO L231 Difference]: Finished difference. Result has 186 places, 291 transitions, 3857 flow [2024-06-21 17:17:17,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3765, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3857, PETRI_PLACES=186, PETRI_TRANSITIONS=291} [2024-06-21 17:17:17,228 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 143 predicate places. [2024-06-21 17:17:17,228 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 291 transitions, 3857 flow [2024-06-21 17:17:17,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:17,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:17:17,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:17:17,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 17:17:17,229 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:17:17,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:17:17,229 INFO L85 PathProgramCache]: Analyzing trace with hash 826059895, now seen corresponding path program 3 times [2024-06-21 17:17:17,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:17:17,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391895994] [2024-06-21 17:17:17,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:17:17,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:17:17,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:17:19,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:17:19,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:17:19,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391895994] [2024-06-21 17:17:19,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391895994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:17:19,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:17:19,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:17:19,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998713008] [2024-06-21 17:17:19,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:17:19,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:17:19,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:17:19,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:17:19,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:17:19,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:17:19,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 291 transitions, 3857 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:19,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:17:19,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:17:19,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:17:21,740 INFO L124 PetriNetUnfolderBase]: 6514/10366 cut-off events. [2024-06-21 17:17:21,740 INFO L125 PetriNetUnfolderBase]: For 382906/382908 co-relation queries the response was YES. [2024-06-21 17:17:21,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63405 conditions, 10366 events. 6514/10366 cut-off events. For 382906/382908 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 68546 event pairs, 2799 based on Foata normal form. 6/10371 useless extension candidates. Maximal degree in co-relation 63315. Up to 9995 conditions per place. [2024-06-21 17:17:21,837 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 273 selfloop transitions, 40 changer transitions 0/317 dead transitions. [2024-06-21 17:17:21,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 317 transitions, 4557 flow [2024-06-21 17:17:21,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:17:21,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:17:21,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-21 17:17:21,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-21 17:17:21,838 INFO L175 Difference]: Start difference. First operand has 186 places, 291 transitions, 3857 flow. Second operand 8 states and 130 transitions. [2024-06-21 17:17:21,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 317 transitions, 4557 flow [2024-06-21 17:17:22,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 317 transitions, 4433 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-21 17:17:22,547 INFO L231 Difference]: Finished difference. Result has 187 places, 291 transitions, 3832 flow [2024-06-21 17:17:22,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3733, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3832, PETRI_PLACES=187, PETRI_TRANSITIONS=291} [2024-06-21 17:17:22,548 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-21 17:17:22,548 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 291 transitions, 3832 flow [2024-06-21 17:17:22,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:22,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:17:22,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:17:22,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 17:17:22,549 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:17:22,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:17:22,549 INFO L85 PathProgramCache]: Analyzing trace with hash 826306159, now seen corresponding path program 1 times [2024-06-21 17:17:22,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:17:22,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500933153] [2024-06-21 17:17:22,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:17:22,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:17:22,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:17:25,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:17:25,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:17:25,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500933153] [2024-06-21 17:17:25,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500933153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:17:25,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:17:25,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:17:25,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554888522] [2024-06-21 17:17:25,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:17:25,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:17:25,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:17:25,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:17:25,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:17:25,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:17:25,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 291 transitions, 3832 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:25,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:17:25,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:17:25,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:17:27,755 INFO L124 PetriNetUnfolderBase]: 6509/10356 cut-off events. [2024-06-21 17:17:27,755 INFO L125 PetriNetUnfolderBase]: For 394820/394822 co-relation queries the response was YES. [2024-06-21 17:17:27,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63675 conditions, 10356 events. 6509/10356 cut-off events. For 394820/394822 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 68382 event pairs, 2854 based on Foata normal form. 2/10357 useless extension candidates. Maximal degree in co-relation 63584. Up to 10121 conditions per place. [2024-06-21 17:17:27,841 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 290 selfloop transitions, 12 changer transitions 0/306 dead transitions. [2024-06-21 17:17:27,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 306 transitions, 4504 flow [2024-06-21 17:17:27,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:17:27,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:17:27,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 92 transitions. [2024-06-21 17:17:27,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-21 17:17:27,842 INFO L175 Difference]: Start difference. First operand has 187 places, 291 transitions, 3832 flow. Second operand 6 states and 92 transitions. [2024-06-21 17:17:27,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 306 transitions, 4504 flow [2024-06-21 17:17:28,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 306 transitions, 4399 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-21 17:17:28,371 INFO L231 Difference]: Finished difference. Result has 184 places, 293 transitions, 3792 flow [2024-06-21 17:17:28,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3727, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3792, PETRI_PLACES=184, PETRI_TRANSITIONS=293} [2024-06-21 17:17:28,371 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-21 17:17:28,371 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 293 transitions, 3792 flow [2024-06-21 17:17:28,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:28,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:17:28,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:17:28,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 17:17:28,372 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:17:28,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:17:28,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1580637886, now seen corresponding path program 1 times [2024-06-21 17:17:28,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:17:28,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60705742] [2024-06-21 17:17:28,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:17:28,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:17:28,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:17:31,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:17:31,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:17:31,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60705742] [2024-06-21 17:17:31,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60705742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:17:31,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:17:31,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:17:31,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74858602] [2024-06-21 17:17:31,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:17:31,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:17:31,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:17:31,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:17:31,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:17:31,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:17:31,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 293 transitions, 3792 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:31,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:17:31,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:17:31,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:17:33,604 INFO L124 PetriNetUnfolderBase]: 6669/10594 cut-off events. [2024-06-21 17:17:33,604 INFO L125 PetriNetUnfolderBase]: For 406082/406096 co-relation queries the response was YES. [2024-06-21 17:17:33,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65213 conditions, 10594 events. 6669/10594 cut-off events. For 406082/406096 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 70155 event pairs, 2699 based on Foata normal form. 30/10623 useless extension candidates. Maximal degree in co-relation 65122. Up to 9997 conditions per place. [2024-06-21 17:17:33,710 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 262 selfloop transitions, 81 changer transitions 4/351 dead transitions. [2024-06-21 17:17:33,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 351 transitions, 4952 flow [2024-06-21 17:17:33,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:17:33,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:17:33,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 17:17:33,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-21 17:17:33,711 INFO L175 Difference]: Start difference. First operand has 184 places, 293 transitions, 3792 flow. Second operand 9 states and 154 transitions. [2024-06-21 17:17:33,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 351 transitions, 4952 flow [2024-06-21 17:17:34,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 351 transitions, 4903 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-21 17:17:34,425 INFO L231 Difference]: Finished difference. Result has 190 places, 314 transitions, 4280 flow [2024-06-21 17:17:34,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3743, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4280, PETRI_PLACES=190, PETRI_TRANSITIONS=314} [2024-06-21 17:17:34,425 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 147 predicate places. [2024-06-21 17:17:34,425 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 314 transitions, 4280 flow [2024-06-21 17:17:34,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:34,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:17:34,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:17:34,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 17:17:34,426 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:17:34,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:17:34,426 INFO L85 PathProgramCache]: Analyzing trace with hash -534406594, now seen corresponding path program 2 times [2024-06-21 17:17:34,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:17:34,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460303710] [2024-06-21 17:17:34,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:17:34,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:17:34,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:17:37,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:17:37,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:17:37,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460303710] [2024-06-21 17:17:37,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460303710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:17:37,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:17:37,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:17:37,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511992202] [2024-06-21 17:17:37,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:17:37,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:17:37,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:17:37,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:17:37,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:17:37,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:17:37,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 314 transitions, 4280 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:37,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:17:37,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:17:37,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:17:40,558 INFO L124 PetriNetUnfolderBase]: 7124/11277 cut-off events. [2024-06-21 17:17:40,558 INFO L125 PetriNetUnfolderBase]: For 450863/450871 co-relation queries the response was YES. [2024-06-21 17:17:40,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71554 conditions, 11277 events. 7124/11277 cut-off events. For 450863/450871 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 74689 event pairs, 2641 based on Foata normal form. 22/11298 useless extension candidates. Maximal degree in co-relation 71461. Up to 9707 conditions per place. [2024-06-21 17:17:40,666 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 245 selfloop transitions, 145 changer transitions 1/395 dead transitions. [2024-06-21 17:17:40,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 395 transitions, 6069 flow [2024-06-21 17:17:40,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:17:40,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:17:40,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-21 17:17:40,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976190476190476 [2024-06-21 17:17:40,668 INFO L175 Difference]: Start difference. First operand has 190 places, 314 transitions, 4280 flow. Second operand 10 states and 167 transitions. [2024-06-21 17:17:40,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 395 transitions, 6069 flow [2024-06-21 17:17:41,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 395 transitions, 5853 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-21 17:17:41,472 INFO L231 Difference]: Finished difference. Result has 198 places, 359 transitions, 5271 flow [2024-06-21 17:17:41,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4086, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5271, PETRI_PLACES=198, PETRI_TRANSITIONS=359} [2024-06-21 17:17:41,472 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 155 predicate places. [2024-06-21 17:17:41,472 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 359 transitions, 5271 flow [2024-06-21 17:17:41,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:41,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:17:41,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:17:41,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 17:17:41,473 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)] === [2024-06-21 17:17:41,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:17:41,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1571372296, now seen corresponding path program 3 times [2024-06-21 17:17:41,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:17:41,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701778086] [2024-06-21 17:17:41,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:17:41,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:17:41,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:17:44,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:17:44,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:17:44,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701778086] [2024-06-21 17:17:44,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701778086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:17:44,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:17:44,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:17:44,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358376343] [2024-06-21 17:17:44,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:17:44,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:17:44,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:17:44,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:17:44,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:17:44,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:17:44,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 359 transitions, 5271 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:44,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:17:44,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:17:44,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:17:47,162 INFO L124 PetriNetUnfolderBase]: 7092/11289 cut-off events. [2024-06-21 17:17:47,163 INFO L125 PetriNetUnfolderBase]: For 459832/459840 co-relation queries the response was YES. [2024-06-21 17:17:47,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73143 conditions, 11289 events. 7092/11289 cut-off events. For 459832/459840 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 75249 event pairs, 2567 based on Foata normal form. 22/11310 useless extension candidates. Maximal degree in co-relation 73046. Up to 9701 conditions per place. [2024-06-21 17:17:47,259 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 246 selfloop transitions, 142 changer transitions 0/392 dead transitions. [2024-06-21 17:17:47,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 392 transitions, 6256 flow [2024-06-21 17:17:47,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:17:47,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:17:47,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-21 17:17:47,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-21 17:17:47,261 INFO L175 Difference]: Start difference. First operand has 198 places, 359 transitions, 5271 flow. Second operand 9 states and 152 transitions. [2024-06-21 17:17:47,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 392 transitions, 6256 flow [2024-06-21 17:17:48,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 392 transitions, 6094 flow, removed 70 selfloop flow, removed 3 redundant places. [2024-06-21 17:17:48,084 INFO L231 Difference]: Finished difference. Result has 206 places, 364 transitions, 5570 flow [2024-06-21 17:17:48,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5109, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5570, PETRI_PLACES=206, PETRI_TRANSITIONS=364} [2024-06-21 17:17:48,084 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 163 predicate places. [2024-06-21 17:17:48,084 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 364 transitions, 5570 flow [2024-06-21 17:17:48,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:48,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:17:48,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:17:48,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 17:17:48,085 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:17:48,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:17:48,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1965889594, now seen corresponding path program 4 times [2024-06-21 17:17:48,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:17:48,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306875994] [2024-06-21 17:17:48,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:17:48,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:17:48,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:17:51,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:17:51,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:17:51,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306875994] [2024-06-21 17:17:51,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306875994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:17:51,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:17:51,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:17:51,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031235156] [2024-06-21 17:17:51,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:17:51,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:17:51,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:17:51,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:17:51,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:17:51,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:17:51,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 364 transitions, 5570 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:51,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:17:51,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:17:51,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:17:54,171 INFO L124 PetriNetUnfolderBase]: 7132/11357 cut-off events. [2024-06-21 17:17:54,172 INFO L125 PetriNetUnfolderBase]: For 477716/477730 co-relation queries the response was YES. [2024-06-21 17:17:54,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75530 conditions, 11357 events. 7132/11357 cut-off events. For 477716/477730 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 75778 event pairs, 2586 based on Foata normal form. 22/11378 useless extension candidates. Maximal degree in co-relation 75430. Up to 9084 conditions per place. [2024-06-21 17:17:54,266 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 195 selfloop transitions, 216 changer transitions 1/416 dead transitions. [2024-06-21 17:17:54,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 416 transitions, 6804 flow [2024-06-21 17:17:54,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:17:54,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:17:54,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 17:17:54,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-21 17:17:54,268 INFO L175 Difference]: Start difference. First operand has 206 places, 364 transitions, 5570 flow. Second operand 9 states and 173 transitions. [2024-06-21 17:17:54,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 416 transitions, 6804 flow [2024-06-21 17:17:55,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 416 transitions, 6608 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 17:17:55,045 INFO L231 Difference]: Finished difference. Result has 210 places, 368 transitions, 5919 flow [2024-06-21 17:17:55,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5374, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5919, PETRI_PLACES=210, PETRI_TRANSITIONS=368} [2024-06-21 17:17:55,046 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 167 predicate places. [2024-06-21 17:17:55,046 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 368 transitions, 5919 flow [2024-06-21 17:17:55,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:55,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:17:55,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:17:55,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 17:17:55,047 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:17:55,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:17:55,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1965503644, now seen corresponding path program 5 times [2024-06-21 17:17:55,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:17:55,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590728654] [2024-06-21 17:17:55,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:17:55,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:17:55,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:17:58,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:17:58,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:17:58,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590728654] [2024-06-21 17:17:58,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590728654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:17:58,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:17:58,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:17:58,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19909446] [2024-06-21 17:17:58,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:17:58,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:17:58,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:17:58,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:17:58,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:17:58,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:17:58,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 368 transitions, 5919 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:17:58,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:17:58,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:17:58,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:18:00,992 INFO L124 PetriNetUnfolderBase]: 7356/11695 cut-off events. [2024-06-21 17:18:00,993 INFO L125 PetriNetUnfolderBase]: For 525365/525381 co-relation queries the response was YES. [2024-06-21 17:18:01,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79792 conditions, 11695 events. 7356/11695 cut-off events. For 525365/525381 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 78263 event pairs, 1975 based on Foata normal form. 17/11710 useless extension candidates. Maximal degree in co-relation 79691. Up to 8913 conditions per place. [2024-06-21 17:18:01,086 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 183 selfloop transitions, 228 changer transitions 0/415 dead transitions. [2024-06-21 17:18:01,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 415 transitions, 7373 flow [2024-06-21 17:18:01,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:18:01,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:18:01,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 17:18:01,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 17:18:01,088 INFO L175 Difference]: Start difference. First operand has 210 places, 368 transitions, 5919 flow. Second operand 8 states and 144 transitions. [2024-06-21 17:18:01,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 415 transitions, 7373 flow [2024-06-21 17:18:02,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 415 transitions, 7012 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 17:18:02,088 INFO L231 Difference]: Finished difference. Result has 213 places, 385 transitions, 6421 flow [2024-06-21 17:18:02,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5564, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6421, PETRI_PLACES=213, PETRI_TRANSITIONS=385} [2024-06-21 17:18:02,088 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 170 predicate places. [2024-06-21 17:18:02,089 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 385 transitions, 6421 flow [2024-06-21 17:18:02,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:02,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:18:02,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:18:02,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 17:18:02,089 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:18:02,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:18:02,090 INFO L85 PathProgramCache]: Analyzing trace with hash 966186046, now seen corresponding path program 6 times [2024-06-21 17:18:02,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:18:02,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181552123] [2024-06-21 17:18:02,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:18:02,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:18:02,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:18:05,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:18:05,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:18:05,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181552123] [2024-06-21 17:18:05,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181552123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:18:05,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:18:05,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:18:05,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519642896] [2024-06-21 17:18:05,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:18:05,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:18:05,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:18:05,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:18:05,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:18:05,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:18:05,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 385 transitions, 6421 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:05,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:18:05,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:18:05,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:18:08,015 INFO L124 PetriNetUnfolderBase]: 7344/11685 cut-off events. [2024-06-21 17:18:08,015 INFO L125 PetriNetUnfolderBase]: For 529219/529227 co-relation queries the response was YES. [2024-06-21 17:18:08,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82343 conditions, 11685 events. 7344/11685 cut-off events. For 529219/529227 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 78251 event pairs, 2599 based on Foata normal form. 14/11698 useless extension candidates. Maximal degree in co-relation 82240. Up to 9397 conditions per place. [2024-06-21 17:18:08,141 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 214 selfloop transitions, 198 changer transitions 0/416 dead transitions. [2024-06-21 17:18:08,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 416 transitions, 7419 flow [2024-06-21 17:18:08,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:18:08,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:18:08,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 17:18:08,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 17:18:08,143 INFO L175 Difference]: Start difference. First operand has 213 places, 385 transitions, 6421 flow. Second operand 8 states and 144 transitions. [2024-06-21 17:18:08,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 416 transitions, 7419 flow [2024-06-21 17:18:09,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 416 transitions, 7159 flow, removed 63 selfloop flow, removed 3 redundant places. [2024-06-21 17:18:09,436 INFO L231 Difference]: Finished difference. Result has 218 places, 385 transitions, 6580 flow [2024-06-21 17:18:09,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6161, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6580, PETRI_PLACES=218, PETRI_TRANSITIONS=385} [2024-06-21 17:18:09,436 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-21 17:18:09,437 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 385 transitions, 6580 flow [2024-06-21 17:18:09,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:09,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:18:09,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:18:09,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 17:18:09,437 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:18:09,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:18:09,438 INFO L85 PathProgramCache]: Analyzing trace with hash 671296298, now seen corresponding path program 1 times [2024-06-21 17:18:09,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:18:09,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757801226] [2024-06-21 17:18:09,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:18:09,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:18:09,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:18:11,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:18:11,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:18:11,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757801226] [2024-06-21 17:18:11,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757801226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:18:11,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:18:11,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:18:11,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531112607] [2024-06-21 17:18:11,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:18:11,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:18:11,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:18:11,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:18:11,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:18:11,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:18:11,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 385 transitions, 6580 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:11,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:18:11,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:18:11,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:18:14,812 INFO L124 PetriNetUnfolderBase]: 7332/11666 cut-off events. [2024-06-21 17:18:14,812 INFO L125 PetriNetUnfolderBase]: For 547822/547824 co-relation queries the response was YES. [2024-06-21 17:18:14,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82608 conditions, 11666 events. 7332/11666 cut-off events. For 547822/547824 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 78089 event pairs, 2972 based on Foata normal form. 4/11669 useless extension candidates. Maximal degree in co-relation 82504. Up to 11129 conditions per place. [2024-06-21 17:18:14,926 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 367 selfloop transitions, 43 changer transitions 0/414 dead transitions. [2024-06-21 17:18:14,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 414 transitions, 7480 flow [2024-06-21 17:18:14,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:18:14,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:18:14,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 17:18:14,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-21 17:18:14,927 INFO L175 Difference]: Start difference. First operand has 218 places, 385 transitions, 6580 flow. Second operand 8 states and 135 transitions. [2024-06-21 17:18:14,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 414 transitions, 7480 flow [2024-06-21 17:18:16,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 414 transitions, 6855 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-21 17:18:16,033 INFO L231 Difference]: Finished difference. Result has 217 places, 385 transitions, 6047 flow [2024-06-21 17:18:16,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5955, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6047, PETRI_PLACES=217, PETRI_TRANSITIONS=385} [2024-06-21 17:18:16,034 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 174 predicate places. [2024-06-21 17:18:16,034 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 385 transitions, 6047 flow [2024-06-21 17:18:16,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:16,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:18:16,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:18:16,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 17:18:16,035 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:18:16,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:18:16,035 INFO L85 PathProgramCache]: Analyzing trace with hash -492132782, now seen corresponding path program 1 times [2024-06-21 17:18:16,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:18:16,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730662445] [2024-06-21 17:18:16,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:18:16,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:18:16,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:18:18,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:18:18,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:18:18,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730662445] [2024-06-21 17:18:18,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730662445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:18:18,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:18:18,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:18:18,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262675852] [2024-06-21 17:18:18,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:18:18,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:18:18,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:18:18,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:18:18,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:18:18,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:18:18,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 385 transitions, 6047 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:18,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:18:18,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:18:18,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:18:21,911 INFO L124 PetriNetUnfolderBase]: 7512/11862 cut-off events. [2024-06-21 17:18:21,912 INFO L125 PetriNetUnfolderBase]: For 553050/553054 co-relation queries the response was YES. [2024-06-21 17:18:22,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83018 conditions, 11862 events. 7512/11862 cut-off events. For 553050/553054 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 78795 event pairs, 2563 based on Foata normal form. 6/11867 useless extension candidates. Maximal degree in co-relation 82913. Up to 9425 conditions per place. [2024-06-21 17:18:22,061 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 222 selfloop transitions, 218 changer transitions 0/444 dead transitions. [2024-06-21 17:18:22,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 444 transitions, 7507 flow [2024-06-21 17:18:22,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:18:22,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:18:22,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-21 17:18:22,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-06-21 17:18:22,067 INFO L175 Difference]: Start difference. First operand has 217 places, 385 transitions, 6047 flow. Second operand 10 states and 181 transitions. [2024-06-21 17:18:22,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 444 transitions, 7507 flow [2024-06-21 17:18:23,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 444 transitions, 7334 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-21 17:18:23,282 INFO L231 Difference]: Finished difference. Result has 219 places, 396 transitions, 6560 flow [2024-06-21 17:18:23,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5878, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6560, PETRI_PLACES=219, PETRI_TRANSITIONS=396} [2024-06-21 17:18:23,282 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-21 17:18:23,283 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 396 transitions, 6560 flow [2024-06-21 17:18:23,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:23,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:18:23,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:18:23,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 17:18:23,283 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:18:23,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:18:23,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1645264460, now seen corresponding path program 1 times [2024-06-21 17:18:23,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:18:23,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860543550] [2024-06-21 17:18:23,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:18:23,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:18:23,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:18:26,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:18:26,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:18:26,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860543550] [2024-06-21 17:18:26,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860543550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:18:26,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:18:26,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:18:26,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275391806] [2024-06-21 17:18:26,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:18:26,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:18:26,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:18:26,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:18:26,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:18:26,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:18:26,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 396 transitions, 6560 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:26,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:18:26,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:18:26,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:18:29,124 INFO L124 PetriNetUnfolderBase]: 7720/12166 cut-off events. [2024-06-21 17:18:29,125 INFO L125 PetriNetUnfolderBase]: For 594346/594350 co-relation queries the response was YES. [2024-06-21 17:18:29,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88706 conditions, 12166 events. 7720/12166 cut-off events. For 594346/594350 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 80684 event pairs, 2901 based on Foata normal form. 38/12203 useless extension candidates. Maximal degree in co-relation 88601. Up to 11295 conditions per place. [2024-06-21 17:18:29,237 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 337 selfloop transitions, 108 changer transitions 6/455 dead transitions. [2024-06-21 17:18:29,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 455 transitions, 8162 flow [2024-06-21 17:18:29,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:18:29,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:18:29,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 17:18:29,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-21 17:18:29,239 INFO L175 Difference]: Start difference. First operand has 219 places, 396 transitions, 6560 flow. Second operand 9 states and 151 transitions. [2024-06-21 17:18:29,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 455 transitions, 8162 flow [2024-06-21 17:18:30,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 455 transitions, 7865 flow, removed 61 selfloop flow, removed 6 redundant places. [2024-06-21 17:18:30,341 INFO L231 Difference]: Finished difference. Result has 224 places, 420 transitions, 7088 flow [2024-06-21 17:18:30,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6287, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7088, PETRI_PLACES=224, PETRI_TRANSITIONS=420} [2024-06-21 17:18:30,341 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 181 predicate places. [2024-06-21 17:18:30,342 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 420 transitions, 7088 flow [2024-06-21 17:18:30,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:30,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:18:30,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:18:30,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 17:18:30,342 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:18:30,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:18:30,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1468132940, now seen corresponding path program 2 times [2024-06-21 17:18:30,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:18:30,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102383960] [2024-06-21 17:18:30,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:18:30,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:18:30,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:18:33,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:18:33,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:18:33,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102383960] [2024-06-21 17:18:33,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102383960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:18:33,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:18:33,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:18:33,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089243905] [2024-06-21 17:18:33,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:18:33,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:18:33,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:18:33,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:18:33,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:18:33,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:18:33,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 420 transitions, 7088 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:33,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:18:33,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:18:33,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:18:36,761 INFO L124 PetriNetUnfolderBase]: 7568/11993 cut-off events. [2024-06-21 17:18:36,762 INFO L125 PetriNetUnfolderBase]: For 556880/556892 co-relation queries the response was YES. [2024-06-21 17:18:36,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85370 conditions, 11993 events. 7568/11993 cut-off events. For 556880/556892 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 80009 event pairs, 2786 based on Foata normal form. 34/12026 useless extension candidates. Maximal degree in co-relation 85262. Up to 10311 conditions per place. [2024-06-21 17:18:36,878 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 282 selfloop transitions, 170 changer transitions 2/458 dead transitions. [2024-06-21 17:18:36,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 458 transitions, 8446 flow [2024-06-21 17:18:36,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:18:36,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:18:36,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-21 17:18:36,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976190476190476 [2024-06-21 17:18:36,897 INFO L175 Difference]: Start difference. First operand has 224 places, 420 transitions, 7088 flow. Second operand 10 states and 167 transitions. [2024-06-21 17:18:36,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 458 transitions, 8446 flow [2024-06-21 17:18:38,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 458 transitions, 8249 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 17:18:38,119 INFO L231 Difference]: Finished difference. Result has 229 places, 426 transitions, 7397 flow [2024-06-21 17:18:38,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6891, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7397, PETRI_PLACES=229, PETRI_TRANSITIONS=426} [2024-06-21 17:18:38,119 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-21 17:18:38,119 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 426 transitions, 7397 flow [2024-06-21 17:18:38,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:38,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:18:38,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:18:38,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 17:18:38,124 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:18:38,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:18:38,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1467895790, now seen corresponding path program 3 times [2024-06-21 17:18:38,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:18:38,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692510024] [2024-06-21 17:18:38,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:18:38,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:18:38,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:18:41,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:18:41,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:18:41,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692510024] [2024-06-21 17:18:41,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692510024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:18:41,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:18:41,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:18:41,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765525122] [2024-06-21 17:18:41,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:18:41,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:18:41,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:18:41,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:18:41,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:18:41,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:18:41,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 426 transitions, 7397 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:41,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:18:41,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:18:41,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:18:44,387 INFO L124 PetriNetUnfolderBase]: 7496/11913 cut-off events. [2024-06-21 17:18:44,387 INFO L125 PetriNetUnfolderBase]: For 554769/554781 co-relation queries the response was YES. [2024-06-21 17:18:44,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85101 conditions, 11913 events. 7496/11913 cut-off events. For 554769/554781 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 79754 event pairs, 2705 based on Foata normal form. 18/11930 useless extension candidates. Maximal degree in co-relation 84992. Up to 10279 conditions per place. [2024-06-21 17:18:44,520 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 281 selfloop transitions, 164 changer transitions 4/453 dead transitions. [2024-06-21 17:18:44,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 453 transitions, 8459 flow [2024-06-21 17:18:44,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:18:44,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:18:44,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-21 17:18:44,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-21 17:18:44,522 INFO L175 Difference]: Start difference. First operand has 229 places, 426 transitions, 7397 flow. Second operand 9 states and 150 transitions. [2024-06-21 17:18:44,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 453 transitions, 8459 flow [2024-06-21 17:18:46,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 453 transitions, 8238 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-21 17:18:46,045 INFO L231 Difference]: Finished difference. Result has 233 places, 422 transitions, 7426 flow [2024-06-21 17:18:46,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7176, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7426, PETRI_PLACES=233, PETRI_TRANSITIONS=422} [2024-06-21 17:18:46,046 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-21 17:18:46,046 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 422 transitions, 7426 flow [2024-06-21 17:18:46,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:46,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:18:46,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:18:46,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 17:18:46,047 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:18:46,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:18:46,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1467886862, now seen corresponding path program 1 times [2024-06-21 17:18:46,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:18:46,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936201671] [2024-06-21 17:18:46,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:18:46,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:18:46,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:18:49,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:18:49,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:18:49,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936201671] [2024-06-21 17:18:49,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936201671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:18:49,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:18:49,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:18:49,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019119644] [2024-06-21 17:18:49,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:18:49,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:18:49,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:18:49,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:18:49,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:18:49,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:18:49,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 422 transitions, 7426 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:49,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:18:49,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:18:49,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:18:52,415 INFO L124 PetriNetUnfolderBase]: 7408/11794 cut-off events. [2024-06-21 17:18:52,415 INFO L125 PetriNetUnfolderBase]: For 572538/572544 co-relation queries the response was YES. [2024-06-21 17:18:52,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84392 conditions, 11794 events. 7408/11794 cut-off events. For 572538/572544 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 79076 event pairs, 2973 based on Foata normal form. 8/11801 useless extension candidates. Maximal degree in co-relation 84283. Up to 11371 conditions per place. [2024-06-21 17:18:52,544 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 419 selfloop transitions, 25 changer transitions 0/448 dead transitions. [2024-06-21 17:18:52,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 448 transitions, 8440 flow [2024-06-21 17:18:52,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:18:52,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:18:52,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-21 17:18:52,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2024-06-21 17:18:52,553 INFO L175 Difference]: Start difference. First operand has 233 places, 422 transitions, 7426 flow. Second operand 8 states and 123 transitions. [2024-06-21 17:18:52,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 448 transitions, 8440 flow [2024-06-21 17:18:54,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 448 transitions, 8184 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 17:18:54,205 INFO L231 Difference]: Finished difference. Result has 235 places, 424 transitions, 7282 flow [2024-06-21 17:18:54,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7170, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7282, PETRI_PLACES=235, PETRI_TRANSITIONS=424} [2024-06-21 17:18:54,206 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 192 predicate places. [2024-06-21 17:18:54,207 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 424 transitions, 7282 flow [2024-06-21 17:18:54,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:54,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:18:54,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:18:54,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 17:18:54,207 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:18:54,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:18:54,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1074281560, now seen corresponding path program 2 times [2024-06-21 17:18:54,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:18:54,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802235525] [2024-06-21 17:18:54,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:18:54,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:18:54,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:18:57,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:18:57,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:18:57,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802235525] [2024-06-21 17:18:57,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802235525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:18:57,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:18:57,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:18:57,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155106145] [2024-06-21 17:18:57,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:18:57,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:18:57,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:18:57,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:18:57,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:18:57,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:18:57,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 424 transitions, 7282 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:18:57,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:18:57,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:18:57,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:19:00,424 INFO L124 PetriNetUnfolderBase]: 7402/11732 cut-off events. [2024-06-21 17:19:00,425 INFO L125 PetriNetUnfolderBase]: For 588619/588621 co-relation queries the response was YES. [2024-06-21 17:19:00,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83986 conditions, 11732 events. 7402/11732 cut-off events. For 588619/588621 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 78021 event pairs, 2829 based on Foata normal form. 2/11732 useless extension candidates. Maximal degree in co-relation 83876. Up to 10884 conditions per place. [2024-06-21 17:19:00,552 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 339 selfloop transitions, 120 changer transitions 0/463 dead transitions. [2024-06-21 17:19:00,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 463 transitions, 8544 flow [2024-06-21 17:19:00,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:19:00,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:19:00,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-21 17:19:00,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-21 17:19:00,554 INFO L175 Difference]: Start difference. First operand has 235 places, 424 transitions, 7282 flow. Second operand 9 states and 152 transitions. [2024-06-21 17:19:00,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 463 transitions, 8544 flow [2024-06-21 17:19:01,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 463 transitions, 8454 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-21 17:19:01,763 INFO L231 Difference]: Finished difference. Result has 239 places, 430 transitions, 7616 flow [2024-06-21 17:19:01,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7192, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7616, PETRI_PLACES=239, PETRI_TRANSITIONS=430} [2024-06-21 17:19:01,763 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-21 17:19:01,764 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 430 transitions, 7616 flow [2024-06-21 17:19:01,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:01,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:19:01,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:19:01,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 17:19:01,764 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:19:01,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:19:01,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1074401716, now seen corresponding path program 4 times [2024-06-21 17:19:01,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:19:01,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217382996] [2024-06-21 17:19:01,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:19:01,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:19:01,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:19:04,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:19:04,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:19:04,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217382996] [2024-06-21 17:19:04,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217382996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:19:04,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:19:04,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:19:04,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848655638] [2024-06-21 17:19:04,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:19:04,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:19:04,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:19:04,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:19:04,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:19:04,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:19:04,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 430 transitions, 7616 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:04,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:19:04,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:19:04,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:19:07,823 INFO L124 PetriNetUnfolderBase]: 7294/11593 cut-off events. [2024-06-21 17:19:07,823 INFO L125 PetriNetUnfolderBase]: For 606926/606928 co-relation queries the response was YES. [2024-06-21 17:19:07,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83140 conditions, 11593 events. 7294/11593 cut-off events. For 606926/606928 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 77224 event pairs, 2865 based on Foata normal form. 12/11603 useless extension candidates. Maximal degree in co-relation 83028. Up to 10895 conditions per place. [2024-06-21 17:19:07,939 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 345 selfloop transitions, 99 changer transitions 9/457 dead transitions. [2024-06-21 17:19:07,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 457 transitions, 8602 flow [2024-06-21 17:19:07,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:19:07,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:19:07,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-21 17:19:07,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-21 17:19:07,941 INFO L175 Difference]: Start difference. First operand has 239 places, 430 transitions, 7616 flow. Second operand 9 states and 145 transitions. [2024-06-21 17:19:07,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 457 transitions, 8602 flow [2024-06-21 17:19:09,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 457 transitions, 8355 flow, removed 54 selfloop flow, removed 5 redundant places. [2024-06-21 17:19:09,549 INFO L231 Difference]: Finished difference. Result has 243 places, 422 transitions, 7388 flow [2024-06-21 17:19:09,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7369, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7388, PETRI_PLACES=243, PETRI_TRANSITIONS=422} [2024-06-21 17:19:09,549 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 200 predicate places. [2024-06-21 17:19:09,549 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 422 transitions, 7388 flow [2024-06-21 17:19:09,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:09,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:19:09,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:19:09,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 17:19:09,554 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:19:09,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:19:09,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1302182710, now seen corresponding path program 3 times [2024-06-21 17:19:09,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:19:09,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417269930] [2024-06-21 17:19:09,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:19:09,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:19:09,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:19:12,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:19:12,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:19:12,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417269930] [2024-06-21 17:19:12,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417269930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:19:12,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:19:12,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:19:12,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439419774] [2024-06-21 17:19:12,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:19:12,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:19:12,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:19:12,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:19:12,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:19:12,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:19:12,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 422 transitions, 7388 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:12,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:19:12,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:19:12,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:19:15,350 INFO L124 PetriNetUnfolderBase]: 7232/11420 cut-off events. [2024-06-21 17:19:15,350 INFO L125 PetriNetUnfolderBase]: For 631783/631785 co-relation queries the response was YES. [2024-06-21 17:19:15,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82941 conditions, 11420 events. 7232/11420 cut-off events. For 631783/631785 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 75241 event pairs, 2132 based on Foata normal form. 2/11420 useless extension candidates. Maximal degree in co-relation 82827. Up to 8651 conditions per place. [2024-06-21 17:19:15,485 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 191 selfloop transitions, 289 changer transitions 0/484 dead transitions. [2024-06-21 17:19:15,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 484 transitions, 9348 flow [2024-06-21 17:19:15,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:19:15,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:19:15,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 17:19:15,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-21 17:19:15,486 INFO L175 Difference]: Start difference. First operand has 243 places, 422 transitions, 7388 flow. Second operand 8 states and 154 transitions. [2024-06-21 17:19:15,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 484 transitions, 9348 flow [2024-06-21 17:19:17,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 484 transitions, 8740 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-21 17:19:17,152 INFO L231 Difference]: Finished difference. Result has 241 places, 443 transitions, 7978 flow [2024-06-21 17:19:17,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6780, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=271, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7978, PETRI_PLACES=241, PETRI_TRANSITIONS=443} [2024-06-21 17:19:17,167 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 198 predicate places. [2024-06-21 17:19:17,167 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 443 transitions, 7978 flow [2024-06-21 17:19:17,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:17,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:19:17,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:19:17,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 17:19:17,168 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:19:17,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:19:17,168 INFO L85 PathProgramCache]: Analyzing trace with hash -539210862, now seen corresponding path program 4 times [2024-06-21 17:19:17,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:19:17,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827443455] [2024-06-21 17:19:17,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:19:17,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:19:17,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:19:19,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:19:19,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:19:19,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827443455] [2024-06-21 17:19:19,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827443455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:19:19,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:19:19,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:19:19,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077214983] [2024-06-21 17:19:19,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:19:19,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:19:19,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:19:19,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:19:19,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:19:20,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:19:20,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 443 transitions, 7978 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:20,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:19:20,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:19:20,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:19:23,361 INFO L124 PetriNetUnfolderBase]: 7226/11422 cut-off events. [2024-06-21 17:19:23,362 INFO L125 PetriNetUnfolderBase]: For 659227/659229 co-relation queries the response was YES. [2024-06-21 17:19:23,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86719 conditions, 11422 events. 7226/11422 cut-off events. For 659227/659229 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 75388 event pairs, 2133 based on Foata normal form. 2/11422 useless extension candidates. Maximal degree in co-relation 86603. Up to 8650 conditions per place. [2024-06-21 17:19:23,487 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 182 selfloop transitions, 293 changer transitions 0/479 dead transitions. [2024-06-21 17:19:23,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 479 transitions, 9422 flow [2024-06-21 17:19:23,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:19:23,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:19:23,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 17:19:23,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-21 17:19:23,489 INFO L175 Difference]: Start difference. First operand has 241 places, 443 transitions, 7978 flow. Second operand 8 states and 148 transitions. [2024-06-21 17:19:23,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 479 transitions, 9422 flow [2024-06-21 17:19:25,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 479 transitions, 9246 flow, removed 78 selfloop flow, removed 2 redundant places. [2024-06-21 17:19:25,061 INFO L231 Difference]: Finished difference. Result has 247 places, 444 transitions, 8436 flow [2024-06-21 17:19:25,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7814, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=292, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8436, PETRI_PLACES=247, PETRI_TRANSITIONS=444} [2024-06-21 17:19:25,061 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 204 predicate places. [2024-06-21 17:19:25,061 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 444 transitions, 8436 flow [2024-06-21 17:19:25,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:25,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:19:25,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:19:25,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 17:19:25,062 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:19:25,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:19:25,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1429080466, now seen corresponding path program 5 times [2024-06-21 17:19:25,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:19:25,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151160565] [2024-06-21 17:19:25,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:19:25,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:19:25,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:19:27,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:19:27,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:19:27,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151160565] [2024-06-21 17:19:27,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151160565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:19:27,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:19:27,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:19:27,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500458564] [2024-06-21 17:19:27,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:19:27,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:19:27,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:19:27,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:19:27,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:19:27,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:19:27,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 444 transitions, 8436 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:27,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:19:27,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:19:27,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:19:31,101 INFO L124 PetriNetUnfolderBase]: 7459/11763 cut-off events. [2024-06-21 17:19:31,101 INFO L125 PetriNetUnfolderBase]: For 722589/722591 co-relation queries the response was YES. [2024-06-21 17:19:31,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92220 conditions, 11763 events. 7459/11763 cut-off events. For 722589/722591 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 77619 event pairs, 2750 based on Foata normal form. 6/11767 useless extension candidates. Maximal degree in co-relation 92102. Up to 10767 conditions per place. [2024-06-21 17:19:31,241 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 341 selfloop transitions, 151 changer transitions 0/496 dead transitions. [2024-06-21 17:19:31,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 496 transitions, 10231 flow [2024-06-21 17:19:31,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:19:31,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:19:31,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 17:19:31,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-21 17:19:31,259 INFO L175 Difference]: Start difference. First operand has 247 places, 444 transitions, 8436 flow. Second operand 9 states and 151 transitions. [2024-06-21 17:19:31,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 496 transitions, 10231 flow [2024-06-21 17:19:33,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 496 transitions, 9640 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-21 17:19:33,171 INFO L231 Difference]: Finished difference. Result has 253 places, 469 transitions, 8805 flow [2024-06-21 17:19:33,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7879, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8805, PETRI_PLACES=253, PETRI_TRANSITIONS=469} [2024-06-21 17:19:33,172 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 210 predicate places. [2024-06-21 17:19:33,172 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 469 transitions, 8805 flow [2024-06-21 17:19:33,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:33,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:19:33,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:19:33,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 17:19:33,173 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:19:33,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:19:33,173 INFO L85 PathProgramCache]: Analyzing trace with hash -423919692, now seen corresponding path program 5 times [2024-06-21 17:19:33,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:19:33,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784728958] [2024-06-21 17:19:33,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:19:33,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:19:33,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:19:36,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:19:36,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:19:36,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784728958] [2024-06-21 17:19:36,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784728958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:19:36,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:19:36,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:19:36,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487058685] [2024-06-21 17:19:36,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:19:36,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:19:36,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:19:36,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:19:36,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:19:36,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:19:36,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 469 transitions, 8805 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:36,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:19:36,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:19:36,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:19:39,583 INFO L124 PetriNetUnfolderBase]: 7441/11734 cut-off events. [2024-06-21 17:19:39,584 INFO L125 PetriNetUnfolderBase]: For 731583/731585 co-relation queries the response was YES. [2024-06-21 17:19:39,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91401 conditions, 11734 events. 7441/11734 cut-off events. For 731583/731585 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 77326 event pairs, 2758 based on Foata normal form. 6/11738 useless extension candidates. Maximal degree in co-relation 91280. Up to 10756 conditions per place. [2024-06-21 17:19:39,739 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 341 selfloop transitions, 151 changer transitions 0/496 dead transitions. [2024-06-21 17:19:39,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 496 transitions, 10075 flow [2024-06-21 17:19:39,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:19:39,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:19:39,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 17:19:39,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-21 17:19:39,740 INFO L175 Difference]: Start difference. First operand has 253 places, 469 transitions, 8805 flow. Second operand 9 states and 151 transitions. [2024-06-21 17:19:39,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 496 transitions, 10075 flow [2024-06-21 17:19:41,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 496 transitions, 9884 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-21 17:19:41,770 INFO L231 Difference]: Finished difference. Result has 259 places, 469 transitions, 8923 flow [2024-06-21 17:19:41,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8614, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8923, PETRI_PLACES=259, PETRI_TRANSITIONS=469} [2024-06-21 17:19:41,771 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 216 predicate places. [2024-06-21 17:19:41,771 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 469 transitions, 8923 flow [2024-06-21 17:19:41,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:41,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:19:41,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:19:41,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 17:19:41,772 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:19:41,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:19:41,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1428664756, now seen corresponding path program 6 times [2024-06-21 17:19:41,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:19:41,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588803385] [2024-06-21 17:19:41,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:19:41,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:19:41,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:19:44,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:19:44,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:19:44,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588803385] [2024-06-21 17:19:44,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588803385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:19:44,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:19:44,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:19:44,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732614637] [2024-06-21 17:19:44,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:19:44,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:19:44,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:19:44,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:19:44,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:19:44,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:19:44,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 469 transitions, 8923 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:44,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:19:44,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:19:44,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:19:47,743 INFO L124 PetriNetUnfolderBase]: 7415/11717 cut-off events. [2024-06-21 17:19:47,743 INFO L125 PetriNetUnfolderBase]: For 747750/747752 co-relation queries the response was YES. [2024-06-21 17:19:47,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91248 conditions, 11717 events. 7415/11717 cut-off events. For 747750/747752 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 77555 event pairs, 2874 based on Foata normal form. 6/11721 useless extension candidates. Maximal degree in co-relation 91126. Up to 11109 conditions per place. [2024-06-21 17:19:47,882 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 386 selfloop transitions, 99 changer transitions 3/492 dead transitions. [2024-06-21 17:19:47,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 492 transitions, 9965 flow [2024-06-21 17:19:47,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:19:47,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:19:47,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-21 17:19:47,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-21 17:19:47,883 INFO L175 Difference]: Start difference. First operand has 259 places, 469 transitions, 8923 flow. Second operand 9 states and 142 transitions. [2024-06-21 17:19:47,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 492 transitions, 9965 flow [2024-06-21 17:19:49,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 492 transitions, 9607 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-21 17:19:49,692 INFO L231 Difference]: Finished difference. Result has 261 places, 467 transitions, 8723 flow [2024-06-21 17:19:49,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8565, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8723, PETRI_PLACES=261, PETRI_TRANSITIONS=467} [2024-06-21 17:19:49,693 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 218 predicate places. [2024-06-21 17:19:49,693 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 467 transitions, 8723 flow [2024-06-21 17:19:49,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:49,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:19:49,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:19:49,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 17:19:49,694 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:19:49,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:19:49,694 INFO L85 PathProgramCache]: Analyzing trace with hash -502990450, now seen corresponding path program 7 times [2024-06-21 17:19:49,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:19:49,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296740464] [2024-06-21 17:19:49,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:19:49,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:19:49,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:19:52,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:19:52,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:19:52,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296740464] [2024-06-21 17:19:52,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296740464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:19:52,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:19:52,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:19:52,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195191674] [2024-06-21 17:19:52,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:19:52,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:19:52,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:19:52,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:19:52,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:19:52,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:19:52,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 467 transitions, 8723 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:52,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:19:52,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:19:52,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:19:56,166 INFO L124 PetriNetUnfolderBase]: 7395/11738 cut-off events. [2024-06-21 17:19:56,167 INFO L125 PetriNetUnfolderBase]: For 765384/765400 co-relation queries the response was YES. [2024-06-21 17:19:56,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90846 conditions, 11738 events. 7395/11738 cut-off events. For 765384/765400 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 77909 event pairs, 2048 based on Foata normal form. 13/11749 useless extension candidates. Maximal degree in co-relation 90723. Up to 9035 conditions per place. [2024-06-21 17:19:56,314 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 231 selfloop transitions, 263 changer transitions 0/498 dead transitions. [2024-06-21 17:19:56,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 498 transitions, 10209 flow [2024-06-21 17:19:56,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:19:56,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:19:56,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 17:19:56,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-21 17:19:56,316 INFO L175 Difference]: Start difference. First operand has 261 places, 467 transitions, 8723 flow. Second operand 8 states and 142 transitions. [2024-06-21 17:19:56,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 498 transitions, 10209 flow [2024-06-21 17:19:57,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 498 transitions, 9980 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 17:19:57,979 INFO L231 Difference]: Finished difference. Result has 263 places, 470 transitions, 9087 flow [2024-06-21 17:19:57,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8494, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=260, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9087, PETRI_PLACES=263, PETRI_TRANSITIONS=470} [2024-06-21 17:19:57,980 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 220 predicate places. [2024-06-21 17:19:57,980 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 470 transitions, 9087 flow [2024-06-21 17:19:57,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:19:57,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:19:57,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:19:57,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 17:19:57,980 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:19:57,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:19:57,981 INFO L85 PathProgramCache]: Analyzing trace with hash -725593390, now seen corresponding path program 8 times [2024-06-21 17:19:57,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:19:57,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363437973] [2024-06-21 17:19:57,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:19:57,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:19:57,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:01,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:01,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:01,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363437973] [2024-06-21 17:20:01,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363437973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:01,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:01,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:20:01,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633000088] [2024-06-21 17:20:01,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:01,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:20:01,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:01,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:20:01,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:20:01,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:20:01,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 470 transitions, 9087 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:01,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:01,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:20:01,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:04,612 INFO L124 PetriNetUnfolderBase]: 7353/11627 cut-off events. [2024-06-21 17:20:04,612 INFO L125 PetriNetUnfolderBase]: For 790580/790582 co-relation queries the response was YES. [2024-06-21 17:20:04,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91741 conditions, 11627 events. 7353/11627 cut-off events. For 790580/790582 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 76906 event pairs, 2837 based on Foata normal form. 6/11631 useless extension candidates. Maximal degree in co-relation 91617. Up to 10899 conditions per place. [2024-06-21 17:20:04,752 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 375 selfloop transitions, 118 changer transitions 3/500 dead transitions. [2024-06-21 17:20:04,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 500 transitions, 10171 flow [2024-06-21 17:20:04,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:20:04,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:20:04,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 17:20:04,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-21 17:20:04,753 INFO L175 Difference]: Start difference. First operand has 263 places, 470 transitions, 9087 flow. Second operand 8 states and 139 transitions. [2024-06-21 17:20:04,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 500 transitions, 10171 flow [2024-06-21 17:20:06,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 500 transitions, 9764 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-21 17:20:06,552 INFO L231 Difference]: Finished difference. Result has 267 places, 468 transitions, 8891 flow [2024-06-21 17:20:06,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8680, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8891, PETRI_PLACES=267, PETRI_TRANSITIONS=468} [2024-06-21 17:20:06,553 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 224 predicate places. [2024-06-21 17:20:06,553 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 468 transitions, 8891 flow [2024-06-21 17:20:06,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:06,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:06,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:06,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 17:20:06,554 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:20:06,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:06,554 INFO L85 PathProgramCache]: Analyzing trace with hash -497276530, now seen corresponding path program 9 times [2024-06-21 17:20:06,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:06,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303903651] [2024-06-21 17:20:06,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:06,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:06,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:09,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:09,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:09,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303903651] [2024-06-21 17:20:09,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303903651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:09,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:09,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:20:09,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659819824] [2024-06-21 17:20:09,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:09,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:20:09,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:09,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:20:09,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:20:09,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:20:09,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 468 transitions, 8891 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:09,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:09,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:20:09,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:12,658 INFO L124 PetriNetUnfolderBase]: 7327/11626 cut-off events. [2024-06-21 17:20:12,658 INFO L125 PetriNetUnfolderBase]: For 810945/810961 co-relation queries the response was YES. [2024-06-21 17:20:12,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91454 conditions, 11626 events. 7327/11626 cut-off events. For 810945/810961 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 77012 event pairs, 2075 based on Foata normal form. 11/11635 useless extension candidates. Maximal degree in co-relation 91329. Up to 8936 conditions per place. [2024-06-21 17:20:12,777 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 219 selfloop transitions, 279 changer transitions 0/502 dead transitions. [2024-06-21 17:20:12,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 502 transitions, 10484 flow [2024-06-21 17:20:12,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:20:12,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:20:12,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 17:20:12,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-21 17:20:12,779 INFO L175 Difference]: Start difference. First operand has 267 places, 468 transitions, 8891 flow. Second operand 8 states and 139 transitions. [2024-06-21 17:20:12,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 502 transitions, 10484 flow [2024-06-21 17:20:14,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 502 transitions, 10238 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-21 17:20:14,427 INFO L231 Difference]: Finished difference. Result has 268 places, 475 transitions, 9402 flow [2024-06-21 17:20:14,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8657, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=272, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9402, PETRI_PLACES=268, PETRI_TRANSITIONS=475} [2024-06-21 17:20:14,427 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-21 17:20:14,428 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 475 transitions, 9402 flow [2024-06-21 17:20:14,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:14,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:14,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:14,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 17:20:14,428 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:20:14,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:14,429 INFO L85 PathProgramCache]: Analyzing trace with hash -725177680, now seen corresponding path program 10 times [2024-06-21 17:20:14,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:14,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464271250] [2024-06-21 17:20:14,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:14,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:14,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:17,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:17,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:17,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464271250] [2024-06-21 17:20:17,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464271250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:17,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:17,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:20:17,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104109202] [2024-06-21 17:20:17,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:17,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:20:17,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:17,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:20:17,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:20:17,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:20:17,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 475 transitions, 9402 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:17,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:17,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:20:17,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:20,560 INFO L124 PetriNetUnfolderBase]: 7297/11536 cut-off events. [2024-06-21 17:20:20,560 INFO L125 PetriNetUnfolderBase]: For 794007/794009 co-relation queries the response was YES. [2024-06-21 17:20:20,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91639 conditions, 11536 events. 7297/11536 cut-off events. For 794007/794009 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 76013 event pairs, 1979 based on Foata normal form. 6/11540 useless extension candidates. Maximal degree in co-relation 91514. Up to 8920 conditions per place. [2024-06-21 17:20:20,725 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 190 selfloop transitions, 321 changer transitions 0/515 dead transitions. [2024-06-21 17:20:20,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 515 transitions, 10915 flow [2024-06-21 17:20:20,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:20:20,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:20:20,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 17:20:20,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 17:20:20,727 INFO L175 Difference]: Start difference. First operand has 268 places, 475 transitions, 9402 flow. Second operand 9 states and 168 transitions. [2024-06-21 17:20:20,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 515 transitions, 10915 flow [2024-06-21 17:20:23,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 515 transitions, 10472 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-21 17:20:23,124 INFO L231 Difference]: Finished difference. Result has 274 places, 476 transitions, 9729 flow [2024-06-21 17:20:23,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8959, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=320, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9729, PETRI_PLACES=274, PETRI_TRANSITIONS=476} [2024-06-21 17:20:23,125 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 231 predicate places. [2024-06-21 17:20:23,125 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 476 transitions, 9729 flow [2024-06-21 17:20:23,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:23,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:23,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:23,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 17:20:23,126 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:20:23,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:23,126 INFO L85 PathProgramCache]: Analyzing trace with hash -725356426, now seen corresponding path program 6 times [2024-06-21 17:20:23,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:23,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5715734] [2024-06-21 17:20:23,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:23,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:23,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:26,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:26,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:26,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5715734] [2024-06-21 17:20:26,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5715734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:26,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:26,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:20:26,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920080621] [2024-06-21 17:20:26,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:26,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:20:26,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:26,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:20:26,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:20:26,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:20:26,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 476 transitions, 9729 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:26,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:26,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:20:26,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:29,490 INFO L124 PetriNetUnfolderBase]: 7279/11519 cut-off events. [2024-06-21 17:20:29,490 INFO L125 PetriNetUnfolderBase]: For 814016/814018 co-relation queries the response was YES. [2024-06-21 17:20:29,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92522 conditions, 11519 events. 7279/11519 cut-off events. For 814016/814018 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 75969 event pairs, 1971 based on Foata normal form. 6/11523 useless extension candidates. Maximal degree in co-relation 92395. Up to 8915 conditions per place. [2024-06-21 17:20:29,634 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 189 selfloop transitions, 326 changer transitions 0/519 dead transitions. [2024-06-21 17:20:29,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 519 transitions, 11229 flow [2024-06-21 17:20:29,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:20:29,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:20:29,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 17:20:29,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-21 17:20:29,636 INFO L175 Difference]: Start difference. First operand has 274 places, 476 transitions, 9729 flow. Second operand 9 states and 172 transitions. [2024-06-21 17:20:29,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 519 transitions, 11229 flow [2024-06-21 17:20:32,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 519 transitions, 10653 flow, removed 39 selfloop flow, removed 8 redundant places. [2024-06-21 17:20:32,259 INFO L231 Difference]: Finished difference. Result has 275 places, 476 transitions, 9827 flow [2024-06-21 17:20:32,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9159, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=326, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9827, PETRI_PLACES=275, PETRI_TRANSITIONS=476} [2024-06-21 17:20:32,264 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-21 17:20:32,264 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 476 transitions, 9827 flow [2024-06-21 17:20:32,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:32,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:32,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:32,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 17:20:32,264 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:20:32,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:32,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1346486358, now seen corresponding path program 11 times [2024-06-21 17:20:32,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:32,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424529147] [2024-06-21 17:20:32,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:32,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:32,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:35,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:35,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:35,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424529147] [2024-06-21 17:20:35,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424529147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:35,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:35,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:20:35,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136242910] [2024-06-21 17:20:35,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:35,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:20:35,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:35,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:20:35,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:20:35,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:20:35,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 476 transitions, 9827 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:35,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:35,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:20:35,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:38,723 INFO L124 PetriNetUnfolderBase]: 7267/11548 cut-off events. [2024-06-21 17:20:38,723 INFO L125 PetriNetUnfolderBase]: For 811277/811285 co-relation queries the response was YES. [2024-06-21 17:20:38,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92413 conditions, 11548 events. 7267/11548 cut-off events. For 811277/811285 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 76903 event pairs, 2604 based on Foata normal form. 10/11557 useless extension candidates. Maximal degree in co-relation 92286. Up to 9552 conditions per place. [2024-06-21 17:20:38,879 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 284 selfloop transitions, 217 changer transitions 1/506 dead transitions. [2024-06-21 17:20:38,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 506 transitions, 11029 flow [2024-06-21 17:20:38,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:20:38,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:20:38,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 17:20:38,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-21 17:20:38,881 INFO L175 Difference]: Start difference. First operand has 275 places, 476 transitions, 9827 flow. Second operand 8 states and 142 transitions. [2024-06-21 17:20:38,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 506 transitions, 11029 flow [2024-06-21 17:20:41,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 506 transitions, 10252 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-21 17:20:41,127 INFO L231 Difference]: Finished difference. Result has 273 places, 475 transitions, 9489 flow [2024-06-21 17:20:41,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9052, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9489, PETRI_PLACES=273, PETRI_TRANSITIONS=475} [2024-06-21 17:20:41,128 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 230 predicate places. [2024-06-21 17:20:41,128 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 475 transitions, 9489 flow [2024-06-21 17:20:41,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:41,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:41,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:41,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 17:20:41,129 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:20:41,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:41,129 INFO L85 PathProgramCache]: Analyzing trace with hash -812921330, now seen corresponding path program 12 times [2024-06-21 17:20:41,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:41,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489310928] [2024-06-21 17:20:41,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:41,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:41,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:44,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:44,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:44,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489310928] [2024-06-21 17:20:44,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489310928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:44,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:44,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:20:44,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234737861] [2024-06-21 17:20:44,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:44,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:20:44,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:44,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:20:44,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:20:44,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:20:44,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 475 transitions, 9489 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:44,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:44,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:20:44,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:47,413 INFO L124 PetriNetUnfolderBase]: 6983/10979 cut-off events. [2024-06-21 17:20:47,414 INFO L125 PetriNetUnfolderBase]: For 796395/796399 co-relation queries the response was YES. [2024-06-21 17:20:47,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88005 conditions, 10979 events. 6983/10979 cut-off events. For 796395/796399 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 71456 event pairs, 2415 based on Foata normal form. 14/10992 useless extension candidates. Maximal degree in co-relation 87878. Up to 9121 conditions per place. [2024-06-21 17:20:47,540 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 272 selfloop transitions, 235 changer transitions 5/516 dead transitions. [2024-06-21 17:20:47,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 516 transitions, 10639 flow [2024-06-21 17:20:47,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:20:47,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:20:47,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 17:20:47,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-21 17:20:47,541 INFO L175 Difference]: Start difference. First operand has 273 places, 475 transitions, 9489 flow. Second operand 9 states and 166 transitions. [2024-06-21 17:20:47,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 516 transitions, 10639 flow [2024-06-21 17:20:49,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 516 transitions, 10271 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 17:20:49,450 INFO L231 Difference]: Finished difference. Result has 275 places, 470 transitions, 9510 flow [2024-06-21 17:20:49,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9121, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=235, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9510, PETRI_PLACES=275, PETRI_TRANSITIONS=470} [2024-06-21 17:20:49,450 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-21 17:20:49,451 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 470 transitions, 9510 flow [2024-06-21 17:20:49,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:49,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:49,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:49,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 17:20:49,451 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:20:49,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:49,451 INFO L85 PathProgramCache]: Analyzing trace with hash -502981522, now seen corresponding path program 2 times [2024-06-21 17:20:49,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:49,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291846922] [2024-06-21 17:20:49,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:49,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:49,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:53,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:53,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:53,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291846922] [2024-06-21 17:20:53,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291846922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:53,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:53,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:20:53,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374376985] [2024-06-21 17:20:53,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:53,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:20:53,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:53,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:20:53,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:20:53,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:20:53,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 470 transitions, 9510 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:53,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:53,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:20:53,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:56,211 INFO L124 PetriNetUnfolderBase]: 6327/9955 cut-off events. [2024-06-21 17:20:56,212 INFO L125 PetriNetUnfolderBase]: For 769085/769097 co-relation queries the response was YES. [2024-06-21 17:20:56,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84083 conditions, 9955 events. 6327/9955 cut-off events. For 769085/769097 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 63367 event pairs, 2250 based on Foata normal form. 14/9968 useless extension candidates. Maximal degree in co-relation 83956. Up to 9606 conditions per place. [2024-06-21 17:20:56,322 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 454 selfloop transitions, 31 changer transitions 0/489 dead transitions. [2024-06-21 17:20:56,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 489 transitions, 10590 flow [2024-06-21 17:20:56,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:20:56,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:20:56,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 106 transitions. [2024-06-21 17:20:56,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36054421768707484 [2024-06-21 17:20:56,324 INFO L175 Difference]: Start difference. First operand has 275 places, 470 transitions, 9510 flow. Second operand 7 states and 106 transitions. [2024-06-21 17:20:56,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 489 transitions, 10590 flow [2024-06-21 17:20:58,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 489 transitions, 9880 flow, removed 5 selfloop flow, removed 13 redundant places. [2024-06-21 17:20:58,191 INFO L231 Difference]: Finished difference. Result has 269 places, 472 transitions, 8929 flow [2024-06-21 17:20:58,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8800, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8929, PETRI_PLACES=269, PETRI_TRANSITIONS=472} [2024-06-21 17:20:58,191 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 226 predicate places. [2024-06-21 17:20:58,191 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 472 transitions, 8929 flow [2024-06-21 17:20:58,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:58,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:58,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:58,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 17:20:58,192 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:20:58,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:58,192 INFO L85 PathProgramCache]: Analyzing trace with hash -800639192, now seen corresponding path program 3 times [2024-06-21 17:20:58,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:58,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438332180] [2024-06-21 17:20:58,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:58,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:58,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:02,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:02,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:02,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438332180] [2024-06-21 17:21:02,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438332180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:02,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:02,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:21:02,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190475810] [2024-06-21 17:21:02,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:02,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:21:02,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:02,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:21:02,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:21:02,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:21:02,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 472 transitions, 8929 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:02,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:02,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:21:02,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:05,323 INFO L124 PetriNetUnfolderBase]: 6322/9924 cut-off events. [2024-06-21 17:21:05,323 INFO L125 PetriNetUnfolderBase]: For 730920/730932 co-relation queries the response was YES. [2024-06-21 17:21:05,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81440 conditions, 9924 events. 6322/9924 cut-off events. For 730920/730932 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 63077 event pairs, 2237 based on Foata normal form. 14/9937 useless extension candidates. Maximal degree in co-relation 81316. Up to 9568 conditions per place. [2024-06-21 17:21:05,436 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 452 selfloop transitions, 38 changer transitions 0/494 dead transitions. [2024-06-21 17:21:05,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 494 transitions, 10193 flow [2024-06-21 17:21:05,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:21:05,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:21:05,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-06-21 17:21:05,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36394557823129253 [2024-06-21 17:21:05,437 INFO L175 Difference]: Start difference. First operand has 269 places, 472 transitions, 8929 flow. Second operand 7 states and 107 transitions. [2024-06-21 17:21:05,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 494 transitions, 10193 flow [2024-06-21 17:21:07,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 494 transitions, 10080 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-21 17:21:07,145 INFO L231 Difference]: Finished difference. Result has 272 places, 476 transitions, 9034 flow [2024-06-21 17:21:07,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8816, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9034, PETRI_PLACES=272, PETRI_TRANSITIONS=476} [2024-06-21 17:21:07,145 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 229 predicate places. [2024-06-21 17:21:07,145 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 476 transitions, 9034 flow [2024-06-21 17:21:07,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:07,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:07,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:07,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 17:21:07,146 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:21:07,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:07,146 INFO L85 PathProgramCache]: Analyzing trace with hash -902478832, now seen corresponding path program 4 times [2024-06-21 17:21:07,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:07,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60888726] [2024-06-21 17:21:07,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:07,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:07,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:10,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:10,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:10,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60888726] [2024-06-21 17:21:10,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60888726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:10,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:10,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:21:10,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294602689] [2024-06-21 17:21:10,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:10,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:21:10,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:10,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:21:10,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:21:10,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:21:10,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 476 transitions, 9034 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:10,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:10,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:21:10,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:13,599 INFO L124 PetriNetUnfolderBase]: 6317/9905 cut-off events. [2024-06-21 17:21:13,600 INFO L125 PetriNetUnfolderBase]: For 752407/752413 co-relation queries the response was YES. [2024-06-21 17:21:13,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81754 conditions, 9905 events. 6317/9905 cut-off events. For 752407/752413 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 62850 event pairs, 2306 based on Foata normal form. 8/9912 useless extension candidates. Maximal degree in co-relation 81628. Up to 9598 conditions per place. [2024-06-21 17:21:13,734 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 466 selfloop transitions, 29 changer transitions 0/499 dead transitions. [2024-06-21 17:21:13,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 499 transitions, 10096 flow [2024-06-21 17:21:13,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:21:13,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:21:13,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-21 17:21:13,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 17:21:13,735 INFO L175 Difference]: Start difference. First operand has 272 places, 476 transitions, 9034 flow. Second operand 7 states and 112 transitions. [2024-06-21 17:21:13,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 499 transitions, 10096 flow [2024-06-21 17:21:15,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 499 transitions, 9963 flow, removed 50 selfloop flow, removed 3 redundant places. [2024-06-21 17:21:15,476 INFO L231 Difference]: Finished difference. Result has 276 places, 476 transitions, 8968 flow [2024-06-21 17:21:15,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8901, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8968, PETRI_PLACES=276, PETRI_TRANSITIONS=476} [2024-06-21 17:21:15,477 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 233 predicate places. [2024-06-21 17:21:15,477 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 476 transitions, 8968 flow [2024-06-21 17:21:15,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:15,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:15,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:15,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 17:21:15,478 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:21:15,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:15,479 INFO L85 PathProgramCache]: Analyzing trace with hash -542058894, now seen corresponding path program 1 times [2024-06-21 17:21:15,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:15,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243340209] [2024-06-21 17:21:15,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:15,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:15,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:18,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:18,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:18,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243340209] [2024-06-21 17:21:18,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243340209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:18,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:18,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:21:18,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161896364] [2024-06-21 17:21:18,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:18,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:21:18,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:18,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:21:18,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:21:18,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:21:18,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 476 transitions, 8968 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:18,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:18,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:21:18,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:21,588 INFO L124 PetriNetUnfolderBase]: 6397/10027 cut-off events. [2024-06-21 17:21:21,588 INFO L125 PetriNetUnfolderBase]: For 796700/796702 co-relation queries the response was YES. [2024-06-21 17:21:21,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83424 conditions, 10027 events. 6397/10027 cut-off events. For 796700/796702 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 63601 event pairs, 2219 based on Foata normal form. 2/10028 useless extension candidates. Maximal degree in co-relation 83296. Up to 9485 conditions per place. [2024-06-21 17:21:21,719 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 466 selfloop transitions, 48 changer transitions 0/518 dead transitions. [2024-06-21 17:21:21,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 518 transitions, 10364 flow [2024-06-21 17:21:21,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:21:21,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:21:21,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 17:21:21,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-21 17:21:21,720 INFO L175 Difference]: Start difference. First operand has 276 places, 476 transitions, 8968 flow. Second operand 8 states and 143 transitions. [2024-06-21 17:21:21,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 518 transitions, 10364 flow [2024-06-21 17:21:23,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 518 transitions, 10298 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 17:21:23,668 INFO L231 Difference]: Finished difference. Result has 278 places, 480 transitions, 9131 flow [2024-06-21 17:21:23,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8902, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9131, PETRI_PLACES=278, PETRI_TRANSITIONS=480} [2024-06-21 17:21:23,669 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-21 17:21:23,669 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 480 transitions, 9131 flow [2024-06-21 17:21:23,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:23,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:23,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:23,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 17:21:23,670 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:21:23,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:23,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1310822968, now seen corresponding path program 2 times [2024-06-21 17:21:23,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:23,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053926078] [2024-06-21 17:21:23,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:23,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:23,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:26,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:26,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:26,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053926078] [2024-06-21 17:21:26,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053926078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:26,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:26,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:21:26,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975117825] [2024-06-21 17:21:26,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:26,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:21:26,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:26,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:21:26,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:21:26,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:21:26,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 480 transitions, 9131 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:26,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:26,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:21:26,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:29,959 INFO L124 PetriNetUnfolderBase]: 6405/10039 cut-off events. [2024-06-21 17:21:29,959 INFO L125 PetriNetUnfolderBase]: For 824873/824875 co-relation queries the response was YES. [2024-06-21 17:21:30,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84241 conditions, 10039 events. 6405/10039 cut-off events. For 824873/824875 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 63661 event pairs, 2263 based on Foata normal form. 2/10040 useless extension candidates. Maximal degree in co-relation 84112. Up to 9622 conditions per place. [2024-06-21 17:21:30,081 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 461 selfloop transitions, 45 changer transitions 0/510 dead transitions. [2024-06-21 17:21:30,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 510 transitions, 10287 flow [2024-06-21 17:21:30,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:21:30,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:21:30,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 17:21:30,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-21 17:21:30,083 INFO L175 Difference]: Start difference. First operand has 278 places, 480 transitions, 9131 flow. Second operand 8 states and 133 transitions. [2024-06-21 17:21:30,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 510 transitions, 10287 flow [2024-06-21 17:21:32,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 510 transitions, 10154 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-21 17:21:32,054 INFO L231 Difference]: Finished difference. Result has 282 places, 482 transitions, 9163 flow [2024-06-21 17:21:32,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9008, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9163, PETRI_PLACES=282, PETRI_TRANSITIONS=482} [2024-06-21 17:21:32,055 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 239 predicate places. [2024-06-21 17:21:32,055 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 482 transitions, 9163 flow [2024-06-21 17:21:32,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:32,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:32,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:32,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 17:21:32,056 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:21:32,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:32,056 INFO L85 PathProgramCache]: Analyzing trace with hash -5947678, now seen corresponding path program 3 times [2024-06-21 17:21:32,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:32,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237824736] [2024-06-21 17:21:32,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:32,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:32,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:35,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:35,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:35,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237824736] [2024-06-21 17:21:35,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237824736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:35,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:35,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:21:35,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802505510] [2024-06-21 17:21:35,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:35,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:21:35,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:35,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:21:35,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:21:35,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:21:35,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 482 transitions, 9163 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:35,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:35,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:21:35,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:38,088 INFO L124 PetriNetUnfolderBase]: 6457/10123 cut-off events. [2024-06-21 17:21:38,088 INFO L125 PetriNetUnfolderBase]: For 871811/871813 co-relation queries the response was YES. [2024-06-21 17:21:38,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85237 conditions, 10123 events. 6457/10123 cut-off events. For 871811/871813 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 64409 event pairs, 2409 based on Foata normal form. 14/10136 useless extension candidates. Maximal degree in co-relation 85106. Up to 9758 conditions per place. [2024-06-21 17:21:38,238 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 482 selfloop transitions, 26 changer transitions 0/512 dead transitions. [2024-06-21 17:21:38,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 512 transitions, 10335 flow [2024-06-21 17:21:38,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:21:38,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:21:38,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-21 17:21:38,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-21 17:21:38,240 INFO L175 Difference]: Start difference. First operand has 282 places, 482 transitions, 9163 flow. Second operand 9 states and 140 transitions. [2024-06-21 17:21:38,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 512 transitions, 10335 flow [2024-06-21 17:21:40,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 512 transitions, 10200 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-21 17:21:40,892 INFO L231 Difference]: Finished difference. Result has 285 places, 484 transitions, 9150 flow [2024-06-21 17:21:40,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9028, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9150, PETRI_PLACES=285, PETRI_TRANSITIONS=484} [2024-06-21 17:21:40,893 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-21 17:21:40,893 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 484 transitions, 9150 flow [2024-06-21 17:21:40,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:40,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:40,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:40,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 17:21:40,893 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:21:40,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:40,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1429095346, now seen corresponding path program 1 times [2024-06-21 17:21:40,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:40,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985803972] [2024-06-21 17:21:40,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:40,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:40,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:43,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:43,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:43,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985803972] [2024-06-21 17:21:43,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985803972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:43,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:43,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:21:43,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039162016] [2024-06-21 17:21:43,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:43,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:21:43,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:43,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:21:43,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:21:43,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:21:43,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 484 transitions, 9150 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:43,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:43,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:21:43,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:46,980 INFO L124 PetriNetUnfolderBase]: 6509/10203 cut-off events. [2024-06-21 17:21:46,980 INFO L125 PetriNetUnfolderBase]: For 895437/895439 co-relation queries the response was YES. [2024-06-21 17:21:47,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85990 conditions, 10203 events. 6509/10203 cut-off events. For 895437/895439 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 65028 event pairs, 2421 based on Foata normal form. 14/10216 useless extension candidates. Maximal degree in co-relation 85858. Up to 9838 conditions per place. [2024-06-21 17:21:47,127 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 484 selfloop transitions, 26 changer transitions 0/514 dead transitions. [2024-06-21 17:21:47,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 514 transitions, 10302 flow [2024-06-21 17:21:47,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:21:47,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:21:47,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-21 17:21:47,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-21 17:21:47,128 INFO L175 Difference]: Start difference. First operand has 285 places, 484 transitions, 9150 flow. Second operand 9 states and 140 transitions. [2024-06-21 17:21:47,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 514 transitions, 10302 flow [2024-06-21 17:21:49,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 514 transitions, 10210 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-21 17:21:49,261 INFO L231 Difference]: Finished difference. Result has 287 places, 486 transitions, 9156 flow [2024-06-21 17:21:49,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9058, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9156, PETRI_PLACES=287, PETRI_TRANSITIONS=486} [2024-06-21 17:21:49,262 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 244 predicate places. [2024-06-21 17:21:49,262 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 486 transitions, 9156 flow [2024-06-21 17:21:49,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:49,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:49,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:49,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 17:21:49,262 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:21:49,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:49,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1848302862, now seen corresponding path program 4 times [2024-06-21 17:21:49,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:49,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930188485] [2024-06-21 17:21:49,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:49,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:49,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:52,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:52,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:52,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930188485] [2024-06-21 17:21:52,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930188485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:52,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:52,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:21:52,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236681960] [2024-06-21 17:21:52,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:52,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:21:52,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:52,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:21:52,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:21:52,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:21:52,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 486 transitions, 9156 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:52,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:52,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:21:52,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:55,288 INFO L124 PetriNetUnfolderBase]: 6476/10152 cut-off events. [2024-06-21 17:21:55,288 INFO L125 PetriNetUnfolderBase]: For 895864/895866 co-relation queries the response was YES. [2024-06-21 17:21:55,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85213 conditions, 10152 events. 6476/10152 cut-off events. For 895864/895866 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 64523 event pairs, 2218 based on Foata normal form. 14/10165 useless extension candidates. Maximal degree in co-relation 85080. Up to 9627 conditions per place. [2024-06-21 17:21:55,409 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 473 selfloop transitions, 46 changer transitions 0/523 dead transitions. [2024-06-21 17:21:55,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 523 transitions, 10320 flow [2024-06-21 17:21:55,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:21:55,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:21:55,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 17:21:55,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-21 17:21:55,411 INFO L175 Difference]: Start difference. First operand has 287 places, 486 transitions, 9156 flow. Second operand 9 states and 151 transitions. [2024-06-21 17:21:55,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 523 transitions, 10320 flow [2024-06-21 17:21:58,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 523 transitions, 10210 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-21 17:21:58,022 INFO L231 Difference]: Finished difference. Result has 289 places, 486 transitions, 9151 flow [2024-06-21 17:21:58,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9046, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9151, PETRI_PLACES=289, PETRI_TRANSITIONS=486} [2024-06-21 17:21:58,023 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-21 17:21:58,023 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 486 transitions, 9151 flow [2024-06-21 17:21:58,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:58,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:58,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:58,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 17:21:58,023 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:21:58,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:58,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1848487560, now seen corresponding path program 2 times [2024-06-21 17:21:58,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:58,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91592955] [2024-06-21 17:21:58,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:58,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:58,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:01,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:01,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:01,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91592955] [2024-06-21 17:22:01,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91592955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:01,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:01,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:22:01,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380088835] [2024-06-21 17:22:01,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:01,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:22:01,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:01,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:22:01,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:22:01,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:22:01,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 486 transitions, 9151 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:01,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:01,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:22:01,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:04,634 INFO L124 PetriNetUnfolderBase]: 6528/10232 cut-off events. [2024-06-21 17:22:04,634 INFO L125 PetriNetUnfolderBase]: For 920441/920443 co-relation queries the response was YES. [2024-06-21 17:22:04,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86048 conditions, 10232 events. 6528/10232 cut-off events. For 920441/920443 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 65052 event pairs, 2256 based on Foata normal form. 14/10245 useless extension candidates. Maximal degree in co-relation 85914. Up to 9729 conditions per place. [2024-06-21 17:22:04,752 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 474 selfloop transitions, 43 changer transitions 0/521 dead transitions. [2024-06-21 17:22:04,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 521 transitions, 10337 flow [2024-06-21 17:22:04,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:22:04,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:22:04,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-21 17:22:04,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-21 17:22:04,754 INFO L175 Difference]: Start difference. First operand has 289 places, 486 transitions, 9151 flow. Second operand 9 states and 147 transitions. [2024-06-21 17:22:04,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 521 transitions, 10337 flow [2024-06-21 17:22:06,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 521 transitions, 10236 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 17:22:06,881 INFO L231 Difference]: Finished difference. Result has 290 places, 488 transitions, 9190 flow [2024-06-21 17:22:06,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9050, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9190, PETRI_PLACES=290, PETRI_TRANSITIONS=488} [2024-06-21 17:22:06,881 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 247 predicate places. [2024-06-21 17:22:06,881 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 488 transitions, 9190 flow [2024-06-21 17:22:06,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:06,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:06,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:06,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 17:22:06,882 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:22:06,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:06,882 INFO L85 PathProgramCache]: Analyzing trace with hash -488987440, now seen corresponding path program 3 times [2024-06-21 17:22:06,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:06,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014547233] [2024-06-21 17:22:06,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:06,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:06,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:10,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:10,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:10,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014547233] [2024-06-21 17:22:10,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014547233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:10,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:10,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:22:10,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082213336] [2024-06-21 17:22:10,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:10,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:22:10,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:10,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:22:10,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:22:10,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:22:10,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 488 transitions, 9190 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:10,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:10,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:22:10,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:13,040 INFO L124 PetriNetUnfolderBase]: 6536/10245 cut-off events. [2024-06-21 17:22:13,040 INFO L125 PetriNetUnfolderBase]: For 897451/897455 co-relation queries the response was YES. [2024-06-21 17:22:13,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86272 conditions, 10245 events. 6536/10245 cut-off events. For 897451/897455 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 65106 event pairs, 2245 based on Foata normal form. 4/10248 useless extension candidates. Maximal degree in co-relation 86137. Up to 9851 conditions per place. [2024-06-21 17:22:13,183 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 469 selfloop transitions, 40 changer transitions 0/513 dead transitions. [2024-06-21 17:22:13,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 513 transitions, 10314 flow [2024-06-21 17:22:13,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:22:13,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:22:13,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 17:22:13,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-21 17:22:13,185 INFO L175 Difference]: Start difference. First operand has 290 places, 488 transitions, 9190 flow. Second operand 8 states and 127 transitions. [2024-06-21 17:22:13,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 513 transitions, 10314 flow [2024-06-21 17:22:15,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 513 transitions, 10202 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-21 17:22:15,942 INFO L231 Difference]: Finished difference. Result has 291 places, 490 transitions, 9211 flow [2024-06-21 17:22:15,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9082, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9211, PETRI_PLACES=291, PETRI_TRANSITIONS=490} [2024-06-21 17:22:15,943 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 248 predicate places. [2024-06-21 17:22:15,943 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 490 transitions, 9211 flow [2024-06-21 17:22:15,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:15,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:15,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:15,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 17:22:15,943 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:22:15,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:15,944 INFO L85 PathProgramCache]: Analyzing trace with hash -488690770, now seen corresponding path program 4 times [2024-06-21 17:22:15,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:15,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739894545] [2024-06-21 17:22:15,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:15,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:15,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:18,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:18,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:18,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739894545] [2024-06-21 17:22:18,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739894545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:18,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:18,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:22:18,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637609642] [2024-06-21 17:22:18,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:18,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:22:18,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:18,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:22:18,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:22:18,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:22:18,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 490 transitions, 9211 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:18,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:18,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:22:18,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:21,863 INFO L124 PetriNetUnfolderBase]: 6531/10262 cut-off events. [2024-06-21 17:22:21,863 INFO L125 PetriNetUnfolderBase]: For 894821/894825 co-relation queries the response was YES. [2024-06-21 17:22:21,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85933 conditions, 10262 events. 6531/10262 cut-off events. For 894821/894825 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 65406 event pairs, 2246 based on Foata normal form. 4/10265 useless extension candidates. Maximal degree in co-relation 85797. Up to 9714 conditions per place. [2024-06-21 17:22:21,993 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 469 selfloop transitions, 47 changer transitions 0/520 dead transitions. [2024-06-21 17:22:21,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 520 transitions, 10383 flow [2024-06-21 17:22:21,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:22:21,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:22:21,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 17:22:21,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-21 17:22:21,995 INFO L175 Difference]: Start difference. First operand has 291 places, 490 transitions, 9211 flow. Second operand 8 states and 132 transitions. [2024-06-21 17:22:21,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 520 transitions, 10383 flow [2024-06-21 17:22:23,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 520 transitions, 10270 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 17:22:23,983 INFO L231 Difference]: Finished difference. Result has 293 places, 492 transitions, 9245 flow [2024-06-21 17:22:23,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9098, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9245, PETRI_PLACES=293, PETRI_TRANSITIONS=492} [2024-06-21 17:22:23,984 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 250 predicate places. [2024-06-21 17:22:23,984 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 492 transitions, 9245 flow [2024-06-21 17:22:23,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:23,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:23,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:23,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 17:22:23,985 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:22:23,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:23,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1517090771, now seen corresponding path program 1 times [2024-06-21 17:22:23,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:23,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668255975] [2024-06-21 17:22:23,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:23,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:24,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:27,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:27,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:27,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668255975] [2024-06-21 17:22:27,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668255975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:27,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:27,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:22:27,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157718915] [2024-06-21 17:22:27,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:27,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:22:27,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:27,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:22:27,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:22:27,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:22:27,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 492 transitions, 9245 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:27,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:27,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:22:27,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:30,931 INFO L124 PetriNetUnfolderBase]: 6921/10910 cut-off events. [2024-06-21 17:22:30,931 INFO L125 PetriNetUnfolderBase]: For 1093731/1093745 co-relation queries the response was YES. [2024-06-21 17:22:31,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91924 conditions, 10910 events. 6921/10910 cut-off events. For 1093731/1093745 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 70489 event pairs, 1983 based on Foata normal form. 62/10971 useless extension candidates. Maximal degree in co-relation 91787. Up to 9599 conditions per place. [2024-06-21 17:22:31,062 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 445 selfloop transitions, 99 changer transitions 0/548 dead transitions. [2024-06-21 17:22:31,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 548 transitions, 10762 flow [2024-06-21 17:22:31,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:22:31,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:22:31,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-21 17:22:31,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-21 17:22:31,063 INFO L175 Difference]: Start difference. First operand has 293 places, 492 transitions, 9245 flow. Second operand 10 states and 176 transitions. [2024-06-21 17:22:31,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 548 transitions, 10762 flow [2024-06-21 17:22:33,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 548 transitions, 10631 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-21 17:22:33,737 INFO L231 Difference]: Finished difference. Result has 298 places, 496 transitions, 9436 flow [2024-06-21 17:22:33,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9114, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9436, PETRI_PLACES=298, PETRI_TRANSITIONS=496} [2024-06-21 17:22:33,737 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 255 predicate places. [2024-06-21 17:22:33,738 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 496 transitions, 9436 flow [2024-06-21 17:22:33,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:33,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:33,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:33,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 17:22:33,738 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:22:33,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:33,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1526613971, now seen corresponding path program 2 times [2024-06-21 17:22:33,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:33,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672701290] [2024-06-21 17:22:33,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:33,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:33,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:36,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:36,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:36,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672701290] [2024-06-21 17:22:36,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672701290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:36,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:36,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:22:36,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897751621] [2024-06-21 17:22:36,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:36,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:22:36,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:36,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:22:36,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:22:36,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:22:36,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 496 transitions, 9436 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:36,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:36,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:22:36,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:40,556 INFO L124 PetriNetUnfolderBase]: 7133/11250 cut-off events. [2024-06-21 17:22:40,556 INFO L125 PetriNetUnfolderBase]: For 1171488/1171502 co-relation queries the response was YES. [2024-06-21 17:22:40,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94052 conditions, 11250 events. 7133/11250 cut-off events. For 1171488/1171502 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 73162 event pairs, 2615 based on Foata normal form. 78/11327 useless extension candidates. Maximal degree in co-relation 93913. Up to 10267 conditions per place. [2024-06-21 17:22:40,685 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 427 selfloop transitions, 101 changer transitions 8/540 dead transitions. [2024-06-21 17:22:40,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 540 transitions, 10688 flow [2024-06-21 17:22:40,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:22:40,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:22:40,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-21 17:22:40,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4023809523809524 [2024-06-21 17:22:40,687 INFO L175 Difference]: Start difference. First operand has 298 places, 496 transitions, 9436 flow. Second operand 10 states and 169 transitions. [2024-06-21 17:22:40,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 540 transitions, 10688 flow [2024-06-21 17:22:42,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 540 transitions, 10421 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-21 17:22:42,801 INFO L231 Difference]: Finished difference. Result has 302 places, 494 transitions, 9332 flow [2024-06-21 17:22:42,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9169, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9332, PETRI_PLACES=302, PETRI_TRANSITIONS=494} [2024-06-21 17:22:42,801 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 259 predicate places. [2024-06-21 17:22:42,801 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 494 transitions, 9332 flow [2024-06-21 17:22:42,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:42,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:42,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:42,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 17:22:42,802 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:22:42,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:42,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1694192791, now seen corresponding path program 3 times [2024-06-21 17:22:42,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:42,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750089610] [2024-06-21 17:22:42,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:42,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:42,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:46,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:46,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:46,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750089610] [2024-06-21 17:22:46,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750089610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:46,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:46,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:22:46,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45132389] [2024-06-21 17:22:46,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:46,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:22:46,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:46,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:22:46,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:22:46,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:22:46,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 494 transitions, 9332 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:46,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:46,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:22:46,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:50,007 INFO L124 PetriNetUnfolderBase]: 7281/11514 cut-off events. [2024-06-21 17:22:50,008 INFO L125 PetriNetUnfolderBase]: For 1180405/1180419 co-relation queries the response was YES. [2024-06-21 17:22:50,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94551 conditions, 11514 events. 7281/11514 cut-off events. For 1180405/1180419 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 75588 event pairs, 2667 based on Foata normal form. 70/11583 useless extension candidates. Maximal degree in co-relation 94411. Up to 10247 conditions per place. [2024-06-21 17:22:50,141 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 430 selfloop transitions, 98 changer transitions 18/550 dead transitions. [2024-06-21 17:22:50,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 550 transitions, 10694 flow [2024-06-21 17:22:50,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:22:50,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:22:50,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-21 17:22:50,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-21 17:22:50,143 INFO L175 Difference]: Start difference. First operand has 302 places, 494 transitions, 9332 flow. Second operand 10 states and 176 transitions. [2024-06-21 17:22:50,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 550 transitions, 10694 flow [2024-06-21 17:22:52,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 550 transitions, 10497 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 17:22:52,236 INFO L231 Difference]: Finished difference. Result has 306 places, 491 transitions, 9215 flow [2024-06-21 17:22:52,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9135, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9215, PETRI_PLACES=306, PETRI_TRANSITIONS=491} [2024-06-21 17:22:52,237 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 263 predicate places. [2024-06-21 17:22:52,237 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 491 transitions, 9215 flow [2024-06-21 17:22:52,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:52,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:52,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:52,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 17:22:52,238 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:22:52,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:52,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1739748951, now seen corresponding path program 4 times [2024-06-21 17:22:52,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:52,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288043123] [2024-06-21 17:22:52,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:52,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:52,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:55,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:55,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:55,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288043123] [2024-06-21 17:22:55,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288043123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:55,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:55,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:22:55,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971063450] [2024-06-21 17:22:55,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:55,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:22:55,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:55,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:22:55,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:22:55,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:22:55,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 491 transitions, 9215 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:55,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:55,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:22:55,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:59,038 INFO L124 PetriNetUnfolderBase]: 7189/11370 cut-off events. [2024-06-21 17:22:59,039 INFO L125 PetriNetUnfolderBase]: For 1234964/1234972 co-relation queries the response was YES. [2024-06-21 17:22:59,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94631 conditions, 11370 events. 7189/11370 cut-off events. For 1234964/1234972 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 74555 event pairs, 2584 based on Foata normal form. 70/11439 useless extension candidates. Maximal degree in co-relation 94489. Up to 9791 conditions per place. [2024-06-21 17:22:59,196 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 369 selfloop transitions, 141 changer transitions 14/528 dead transitions. [2024-06-21 17:22:59,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 528 transitions, 10421 flow [2024-06-21 17:22:59,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:22:59,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:22:59,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-21 17:22:59,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-21 17:22:59,198 INFO L175 Difference]: Start difference. First operand has 306 places, 491 transitions, 9215 flow. Second operand 10 states and 165 transitions. [2024-06-21 17:22:59,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 528 transitions, 10421 flow [2024-06-21 17:23:01,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 528 transitions, 10210 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-21 17:23:01,597 INFO L231 Difference]: Finished difference. Result has 306 places, 483 transitions, 9090 flow [2024-06-21 17:23:01,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9004, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9090, PETRI_PLACES=306, PETRI_TRANSITIONS=483} [2024-06-21 17:23:01,597 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 263 predicate places. [2024-06-21 17:23:01,597 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 483 transitions, 9090 flow [2024-06-21 17:23:01,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:01,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:01,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:23:01,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 17:23:01,598 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:23:01,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:01,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1390293723, now seen corresponding path program 5 times [2024-06-21 17:23:01,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:01,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239505675] [2024-06-21 17:23:01,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:01,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:01,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:05,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:23:05,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:05,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239505675] [2024-06-21 17:23:05,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239505675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:05,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:05,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:23:05,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358002466] [2024-06-21 17:23:05,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:05,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:23:05,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:05,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:23:05,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:23:05,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:23:05,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 483 transitions, 9090 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:05,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:05,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:23:05,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:08,432 INFO L124 PetriNetUnfolderBase]: 7081/11234 cut-off events. [2024-06-21 17:23:08,432 INFO L125 PetriNetUnfolderBase]: For 1266770/1266778 co-relation queries the response was YES. [2024-06-21 17:23:08,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93675 conditions, 11234 events. 7081/11234 cut-off events. For 1266770/1266778 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 73923 event pairs, 2626 based on Foata normal form. 70/11303 useless extension candidates. Maximal degree in co-relation 93533. Up to 9803 conditions per place. [2024-06-21 17:23:08,586 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 362 selfloop transitions, 147 changer transitions 9/522 dead transitions. [2024-06-21 17:23:08,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 522 transitions, 10292 flow [2024-06-21 17:23:08,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:23:08,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:23:08,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 180 transitions. [2024-06-21 17:23:08,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38961038961038963 [2024-06-21 17:23:08,588 INFO L175 Difference]: Start difference. First operand has 306 places, 483 transitions, 9090 flow. Second operand 11 states and 180 transitions. [2024-06-21 17:23:08,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 522 transitions, 10292 flow [2024-06-21 17:23:11,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 522 transitions, 10019 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 17:23:11,043 INFO L231 Difference]: Finished difference. Result has 309 places, 480 transitions, 9064 flow [2024-06-21 17:23:11,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8817, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9064, PETRI_PLACES=309, PETRI_TRANSITIONS=480} [2024-06-21 17:23:11,044 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 266 predicate places. [2024-06-21 17:23:11,044 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 480 transitions, 9064 flow [2024-06-21 17:23:11,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:11,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:11,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:23:11,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 17:23:11,044 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:23:11,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:11,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1728697761, now seen corresponding path program 6 times [2024-06-21 17:23:11,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:11,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202209105] [2024-06-21 17:23:11,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:11,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:11,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:14,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:23:14,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:14,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202209105] [2024-06-21 17:23:14,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202209105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:14,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:14,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:23:14,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208178538] [2024-06-21 17:23:14,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:14,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:23:14,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:14,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:23:14,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:23:14,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:23:14,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 480 transitions, 9064 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:14,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:14,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:23:14,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:18,016 INFO L124 PetriNetUnfolderBase]: 7257/11546 cut-off events. [2024-06-21 17:23:18,017 INFO L125 PetriNetUnfolderBase]: For 1279552/1279560 co-relation queries the response was YES. [2024-06-21 17:23:18,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94749 conditions, 11546 events. 7257/11546 cut-off events. For 1279552/1279560 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 76648 event pairs, 2688 based on Foata normal form. 62/11607 useless extension candidates. Maximal degree in co-relation 94607. Up to 9723 conditions per place. [2024-06-21 17:23:18,179 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 363 selfloop transitions, 131 changer transitions 33/531 dead transitions. [2024-06-21 17:23:18,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 531 transitions, 10384 flow [2024-06-21 17:23:18,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:23:18,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:23:18,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 184 transitions. [2024-06-21 17:23:18,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39826839826839827 [2024-06-21 17:23:18,181 INFO L175 Difference]: Start difference. First operand has 309 places, 480 transitions, 9064 flow. Second operand 11 states and 184 transitions. [2024-06-21 17:23:18,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 531 transitions, 10384 flow [2024-06-21 17:23:21,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 531 transitions, 10081 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-21 17:23:21,179 INFO L231 Difference]: Finished difference. Result has 312 places, 463 transitions, 8630 flow [2024-06-21 17:23:21,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8761, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8630, PETRI_PLACES=312, PETRI_TRANSITIONS=463} [2024-06-21 17:23:21,180 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-21 17:23:21,180 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 463 transitions, 8630 flow [2024-06-21 17:23:21,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:21,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:21,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:23:21,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 17:23:21,180 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:23:21,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:21,181 INFO L85 PathProgramCache]: Analyzing trace with hash 853473467, now seen corresponding path program 1 times [2024-06-21 17:23:21,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:21,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201350118] [2024-06-21 17:23:21,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:21,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:21,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:23,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:23:23,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:23,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201350118] [2024-06-21 17:23:23,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201350118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:23,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:23,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:23:23,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593665129] [2024-06-21 17:23:23,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:23,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:23:23,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:23,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:23:23,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:23:23,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:23:23,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 463 transitions, 8630 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:23,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:23,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:23:23,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:27,226 INFO L124 PetriNetUnfolderBase]: 6807/10814 cut-off events. [2024-06-21 17:23:27,226 INFO L125 PetriNetUnfolderBase]: For 1184027/1184041 co-relation queries the response was YES. [2024-06-21 17:23:27,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91889 conditions, 10814 events. 6807/10814 cut-off events. For 1184027/1184041 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 70799 event pairs, 2508 based on Foata normal form. 16/10829 useless extension candidates. Maximal degree in co-relation 91745. Up to 9132 conditions per place. [2024-06-21 17:23:27,386 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 306 selfloop transitions, 210 changer transitions 0/520 dead transitions. [2024-06-21 17:23:27,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 520 transitions, 10240 flow [2024-06-21 17:23:27,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:23:27,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:23:27,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-21 17:23:27,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-21 17:23:27,388 INFO L175 Difference]: Start difference. First operand has 312 places, 463 transitions, 8630 flow. Second operand 10 states and 185 transitions. [2024-06-21 17:23:27,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 520 transitions, 10240 flow [2024-06-21 17:23:30,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 520 transitions, 9942 flow, removed 19 selfloop flow, removed 10 redundant places. [2024-06-21 17:23:30,145 INFO L231 Difference]: Finished difference. Result has 312 places, 466 transitions, 8841 flow [2024-06-21 17:23:30,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8332, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8841, PETRI_PLACES=312, PETRI_TRANSITIONS=466} [2024-06-21 17:23:30,145 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-21 17:23:30,145 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 466 transitions, 8841 flow [2024-06-21 17:23:30,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:30,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:30,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:23:30,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 17:23:30,146 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:23:30,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:30,146 INFO L85 PathProgramCache]: Analyzing trace with hash 858835847, now seen corresponding path program 2 times [2024-06-21 17:23:30,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:30,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282155673] [2024-06-21 17:23:30,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:30,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:30,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:33,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:23:33,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:33,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282155673] [2024-06-21 17:23:33,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282155673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:33,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:33,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:23:33,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444807525] [2024-06-21 17:23:33,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:33,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:23:33,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:33,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:23:33,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:23:33,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:23:33,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 466 transitions, 8841 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:33,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:33,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:23:33,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:36,442 INFO L124 PetriNetUnfolderBase]: 6817/10824 cut-off events. [2024-06-21 17:23:36,443 INFO L125 PetriNetUnfolderBase]: For 1213138/1213146 co-relation queries the response was YES. [2024-06-21 17:23:36,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92882 conditions, 10824 events. 6817/10824 cut-off events. For 1213138/1213146 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 70836 event pairs, 2462 based on Foata normal form. 8/10831 useless extension candidates. Maximal degree in co-relation 92738. Up to 9138 conditions per place. [2024-06-21 17:23:36,587 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 309 selfloop transitions, 196 changer transitions 0/509 dead transitions. [2024-06-21 17:23:36,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 509 transitions, 10415 flow [2024-06-21 17:23:36,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:23:36,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:23:36,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 17:23:36,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-21 17:23:36,589 INFO L175 Difference]: Start difference. First operand has 312 places, 466 transitions, 8841 flow. Second operand 9 states and 156 transitions. [2024-06-21 17:23:36,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 509 transitions, 10415 flow [2024-06-21 17:23:39,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 509 transitions, 9886 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-21 17:23:39,420 INFO L231 Difference]: Finished difference. Result has 313 places, 472 transitions, 8885 flow [2024-06-21 17:23:39,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8324, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8885, PETRI_PLACES=313, PETRI_TRANSITIONS=472} [2024-06-21 17:23:39,421 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 270 predicate places. [2024-06-21 17:23:39,421 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 472 transitions, 8885 flow [2024-06-21 17:23:39,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:39,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:39,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:23:39,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 17:23:39,422 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:23:39,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:39,422 INFO L85 PathProgramCache]: Analyzing trace with hash 532685587, now seen corresponding path program 3 times [2024-06-21 17:23:39,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:39,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756006657] [2024-06-21 17:23:39,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:39,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:39,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:42,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:23:42,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:42,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756006657] [2024-06-21 17:23:42,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756006657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:42,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:42,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:23:42,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603558734] [2024-06-21 17:23:42,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:42,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:23:42,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:42,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:23:42,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:23:42,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:23:42,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 472 transitions, 8885 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:42,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:42,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:23:42,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:45,405 INFO L124 PetriNetUnfolderBase]: 6811/10812 cut-off events. [2024-06-21 17:23:45,406 INFO L125 PetriNetUnfolderBase]: For 1239023/1239031 co-relation queries the response was YES. [2024-06-21 17:23:45,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92960 conditions, 10812 events. 6811/10812 cut-off events. For 1239023/1239031 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 70699 event pairs, 2464 based on Foata normal form. 8/10819 useless extension candidates. Maximal degree in co-relation 92815. Up to 9135 conditions per place. [2024-06-21 17:23:45,566 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 302 selfloop transitions, 197 changer transitions 0/503 dead transitions. [2024-06-21 17:23:45,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 503 transitions, 10113 flow [2024-06-21 17:23:45,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:23:45,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:23:45,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 17:23:45,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-21 17:23:45,567 INFO L175 Difference]: Start difference. First operand has 313 places, 472 transitions, 8885 flow. Second operand 9 states and 151 transitions. [2024-06-21 17:23:45,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 503 transitions, 10113 flow [2024-06-21 17:23:49,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 503 transitions, 9843 flow, removed 63 selfloop flow, removed 4 redundant places. [2024-06-21 17:23:49,138 INFO L231 Difference]: Finished difference. Result has 318 places, 472 transitions, 9016 flow [2024-06-21 17:23:49,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8615, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9016, PETRI_PLACES=318, PETRI_TRANSITIONS=472} [2024-06-21 17:23:49,138 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 275 predicate places. [2024-06-21 17:23:49,138 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 472 transitions, 9016 flow [2024-06-21 17:23:49,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:49,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:49,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:23:49,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 17:23:49,139 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:23:49,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:49,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1708335341, now seen corresponding path program 1 times [2024-06-21 17:23:49,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:49,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484324588] [2024-06-21 17:23:49,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:49,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:49,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:52,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:23:52,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:52,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484324588] [2024-06-21 17:23:52,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484324588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:52,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:52,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:23:52,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527149743] [2024-06-21 17:23:52,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:52,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:23:52,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:52,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:23:52,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:23:52,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:23:52,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 472 transitions, 9016 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:52,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:52,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:23:52,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:56,184 INFO L124 PetriNetUnfolderBase]: 6787/10780 cut-off events. [2024-06-21 17:23:56,184 INFO L125 PetriNetUnfolderBase]: For 1269269/1269273 co-relation queries the response was YES. [2024-06-21 17:23:56,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93338 conditions, 10780 events. 6787/10780 cut-off events. For 1269269/1269273 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 70500 event pairs, 2486 based on Foata normal form. 10/10789 useless extension candidates. Maximal degree in co-relation 93191. Up to 9123 conditions per place. [2024-06-21 17:23:56,308 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 301 selfloop transitions, 213 changer transitions 0/518 dead transitions. [2024-06-21 17:23:56,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 518 transitions, 10326 flow [2024-06-21 17:23:56,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:23:56,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:23:56,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 190 transitions. [2024-06-21 17:23:56,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41125541125541126 [2024-06-21 17:23:56,310 INFO L175 Difference]: Start difference. First operand has 318 places, 472 transitions, 9016 flow. Second operand 11 states and 190 transitions. [2024-06-21 17:23:56,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 518 transitions, 10326 flow [2024-06-21 17:23:59,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 518 transitions, 9881 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-21 17:23:59,387 INFO L231 Difference]: Finished difference. Result has 321 places, 472 transitions, 9004 flow [2024-06-21 17:23:59,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8571, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9004, PETRI_PLACES=321, PETRI_TRANSITIONS=472} [2024-06-21 17:23:59,387 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 278 predicate places. [2024-06-21 17:23:59,388 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 472 transitions, 9004 flow [2024-06-21 17:23:59,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:59,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:59,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:23:59,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 17:23:59,388 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:23:59,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:59,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1379169249, now seen corresponding path program 1 times [2024-06-21 17:23:59,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:59,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734537025] [2024-06-21 17:23:59,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:59,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:59,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:24:03,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:24:03,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:24:03,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734537025] [2024-06-21 17:24:03,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734537025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:24:03,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:24:03,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:24:03,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987841266] [2024-06-21 17:24:03,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:24:03,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:24:03,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:24:03,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:24:03,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:24:03,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:24:03,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 472 transitions, 9004 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:24:03,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:24:03,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:24:03,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:24:07,225 INFO L124 PetriNetUnfolderBase]: 7511/11962 cut-off events. [2024-06-21 17:24:07,225 INFO L125 PetriNetUnfolderBase]: For 1669281/1669289 co-relation queries the response was YES. [2024-06-21 17:24:07,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106229 conditions, 11962 events. 7511/11962 cut-off events. For 1669281/1669289 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 79769 event pairs, 2674 based on Foata normal form. 54/12015 useless extension candidates. Maximal degree in co-relation 106081. Up to 9479 conditions per place. [2024-06-21 17:24:07,399 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 386 selfloop transitions, 132 changer transitions 0/522 dead transitions. [2024-06-21 17:24:07,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 522 transitions, 10539 flow [2024-06-21 17:24:07,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:24:07,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:24:07,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-21 17:24:07,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 17:24:07,401 INFO L175 Difference]: Start difference. First operand has 321 places, 472 transitions, 9004 flow. Second operand 10 states and 170 transitions. [2024-06-21 17:24:07,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 522 transitions, 10539 flow [2024-06-21 17:24:11,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 522 transitions, 10055 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-21 17:24:11,606 INFO L231 Difference]: Finished difference. Result has 322 places, 480 transitions, 9036 flow [2024-06-21 17:24:11,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8520, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9036, PETRI_PLACES=322, PETRI_TRANSITIONS=480} [2024-06-21 17:24:11,607 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 279 predicate places. [2024-06-21 17:24:11,607 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 480 transitions, 9036 flow [2024-06-21 17:24:11,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:24:11,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:24:11,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:24:11,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 17:24:11,608 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:24:11,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:24:11,608 INFO L85 PathProgramCache]: Analyzing trace with hash 565747621, now seen corresponding path program 7 times [2024-06-21 17:24:11,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:24:11,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221538167] [2024-06-21 17:24:11,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:24:11,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:24:11,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:24:15,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:24:15,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:24:15,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221538167] [2024-06-21 17:24:15,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221538167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:24:15,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:24:15,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:24:15,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33285469] [2024-06-21 17:24:15,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:24:15,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:24:15,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:24:15,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:24:15,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:24:15,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:24:15,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 480 transitions, 9036 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:24:15,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:24:15,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:24:15,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:24:19,646 INFO L124 PetriNetUnfolderBase]: 7723/12314 cut-off events. [2024-06-21 17:24:19,647 INFO L125 PetriNetUnfolderBase]: For 1777266/1777280 co-relation queries the response was YES. [2024-06-21 17:24:19,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108311 conditions, 12314 events. 7723/12314 cut-off events. For 1777266/1777280 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 82842 event pairs, 2932 based on Foata normal form. 78/12391 useless extension candidates. Maximal degree in co-relation 108161. Up to 10323 conditions per place. [2024-06-21 17:24:19,826 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 324 selfloop transitions, 200 changer transitions 8/536 dead transitions. [2024-06-21 17:24:19,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 536 transitions, 10340 flow [2024-06-21 17:24:19,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:24:19,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:24:19,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-21 17:24:19,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-21 17:24:19,827 INFO L175 Difference]: Start difference. First operand has 322 places, 480 transitions, 9036 flow. Second operand 10 states and 186 transitions. [2024-06-21 17:24:19,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 536 transitions, 10340 flow [2024-06-21 17:24:23,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 536 transitions, 10134 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-21 17:24:23,623 INFO L231 Difference]: Finished difference. Result has 326 places, 478 transitions, 9225 flow [2024-06-21 17:24:23,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8830, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9225, PETRI_PLACES=326, PETRI_TRANSITIONS=478} [2024-06-21 17:24:23,623 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-21 17:24:23,624 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 478 transitions, 9225 flow [2024-06-21 17:24:23,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:24:23,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:24:23,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:24:23,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 17:24:23,624 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:24:23,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:24:23,625 INFO L85 PathProgramCache]: Analyzing trace with hash 2076477507, now seen corresponding path program 8 times [2024-06-21 17:24:23,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:24:23,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989370165] [2024-06-21 17:24:23,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:24:23,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:24:23,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:24:27,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:24:27,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:24:27,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989370165] [2024-06-21 17:24:27,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989370165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:24:27,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:24:27,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:24:27,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488034648] [2024-06-21 17:24:27,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:24:27,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:24:27,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:24:27,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:24:27,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:24:27,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:24:27,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 478 transitions, 9225 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:24:27,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:24:27,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:24:27,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:24:31,606 INFO L124 PetriNetUnfolderBase]: 7715/12322 cut-off events. [2024-06-21 17:24:31,606 INFO L125 PetriNetUnfolderBase]: For 1801231/1801245 co-relation queries the response was YES. [2024-06-21 17:24:31,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109463 conditions, 12322 events. 7715/12322 cut-off events. For 1801231/1801245 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 82991 event pairs, 2386 based on Foata normal form. 70/12391 useless extension candidates. Maximal degree in co-relation 109311. Up to 8587 conditions per place. [2024-06-21 17:24:31,761 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 318 selfloop transitions, 204 changer transitions 19/545 dead transitions. [2024-06-21 17:24:31,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 545 transitions, 10763 flow [2024-06-21 17:24:31,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:24:31,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:24:31,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-21 17:24:31,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-21 17:24:31,762 INFO L175 Difference]: Start difference. First operand has 326 places, 478 transitions, 9225 flow. Second operand 10 states and 196 transitions. [2024-06-21 17:24:31,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 545 transitions, 10763 flow [2024-06-21 17:24:35,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 545 transitions, 10338 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-21 17:24:35,961 INFO L231 Difference]: Finished difference. Result has 328 places, 465 transitions, 9005 flow [2024-06-21 17:24:35,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8812, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9005, PETRI_PLACES=328, PETRI_TRANSITIONS=465} [2024-06-21 17:24:35,962 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 285 predicate places. [2024-06-21 17:24:35,962 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 465 transitions, 9005 flow [2024-06-21 17:24:35,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:24:35,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:24:35,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:24:35,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 17:24:35,963 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:24:35,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:24:35,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1587043419, now seen corresponding path program 9 times [2024-06-21 17:24:35,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:24:35,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105115608] [2024-06-21 17:24:35,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:24:35,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:24:35,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:24:39,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:24:39,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:24:39,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105115608] [2024-06-21 17:24:39,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105115608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:24:39,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:24:39,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:24:39,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412081530] [2024-06-21 17:24:39,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:24:39,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:24:39,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:24:39,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:24:39,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:24:39,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:24:39,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 465 transitions, 9005 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:24:39,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:24:39,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:24:39,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:24:44,047 INFO L124 PetriNetUnfolderBase]: 7584/12103 cut-off events. [2024-06-21 17:24:44,047 INFO L125 PetriNetUnfolderBase]: For 1758697/1758713 co-relation queries the response was YES. [2024-06-21 17:24:44,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107690 conditions, 12103 events. 7584/12103 cut-off events. For 1758697/1758713 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 81014 event pairs, 2442 based on Foata normal form. 73/12174 useless extension candidates. Maximal degree in co-relation 107537. Up to 9684 conditions per place. [2024-06-21 17:24:44,204 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 263 selfloop transitions, 231 changer transitions 5/503 dead transitions. [2024-06-21 17:24:44,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 503 transitions, 10483 flow [2024-06-21 17:24:44,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:24:44,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:24:44,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 17:24:44,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-21 17:24:44,206 INFO L175 Difference]: Start difference. First operand has 328 places, 465 transitions, 9005 flow. Second operand 9 states and 161 transitions. [2024-06-21 17:24:44,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 503 transitions, 10483 flow [2024-06-21 17:24:47,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 503 transitions, 10028 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-21 17:24:47,913 INFO L231 Difference]: Finished difference. Result has 327 places, 466 transitions, 9072 flow [2024-06-21 17:24:47,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8550, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9072, PETRI_PLACES=327, PETRI_TRANSITIONS=466} [2024-06-21 17:24:47,914 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 284 predicate places. [2024-06-21 17:24:47,914 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 466 transitions, 9072 flow [2024-06-21 17:24:47,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:24:47,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:24:47,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:24:47,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 17:24:47,914 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:24:47,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:24:47,915 INFO L85 PathProgramCache]: Analyzing trace with hash 2087528697, now seen corresponding path program 10 times [2024-06-21 17:24:47,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:24:47,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717148438] [2024-06-21 17:24:47,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:24:47,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:24:47,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:24:52,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:24:52,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:24:52,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717148438] [2024-06-21 17:24:52,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717148438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:24:52,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:24:52,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:24:52,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263458918] [2024-06-21 17:24:52,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:24:52,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:24:52,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:24:52,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:24:52,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:24:52,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:24:52,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 466 transitions, 9072 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:24:52,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:24:52,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:24:52,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:24:56,029 INFO L124 PetriNetUnfolderBase]: 7384/11799 cut-off events. [2024-06-21 17:24:56,030 INFO L125 PetriNetUnfolderBase]: For 1622818/1622826 co-relation queries the response was YES. [2024-06-21 17:24:56,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102076 conditions, 11799 events. 7384/11799 cut-off events. For 1622818/1622826 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 79182 event pairs, 2760 based on Foata normal form. 70/11868 useless extension candidates. Maximal degree in co-relation 101924. Up to 9965 conditions per place. [2024-06-21 17:24:56,190 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 319 selfloop transitions, 171 changer transitions 10/504 dead transitions. [2024-06-21 17:24:56,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 504 transitions, 10204 flow [2024-06-21 17:24:56,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:24:56,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:24:56,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 17:24:56,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-21 17:24:56,191 INFO L175 Difference]: Start difference. First operand has 327 places, 466 transitions, 9072 flow. Second operand 9 states and 157 transitions. [2024-06-21 17:24:56,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 504 transitions, 10204 flow [2024-06-21 17:25:00,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 504 transitions, 9692 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-21 17:25:00,080 INFO L231 Difference]: Finished difference. Result has 329 places, 460 transitions, 8790 flow [2024-06-21 17:25:00,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8560, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8790, PETRI_PLACES=329, PETRI_TRANSITIONS=460} [2024-06-21 17:25:00,080 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 286 predicate places. [2024-06-21 17:25:00,081 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 460 transitions, 8790 flow [2024-06-21 17:25:00,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:25:00,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:25:00,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:25:00,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 17:25:00,081 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:25:00,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:25:00,081 INFO L85 PathProgramCache]: Analyzing trace with hash 515704565, now seen corresponding path program 4 times [2024-06-21 17:25:00,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:25:00,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377441672] [2024-06-21 17:25:00,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:25:00,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:25:00,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:25:03,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:25:03,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:25:03,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377441672] [2024-06-21 17:25:03,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377441672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:25:03,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:25:03,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:25:03,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508037765] [2024-06-21 17:25:03,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:25:03,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:25:03,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:25:03,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:25:03,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:25:03,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:25:03,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 460 transitions, 8790 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:25:03,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:25:03,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:25:03,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:25:07,378 INFO L124 PetriNetUnfolderBase]: 7060/11283 cut-off events. [2024-06-21 17:25:07,378 INFO L125 PetriNetUnfolderBase]: For 1473230/1473246 co-relation queries the response was YES. [2024-06-21 17:25:07,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99718 conditions, 11283 events. 7060/11283 cut-off events. For 1473230/1473246 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 74828 event pairs, 2441 based on Foata normal form. 11/11292 useless extension candidates. Maximal degree in co-relation 99565. Up to 8899 conditions per place. [2024-06-21 17:25:07,595 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 263 selfloop transitions, 239 changer transitions 0/506 dead transitions. [2024-06-21 17:25:07,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 506 transitions, 10572 flow [2024-06-21 17:25:07,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:25:07,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:25:07,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 17:25:07,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-21 17:25:07,597 INFO L175 Difference]: Start difference. First operand has 329 places, 460 transitions, 8790 flow. Second operand 8 states and 150 transitions. [2024-06-21 17:25:07,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 506 transitions, 10572 flow [2024-06-21 17:25:11,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 506 transitions, 10130 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-21 17:25:11,420 INFO L231 Difference]: Finished difference. Result has 328 places, 469 transitions, 9054 flow [2024-06-21 17:25:11,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8354, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9054, PETRI_PLACES=328, PETRI_TRANSITIONS=469} [2024-06-21 17:25:11,420 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 285 predicate places. [2024-06-21 17:25:11,420 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 469 transitions, 9054 flow [2024-06-21 17:25:11,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:25:11,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:25:11,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:25:11,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 17:25:11,421 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:25:11,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:25:11,421 INFO L85 PathProgramCache]: Analyzing trace with hash -628157515, now seen corresponding path program 2 times [2024-06-21 17:25:11,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:25:11,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266262466] [2024-06-21 17:25:11,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:25:11,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:25:11,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:25:14,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:25:14,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:25:14,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266262466] [2024-06-21 17:25:14,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266262466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:25:14,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:25:14,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:25:14,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237817587] [2024-06-21 17:25:14,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:25:14,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:25:14,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:25:14,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:25:14,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:25:14,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:25:14,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 469 transitions, 9054 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:25:14,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:25:14,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:25:14,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:25:18,727 INFO L124 PetriNetUnfolderBase]: 7048/11263 cut-off events. [2024-06-21 17:25:18,728 INFO L125 PetriNetUnfolderBase]: For 1469421/1469423 co-relation queries the response was YES. [2024-06-21 17:25:18,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99369 conditions, 11263 events. 7048/11263 cut-off events. For 1469421/1469423 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 74865 event pairs, 2781 based on Foata normal form. 4/11265 useless extension candidates. Maximal degree in co-relation 99215. Up to 10577 conditions per place. [2024-06-21 17:25:18,862 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 394 selfloop transitions, 105 changer transitions 0/503 dead transitions. [2024-06-21 17:25:18,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 503 transitions, 10152 flow [2024-06-21 17:25:18,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:25:18,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:25:18,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-21 17:25:18,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 17:25:18,864 INFO L175 Difference]: Start difference. First operand has 328 places, 469 transitions, 9054 flow. Second operand 10 states and 160 transitions. [2024-06-21 17:25:18,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 503 transitions, 10152 flow [2024-06-21 17:25:21,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 503 transitions, 9722 flow, removed 76 selfloop flow, removed 5 redundant places. [2024-06-21 17:25:21,883 INFO L231 Difference]: Finished difference. Result has 333 places, 469 transitions, 8840 flow [2024-06-21 17:25:21,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8624, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8840, PETRI_PLACES=333, PETRI_TRANSITIONS=469} [2024-06-21 17:25:21,884 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 290 predicate places. [2024-06-21 17:25:21,884 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 469 transitions, 8840 flow [2024-06-21 17:25:21,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:25:21,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:25:21,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:25:21,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 17:25:21,884 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:25:21,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:25:21,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1712959849, now seen corresponding path program 3 times [2024-06-21 17:25:21,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:25:21,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725853789] [2024-06-21 17:25:21,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:25:21,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:25:21,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:25:25,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:25:25,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:25:25,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725853789] [2024-06-21 17:25:25,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725853789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:25:25,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:25:25,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:25:25,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371859043] [2024-06-21 17:25:25,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:25:25,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:25:25,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:25:25,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:25:25,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:25:25,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:25:25,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 469 transitions, 8840 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:25:25,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:25:25,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:25:25,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:25:29,659 INFO L124 PetriNetUnfolderBase]: 7068/11247 cut-off events. [2024-06-21 17:25:29,659 INFO L125 PetriNetUnfolderBase]: For 1433815/1433817 co-relation queries the response was YES. [2024-06-21 17:25:29,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97595 conditions, 11247 events. 7068/11247 cut-off events. For 1433815/1433817 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 74137 event pairs, 2273 based on Foata normal form. 4/11249 useless extension candidates. Maximal degree in co-relation 97441. Up to 8903 conditions per place. [2024-06-21 17:25:29,796 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 230 selfloop transitions, 280 changer transitions 0/514 dead transitions. [2024-06-21 17:25:29,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 514 transitions, 10509 flow [2024-06-21 17:25:29,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:25:29,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:25:29,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 17:25:29,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-21 17:25:29,797 INFO L175 Difference]: Start difference. First operand has 333 places, 469 transitions, 8840 flow. Second operand 9 states and 166 transitions. [2024-06-21 17:25:29,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 514 transitions, 10509 flow [2024-06-21 17:25:33,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 514 transitions, 10278 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-21 17:25:33,617 INFO L231 Difference]: Finished difference. Result has 333 places, 472 transitions, 9248 flow [2024-06-21 17:25:33,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8609, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=277, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9248, PETRI_PLACES=333, PETRI_TRANSITIONS=472} [2024-06-21 17:25:33,618 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 290 predicate places. [2024-06-21 17:25:33,618 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 472 transitions, 9248 flow [2024-06-21 17:25:33,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:25:33,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:25:33,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:25:33,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 17:25:33,619 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:25:33,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:25:33,619 INFO L85 PathProgramCache]: Analyzing trace with hash 231374917, now seen corresponding path program 5 times [2024-06-21 17:25:33,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:25:33,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864486618] [2024-06-21 17:25:33,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:25:33,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:25:33,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:25:36,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:25:36,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:25:36,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864486618] [2024-06-21 17:25:36,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864486618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:25:36,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:25:36,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:25:36,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334600885] [2024-06-21 17:25:36,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:25:36,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:25:36,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:25:36,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:25:36,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:25:36,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-21 17:25:36,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 472 transitions, 9248 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:25:36,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:25:36,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-21 17:25:36,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand