./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe015_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/safe015_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/safe015_power.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/safe015_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 17:37:19,472 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 17:37:19,536 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 17:37:19,541 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 17:37:19,541 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 17:37:19,565 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 17:37:19,565 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 17:37:19,566 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 17:37:19,566 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 17:37:19,569 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 17:37:19,570 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 17:37:19,570 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 17:37:19,571 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 17:37:19,572 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 17:37:19,572 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 17:37:19,572 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 17:37:19,572 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 17:37:19,573 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 17:37:19,573 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 17:37:19,574 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 17:37:19,574 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 17:37:19,574 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 17:37:19,575 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 17:37:19,575 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 17:37:19,575 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 17:37:19,575 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 17:37:19,576 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 17:37:19,576 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 17:37:19,576 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 17:37:19,577 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 17:37:19,577 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 17:37:19,578 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 17:37:19,578 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:37:19,578 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 17:37:19,578 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 17:37:19,578 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 17:37:19,579 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 17:37:19,579 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 17:37:19,579 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 17:37:19,579 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 17:37:19,579 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 17:37:19,580 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 17:37:19,580 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 17:37:19,580 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 17:37:19,778 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 17:37:19,807 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 17:37:19,810 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 17:37:19,811 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 17:37:19,811 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 17:37:19,812 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe015_power.oepc.i [2024-06-21 17:37:20,848 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 17:37:21,073 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 17:37:21,077 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe015_power.oepc.i [2024-06-21 17:37:21,089 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c9b0f20b/5739fe1b5e4646e2901570f533184742/FLAG7940ea8b8 [2024-06-21 17:37:21,105 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c9b0f20b/5739fe1b5e4646e2901570f533184742 [2024-06-21 17:37:21,107 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 17:37:21,112 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 17:37:21,114 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe015_power.oepc.yml/witness.yml [2024-06-21 17:37:21,338 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 17:37:21,339 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 17:37:21,340 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 17:37:21,340 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 17:37:21,344 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 17:37:21,344 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:37:21" (1/2) ... [2024-06-21 17:37:21,345 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@108f881c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:37:21, skipping insertion in model container [2024-06-21 17:37:21,345 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:37:21" (1/2) ... [2024-06-21 17:37:21,347 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4e25807 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:37:21, skipping insertion in model container [2024-06-21 17:37:21,347 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:37:21" (2/2) ... [2024-06-21 17:37:21,348 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@108f881c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:37:21, skipping insertion in model container [2024-06-21 17:37:21,348 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:37:21" (2/2) ... [2024-06-21 17:37:21,348 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 17:37:21,519 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 17:37:21,520 INFO L97 edCorrectnessWitness]: Location invariant before [L876-L876] (((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd0 == (_Bool)0) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((x$w_buff0 == 0 || x$w_buff0 == 1) || x$w_buff0 == 2))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((x$w_buff1 == 0 || x$w_buff1 == 1) || x$w_buff1 == 2))) && (! multithreaded || x$flush_delayed == (_Bool)0) [2024-06-21 17:37:21,520 INFO L97 edCorrectnessWitness]: Location invariant before [L877-L877] (((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd0 == (_Bool)0) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((x$w_buff0 == 0 || x$w_buff0 == 1) || x$w_buff0 == 2))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((x$w_buff1 == 0 || x$w_buff1 == 1) || x$w_buff1 == 2))) && (! multithreaded || x$flush_delayed == (_Bool)0) [2024-06-21 17:37:21,520 INFO L97 edCorrectnessWitness]: Location invariant before [L874-L874] (((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd0 == (_Bool)0) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((x$w_buff0 == 0 || x$w_buff0 == 1) || x$w_buff0 == 2))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((x$w_buff1 == 0 || x$w_buff1 == 1) || x$w_buff1 == 2))) && (! multithreaded || x$flush_delayed == (_Bool)0) [2024-06-21 17:37:21,521 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 17:37:21,521 INFO L106 edCorrectnessWitness]: ghost_update [L872-L872] multithreaded = 1; [2024-06-21 17:37:21,558 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 17:37:21,901 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:37:21,910 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 17:37:22,060 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:37:22,095 INFO L206 MainTranslator]: Completed translation [2024-06-21 17:37:22,095 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:37:22 WrapperNode [2024-06-21 17:37:22,095 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 17:37:22,096 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 17:37:22,096 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 17:37:22,096 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 17:37:22,101 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 05:37:22" (1/1) ... [2024-06-21 17:37:22,117 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 05:37:22" (1/1) ... [2024-06-21 17:37:22,168 INFO L138 Inliner]: procedures = 175, calls = 93, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 287 [2024-06-21 17:37:22,175 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 17:37:22,176 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 17:37:22,176 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 17:37:22,176 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 17:37:22,184 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 05:37:22" (1/1) ... [2024-06-21 17:37:22,184 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 05:37:22" (1/1) ... [2024-06-21 17:37:22,201 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 05:37:22" (1/1) ... [2024-06-21 17:37:22,226 INFO L175 MemorySlicer]: Split 48 memory accesses to 2 slices as follows [2, 46]. 96 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 9 writes are split as follows [0, 9]. [2024-06-21 17:37:22,231 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 05:37:22" (1/1) ... [2024-06-21 17:37:22,231 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 05:37:22" (1/1) ... [2024-06-21 17:37:22,244 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 05:37:22" (1/1) ... [2024-06-21 17:37:22,251 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 05:37:22" (1/1) ... [2024-06-21 17:37:22,254 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 05:37:22" (1/1) ... [2024-06-21 17:37:22,256 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 05:37:22" (1/1) ... [2024-06-21 17:37:22,265 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 17:37:22,266 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 17:37:22,266 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 17:37:22,266 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 17:37:22,266 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 05:37:22" (1/1) ... [2024-06-21 17:37:22,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:37:22,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 17:37:22,305 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 17:37:22,324 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 17:37:22,337 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-21 17:37:22,338 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-21 17:37:22,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-21 17:37:22,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-21 17:37:22,338 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 17:37:22,338 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 17:37:22,338 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 17:37:22,338 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 17:37:22,339 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 17:37:22,339 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 17:37:22,339 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 17:37:22,339 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 17:37:22,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 17:37:22,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-21 17:37:22,339 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 17:37:22,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 17:37:22,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 17:37:22,341 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 17:37:22,457 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 17:37:22,458 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 17:37:22,986 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 17:37:22,987 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 17:37:23,424 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 17:37:23,424 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 17:37:23,425 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:37:23 BoogieIcfgContainer [2024-06-21 17:37:23,425 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 17:37:23,427 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 17:37:23,427 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 17:37:23,429 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 17:37:23,430 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 05:37:21" (1/4) ... [2024-06-21 17:37:23,430 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a697767 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 05:37:23, skipping insertion in model container [2024-06-21 17:37:23,430 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:37:21" (2/4) ... [2024-06-21 17:37:23,430 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a697767 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 05:37:23, skipping insertion in model container [2024-06-21 17:37:23,431 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 05:37:22" (3/4) ... [2024-06-21 17:37:23,431 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a697767 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 05:37:23, skipping insertion in model container [2024-06-21 17:37:23,431 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:37:23" (4/4) ... [2024-06-21 17:37:23,432 INFO L112 eAbstractionObserver]: Analyzing ICFG safe015_power.oepc.i [2024-06-21 17:37:23,445 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 17:37:23,446 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 17:37:23,446 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 17:37:23,506 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 17:37:23,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-21 17:37:23,562 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-21 17:37:23,562 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:37:23,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 57 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 17:37:23,564 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-21 17:37:23,567 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-21 17:37:23,577 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 17:37:23,583 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;@4d21817e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 17:37:23,583 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 17:37:23,588 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 17:37:23,588 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-21 17:37:23,588 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:37:23,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:37:23,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 17:37:23,589 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 17:37:23,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:37:23,594 INFO L85 PathProgramCache]: Analyzing trace with hash 980274910, now seen corresponding path program 1 times [2024-06-21 17:37:23,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:37:23,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841110287] [2024-06-21 17:37:23,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:37:23,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:37:23,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:37:25,092 INFO 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 17:37:25,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:37:25,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841110287] [2024-06-21 17:37:25,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841110287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:37:25,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:37:25,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 17:37:25,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62436826] [2024-06-21 17:37:25,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:37:25,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 17:37:25,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:37:25,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 17:37:25,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 17:37:25,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 17:37:25,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:25,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:37:25,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 17:37:25,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:37:25,611 INFO L124 PetriNetUnfolderBase]: 1412/2149 cut-off events. [2024-06-21 17:37:25,611 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-21 17:37:25,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4351 conditions, 2149 events. 1412/2149 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10273 event pairs, 956 based on Foata normal form. 1/2113 useless extension candidates. Maximal degree in co-relation 4339. Up to 2115 conditions per place. [2024-06-21 17:37:25,625 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 36 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-06-21 17:37:25,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 46 transitions, 187 flow [2024-06-21 17:37:25,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 17:37:25,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 17:37:25,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-06-21 17:37:25,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426356589147286 [2024-06-21 17:37:25,635 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 70 transitions. [2024-06-21 17:37:25,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 46 transitions, 187 flow [2024-06-21 17:37:25,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 46 transitions, 182 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 17:37:25,638 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-21 17:37:25,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-21 17:37:25,642 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-21 17:37:25,642 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-21 17:37:25,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:25,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:37:25,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:37:25,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 17:37:25,643 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 17:37:25,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:37:25,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1446414493, now seen corresponding path program 1 times [2024-06-21 17:37:25,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:37:25,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128579078] [2024-06-21 17:37:25,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:37:25,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:37:25,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:37:26,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:37:26,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:37:26,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128579078] [2024-06-21 17:37:26,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128579078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:37:26,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:37:26,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 17:37:26,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272007624] [2024-06-21 17:37:26,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:37:26,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 17:37:26,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:37:26,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 17:37:26,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 17:37:26,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 17:37:26,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:26,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:37:26,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 17:37:26,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:37:27,303 INFO L124 PetriNetUnfolderBase]: 1400/2131 cut-off events. [2024-06-21 17:37:27,304 INFO L125 PetriNetUnfolderBase]: For 399/399 co-relation queries the response was YES. [2024-06-21 17:37:27,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4875 conditions, 2131 events. 1400/2131 cut-off events. For 399/399 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10196 event pairs, 654 based on Foata normal form. 6/2134 useless extension candidates. Maximal degree in co-relation 4863. Up to 2059 conditions per place. [2024-06-21 17:37:27,315 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 46 selfloop transitions, 7 changer transitions 0/59 dead transitions. [2024-06-21 17:37:27,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 59 transitions, 266 flow [2024-06-21 17:37:27,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 17:37:27,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 17:37:27,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2024-06-21 17:37:27,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5348837209302325 [2024-06-21 17:37:27,319 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 92 transitions. [2024-06-21 17:37:27,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 59 transitions, 266 flow [2024-06-21 17:37:27,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 59 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 17:37:27,323 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-21 17:37:27,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-21 17:37:27,325 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-21 17:37:27,326 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-21 17:37:27,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:27,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:37:27,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:37:27,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 17:37:27,330 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 17:37:27,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:37:27,331 INFO L85 PathProgramCache]: Analyzing trace with hash -736315365, now seen corresponding path program 1 times [2024-06-21 17:37:27,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:37:27,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643025163] [2024-06-21 17:37:27,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:37:27,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:37:27,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:37:29,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:37:29,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:37:29,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643025163] [2024-06-21 17:37:29,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643025163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:37:29,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:37:29,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:37:29,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016792583] [2024-06-21 17:37:29,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:37:29,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:37:29,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:37:29,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:37:29,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:37:29,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 17:37:29,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:29,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:37:29,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 17:37:29,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:37:30,137 INFO L124 PetriNetUnfolderBase]: 1391/2116 cut-off events. [2024-06-21 17:37:30,138 INFO L125 PetriNetUnfolderBase]: For 1120/1120 co-relation queries the response was YES. [2024-06-21 17:37:30,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5383 conditions, 2116 events. 1391/2116 cut-off events. For 1120/1120 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10100 event pairs, 485 based on Foata normal form. 6/2119 useless extension candidates. Maximal degree in co-relation 5369. Up to 2006 conditions per place. [2024-06-21 17:37:30,146 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 59 selfloop transitions, 12 changer transitions 0/77 dead transitions. [2024-06-21 17:37:30,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 77 transitions, 384 flow [2024-06-21 17:37:30,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:37:30,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:37:30,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-21 17:37:30,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49612403100775193 [2024-06-21 17:37:30,149 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 6 states and 128 transitions. [2024-06-21 17:37:30,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 77 transitions, 384 flow [2024-06-21 17:37:30,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 77 transitions, 364 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-21 17:37:30,151 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 183 flow [2024-06-21 17:37:30,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=183, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-06-21 17:37:30,152 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 7 predicate places. [2024-06-21 17:37:30,152 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 183 flow [2024-06-21 17:37:30,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:30,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:37:30,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:37:30,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 17:37:30,153 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:37:30,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:37:30,154 INFO L85 PathProgramCache]: Analyzing trace with hash 632992938, now seen corresponding path program 1 times [2024-06-21 17:37:30,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:37:30,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346185884] [2024-06-21 17:37:30,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:37:30,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:37:30,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:37:31,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:37:31,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:37:31,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346185884] [2024-06-21 17:37:31,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346185884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:37:31,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:37:31,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:37:31,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963608715] [2024-06-21 17:37:31,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:37:31,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:37:31,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:37:31,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:37:31,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:37:31,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:37:31,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 183 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:31,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:37:31,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:37:31,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:37:31,811 INFO L124 PetriNetUnfolderBase]: 1386/2109 cut-off events. [2024-06-21 17:37:31,811 INFO L125 PetriNetUnfolderBase]: For 2157/2157 co-relation queries the response was YES. [2024-06-21 17:37:31,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5895 conditions, 2109 events. 1386/2109 cut-off events. For 2157/2157 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10063 event pairs, 597 based on Foata normal form. 2/2108 useless extension candidates. Maximal degree in co-relation 5878. Up to 2064 conditions per place. [2024-06-21 17:37:31,821 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 48 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2024-06-21 17:37:31,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 61 transitions, 343 flow [2024-06-21 17:37:31,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:37:31,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:37:31,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-21 17:37:31,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-21 17:37:31,822 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 183 flow. Second operand 5 states and 90 transitions. [2024-06-21 17:37:31,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 61 transitions, 343 flow [2024-06-21 17:37:31,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 61 transitions, 316 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 17:37:31,825 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 200 flow [2024-06-21 17:37:31,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=200, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2024-06-21 17:37:31,826 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 9 predicate places. [2024-06-21 17:37:31,826 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 200 flow [2024-06-21 17:37:31,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:31,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:37:31,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:37:31,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 17:37:31,827 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 17:37:31,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:37:31,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1852053760, now seen corresponding path program 1 times [2024-06-21 17:37:31,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:37:31,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036490026] [2024-06-21 17:37:31,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:37:31,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:37:31,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:37:33,235 INFO 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 17:37:33,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:37:33,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036490026] [2024-06-21 17:37:33,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036490026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:37:33,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:37:33,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:37:33,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211152626] [2024-06-21 17:37:33,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:37:33,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:37:33,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:37:33,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:37:33,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:37:33,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:37:33,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 200 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:33,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:37:33,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:37:33,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:37:34,122 INFO L124 PetriNetUnfolderBase]: 1381/2102 cut-off events. [2024-06-21 17:37:34,122 INFO L125 PetriNetUnfolderBase]: For 3153/3153 co-relation queries the response was YES. [2024-06-21 17:37:34,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6330 conditions, 2102 events. 1381/2102 cut-off events. For 3153/3153 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9985 event pairs, 579 based on Foata normal form. 2/2101 useless extension candidates. Maximal degree in co-relation 6311. Up to 2046 conditions per place. [2024-06-21 17:37:34,133 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 53 selfloop transitions, 11 changer transitions 0/69 dead transitions. [2024-06-21 17:37:34,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 69 transitions, 392 flow [2024-06-21 17:37:34,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:37:34,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:37:34,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-21 17:37:34,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-21 17:37:34,136 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 200 flow. Second operand 6 states and 106 transitions. [2024-06-21 17:37:34,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 69 transitions, 392 flow [2024-06-21 17:37:34,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 69 transitions, 372 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 17:37:34,140 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 234 flow [2024-06-21 17:37:34,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=234, PETRI_PLACES=56, PETRI_TRANSITIONS=50} [2024-06-21 17:37:34,143 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 12 predicate places. [2024-06-21 17:37:34,143 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 234 flow [2024-06-21 17:37:34,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:34,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:37:34,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:37:34,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 17:37:34,144 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 17:37:34,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:37:34,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1585765207, now seen corresponding path program 1 times [2024-06-21 17:37:34,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:37:34,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203447856] [2024-06-21 17:37:34,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:37:34,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:37:34,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:37:35,368 INFO 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 17:37:35,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:37:35,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203447856] [2024-06-21 17:37:35,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203447856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:37:35,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:37:35,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:37:35,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114113787] [2024-06-21 17:37:35,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:37:35,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:37:35,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:37:35,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:37:35,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:37:35,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:37:35,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 234 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:35,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:37:35,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:37:35,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:37:36,159 INFO L124 PetriNetUnfolderBase]: 1407/2152 cut-off events. [2024-06-21 17:37:36,159 INFO L125 PetriNetUnfolderBase]: For 4523/4523 co-relation queries the response was YES. [2024-06-21 17:37:36,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6975 conditions, 2152 events. 1407/2152 cut-off events. For 4523/4523 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10254 event pairs, 561 based on Foata normal form. 4/2153 useless extension candidates. Maximal degree in co-relation 6955. Up to 2065 conditions per place. [2024-06-21 17:37:36,171 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 61 selfloop transitions, 11 changer transitions 0/77 dead transitions. [2024-06-21 17:37:36,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 77 transitions, 458 flow [2024-06-21 17:37:36,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:37:36,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:37:36,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-21 17:37:36,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-21 17:37:36,173 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 234 flow. Second operand 6 states and 111 transitions. [2024-06-21 17:37:36,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 77 transitions, 458 flow [2024-06-21 17:37:36,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 77 transitions, 428 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 17:37:36,176 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 260 flow [2024-06-21 17:37:36,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=260, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2024-06-21 17:37:36,177 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2024-06-21 17:37:36,177 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 260 flow [2024-06-21 17:37:36,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:36,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:37:36,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:37:36,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 17:37:36,178 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 17:37:36,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:37:36,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1579098967, now seen corresponding path program 2 times [2024-06-21 17:37:36,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:37:36,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410114032] [2024-06-21 17:37:36,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:37:36,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:37:36,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:37:37,498 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 17:37:37,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:37:37,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410114032] [2024-06-21 17:37:37,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410114032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:37:37,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:37:37,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:37:37,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713275493] [2024-06-21 17:37:37,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:37:37,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:37:37,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:37:37,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:37:37,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:37:37,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:37:37,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 260 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:37,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:37:37,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:37:37,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:37:38,256 INFO L124 PetriNetUnfolderBase]: 1415/2163 cut-off events. [2024-06-21 17:37:38,256 INFO L125 PetriNetUnfolderBase]: For 6199/6199 co-relation queries the response was YES. [2024-06-21 17:37:38,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7535 conditions, 2163 events. 1415/2163 cut-off events. For 6199/6199 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10407 event pairs, 570 based on Foata normal form. 4/2161 useless extension candidates. Maximal degree in co-relation 7514. Up to 2044 conditions per place. [2024-06-21 17:37:38,269 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 56 selfloop transitions, 16 changer transitions 0/77 dead transitions. [2024-06-21 17:37:38,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 77 transitions, 484 flow [2024-06-21 17:37:38,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:37:38,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:37:38,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-21 17:37:38,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-21 17:37:38,273 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 260 flow. Second operand 6 states and 110 transitions. [2024-06-21 17:37:38,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 77 transitions, 484 flow [2024-06-21 17:37:38,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 77 transitions, 452 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 17:37:38,297 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 300 flow [2024-06-21 17:37:38,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=300, PETRI_PLACES=60, PETRI_TRANSITIONS=56} [2024-06-21 17:37:38,298 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 16 predicate places. [2024-06-21 17:37:38,298 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 300 flow [2024-06-21 17:37:38,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:38,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:37:38,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:37:38,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 17:37:38,299 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 17:37:38,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:37:38,299 INFO L85 PathProgramCache]: Analyzing trace with hash -775626769, now seen corresponding path program 1 times [2024-06-21 17:37:38,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:37:38,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990617103] [2024-06-21 17:37:38,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:37:38,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:37:38,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:37:38,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:37:38,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:37:38,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990617103] [2024-06-21 17:37:38,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990617103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:37:38,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:37:38,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 17:37:38,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139519368] [2024-06-21 17:37:38,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:37:38,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 17:37:38,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:37:38,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 17:37:38,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 17:37:38,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2024-06-21 17:37:38,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 300 flow. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:38,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:37:38,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2024-06-21 17:37:38,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:37:38,665 INFO L124 PetriNetUnfolderBase]: 732/1318 cut-off events. [2024-06-21 17:37:38,666 INFO L125 PetriNetUnfolderBase]: For 4648/4700 co-relation queries the response was YES. [2024-06-21 17:37:38,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4640 conditions, 1318 events. 732/1318 cut-off events. For 4648/4700 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7549 event pairs, 309 based on Foata normal form. 109/1379 useless extension candidates. Maximal degree in co-relation 4619. Up to 788 conditions per place. [2024-06-21 17:37:38,682 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 36 selfloop transitions, 15 changer transitions 0/67 dead transitions. [2024-06-21 17:37:38,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 67 transitions, 479 flow [2024-06-21 17:37:38,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 17:37:38,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 17:37:38,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 78 transitions. [2024-06-21 17:37:38,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6046511627906976 [2024-06-21 17:37:38,684 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 300 flow. Second operand 3 states and 78 transitions. [2024-06-21 17:37:38,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 67 transitions, 479 flow [2024-06-21 17:37:38,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 67 transitions, 418 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 17:37:38,688 INFO L231 Difference]: Finished difference. Result has 58 places, 58 transitions, 325 flow [2024-06-21 17:37:38,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=325, PETRI_PLACES=58, PETRI_TRANSITIONS=58} [2024-06-21 17:37:38,688 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2024-06-21 17:37:38,689 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 58 transitions, 325 flow [2024-06-21 17:37:38,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:38,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:37:38,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:37:38,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 17:37:38,689 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 17:37:38,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:37:38,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1207369068, now seen corresponding path program 1 times [2024-06-21 17:37:38,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:37:38,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060721525] [2024-06-21 17:37:38,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:37:38,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:37:38,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:37:40,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:37:40,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:37:40,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060721525] [2024-06-21 17:37:40,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060721525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:37:40,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:37:40,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:37:40,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176654226] [2024-06-21 17:37:40,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:37:40,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:37:40,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:37:40,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:37:40,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:37:40,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:37:40,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 58 transitions, 325 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:40,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:37:40,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:37:40,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:37:41,216 INFO L124 PetriNetUnfolderBase]: 1533/2396 cut-off events. [2024-06-21 17:37:41,217 INFO L125 PetriNetUnfolderBase]: For 10859/10859 co-relation queries the response was YES. [2024-06-21 17:37:41,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9507 conditions, 2396 events. 1533/2396 cut-off events. For 10859/10859 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12158 event pairs, 665 based on Foata normal form. 2/2395 useless extension candidates. Maximal degree in co-relation 9486. Up to 2286 conditions per place. [2024-06-21 17:37:41,231 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 79 selfloop transitions, 18 changer transitions 0/102 dead transitions. [2024-06-21 17:37:41,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 102 transitions, 659 flow [2024-06-21 17:37:41,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:37:41,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:37:41,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 17:37:41,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-21 17:37:41,234 INFO L175 Difference]: Start difference. First operand has 58 places, 58 transitions, 325 flow. Second operand 8 states and 147 transitions. [2024-06-21 17:37:41,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 102 transitions, 659 flow [2024-06-21 17:37:41,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 102 transitions, 640 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-21 17:37:41,243 INFO L231 Difference]: Finished difference. Result has 66 places, 65 transitions, 411 flow [2024-06-21 17:37:41,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=411, PETRI_PLACES=66, PETRI_TRANSITIONS=65} [2024-06-21 17:37:41,244 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 22 predicate places. [2024-06-21 17:37:41,244 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 65 transitions, 411 flow [2024-06-21 17:37:41,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:41,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:37:41,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:37:41,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 17:37:41,245 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 17:37:41,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:37:41,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1618684948, now seen corresponding path program 2 times [2024-06-21 17:37:41,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:37:41,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604878466] [2024-06-21 17:37:41,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:37:41,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:37:41,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:37:42,972 INFO 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 17:37:42,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:37:42,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604878466] [2024-06-21 17:37:42,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604878466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:37:42,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:37:42,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:37:42,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108913111] [2024-06-21 17:37:42,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:37:42,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:37:42,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:37:42,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:37:42,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:37:42,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:37:42,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 65 transitions, 411 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:42,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:37:43,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:37:43,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:37:43,849 INFO L124 PetriNetUnfolderBase]: 1530/2391 cut-off events. [2024-06-21 17:37:43,849 INFO L125 PetriNetUnfolderBase]: For 12584/12584 co-relation queries the response was YES. [2024-06-21 17:37:43,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9777 conditions, 2391 events. 1530/2391 cut-off events. For 12584/12584 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12090 event pairs, 664 based on Foata normal form. 2/2390 useless extension candidates. Maximal degree in co-relation 9752. Up to 2270 conditions per place. [2024-06-21 17:37:43,861 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 75 selfloop transitions, 18 changer transitions 0/98 dead transitions. [2024-06-21 17:37:43,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 98 transitions, 715 flow [2024-06-21 17:37:43,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:37:43,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:37:43,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-21 17:37:43,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 17:37:43,863 INFO L175 Difference]: Start difference. First operand has 66 places, 65 transitions, 411 flow. Second operand 7 states and 129 transitions. [2024-06-21 17:37:43,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 98 transitions, 715 flow [2024-06-21 17:37:43,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 98 transitions, 666 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 17:37:43,869 INFO L231 Difference]: Finished difference. Result has 68 places, 67 transitions, 442 flow [2024-06-21 17:37:43,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=442, PETRI_PLACES=68, PETRI_TRANSITIONS=67} [2024-06-21 17:37:43,870 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 24 predicate places. [2024-06-21 17:37:43,870 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 67 transitions, 442 flow [2024-06-21 17:37:43,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:43,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:37:43,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:37:43,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 17:37:43,871 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:37:43,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:37:43,871 INFO L85 PathProgramCache]: Analyzing trace with hash -508687377, now seen corresponding path program 1 times [2024-06-21 17:37:43,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:37:43,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795011197] [2024-06-21 17:37:43,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:37:43,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:37:43,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:37:45,270 INFO 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 17:37:45,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:37:45,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795011197] [2024-06-21 17:37:45,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795011197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:37:45,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:37:45,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:37:45,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914519191] [2024-06-21 17:37:45,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:37:45,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:37:45,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:37:45,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:37:45,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:37:45,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:37:45,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 442 flow. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:45,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:37:45,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:37:45,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:37:46,010 INFO L124 PetriNetUnfolderBase]: 1527/2387 cut-off events. [2024-06-21 17:37:46,010 INFO L125 PetriNetUnfolderBase]: For 15052/15052 co-relation queries the response was YES. [2024-06-21 17:37:46,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10147 conditions, 2387 events. 1527/2387 cut-off events. For 15052/15052 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12132 event pairs, 663 based on Foata normal form. 1/2385 useless extension candidates. Maximal degree in co-relation 10121. Up to 2330 conditions per place. [2024-06-21 17:37:46,050 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 67 selfloop transitions, 8 changer transitions 0/80 dead transitions. [2024-06-21 17:37:46,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 80 transitions, 640 flow [2024-06-21 17:37:46,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:37:46,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:37:46,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 85 transitions. [2024-06-21 17:37:46,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-21 17:37:46,051 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 442 flow. Second operand 5 states and 85 transitions. [2024-06-21 17:37:46,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 80 transitions, 640 flow [2024-06-21 17:37:46,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 80 transitions, 582 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 17:37:46,059 INFO L231 Difference]: Finished difference. Result has 68 places, 70 transitions, 432 flow [2024-06-21 17:37:46,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=432, PETRI_PLACES=68, PETRI_TRANSITIONS=70} [2024-06-21 17:37:46,060 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 24 predicate places. [2024-06-21 17:37:46,060 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 70 transitions, 432 flow [2024-06-21 17:37:46,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:46,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:37:46,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:37:46,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 17:37:46,061 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 17:37:46,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:37:46,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1170671794, now seen corresponding path program 1 times [2024-06-21 17:37:46,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:37:46,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890084757] [2024-06-21 17:37:46,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:37:46,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:37:46,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:37:46,200 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 17:37:46,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:37:46,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890084757] [2024-06-21 17:37:46,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890084757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:37:46,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:37:46,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:37:46,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968345054] [2024-06-21 17:37:46,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:37:46,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:37:46,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:37:46,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:37:46,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:37:46,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-21 17:37:46,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 70 transitions, 432 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:46,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:37:46,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-21 17:37:46,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:37:46,487 INFO L124 PetriNetUnfolderBase]: 810/1507 cut-off events. [2024-06-21 17:37:46,488 INFO L125 PetriNetUnfolderBase]: For 8732/8782 co-relation queries the response was YES. [2024-06-21 17:37:46,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6108 conditions, 1507 events. 810/1507 cut-off events. For 8732/8782 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 8869 event pairs, 305 based on Foata normal form. 80/1521 useless extension candidates. Maximal degree in co-relation 6081. Up to 758 conditions per place. [2024-06-21 17:37:46,495 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 35 selfloop transitions, 23 changer transitions 0/78 dead transitions. [2024-06-21 17:37:46,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 78 transitions, 584 flow [2024-06-21 17:37:46,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:37:46,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:37:46,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 101 transitions. [2024-06-21 17:37:46,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697674418604651 [2024-06-21 17:37:46,497 INFO L175 Difference]: Start difference. First operand has 68 places, 70 transitions, 432 flow. Second operand 5 states and 101 transitions. [2024-06-21 17:37:46,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 78 transitions, 584 flow [2024-06-21 17:37:46,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 78 transitions, 558 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 17:37:46,502 INFO L231 Difference]: Finished difference. Result has 70 places, 70 transitions, 475 flow [2024-06-21 17:37:46,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=475, PETRI_PLACES=70, PETRI_TRANSITIONS=70} [2024-06-21 17:37:46,504 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 26 predicate places. [2024-06-21 17:37:46,504 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 70 transitions, 475 flow [2024-06-21 17:37:46,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:46,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:37:46,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:37:46,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 17:37:46,505 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:37:46,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:37:46,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1411196825, now seen corresponding path program 1 times [2024-06-21 17:37:46,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:37:46,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529934919] [2024-06-21 17:37:46,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:37:46,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:37:46,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:37:48,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:37:48,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:37:48,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529934919] [2024-06-21 17:37:48,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529934919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:37:48,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:37:48,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:37:48,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167393497] [2024-06-21 17:37:48,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:37:48,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:37:48,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:37:48,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:37:48,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:37:48,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:37:48,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 70 transitions, 475 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:48,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:37:48,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:37:48,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:37:49,252 INFO L124 PetriNetUnfolderBase]: 1466/2325 cut-off events. [2024-06-21 17:37:49,253 INFO L125 PetriNetUnfolderBase]: For 15991/15991 co-relation queries the response was YES. [2024-06-21 17:37:49,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10365 conditions, 2325 events. 1466/2325 cut-off events. For 15991/15991 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12008 event pairs, 603 based on Foata normal form. 6/2320 useless extension candidates. Maximal degree in co-relation 10337. Up to 2143 conditions per place. [2024-06-21 17:37:49,262 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 67 selfloop transitions, 22 changer transitions 0/94 dead transitions. [2024-06-21 17:37:49,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 94 transitions, 795 flow [2024-06-21 17:37:49,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:37:49,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:37:49,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-21 17:37:49,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41472868217054265 [2024-06-21 17:37:49,265 INFO L175 Difference]: Start difference. First operand has 70 places, 70 transitions, 475 flow. Second operand 6 states and 107 transitions. [2024-06-21 17:37:49,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 94 transitions, 795 flow [2024-06-21 17:37:49,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 94 transitions, 792 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-21 17:37:49,272 INFO L231 Difference]: Finished difference. Result has 75 places, 78 transitions, 613 flow [2024-06-21 17:37:49,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=613, PETRI_PLACES=75, PETRI_TRANSITIONS=78} [2024-06-21 17:37:49,273 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 31 predicate places. [2024-06-21 17:37:49,273 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 78 transitions, 613 flow [2024-06-21 17:37:49,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:49,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:37:49,273 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 17:37:49,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 17:37:49,273 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 17:37:49,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:37:49,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1395781575, now seen corresponding path program 1 times [2024-06-21 17:37:49,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:37:49,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101161939] [2024-06-21 17:37:49,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:37:49,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:37:49,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:37:51,218 INFO 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 17:37:51,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:37:51,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101161939] [2024-06-21 17:37:51,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101161939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:37:51,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:37:51,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:37:51,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458482819] [2024-06-21 17:37:51,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:37:51,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:37:51,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:37:51,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:37:51,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:37:51,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:37:51,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 78 transitions, 613 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:51,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:37:51,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:37:51,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:37:52,254 INFO L124 PetriNetUnfolderBase]: 1535/2458 cut-off events. [2024-06-21 17:37:52,255 INFO L125 PetriNetUnfolderBase]: For 20228/20228 co-relation queries the response was YES. [2024-06-21 17:37:52,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11859 conditions, 2458 events. 1535/2458 cut-off events. For 20228/20228 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12832 event pairs, 622 based on Foata normal form. 4/2459 useless extension candidates. Maximal degree in co-relation 11828. Up to 2243 conditions per place. [2024-06-21 17:37:52,267 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 102 selfloop transitions, 29 changer transitions 0/136 dead transitions. [2024-06-21 17:37:52,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 136 transitions, 1131 flow [2024-06-21 17:37:52,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:37:52,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:37:52,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 17:37:52,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-21 17:37:52,269 INFO L175 Difference]: Start difference. First operand has 75 places, 78 transitions, 613 flow. Second operand 9 states and 165 transitions. [2024-06-21 17:37:52,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 136 transitions, 1131 flow [2024-06-21 17:37:52,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 136 transitions, 1086 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-21 17:37:52,282 INFO L231 Difference]: Finished difference. Result has 85 places, 93 transitions, 808 flow [2024-06-21 17:37:52,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=576, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=808, PETRI_PLACES=85, PETRI_TRANSITIONS=93} [2024-06-21 17:37:52,282 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 41 predicate places. [2024-06-21 17:37:52,282 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 93 transitions, 808 flow [2024-06-21 17:37:52,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:52,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:37:52,283 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 17:37:52,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 17:37:52,283 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 17:37:52,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:37:52,283 INFO L85 PathProgramCache]: Analyzing trace with hash -2101911073, now seen corresponding path program 2 times [2024-06-21 17:37:52,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:37:52,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757024872] [2024-06-21 17:37:52,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:37:52,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:37:52,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:37:53,915 INFO 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 17:37:53,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:37:53,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757024872] [2024-06-21 17:37:53,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757024872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:37:53,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:37:53,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:37:53,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996199963] [2024-06-21 17:37:53,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:37:53,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:37:53,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:37:53,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:37:53,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:37:53,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:37:53,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 93 transitions, 808 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:53,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:37:53,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:37:53,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:37:55,015 INFO L124 PetriNetUnfolderBase]: 1543/2479 cut-off events. [2024-06-21 17:37:55,016 INFO L125 PetriNetUnfolderBase]: For 23123/23123 co-relation queries the response was YES. [2024-06-21 17:37:55,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12346 conditions, 2479 events. 1543/2479 cut-off events. For 23123/23123 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12995 event pairs, 500 based on Foata normal form. 4/2480 useless extension candidates. Maximal degree in co-relation 12310. Up to 2189 conditions per place. [2024-06-21 17:37:55,032 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 97 selfloop transitions, 29 changer transitions 0/131 dead transitions. [2024-06-21 17:37:55,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 131 transitions, 1199 flow [2024-06-21 17:37:55,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:37:55,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:37:55,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 17:37:55,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-21 17:37:55,035 INFO L175 Difference]: Start difference. First operand has 85 places, 93 transitions, 808 flow. Second operand 8 states and 145 transitions. [2024-06-21 17:37:55,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 131 transitions, 1199 flow [2024-06-21 17:37:55,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 131 transitions, 1158 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-21 17:37:55,058 INFO L231 Difference]: Finished difference. Result has 90 places, 94 transitions, 860 flow [2024-06-21 17:37:55,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=767, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=860, PETRI_PLACES=90, PETRI_TRANSITIONS=94} [2024-06-21 17:37:55,059 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 46 predicate places. [2024-06-21 17:37:55,059 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 94 transitions, 860 flow [2024-06-21 17:37:55,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:55,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:37:55,060 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 17:37:55,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 17:37:55,060 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 17:37:55,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:37:55,060 INFO L85 PathProgramCache]: Analyzing trace with hash 271363673, now seen corresponding path program 3 times [2024-06-21 17:37:55,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:37:55,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841988509] [2024-06-21 17:37:55,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:37:55,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:37:55,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:37:57,150 INFO 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 17:37:57,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:37:57,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841988509] [2024-06-21 17:37:57,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841988509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:37:57,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:37:57,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:37:57,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953078874] [2024-06-21 17:37:57,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:37:57,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:37:57,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:37:57,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:37:57,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:37:57,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:37:57,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 94 transitions, 860 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:57,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:37:57,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:37:57,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:37:58,152 INFO L124 PetriNetUnfolderBase]: 1539/2470 cut-off events. [2024-06-21 17:37:58,153 INFO L125 PetriNetUnfolderBase]: For 25966/25966 co-relation queries the response was YES. [2024-06-21 17:37:58,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12541 conditions, 2470 events. 1539/2470 cut-off events. For 25966/25966 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12924 event pairs, 624 based on Foata normal form. 4/2471 useless extension candidates. Maximal degree in co-relation 12504. Up to 2257 conditions per place. [2024-06-21 17:37:58,166 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 97 selfloop transitions, 28 changer transitions 0/130 dead transitions. [2024-06-21 17:37:58,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 130 transitions, 1222 flow [2024-06-21 17:37:58,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:37:58,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:37:58,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 17:37:58,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-21 17:37:58,168 INFO L175 Difference]: Start difference. First operand has 90 places, 94 transitions, 860 flow. Second operand 8 states and 144 transitions. [2024-06-21 17:37:58,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 130 transitions, 1222 flow [2024-06-21 17:37:58,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 130 transitions, 1146 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 17:37:58,185 INFO L231 Difference]: Finished difference. Result has 92 places, 94 transitions, 847 flow [2024-06-21 17:37:58,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=784, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=847, PETRI_PLACES=92, PETRI_TRANSITIONS=94} [2024-06-21 17:37:58,186 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 48 predicate places. [2024-06-21 17:37:58,186 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 94 transitions, 847 flow [2024-06-21 17:37:58,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:37:58,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:37:58,186 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 17:37:58,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 17:37:58,187 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 17:37:58,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:37:58,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1134676305, now seen corresponding path program 4 times [2024-06-21 17:37:58,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:37:58,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366534413] [2024-06-21 17:37:58,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:37:58,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:37:58,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:00,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:38:00,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:00,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366534413] [2024-06-21 17:38:00,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366534413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:00,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:00,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:38:00,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100613296] [2024-06-21 17:38:00,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:00,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:38:00,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:00,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:38:00,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:38:00,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:38:00,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 94 transitions, 847 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:00,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:00,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:38:00,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:38:01,146 INFO L124 PetriNetUnfolderBase]: 1547/2491 cut-off events. [2024-06-21 17:38:01,147 INFO L125 PetriNetUnfolderBase]: For 26093/26093 co-relation queries the response was YES. [2024-06-21 17:38:01,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12603 conditions, 2491 events. 1547/2491 cut-off events. For 26093/26093 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 13143 event pairs, 628 based on Foata normal form. 4/2492 useless extension candidates. Maximal degree in co-relation 12565. Up to 2331 conditions per place. [2024-06-21 17:38:01,160 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 108 selfloop transitions, 16 changer transitions 0/129 dead transitions. [2024-06-21 17:38:01,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 129 transitions, 1224 flow [2024-06-21 17:38:01,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:38:01,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:38:01,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 17:38:01,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-21 17:38:01,162 INFO L175 Difference]: Start difference. First operand has 92 places, 94 transitions, 847 flow. Second operand 8 states and 139 transitions. [2024-06-21 17:38:01,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 129 transitions, 1224 flow [2024-06-21 17:38:01,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 129 transitions, 1153 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 17:38:01,181 INFO L231 Difference]: Finished difference. Result has 95 places, 96 transitions, 847 flow [2024-06-21 17:38:01,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=776, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=847, PETRI_PLACES=95, PETRI_TRANSITIONS=96} [2024-06-21 17:38:01,182 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 51 predicate places. [2024-06-21 17:38:01,182 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 96 transitions, 847 flow [2024-06-21 17:38:01,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:01,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:01,182 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 17:38:01,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 17:38:01,182 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:38:01,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:01,183 INFO L85 PathProgramCache]: Analyzing trace with hash 183555384, now seen corresponding path program 1 times [2024-06-21 17:38:01,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:01,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805735285] [2024-06-21 17:38:01,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:01,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:01,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:02,663 INFO 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 17:38:02,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:02,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805735285] [2024-06-21 17:38:02,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805735285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:02,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:02,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:38:02,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298931706] [2024-06-21 17:38:02,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:02,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:38:02,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:02,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:38:02,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:38:02,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:38:02,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 96 transitions, 847 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:02,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:02,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:38:02,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:38:03,575 INFO L124 PetriNetUnfolderBase]: 1557/2508 cut-off events. [2024-06-21 17:38:03,576 INFO L125 PetriNetUnfolderBase]: For 28807/28807 co-relation queries the response was YES. [2024-06-21 17:38:03,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12887 conditions, 2508 events. 1557/2508 cut-off events. For 28807/28807 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 13204 event pairs, 625 based on Foata normal form. 2/2507 useless extension candidates. Maximal degree in co-relation 12847. Up to 2267 conditions per place. [2024-06-21 17:38:03,590 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 85 selfloop transitions, 33 changer transitions 0/123 dead transitions. [2024-06-21 17:38:03,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 123 transitions, 1236 flow [2024-06-21 17:38:03,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:38:03,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:38:03,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-21 17:38:03,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-21 17:38:03,591 INFO L175 Difference]: Start difference. First operand has 95 places, 96 transitions, 847 flow. Second operand 6 states and 116 transitions. [2024-06-21 17:38:03,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 123 transitions, 1236 flow [2024-06-21 17:38:03,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 123 transitions, 1190 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 17:38:03,609 INFO L231 Difference]: Finished difference. Result has 96 places, 99 transitions, 917 flow [2024-06-21 17:38:03,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=801, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=917, PETRI_PLACES=96, PETRI_TRANSITIONS=99} [2024-06-21 17:38:03,610 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 52 predicate places. [2024-06-21 17:38:03,610 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 99 transitions, 917 flow [2024-06-21 17:38:03,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:03,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:03,610 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 17:38:03,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 17:38:03,611 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 17:38:03,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:03,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1165003251, now seen corresponding path program 5 times [2024-06-21 17:38:03,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:03,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110109575] [2024-06-21 17:38:03,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:03,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:03,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:05,560 INFO 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 17:38:05,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:05,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110109575] [2024-06-21 17:38:05,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110109575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:05,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:05,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:38:05,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842967685] [2024-06-21 17:38:05,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:05,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:38:05,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:05,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:38:05,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:38:05,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:38:05,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 99 transitions, 917 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:05,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:05,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:38:05,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:38:06,512 INFO L124 PetriNetUnfolderBase]: 1553/2500 cut-off events. [2024-06-21 17:38:06,512 INFO L125 PetriNetUnfolderBase]: For 31939/31939 co-relation queries the response was YES. [2024-06-21 17:38:06,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13116 conditions, 2500 events. 1553/2500 cut-off events. For 31939/31939 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 13139 event pairs, 629 based on Foata normal form. 4/2495 useless extension candidates. Maximal degree in co-relation 13075. Up to 2304 conditions per place. [2024-06-21 17:38:06,527 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 104 selfloop transitions, 20 changer transitions 0/129 dead transitions. [2024-06-21 17:38:06,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 129 transitions, 1245 flow [2024-06-21 17:38:06,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:38:06,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:38:06,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 17:38:06,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-21 17:38:06,536 INFO L175 Difference]: Start difference. First operand has 96 places, 99 transitions, 917 flow. Second operand 8 states and 136 transitions. [2024-06-21 17:38:06,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 129 transitions, 1245 flow [2024-06-21 17:38:06,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 129 transitions, 1191 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-21 17:38:06,556 INFO L231 Difference]: Finished difference. Result has 101 places, 99 transitions, 896 flow [2024-06-21 17:38:06,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=841, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=896, PETRI_PLACES=101, PETRI_TRANSITIONS=99} [2024-06-21 17:38:06,556 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 57 predicate places. [2024-06-21 17:38:06,556 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 99 transitions, 896 flow [2024-06-21 17:38:06,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:06,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:06,557 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 17:38:06,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 17:38:06,557 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:38:06,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:06,557 INFO L85 PathProgramCache]: Analyzing trace with hash 195935544, now seen corresponding path program 2 times [2024-06-21 17:38:06,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:06,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115330327] [2024-06-21 17:38:06,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:06,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:06,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:08,182 INFO 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 17:38:08,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:08,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115330327] [2024-06-21 17:38:08,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115330327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:08,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:08,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:38:08,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71570230] [2024-06-21 17:38:08,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:08,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:38:08,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:08,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:38:08,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:38:08,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:38:08,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 99 transitions, 896 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:08,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:08,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:38:08,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:38:09,121 INFO L124 PetriNetUnfolderBase]: 1527/2459 cut-off events. [2024-06-21 17:38:09,122 INFO L125 PetriNetUnfolderBase]: For 35022/35022 co-relation queries the response was YES. [2024-06-21 17:38:09,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12989 conditions, 2459 events. 1527/2459 cut-off events. For 35022/35022 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12939 event pairs, 627 based on Foata normal form. 6/2447 useless extension candidates. Maximal degree in co-relation 12946. Up to 2240 conditions per place. [2024-06-21 17:38:09,137 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 77 selfloop transitions, 32 changer transitions 0/114 dead transitions. [2024-06-21 17:38:09,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 114 transitions, 1172 flow [2024-06-21 17:38:09,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:38:09,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:38:09,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-21 17:38:09,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-21 17:38:09,139 INFO L175 Difference]: Start difference. First operand has 101 places, 99 transitions, 896 flow. Second operand 6 states and 105 transitions. [2024-06-21 17:38:09,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 114 transitions, 1172 flow [2024-06-21 17:38:09,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 114 transitions, 1098 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 17:38:09,159 INFO L231 Difference]: Finished difference. Result has 102 places, 99 transitions, 894 flow [2024-06-21 17:38:09,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=822, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=894, PETRI_PLACES=102, PETRI_TRANSITIONS=99} [2024-06-21 17:38:09,160 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 58 predicate places. [2024-06-21 17:38:09,160 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 99 transitions, 894 flow [2024-06-21 17:38:09,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:09,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:09,160 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 17:38:09,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 17:38:09,161 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:38:09,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:09,161 INFO L85 PathProgramCache]: Analyzing trace with hash 190228568, now seen corresponding path program 1 times [2024-06-21 17:38:09,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:09,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391322561] [2024-06-21 17:38:09,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:09,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:09,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:11,100 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 17:38:11,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:11,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391322561] [2024-06-21 17:38:11,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391322561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:11,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:11,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:38:11,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349902712] [2024-06-21 17:38:11,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:11,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:38:11,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:11,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:38:11,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:38:11,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:38:11,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 99 transitions, 894 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:11,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:11,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:38:11,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:38:11,686 INFO L124 PetriNetUnfolderBase]: 1524/2464 cut-off events. [2024-06-21 17:38:11,686 INFO L125 PetriNetUnfolderBase]: For 36949/36949 co-relation queries the response was YES. [2024-06-21 17:38:11,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13162 conditions, 2464 events. 1524/2464 cut-off events. For 36949/36949 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12919 event pairs, 626 based on Foata normal form. 1/2462 useless extension candidates. Maximal degree in co-relation 13118. Up to 2359 conditions per place. [2024-06-21 17:38:11,701 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 102 selfloop transitions, 10 changer transitions 0/117 dead transitions. [2024-06-21 17:38:11,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 117 transitions, 1197 flow [2024-06-21 17:38:11,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:38:11,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:38:11,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-21 17:38:11,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-21 17:38:11,705 INFO L175 Difference]: Start difference. First operand has 102 places, 99 transitions, 894 flow. Second operand 6 states and 99 transitions. [2024-06-21 17:38:11,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 117 transitions, 1197 flow [2024-06-21 17:38:11,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 117 transitions, 1099 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 17:38:11,728 INFO L231 Difference]: Finished difference. Result has 102 places, 102 transitions, 859 flow [2024-06-21 17:38:11,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=796, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=859, PETRI_PLACES=102, PETRI_TRANSITIONS=102} [2024-06-21 17:38:11,729 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 58 predicate places. [2024-06-21 17:38:11,729 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 102 transitions, 859 flow [2024-06-21 17:38:11,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:11,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:11,729 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 17:38:11,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 17:38:11,730 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:38:11,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:11,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1418575890, now seen corresponding path program 2 times [2024-06-21 17:38:11,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:11,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309469319] [2024-06-21 17:38:11,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:11,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:11,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:13,264 INFO 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 17:38:13,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:13,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309469319] [2024-06-21 17:38:13,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309469319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:13,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:13,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:38:13,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464598560] [2024-06-21 17:38:13,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:13,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:38:13,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:13,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:38:13,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:38:13,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:38:13,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 102 transitions, 859 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:13,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:13,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:38:13,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:38:13,934 INFO L124 PetriNetUnfolderBase]: 1522/2455 cut-off events. [2024-06-21 17:38:13,934 INFO L125 PetriNetUnfolderBase]: For 39649/39649 co-relation queries the response was YES. [2024-06-21 17:38:13,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13484 conditions, 2455 events. 1522/2455 cut-off events. For 39649/39649 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12973 event pairs, 626 based on Foata normal form. 1/2453 useless extension candidates. Maximal degree in co-relation 13439. Up to 2364 conditions per place. [2024-06-21 17:38:13,952 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 100 selfloop transitions, 10 changer transitions 0/115 dead transitions. [2024-06-21 17:38:13,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 115 transitions, 1135 flow [2024-06-21 17:38:13,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:38:13,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:38:13,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-06-21 17:38:13,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3682170542635659 [2024-06-21 17:38:13,954 INFO L175 Difference]: Start difference. First operand has 102 places, 102 transitions, 859 flow. Second operand 6 states and 95 transitions. [2024-06-21 17:38:13,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 115 transitions, 1135 flow [2024-06-21 17:38:13,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 115 transitions, 1099 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 17:38:13,976 INFO L231 Difference]: Finished difference. Result has 104 places, 104 transitions, 874 flow [2024-06-21 17:38:13,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=823, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=874, PETRI_PLACES=104, PETRI_TRANSITIONS=104} [2024-06-21 17:38:13,977 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 60 predicate places. [2024-06-21 17:38:13,977 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 104 transitions, 874 flow [2024-06-21 17:38:13,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:13,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:13,977 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 17:38:13,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 17:38:13,978 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 17:38:13,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:13,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1602120194, now seen corresponding path program 1 times [2024-06-21 17:38:13,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:13,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586549731] [2024-06-21 17:38:13,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:13,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:13,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:15,859 INFO 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 17:38:15,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:15,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586549731] [2024-06-21 17:38:15,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586549731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:15,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:15,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:38:15,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248215337] [2024-06-21 17:38:15,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:15,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:38:15,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:15,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:38:15,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:38:15,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:38:15,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 104 transitions, 874 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:15,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:15,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:38:15,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:38:16,777 INFO L124 PetriNetUnfolderBase]: 1535/2475 cut-off events. [2024-06-21 17:38:16,777 INFO L125 PetriNetUnfolderBase]: For 44443/44443 co-relation queries the response was YES. [2024-06-21 17:38:16,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13999 conditions, 2475 events. 1535/2475 cut-off events. For 44443/44443 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 13153 event pairs, 614 based on Foata normal form. 1/2473 useless extension candidates. Maximal degree in co-relation 13953. Up to 2363 conditions per place. [2024-06-21 17:38:16,792 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 106 selfloop transitions, 18 changer transitions 0/129 dead transitions. [2024-06-21 17:38:16,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 129 transitions, 1295 flow [2024-06-21 17:38:16,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:38:16,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:38:16,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-21 17:38:16,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38205980066445183 [2024-06-21 17:38:16,794 INFO L175 Difference]: Start difference. First operand has 104 places, 104 transitions, 874 flow. Second operand 7 states and 115 transitions. [2024-06-21 17:38:16,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 129 transitions, 1295 flow [2024-06-21 17:38:16,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 129 transitions, 1260 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 17:38:16,816 INFO L231 Difference]: Finished difference. Result has 108 places, 112 transitions, 987 flow [2024-06-21 17:38:16,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=839, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=987, PETRI_PLACES=108, PETRI_TRANSITIONS=112} [2024-06-21 17:38:16,816 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 64 predicate places. [2024-06-21 17:38:16,816 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 112 transitions, 987 flow [2024-06-21 17:38:16,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:16,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:16,817 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 17:38:16,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 17:38:16,817 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:38:16,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:16,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1665648540, now seen corresponding path program 1 times [2024-06-21 17:38:16,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:16,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363553875] [2024-06-21 17:38:16,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:16,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:16,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:19,319 INFO 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 17:38:19,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:19,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363553875] [2024-06-21 17:38:19,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363553875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:19,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:19,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:38:19,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831449617] [2024-06-21 17:38:19,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:19,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:38:19,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:19,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:38:19,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:38:19,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:38:19,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 112 transitions, 987 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:19,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:19,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:38:19,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:38:19,990 INFO L124 PetriNetUnfolderBase]: 1581/2540 cut-off events. [2024-06-21 17:38:19,990 INFO L125 PetriNetUnfolderBase]: For 50447/50447 co-relation queries the response was YES. [2024-06-21 17:38:19,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14956 conditions, 2540 events. 1581/2540 cut-off events. For 50447/50447 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 13496 event pairs, 547 based on Foata normal form. 6/2537 useless extension candidates. Maximal degree in co-relation 14908. Up to 2316 conditions per place. [2024-06-21 17:38:20,005 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 107 selfloop transitions, 29 changer transitions 0/141 dead transitions. [2024-06-21 17:38:20,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 141 transitions, 1465 flow [2024-06-21 17:38:20,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:38:20,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:38:20,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 17:38:20,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-21 17:38:20,007 INFO L175 Difference]: Start difference. First operand has 108 places, 112 transitions, 987 flow. Second operand 7 states and 122 transitions. [2024-06-21 17:38:20,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 141 transitions, 1465 flow [2024-06-21 17:38:20,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 141 transitions, 1426 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-21 17:38:20,034 INFO L231 Difference]: Finished difference. Result has 113 places, 122 transitions, 1144 flow [2024-06-21 17:38:20,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=948, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1144, PETRI_PLACES=113, PETRI_TRANSITIONS=122} [2024-06-21 17:38:20,035 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 69 predicate places. [2024-06-21 17:38:20,035 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 122 transitions, 1144 flow [2024-06-21 17:38:20,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:20,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:20,035 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 17:38:20,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 17:38:20,035 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:38:20,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:20,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1779251900, now seen corresponding path program 2 times [2024-06-21 17:38:20,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:20,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185061784] [2024-06-21 17:38:20,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:20,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:20,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:21,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:38:21,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:21,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185061784] [2024-06-21 17:38:21,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185061784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:21,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:21,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:38:21,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084979009] [2024-06-21 17:38:21,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:21,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:38:21,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:21,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:38:21,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:38:21,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:38:21,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 122 transitions, 1144 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:21,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:21,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:38:21,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:38:22,674 INFO L124 PetriNetUnfolderBase]: 1623/2611 cut-off events. [2024-06-21 17:38:22,674 INFO L125 PetriNetUnfolderBase]: For 56884/56884 co-relation queries the response was YES. [2024-06-21 17:38:22,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16376 conditions, 2611 events. 1623/2611 cut-off events. For 56884/56884 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 13890 event pairs, 565 based on Foata normal form. 7/2600 useless extension candidates. Maximal degree in co-relation 16325. Up to 2292 conditions per place. [2024-06-21 17:38:22,691 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 117 selfloop transitions, 37 changer transitions 0/159 dead transitions. [2024-06-21 17:38:22,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 159 transitions, 1779 flow [2024-06-21 17:38:22,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:38:22,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:38:22,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 17:38:22,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019933554817276 [2024-06-21 17:38:22,694 INFO L175 Difference]: Start difference. First operand has 113 places, 122 transitions, 1144 flow. Second operand 7 states and 121 transitions. [2024-06-21 17:38:22,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 159 transitions, 1779 flow [2024-06-21 17:38:22,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 159 transitions, 1697 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-21 17:38:22,725 INFO L231 Difference]: Finished difference. Result has 118 places, 135 transitions, 1341 flow [2024-06-21 17:38:22,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1068, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1341, PETRI_PLACES=118, PETRI_TRANSITIONS=135} [2024-06-21 17:38:22,726 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 74 predicate places. [2024-06-21 17:38:22,726 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 135 transitions, 1341 flow [2024-06-21 17:38:22,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:22,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:22,726 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 17:38:22,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 17:38:22,727 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:38:22,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:22,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1779489050, now seen corresponding path program 3 times [2024-06-21 17:38:22,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:22,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802381755] [2024-06-21 17:38:22,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:22,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:22,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:24,440 INFO 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 17:38:24,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:24,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802381755] [2024-06-21 17:38:24,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802381755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:24,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:24,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:38:24,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017295967] [2024-06-21 17:38:24,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:24,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:38:24,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:24,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:38:24,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:38:24,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:38:24,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 135 transitions, 1341 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:24,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:24,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:38:24,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:38:25,400 INFO L124 PetriNetUnfolderBase]: 1637/2629 cut-off events. [2024-06-21 17:38:25,400 INFO L125 PetriNetUnfolderBase]: For 63773/63773 co-relation queries the response was YES. [2024-06-21 17:38:25,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17269 conditions, 2629 events. 1637/2629 cut-off events. For 63773/63773 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 14033 event pairs, 572 based on Foata normal form. 7/2618 useless extension candidates. Maximal degree in co-relation 17215. Up to 2398 conditions per place. [2024-06-21 17:38:25,419 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 117 selfloop transitions, 37 changer transitions 0/159 dead transitions. [2024-06-21 17:38:25,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 159 transitions, 1813 flow [2024-06-21 17:38:25,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:38:25,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:38:25,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-21 17:38:25,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3920265780730897 [2024-06-21 17:38:25,421 INFO L175 Difference]: Start difference. First operand has 118 places, 135 transitions, 1341 flow. Second operand 7 states and 118 transitions. [2024-06-21 17:38:25,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 159 transitions, 1813 flow [2024-06-21 17:38:25,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 159 transitions, 1738 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-21 17:38:25,462 INFO L231 Difference]: Finished difference. Result has 124 places, 141 transitions, 1448 flow [2024-06-21 17:38:25,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1272, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1448, PETRI_PLACES=124, PETRI_TRANSITIONS=141} [2024-06-21 17:38:25,463 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 80 predicate places. [2024-06-21 17:38:25,463 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 141 transitions, 1448 flow [2024-06-21 17:38:25,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:25,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:25,464 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 17:38:25,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 17:38:25,464 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:38:25,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:25,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1658973372, now seen corresponding path program 1 times [2024-06-21 17:38:25,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:25,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757032735] [2024-06-21 17:38:25,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:25,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:25,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:28,594 INFO 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 17:38:28,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:28,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757032735] [2024-06-21 17:38:28,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757032735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:28,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:28,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:38:28,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209147092] [2024-06-21 17:38:28,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:28,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:38:28,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:28,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:38:28,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:38:28,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:38:28,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 141 transitions, 1448 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:28,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:28,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:38:28,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:38:29,808 INFO L124 PetriNetUnfolderBase]: 1676/2684 cut-off events. [2024-06-21 17:38:29,809 INFO L125 PetriNetUnfolderBase]: For 70915/70915 co-relation queries the response was YES. [2024-06-21 17:38:29,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17874 conditions, 2684 events. 1676/2684 cut-off events. For 70915/70915 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 14270 event pairs, 551 based on Foata normal form. 14/2680 useless extension candidates. Maximal degree in co-relation 17817. Up to 2405 conditions per place. [2024-06-21 17:38:29,833 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 118 selfloop transitions, 40 changer transitions 0/163 dead transitions. [2024-06-21 17:38:29,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 163 transitions, 1895 flow [2024-06-21 17:38:29,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:38:29,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:38:29,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 17:38:29,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-21 17:38:29,836 INFO L175 Difference]: Start difference. First operand has 124 places, 141 transitions, 1448 flow. Second operand 7 states and 122 transitions. [2024-06-21 17:38:29,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 163 transitions, 1895 flow [2024-06-21 17:38:29,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 163 transitions, 1798 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-21 17:38:29,889 INFO L231 Difference]: Finished difference. Result has 127 places, 143 transitions, 1483 flow [2024-06-21 17:38:29,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1351, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1483, PETRI_PLACES=127, PETRI_TRANSITIONS=143} [2024-06-21 17:38:29,890 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 83 predicate places. [2024-06-21 17:38:29,890 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 143 transitions, 1483 flow [2024-06-21 17:38:29,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:29,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:29,891 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 17:38:29,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 17:38:29,891 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:38:29,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:29,892 INFO L85 PathProgramCache]: Analyzing trace with hash -717950535, now seen corresponding path program 1 times [2024-06-21 17:38:29,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:29,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334223100] [2024-06-21 17:38:29,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:29,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:29,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:32,060 INFO 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 17:38:32,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:32,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334223100] [2024-06-21 17:38:32,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334223100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:32,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:32,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:38:32,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525018809] [2024-06-21 17:38:32,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:32,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:38:32,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:32,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:38:32,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:38:32,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:38:32,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 143 transitions, 1483 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:32,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:32,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:38:32,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:38:33,012 INFO L124 PetriNetUnfolderBase]: 1721/2789 cut-off events. [2024-06-21 17:38:33,012 INFO L125 PetriNetUnfolderBase]: For 75260/75260 co-relation queries the response was YES. [2024-06-21 17:38:33,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18807 conditions, 2789 events. 1721/2789 cut-off events. For 75260/75260 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 15098 event pairs, 552 based on Foata normal form. 9/2795 useless extension candidates. Maximal degree in co-relation 18749. Up to 2436 conditions per place. [2024-06-21 17:38:33,030 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 134 selfloop transitions, 44 changer transitions 0/183 dead transitions. [2024-06-21 17:38:33,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 183 transitions, 2146 flow [2024-06-21 17:38:33,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:38:33,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:38:33,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-21 17:38:33,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 17:38:33,044 INFO L175 Difference]: Start difference. First operand has 127 places, 143 transitions, 1483 flow. Second operand 7 states and 133 transitions. [2024-06-21 17:38:33,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 183 transitions, 2146 flow [2024-06-21 17:38:33,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 183 transitions, 2039 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 17:38:33,100 INFO L231 Difference]: Finished difference. Result has 130 places, 153 transitions, 1660 flow [2024-06-21 17:38:33,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1378, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1660, PETRI_PLACES=130, PETRI_TRANSITIONS=153} [2024-06-21 17:38:33,104 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 86 predicate places. [2024-06-21 17:38:33,104 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 153 transitions, 1660 flow [2024-06-21 17:38:33,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:33,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:33,105 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 17:38:33,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 17:38:33,105 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:38:33,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:33,106 INFO L85 PathProgramCache]: Analyzing trace with hash 303123159, now seen corresponding path program 2 times [2024-06-21 17:38:33,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:33,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502464709] [2024-06-21 17:38:33,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:33,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:33,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:35,093 INFO 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 17:38:35,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:35,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502464709] [2024-06-21 17:38:35,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502464709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:35,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:35,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:38:35,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117164497] [2024-06-21 17:38:35,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:35,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:38:35,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:35,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:38:35,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:38:35,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:38:35,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 153 transitions, 1660 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:35,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:35,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:38:35,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:38:36,370 INFO L124 PetriNetUnfolderBase]: 1758/2851 cut-off events. [2024-06-21 17:38:36,370 INFO L125 PetriNetUnfolderBase]: For 82515/82515 co-relation queries the response was YES. [2024-06-21 17:38:36,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19818 conditions, 2851 events. 1758/2851 cut-off events. For 82515/82515 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 15529 event pairs, 545 based on Foata normal form. 3/2851 useless extension candidates. Maximal degree in co-relation 19758. Up to 2474 conditions per place. [2024-06-21 17:38:36,390 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 136 selfloop transitions, 54 changer transitions 0/195 dead transitions. [2024-06-21 17:38:36,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 195 transitions, 2342 flow [2024-06-21 17:38:36,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:38:36,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:38:36,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 17:38:36,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-21 17:38:36,392 INFO L175 Difference]: Start difference. First operand has 130 places, 153 transitions, 1660 flow. Second operand 8 states and 145 transitions. [2024-06-21 17:38:36,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 195 transitions, 2342 flow [2024-06-21 17:38:36,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 195 transitions, 2239 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-21 17:38:36,443 INFO L231 Difference]: Finished difference. Result has 136 places, 164 transitions, 1863 flow [2024-06-21 17:38:36,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1561, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1863, PETRI_PLACES=136, PETRI_TRANSITIONS=164} [2024-06-21 17:38:36,445 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 92 predicate places. [2024-06-21 17:38:36,445 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 164 transitions, 1863 flow [2024-06-21 17:38:36,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:36,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:36,446 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 17:38:36,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 17:38:36,446 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:38:36,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:36,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1886268713, now seen corresponding path program 3 times [2024-06-21 17:38:36,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:36,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907272265] [2024-06-21 17:38:36,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:36,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:36,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:38,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:38:38,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:38,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907272265] [2024-06-21 17:38:38,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907272265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:38,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:38,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:38:38,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633472509] [2024-06-21 17:38:38,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:38,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:38:38,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:38,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:38:38,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:38:38,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:38:38,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 164 transitions, 1863 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:38,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:38,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:38:38,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:38:39,104 INFO L124 PetriNetUnfolderBase]: 1756/2844 cut-off events. [2024-06-21 17:38:39,104 INFO L125 PetriNetUnfolderBase]: For 90137/90137 co-relation queries the response was YES. [2024-06-21 17:38:39,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20367 conditions, 2844 events. 1756/2844 cut-off events. For 90137/90137 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 15521 event pairs, 561 based on Foata normal form. 2/2837 useless extension candidates. Maximal degree in co-relation 20305. Up to 2637 conditions per place. [2024-06-21 17:38:39,125 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 160 selfloop transitions, 22 changer transitions 0/187 dead transitions. [2024-06-21 17:38:39,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 187 transitions, 2336 flow [2024-06-21 17:38:39,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:38:39,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:38:39,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-21 17:38:39,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-21 17:38:39,126 INFO L175 Difference]: Start difference. First operand has 136 places, 164 transitions, 1863 flow. Second operand 7 states and 119 transitions. [2024-06-21 17:38:39,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 187 transitions, 2336 flow [2024-06-21 17:38:39,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 187 transitions, 2264 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-21 17:38:39,182 INFO L231 Difference]: Finished difference. Result has 139 places, 167 transitions, 1894 flow [2024-06-21 17:38:39,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1791, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1894, PETRI_PLACES=139, PETRI_TRANSITIONS=167} [2024-06-21 17:38:39,182 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 95 predicate places. [2024-06-21 17:38:39,183 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 167 transitions, 1894 flow [2024-06-21 17:38:39,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:39,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:39,183 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 17:38:39,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 17:38:39,183 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:38:39,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:39,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1602958255, now seen corresponding path program 4 times [2024-06-21 17:38:39,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:39,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407335072] [2024-06-21 17:38:39,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:39,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:39,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:41,489 INFO 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 17:38:41,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:41,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407335072] [2024-06-21 17:38:41,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407335072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:41,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:41,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:38:41,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116318300] [2024-06-21 17:38:41,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:41,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:38:41,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:41,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:38:41,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:38:41,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:38:41,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 167 transitions, 1894 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:41,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:41,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:38:41,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:38:42,317 INFO L124 PetriNetUnfolderBase]: 1739/2833 cut-off events. [2024-06-21 17:38:42,317 INFO L125 PetriNetUnfolderBase]: For 96027/96027 co-relation queries the response was YES. [2024-06-21 17:38:42,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20351 conditions, 2833 events. 1739/2833 cut-off events. For 96027/96027 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 15677 event pairs, 554 based on Foata normal form. 23/2838 useless extension candidates. Maximal degree in co-relation 20287. Up to 2259 conditions per place. [2024-06-21 17:38:42,338 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 120 selfloop transitions, 67 changer transitions 0/192 dead transitions. [2024-06-21 17:38:42,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 192 transitions, 2479 flow [2024-06-21 17:38:42,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:38:42,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:38:42,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-21 17:38:42,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 17:38:42,340 INFO L175 Difference]: Start difference. First operand has 139 places, 167 transitions, 1894 flow. Second operand 7 states and 129 transitions. [2024-06-21 17:38:42,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 192 transitions, 2479 flow [2024-06-21 17:38:42,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 192 transitions, 2397 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 17:38:42,404 INFO L231 Difference]: Finished difference. Result has 142 places, 167 transitions, 1983 flow [2024-06-21 17:38:42,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1762, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1983, PETRI_PLACES=142, PETRI_TRANSITIONS=167} [2024-06-21 17:38:42,405 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 98 predicate places. [2024-06-21 17:38:42,405 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 167 transitions, 1983 flow [2024-06-21 17:38:42,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:42,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:42,405 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 17:38:42,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 17:38:42,406 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:38:42,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:42,406 INFO L85 PathProgramCache]: Analyzing trace with hash 504164491, now seen corresponding path program 5 times [2024-06-21 17:38:42,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:42,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150952595] [2024-06-21 17:38:42,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:42,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:42,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:44,265 INFO 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 17:38:44,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:44,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150952595] [2024-06-21 17:38:44,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150952595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:44,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:44,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:38:44,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310070758] [2024-06-21 17:38:44,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:44,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:38:44,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:44,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:38:44,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:38:44,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:38:44,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 167 transitions, 1983 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:44,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:44,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:38:44,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:38:45,134 INFO L124 PetriNetUnfolderBase]: 1733/2820 cut-off events. [2024-06-21 17:38:45,135 INFO L125 PetriNetUnfolderBase]: For 104414/104414 co-relation queries the response was YES. [2024-06-21 17:38:45,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20881 conditions, 2820 events. 1733/2820 cut-off events. For 104414/104414 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 15615 event pairs, 525 based on Foata normal form. 9/2811 useless extension candidates. Maximal degree in co-relation 20815. Up to 2375 conditions per place. [2024-06-21 17:38:45,154 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 136 selfloop transitions, 55 changer transitions 0/196 dead transitions. [2024-06-21 17:38:45,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 196 transitions, 2638 flow [2024-06-21 17:38:45,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:38:45,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:38:45,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 17:38:45,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39867109634551495 [2024-06-21 17:38:45,156 INFO L175 Difference]: Start difference. First operand has 142 places, 167 transitions, 1983 flow. Second operand 7 states and 120 transitions. [2024-06-21 17:38:45,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 196 transitions, 2638 flow [2024-06-21 17:38:45,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 196 transitions, 2508 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-21 17:38:45,224 INFO L231 Difference]: Finished difference. Result has 146 places, 172 transitions, 2091 flow [2024-06-21 17:38:45,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1853, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2091, PETRI_PLACES=146, PETRI_TRANSITIONS=172} [2024-06-21 17:38:45,225 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 102 predicate places. [2024-06-21 17:38:45,225 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 172 transitions, 2091 flow [2024-06-21 17:38:45,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:45,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:45,225 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 17:38:45,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 17:38:45,225 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 17:38:45,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:45,226 INFO L85 PathProgramCache]: Analyzing trace with hash -684444969, now seen corresponding path program 6 times [2024-06-21 17:38:45,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:45,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163683901] [2024-06-21 17:38:45,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:45,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:45,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:46,972 INFO 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 17:38:46,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:46,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163683901] [2024-06-21 17:38:46,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163683901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:46,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:46,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:38:46,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226120901] [2024-06-21 17:38:46,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:46,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:38:46,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:46,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:38:46,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:38:46,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:38:46,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 172 transitions, 2091 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:46,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:46,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:38:46,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:38:47,995 INFO L124 PetriNetUnfolderBase]: 1721/2804 cut-off events. [2024-06-21 17:38:47,995 INFO L125 PetriNetUnfolderBase]: For 110434/110434 co-relation queries the response was YES. [2024-06-21 17:38:48,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21083 conditions, 2804 events. 1721/2804 cut-off events. For 110434/110434 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 15486 event pairs, 541 based on Foata normal form. 11/2797 useless extension candidates. Maximal degree in co-relation 21015. Up to 2514 conditions per place. [2024-06-21 17:38:48,018 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 144 selfloop transitions, 44 changer transitions 0/193 dead transitions. [2024-06-21 17:38:48,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 193 transitions, 2595 flow [2024-06-21 17:38:48,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:38:48,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:38:48,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-21 17:38:48,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-21 17:38:48,020 INFO L175 Difference]: Start difference. First operand has 146 places, 172 transitions, 2091 flow. Second operand 7 states and 119 transitions. [2024-06-21 17:38:48,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 193 transitions, 2595 flow [2024-06-21 17:38:48,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 193 transitions, 2430 flow, removed 51 selfloop flow, removed 4 redundant places. [2024-06-21 17:38:48,096 INFO L231 Difference]: Finished difference. Result has 149 places, 174 transitions, 2065 flow [2024-06-21 17:38:48,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1934, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2065, PETRI_PLACES=149, PETRI_TRANSITIONS=174} [2024-06-21 17:38:48,096 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 105 predicate places. [2024-06-21 17:38:48,096 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 174 transitions, 2065 flow [2024-06-21 17:38:48,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:48,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:48,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:38:48,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 17:38:48,097 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 17:38:48,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:48,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1873879470, now seen corresponding path program 1 times [2024-06-21 17:38:48,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:48,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981547880] [2024-06-21 17:38:48,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:48,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:48,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:50,521 INFO 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 17:38:50,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:50,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981547880] [2024-06-21 17:38:50,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981547880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:50,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:50,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:38:50,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133565204] [2024-06-21 17:38:50,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:50,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:38:50,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:50,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:38:50,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:38:50,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:38:50,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 174 transitions, 2065 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:50,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:50,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:38:50,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:38:52,062 INFO L124 PetriNetUnfolderBase]: 1956/3178 cut-off events. [2024-06-21 17:38:52,062 INFO L125 PetriNetUnfolderBase]: For 130817/130817 co-relation queries the response was YES. [2024-06-21 17:38:52,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24411 conditions, 3178 events. 1956/3178 cut-off events. For 130817/130817 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 17843 event pairs, 393 based on Foata normal form. 7/3176 useless extension candidates. Maximal degree in co-relation 24342. Up to 2204 conditions per place. [2024-06-21 17:38:52,094 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 149 selfloop transitions, 96 changer transitions 0/250 dead transitions. [2024-06-21 17:38:52,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 250 transitions, 3378 flow [2024-06-21 17:38:52,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:38:52,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:38:52,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 17:38:52,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-21 17:38:52,095 INFO L175 Difference]: Start difference. First operand has 149 places, 174 transitions, 2065 flow. Second operand 8 states and 147 transitions. [2024-06-21 17:38:52,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 250 transitions, 3378 flow [2024-06-21 17:38:52,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 250 transitions, 3277 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 17:38:52,189 INFO L231 Difference]: Finished difference. Result has 154 places, 210 transitions, 2754 flow [2024-06-21 17:38:52,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1976, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2754, PETRI_PLACES=154, PETRI_TRANSITIONS=210} [2024-06-21 17:38:52,190 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 110 predicate places. [2024-06-21 17:38:52,190 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 210 transitions, 2754 flow [2024-06-21 17:38:52,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:52,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:52,190 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 17:38:52,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 17:38:52,191 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 17:38:52,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:52,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1602967183, now seen corresponding path program 1 times [2024-06-21 17:38:52,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:52,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147915706] [2024-06-21 17:38:52,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:52,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:52,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:54,736 INFO 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 17:38:54,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:54,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147915706] [2024-06-21 17:38:54,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147915706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:54,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:54,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:38:54,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881128657] [2024-06-21 17:38:54,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:54,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:38:54,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:54,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:38:54,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:38:54,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:38:54,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 210 transitions, 2754 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:54,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:54,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:38:54,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:38:55,894 INFO L124 PetriNetUnfolderBase]: 2030/3323 cut-off events. [2024-06-21 17:38:55,894 INFO L125 PetriNetUnfolderBase]: For 147249/147249 co-relation queries the response was YES. [2024-06-21 17:38:55,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27542 conditions, 3323 events. 2030/3323 cut-off events. For 147249/147249 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 19020 event pairs, 308 based on Foata normal form. 1/3321 useless extension candidates. Maximal degree in co-relation 27470. Up to 2672 conditions per place. [2024-06-21 17:38:55,929 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 164 selfloop transitions, 84 changer transitions 0/253 dead transitions. [2024-06-21 17:38:55,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 253 transitions, 3700 flow [2024-06-21 17:38:55,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:38:55,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:38:55,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 17:38:55,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-21 17:38:55,931 INFO L175 Difference]: Start difference. First operand has 154 places, 210 transitions, 2754 flow. Second operand 8 states and 136 transitions. [2024-06-21 17:38:55,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 253 transitions, 3700 flow [2024-06-21 17:38:56,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 253 transitions, 3546 flow, removed 63 selfloop flow, removed 5 redundant places. [2024-06-21 17:38:56,087 INFO L231 Difference]: Finished difference. Result has 158 places, 229 transitions, 3201 flow [2024-06-21 17:38:56,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2622, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3201, PETRI_PLACES=158, PETRI_TRANSITIONS=229} [2024-06-21 17:38:56,087 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 114 predicate places. [2024-06-21 17:38:56,088 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 229 transitions, 3201 flow [2024-06-21 17:38:56,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:56,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:38:56,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:38:56,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 17:38:56,088 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 17:38:56,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:38:56,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1873873890, now seen corresponding path program 2 times [2024-06-21 17:38:56,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:38:56,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873299704] [2024-06-21 17:38:56,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:38:56,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:38:56,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:38:58,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:38:58,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:38:58,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873299704] [2024-06-21 17:38:58,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873299704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:38:58,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:38:58,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:38:58,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723348633] [2024-06-21 17:38:58,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:38:58,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:38:58,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:38:58,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:38:58,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:38:58,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:38:58,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 229 transitions, 3201 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:38:58,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:38:58,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:38:58,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:39:00,314 INFO L124 PetriNetUnfolderBase]: 2148/3507 cut-off events. [2024-06-21 17:39:00,315 INFO L125 PetriNetUnfolderBase]: For 167624/167624 co-relation queries the response was YES. [2024-06-21 17:39:00,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30208 conditions, 3507 events. 2148/3507 cut-off events. For 167624/167624 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 20295 event pairs, 281 based on Foata normal form. 7/3505 useless extension candidates. Maximal degree in co-relation 30135. Up to 2575 conditions per place. [2024-06-21 17:39:00,346 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 164 selfloop transitions, 136 changer transitions 0/305 dead transitions. [2024-06-21 17:39:00,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 305 transitions, 4740 flow [2024-06-21 17:39:00,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:39:00,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:39:00,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 196 transitions. [2024-06-21 17:39:00,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4143763213530655 [2024-06-21 17:39:00,347 INFO L175 Difference]: Start difference. First operand has 158 places, 229 transitions, 3201 flow. Second operand 11 states and 196 transitions. [2024-06-21 17:39:00,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 305 transitions, 4740 flow [2024-06-21 17:39:00,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 305 transitions, 4655 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-21 17:39:00,499 INFO L231 Difference]: Finished difference. Result has 167 places, 268 transitions, 4108 flow [2024-06-21 17:39:00,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3130, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4108, PETRI_PLACES=167, PETRI_TRANSITIONS=268} [2024-06-21 17:39:00,499 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 123 predicate places. [2024-06-21 17:39:00,499 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 268 transitions, 4108 flow [2024-06-21 17:39:00,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:00,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:39:00,500 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 17:39:00,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 17:39:00,500 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 17:39:00,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:39:00,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1747072915, now seen corresponding path program 1 times [2024-06-21 17:39:00,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:39:00,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446340202] [2024-06-21 17:39:00,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:39:00,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:39:00,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:39:02,927 INFO 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 17:39:02,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:39:02,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446340202] [2024-06-21 17:39:02,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446340202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:39:02,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:39:02,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:39:02,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074978688] [2024-06-21 17:39:02,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:39:02,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:39:02,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:39:02,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:39:02,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:39:02,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:39:02,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 268 transitions, 4108 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:02,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:39:02,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:39:02,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:39:04,218 INFO L124 PetriNetUnfolderBase]: 2138/3468 cut-off events. [2024-06-21 17:39:04,219 INFO L125 PetriNetUnfolderBase]: For 178897/178897 co-relation queries the response was YES. [2024-06-21 17:39:04,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31623 conditions, 3468 events. 2138/3468 cut-off events. For 178897/178897 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 19820 event pairs, 548 based on Foata normal form. 4/3454 useless extension candidates. Maximal degree in co-relation 31546. Up to 3149 conditions per place. [2024-06-21 17:39:04,252 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 234 selfloop transitions, 48 changer transitions 0/287 dead transitions. [2024-06-21 17:39:04,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 287 transitions, 4801 flow [2024-06-21 17:39:04,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:39:04,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:39:04,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-21 17:39:04,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-21 17:39:04,253 INFO L175 Difference]: Start difference. First operand has 167 places, 268 transitions, 4108 flow. Second operand 7 states and 119 transitions. [2024-06-21 17:39:04,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 287 transitions, 4801 flow [2024-06-21 17:39:04,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 287 transitions, 4626 flow, removed 76 selfloop flow, removed 4 redundant places. [2024-06-21 17:39:04,459 INFO L231 Difference]: Finished difference. Result has 170 places, 268 transitions, 4045 flow [2024-06-21 17:39:04,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3935, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4045, PETRI_PLACES=170, PETRI_TRANSITIONS=268} [2024-06-21 17:39:04,460 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 126 predicate places. [2024-06-21 17:39:04,461 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 268 transitions, 4045 flow [2024-06-21 17:39:04,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:04,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:39:04,461 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 17:39:04,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 17:39:04,461 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 17:39:04,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:39:04,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1722045557, now seen corresponding path program 1 times [2024-06-21 17:39:04,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:39:04,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931195110] [2024-06-21 17:39:04,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:39:04,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:39:04,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:39:06,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:39:06,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:39:06,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931195110] [2024-06-21 17:39:06,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931195110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:39:06,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:39:06,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:39:06,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038359239] [2024-06-21 17:39:06,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:39:06,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:39:06,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:39:06,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:39:06,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:39:06,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:39:06,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 268 transitions, 4045 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:06,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:39:06,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:39:06,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:39:08,279 INFO L124 PetriNetUnfolderBase]: 2194/3566 cut-off events. [2024-06-21 17:39:08,279 INFO L125 PetriNetUnfolderBase]: For 190824/190824 co-relation queries the response was YES. [2024-06-21 17:39:08,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32659 conditions, 3566 events. 2194/3566 cut-off events. For 190824/190824 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 20489 event pairs, 327 based on Foata normal form. 3/3566 useless extension candidates. Maximal degree in co-relation 32580. Up to 2779 conditions per place. [2024-06-21 17:39:08,317 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 215 selfloop transitions, 110 changer transitions 0/330 dead transitions. [2024-06-21 17:39:08,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 330 transitions, 5196 flow [2024-06-21 17:39:08,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:39:08,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:39:08,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 189 transitions. [2024-06-21 17:39:08,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39957716701902746 [2024-06-21 17:39:08,319 INFO L175 Difference]: Start difference. First operand has 170 places, 268 transitions, 4045 flow. Second operand 11 states and 189 transitions. [2024-06-21 17:39:08,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 330 transitions, 5196 flow [2024-06-21 17:39:08,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 330 transitions, 5065 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 17:39:08,514 INFO L231 Difference]: Finished difference. Result has 177 places, 288 transitions, 4573 flow [2024-06-21 17:39:08,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3914, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4573, PETRI_PLACES=177, PETRI_TRANSITIONS=288} [2024-06-21 17:39:08,515 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 133 predicate places. [2024-06-21 17:39:08,515 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 288 transitions, 4573 flow [2024-06-21 17:39:08,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:08,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:39:08,515 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 17:39:08,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 17:39:08,516 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 17:39:08,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:39:08,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1375535635, now seen corresponding path program 2 times [2024-06-21 17:39:08,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:39:08,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268184669] [2024-06-21 17:39:08,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:39:08,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:39:08,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:39:10,817 INFO 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 17:39:10,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:39:10,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268184669] [2024-06-21 17:39:10,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268184669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:39:10,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:39:10,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:39:10,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667789202] [2024-06-21 17:39:10,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:39:10,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:39:10,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:39:10,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:39:10,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:39:10,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:39:10,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 288 transitions, 4573 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:10,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:39:10,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:39:10,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:39:12,411 INFO L124 PetriNetUnfolderBase]: 2207/3578 cut-off events. [2024-06-21 17:39:12,411 INFO L125 PetriNetUnfolderBase]: For 205768/205768 co-relation queries the response was YES. [2024-06-21 17:39:12,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34187 conditions, 3578 events. 2207/3578 cut-off events. For 205768/205768 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 20545 event pairs, 537 based on Foata normal form. 2/3571 useless extension candidates. Maximal degree in co-relation 34105. Up to 3303 conditions per place. [2024-06-21 17:39:12,447 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 281 selfloop transitions, 38 changer transitions 0/324 dead transitions. [2024-06-21 17:39:12,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 324 transitions, 5592 flow [2024-06-21 17:39:12,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:39:12,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:39:12,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-21 17:39:12,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3772609819121447 [2024-06-21 17:39:12,448 INFO L175 Difference]: Start difference. First operand has 177 places, 288 transitions, 4573 flow. Second operand 9 states and 146 transitions. [2024-06-21 17:39:12,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 324 transitions, 5592 flow [2024-06-21 17:39:12,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 324 transitions, 5495 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-21 17:39:12,657 INFO L231 Difference]: Finished difference. Result has 182 places, 301 transitions, 4843 flow [2024-06-21 17:39:12,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4479, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4843, PETRI_PLACES=182, PETRI_TRANSITIONS=301} [2024-06-21 17:39:12,657 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 138 predicate places. [2024-06-21 17:39:12,657 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 301 transitions, 4843 flow [2024-06-21 17:39:12,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:12,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:39:12,658 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 17:39:12,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 17:39:12,658 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 17:39:12,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:39:12,658 INFO L85 PathProgramCache]: Analyzing trace with hash 2039265793, now seen corresponding path program 3 times [2024-06-21 17:39:12,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:39:12,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901610390] [2024-06-21 17:39:12,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:39:12,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:39:12,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:39:14,873 INFO 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 17:39:14,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:39:14,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901610390] [2024-06-21 17:39:14,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901610390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:39:14,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:39:14,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:39:14,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863258124] [2024-06-21 17:39:14,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:39:14,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:39:14,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:39:14,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:39:14,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:39:14,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:39:14,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 301 transitions, 4843 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:14,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:39:14,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:39:14,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:39:16,250 INFO L124 PetriNetUnfolderBase]: 2215/3595 cut-off events. [2024-06-21 17:39:16,250 INFO L125 PetriNetUnfolderBase]: For 216615/216615 co-relation queries the response was YES. [2024-06-21 17:39:16,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34630 conditions, 3595 events. 2215/3595 cut-off events. For 216615/216615 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 20632 event pairs, 408 based on Foata normal form. 8/3594 useless extension candidates. Maximal degree in co-relation 34544. Up to 2373 conditions per place. [2024-06-21 17:39:16,286 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 176 selfloop transitions, 155 changer transitions 0/336 dead transitions. [2024-06-21 17:39:16,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 336 transitions, 5912 flow [2024-06-21 17:39:16,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:39:16,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:39:16,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 17:39:16,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-21 17:39:16,287 INFO L175 Difference]: Start difference. First operand has 182 places, 301 transitions, 4843 flow. Second operand 8 states and 147 transitions. [2024-06-21 17:39:16,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 336 transitions, 5912 flow [2024-06-21 17:39:16,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 336 transitions, 5783 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-21 17:39:16,559 INFO L231 Difference]: Finished difference. Result has 186 places, 306 transitions, 5135 flow [2024-06-21 17:39:16,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4714, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5135, PETRI_PLACES=186, PETRI_TRANSITIONS=306} [2024-06-21 17:39:16,560 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 142 predicate places. [2024-06-21 17:39:16,560 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 306 transitions, 5135 flow [2024-06-21 17:39:16,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:16,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:39:16,560 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 17:39:16,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 17:39:16,561 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 17:39:16,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:39:16,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1278858061, now seen corresponding path program 4 times [2024-06-21 17:39:16,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:39:16,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883643588] [2024-06-21 17:39:16,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:39:16,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:39:16,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:39:18,886 INFO 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 17:39:18,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:39:18,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883643588] [2024-06-21 17:39:18,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883643588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:39:18,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:39:18,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:39:18,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334172994] [2024-06-21 17:39:18,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:39:18,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:39:18,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:39:18,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:39:18,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:39:18,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:39:18,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 306 transitions, 5135 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:18,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:39:18,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:39:18,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:39:20,475 INFO L124 PetriNetUnfolderBase]: 2294/3719 cut-off events. [2024-06-21 17:39:20,475 INFO L125 PetriNetUnfolderBase]: For 235464/235464 co-relation queries the response was YES. [2024-06-21 17:39:20,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36778 conditions, 3719 events. 2294/3719 cut-off events. For 235464/235464 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 21332 event pairs, 408 based on Foata normal form. 6/3717 useless extension candidates. Maximal degree in co-relation 36690. Up to 2747 conditions per place. [2024-06-21 17:39:20,509 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 190 selfloop transitions, 159 changer transitions 0/354 dead transitions. [2024-06-21 17:39:20,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 354 transitions, 6422 flow [2024-06-21 17:39:20,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:39:20,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:39:20,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2024-06-21 17:39:20,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-21 17:39:20,511 INFO L175 Difference]: Start difference. First operand has 186 places, 306 transitions, 5135 flow. Second operand 11 states and 187 transitions. [2024-06-21 17:39:20,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 354 transitions, 6422 flow [2024-06-21 17:39:20,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 354 transitions, 6103 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 17:39:20,780 INFO L231 Difference]: Finished difference. Result has 195 places, 324 transitions, 5651 flow [2024-06-21 17:39:20,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4841, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5651, PETRI_PLACES=195, PETRI_TRANSITIONS=324} [2024-06-21 17:39:20,782 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 151 predicate places. [2024-06-21 17:39:20,782 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 324 transitions, 5651 flow [2024-06-21 17:39:20,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:20,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:39:20,782 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 17:39:20,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 17:39:20,782 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 17:39:20,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:39:20,783 INFO L85 PathProgramCache]: Analyzing trace with hash -840997339, now seen corresponding path program 1 times [2024-06-21 17:39:20,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:39:20,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690068094] [2024-06-21 17:39:20,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:39:20,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:39:20,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:39:23,090 INFO 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 17:39:23,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:39:23,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690068094] [2024-06-21 17:39:23,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690068094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:39:23,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:39:23,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:39:23,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332713578] [2024-06-21 17:39:23,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:39:23,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:39:23,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:39:23,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:39:23,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:39:23,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:39:23,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 324 transitions, 5651 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:23,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:39:23,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:39:23,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:39:24,586 INFO L124 PetriNetUnfolderBase]: 2346/3786 cut-off events. [2024-06-21 17:39:24,586 INFO L125 PetriNetUnfolderBase]: For 261759/261759 co-relation queries the response was YES. [2024-06-21 17:39:24,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38251 conditions, 3786 events. 2346/3786 cut-off events. For 261759/261759 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 21822 event pairs, 553 based on Foata normal form. 14/3782 useless extension candidates. Maximal degree in co-relation 38159. Up to 3435 conditions per place. [2024-06-21 17:39:24,623 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 301 selfloop transitions, 39 changer transitions 0/345 dead transitions. [2024-06-21 17:39:24,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 345 transitions, 6507 flow [2024-06-21 17:39:24,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:39:24,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:39:24,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 17:39:24,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-21 17:39:24,625 INFO L175 Difference]: Start difference. First operand has 195 places, 324 transitions, 5651 flow. Second operand 7 states and 122 transitions. [2024-06-21 17:39:24,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 345 transitions, 6507 flow [2024-06-21 17:39:24,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 345 transitions, 6373 flow, removed 59 selfloop flow, removed 3 redundant places. [2024-06-21 17:39:24,957 INFO L231 Difference]: Finished difference. Result has 199 places, 326 transitions, 5670 flow [2024-06-21 17:39:24,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5517, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5670, PETRI_PLACES=199, PETRI_TRANSITIONS=326} [2024-06-21 17:39:24,958 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 155 predicate places. [2024-06-21 17:39:24,958 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 326 transitions, 5670 flow [2024-06-21 17:39:24,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:24,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:39:24,958 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 17:39:24,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 17:39:24,959 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 17:39:24,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:39:24,959 INFO L85 PathProgramCache]: Analyzing trace with hash 700624377, now seen corresponding path program 2 times [2024-06-21 17:39:24,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:39:24,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605263681] [2024-06-21 17:39:24,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:39:24,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:39:24,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:39:27,459 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 17:39:27,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:39:27,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605263681] [2024-06-21 17:39:27,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605263681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:39:27,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:39:27,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:39:27,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590868107] [2024-06-21 17:39:27,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:39:27,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:39:27,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:39:27,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:39:27,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:39:27,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:39:27,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 326 transitions, 5670 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:27,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:39:27,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:39:27,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:39:28,806 INFO L124 PetriNetUnfolderBase]: 2407/3879 cut-off events. [2024-06-21 17:39:28,806 INFO L125 PetriNetUnfolderBase]: For 281869/281869 co-relation queries the response was YES. [2024-06-21 17:39:28,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39605 conditions, 3879 events. 2407/3879 cut-off events. For 281869/281869 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 22351 event pairs, 554 based on Foata normal form. 8/3869 useless extension candidates. Maximal degree in co-relation 39511. Up to 3375 conditions per place. [2024-06-21 17:39:28,861 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 309 selfloop transitions, 38 changer transitions 0/352 dead transitions. [2024-06-21 17:39:28,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 352 transitions, 6686 flow [2024-06-21 17:39:28,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:39:28,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:39:28,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-21 17:39:28,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40863787375415284 [2024-06-21 17:39:28,862 INFO L175 Difference]: Start difference. First operand has 199 places, 326 transitions, 5670 flow. Second operand 7 states and 123 transitions. [2024-06-21 17:39:28,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 352 transitions, 6686 flow [2024-06-21 17:39:29,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 352 transitions, 6577 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 17:39:29,198 INFO L231 Difference]: Finished difference. Result has 201 places, 328 transitions, 5715 flow [2024-06-21 17:39:29,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5561, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5715, PETRI_PLACES=201, PETRI_TRANSITIONS=328} [2024-06-21 17:39:29,200 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 157 predicate places. [2024-06-21 17:39:29,200 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 328 transitions, 5715 flow [2024-06-21 17:39:29,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:29,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:39:29,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:39:29,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 17:39:29,201 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 17:39:29,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:39:29,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1847618161, now seen corresponding path program 1 times [2024-06-21 17:39:29,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:39:29,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127073518] [2024-06-21 17:39:29,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:39:29,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:39:29,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:39:31,916 INFO 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 17:39:31,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:39:31,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127073518] [2024-06-21 17:39:31,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127073518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:39:31,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:39:31,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:39:31,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955203486] [2024-06-21 17:39:31,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:39:31,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:39:31,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:39:31,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:39:31,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:39:31,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:39:31,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 328 transitions, 5715 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:31,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:39:31,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:39:31,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:39:33,545 INFO L124 PetriNetUnfolderBase]: 2519/4063 cut-off events. [2024-06-21 17:39:33,545 INFO L125 PetriNetUnfolderBase]: For 295487/295487 co-relation queries the response was YES. [2024-06-21 17:39:33,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41327 conditions, 4063 events. 2519/4063 cut-off events. For 295487/295487 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 23553 event pairs, 439 based on Foata normal form. 6/4060 useless extension candidates. Maximal degree in co-relation 41232. Up to 2812 conditions per place. [2024-06-21 17:39:33,587 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 194 selfloop transitions, 193 changer transitions 0/392 dead transitions. [2024-06-21 17:39:33,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 392 transitions, 7253 flow [2024-06-21 17:39:33,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:39:33,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:39:33,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 17:39:33,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160206718346253 [2024-06-21 17:39:33,589 INFO L175 Difference]: Start difference. First operand has 201 places, 328 transitions, 5715 flow. Second operand 9 states and 161 transitions. [2024-06-21 17:39:33,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 392 transitions, 7253 flow [2024-06-21 17:39:33,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 392 transitions, 7202 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 17:39:33,927 INFO L231 Difference]: Finished difference. Result has 208 places, 365 transitions, 6814 flow [2024-06-21 17:39:33,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5664, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6814, PETRI_PLACES=208, PETRI_TRANSITIONS=365} [2024-06-21 17:39:33,928 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 164 predicate places. [2024-06-21 17:39:33,928 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 365 transitions, 6814 flow [2024-06-21 17:39:33,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:33,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:39:33,928 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 17:39:33,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 17:39:33,928 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 17:39:33,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:39:33,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1847622935, now seen corresponding path program 1 times [2024-06-21 17:39:33,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:39:33,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807101303] [2024-06-21 17:39:33,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:39:33,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:39:33,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:39:37,015 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 17:39:37,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:39:37,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807101303] [2024-06-21 17:39:37,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807101303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:39:37,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:39:37,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:39:37,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686067852] [2024-06-21 17:39:37,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:39:37,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:39:37,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:39:37,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:39:37,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:39:37,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:39:37,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 365 transitions, 6814 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:37,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:39:37,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:39:37,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:39:38,383 INFO L124 PetriNetUnfolderBase]: 2514/4059 cut-off events. [2024-06-21 17:39:38,383 INFO L125 PetriNetUnfolderBase]: For 315131/315131 co-relation queries the response was YES. [2024-06-21 17:39:38,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43583 conditions, 4059 events. 2514/4059 cut-off events. For 315131/315131 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 23543 event pairs, 765 based on Foata normal form. 2/4058 useless extension candidates. Maximal degree in co-relation 43485. Up to 3852 conditions per place. [2024-06-21 17:39:38,431 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 362 selfloop transitions, 18 changer transitions 0/385 dead transitions. [2024-06-21 17:39:38,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 385 transitions, 7692 flow [2024-06-21 17:39:38,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:39:38,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:39:38,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 135 transitions. [2024-06-21 17:39:38,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3488372093023256 [2024-06-21 17:39:38,452 INFO L175 Difference]: Start difference. First operand has 208 places, 365 transitions, 6814 flow. Second operand 9 states and 135 transitions. [2024-06-21 17:39:38,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 385 transitions, 7692 flow [2024-06-21 17:39:38,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 385 transitions, 7568 flow, removed 51 selfloop flow, removed 3 redundant places. [2024-06-21 17:39:38,819 INFO L231 Difference]: Finished difference. Result has 214 places, 367 transitions, 6803 flow [2024-06-21 17:39:38,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6690, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6803, PETRI_PLACES=214, PETRI_TRANSITIONS=367} [2024-06-21 17:39:38,821 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 170 predicate places. [2024-06-21 17:39:38,821 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 367 transitions, 6803 flow [2024-06-21 17:39:38,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:38,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:39:38,821 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 17:39:38,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 17:39:38,821 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 17:39:38,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:39:38,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1334437093, now seen corresponding path program 2 times [2024-06-21 17:39:38,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:39:38,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640327088] [2024-06-21 17:39:38,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:39:38,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:39:38,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:39:41,424 INFO 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 17:39:41,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:39:41,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640327088] [2024-06-21 17:39:41,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640327088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:39:41,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:39:41,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:39:41,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943529506] [2024-06-21 17:39:41,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:39:41,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:39:41,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:39:41,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:39:41,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:39:41,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:39:41,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 367 transitions, 6803 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:41,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:39:41,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:39:41,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:39:42,853 INFO L124 PetriNetUnfolderBase]: 2584/4158 cut-off events. [2024-06-21 17:39:42,854 INFO L125 PetriNetUnfolderBase]: For 334563/334563 co-relation queries the response was YES. [2024-06-21 17:39:42,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44766 conditions, 4158 events. 2584/4158 cut-off events. For 334563/334563 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 24149 event pairs, 551 based on Foata normal form. 6/4155 useless extension candidates. Maximal degree in co-relation 44666. Up to 3575 conditions per place. [2024-06-21 17:39:42,907 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 297 selfloop transitions, 104 changer transitions 0/406 dead transitions. [2024-06-21 17:39:42,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 406 transitions, 8267 flow [2024-06-21 17:39:42,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:39:42,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:39:42,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 17:39:42,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005167958656331 [2024-06-21 17:39:42,908 INFO L175 Difference]: Start difference. First operand has 214 places, 367 transitions, 6803 flow. Second operand 9 states and 155 transitions. [2024-06-21 17:39:42,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 406 transitions, 8267 flow [2024-06-21 17:39:43,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 406 transitions, 8143 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-21 17:39:43,386 INFO L231 Difference]: Finished difference. Result has 220 places, 383 transitions, 7362 flow [2024-06-21 17:39:43,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6679, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7362, PETRI_PLACES=220, PETRI_TRANSITIONS=383} [2024-06-21 17:39:43,388 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 176 predicate places. [2024-06-21 17:39:43,388 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 383 transitions, 7362 flow [2024-06-21 17:39:43,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:43,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:39:43,388 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] [2024-06-21 17:39:43,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 17:39:43,389 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 17:39:43,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:39:43,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1847438485, now seen corresponding path program 1 times [2024-06-21 17:39:43,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:39:43,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54611829] [2024-06-21 17:39:43,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:39:43,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:39:43,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:39:46,473 INFO 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 17:39:46,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:39:46,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54611829] [2024-06-21 17:39:46,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54611829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:39:46,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:39:46,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:39:46,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575670420] [2024-06-21 17:39:46,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:39:46,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:39:46,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:39:46,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:39:46,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:39:46,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:39:46,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 383 transitions, 7362 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:46,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:39:46,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:39:46,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:39:48,763 INFO L124 PetriNetUnfolderBase]: 2828/4539 cut-off events. [2024-06-21 17:39:48,763 INFO L125 PetriNetUnfolderBase]: For 380222/380222 co-relation queries the response was YES. [2024-06-21 17:39:48,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50499 conditions, 4539 events. 2828/4539 cut-off events. For 380222/380222 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 26660 event pairs, 574 based on Foata normal form. 7/4537 useless extension candidates. Maximal degree in co-relation 50396. Up to 3614 conditions per place. [2024-06-21 17:39:48,821 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 273 selfloop transitions, 190 changer transitions 0/468 dead transitions. [2024-06-21 17:39:48,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 468 transitions, 9750 flow [2024-06-21 17:39:48,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:39:48,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:39:48,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 193 transitions. [2024-06-21 17:39:48,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4080338266384778 [2024-06-21 17:39:48,824 INFO L175 Difference]: Start difference. First operand has 220 places, 383 transitions, 7362 flow. Second operand 11 states and 193 transitions. [2024-06-21 17:39:48,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 468 transitions, 9750 flow [2024-06-21 17:39:49,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 468 transitions, 9556 flow, removed 74 selfloop flow, removed 4 redundant places. [2024-06-21 17:39:49,331 INFO L231 Difference]: Finished difference. Result has 230 places, 424 transitions, 8759 flow [2024-06-21 17:39:49,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7174, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8759, PETRI_PLACES=230, PETRI_TRANSITIONS=424} [2024-06-21 17:39:49,331 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 186 predicate places. [2024-06-21 17:39:49,331 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 424 transitions, 8759 flow [2024-06-21 17:39:49,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:49,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:39:49,332 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 17:39:49,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 17:39:49,332 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 17:39:49,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:39:49,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1847445181, now seen corresponding path program 3 times [2024-06-21 17:39:49,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:39:49,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575933987] [2024-06-21 17:39:49,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:39:49,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:39:49,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:39:51,914 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 17:39:51,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:39:51,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575933987] [2024-06-21 17:39:51,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575933987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:39:51,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:39:51,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:39:51,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092659214] [2024-06-21 17:39:51,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:39:51,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:39:51,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:39:51,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:39:51,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:39:51,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:39:51,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 424 transitions, 8759 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:51,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:39:51,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:39:51,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:39:53,619 INFO L124 PetriNetUnfolderBase]: 2842/4562 cut-off events. [2024-06-21 17:39:53,619 INFO L125 PetriNetUnfolderBase]: For 395821/395821 co-relation queries the response was YES. [2024-06-21 17:39:53,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52460 conditions, 4562 events. 2842/4562 cut-off events. For 395821/395821 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 26781 event pairs, 451 based on Foata normal form. 6/4559 useless extension candidates. Maximal degree in co-relation 52352. Up to 3437 conditions per place. [2024-06-21 17:39:53,678 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 260 selfloop transitions, 193 changer transitions 0/458 dead transitions. [2024-06-21 17:39:53,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 458 transitions, 10035 flow [2024-06-21 17:39:53,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:39:53,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:39:53,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 17:39:53,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-21 17:39:53,680 INFO L175 Difference]: Start difference. First operand has 230 places, 424 transitions, 8759 flow. Second operand 9 states and 164 transitions. [2024-06-21 17:39:53,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 458 transitions, 10035 flow [2024-06-21 17:39:54,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 458 transitions, 9807 flow, removed 97 selfloop flow, removed 5 redundant places. [2024-06-21 17:39:54,178 INFO L231 Difference]: Finished difference. Result has 236 places, 431 transitions, 9213 flow [2024-06-21 17:39:54,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8531, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9213, PETRI_PLACES=236, PETRI_TRANSITIONS=431} [2024-06-21 17:39:54,179 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 192 predicate places. [2024-06-21 17:39:54,179 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 431 transitions, 9213 flow [2024-06-21 17:39:54,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:54,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:39:54,183 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 17:39:54,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 17:39:54,184 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 17:39:54,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:39:54,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1847438237, now seen corresponding path program 1 times [2024-06-21 17:39:54,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:39:54,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545857224] [2024-06-21 17:39:54,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:39:54,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:39:54,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:39:58,253 INFO 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 17:39:58,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:39:58,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545857224] [2024-06-21 17:39:58,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545857224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:39:58,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:39:58,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:39:58,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872119187] [2024-06-21 17:39:58,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:39:58,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:39:58,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:39:58,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:39:58,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:39:58,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:39:58,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 431 transitions, 9213 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:39:58,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:39:58,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:39:58,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:39:59,886 INFO L124 PetriNetUnfolderBase]: 2888/4627 cut-off events. [2024-06-21 17:39:59,886 INFO L125 PetriNetUnfolderBase]: For 441315/441315 co-relation queries the response was YES. [2024-06-21 17:39:59,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54519 conditions, 4627 events. 2888/4627 cut-off events. For 441315/441315 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 27299 event pairs, 631 based on Foata normal form. 16/4625 useless extension candidates. Maximal degree in co-relation 54407. Up to 3944 conditions per place. [2024-06-21 17:39:59,947 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 374 selfloop transitions, 82 changer transitions 0/461 dead transitions. [2024-06-21 17:39:59,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 461 transitions, 10445 flow [2024-06-21 17:39:59,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:39:59,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:39:59,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 17:39:59,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-21 17:39:59,949 INFO L175 Difference]: Start difference. First operand has 236 places, 431 transitions, 9213 flow. Second operand 8 states and 145 transitions. [2024-06-21 17:39:59,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 461 transitions, 10445 flow [2024-06-21 17:40:00,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 461 transitions, 10301 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-21 17:40:00,644 INFO L231 Difference]: Finished difference. Result has 241 places, 434 transitions, 9370 flow [2024-06-21 17:40:00,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9069, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9370, PETRI_PLACES=241, PETRI_TRANSITIONS=434} [2024-06-21 17:40:00,644 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 197 predicate places. [2024-06-21 17:40:00,644 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 434 transitions, 9370 flow [2024-06-21 17:40:00,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:40:00,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:40:00,645 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 17:40:00,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 17:40:00,645 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 17:40:00,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:40:00,646 INFO L85 PathProgramCache]: Analyzing trace with hash 564630951, now seen corresponding path program 2 times [2024-06-21 17:40:00,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:40:00,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30254746] [2024-06-21 17:40:00,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:40:00,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:40:00,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:40:03,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:40:03,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:40:03,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30254746] [2024-06-21 17:40:03,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30254746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:40:03,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:40:03,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:40:03,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533529438] [2024-06-21 17:40:03,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:40:03,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:40:03,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:40:03,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:40:03,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:40:03,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:40:03,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 434 transitions, 9370 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:40:03,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:40:03,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:40:03,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:40:05,002 INFO L124 PetriNetUnfolderBase]: 2965/4772 cut-off events. [2024-06-21 17:40:05,003 INFO L125 PetriNetUnfolderBase]: For 488475/488475 co-relation queries the response was YES. [2024-06-21 17:40:05,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56583 conditions, 4772 events. 2965/4772 cut-off events. For 488475/488475 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 28570 event pairs, 590 based on Foata normal form. 30/4784 useless extension candidates. Maximal degree in co-relation 56468. Up to 4250 conditions per place. [2024-06-21 17:40:05,202 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 410 selfloop transitions, 43 changer transitions 7/465 dead transitions. [2024-06-21 17:40:05,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 465 transitions, 10743 flow [2024-06-21 17:40:05,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:40:05,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:40:05,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 17:40:05,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-21 17:40:05,204 INFO L175 Difference]: Start difference. First operand has 241 places, 434 transitions, 9370 flow. Second operand 8 states and 139 transitions. [2024-06-21 17:40:05,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 465 transitions, 10743 flow [2024-06-21 17:40:05,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 465 transitions, 10522 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 17:40:05,831 INFO L231 Difference]: Finished difference. Result has 244 places, 438 transitions, 9393 flow [2024-06-21 17:40:05,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9149, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9393, PETRI_PLACES=244, PETRI_TRANSITIONS=438} [2024-06-21 17:40:05,832 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 200 predicate places. [2024-06-21 17:40:05,832 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 438 transitions, 9393 flow [2024-06-21 17:40:05,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:40:05,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:40:05,833 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 17:40:05,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 17:40:05,833 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 17:40:05,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:40:05,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1076957435, now seen corresponding path program 3 times [2024-06-21 17:40:05,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:40:05,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033225194] [2024-06-21 17:40:05,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:40:05,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:40:05,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:40:08,675 INFO 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 17:40:08,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:40:08,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033225194] [2024-06-21 17:40:08,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033225194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:40:08,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:40:08,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:40:08,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812092135] [2024-06-21 17:40:08,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:40:08,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:40:08,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:40:08,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:40:08,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:40:08,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:40:08,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 438 transitions, 9393 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:40:08,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:40:08,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:40:08,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:40:10,789 INFO L124 PetriNetUnfolderBase]: 3090/4994 cut-off events. [2024-06-21 17:40:10,790 INFO L125 PetriNetUnfolderBase]: For 525738/525738 co-relation queries the response was YES. [2024-06-21 17:40:10,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60076 conditions, 4994 events. 3090/4994 cut-off events. For 525738/525738 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 30359 event pairs, 679 based on Foata normal form. 40/5016 useless extension candidates. Maximal degree in co-relation 59959. Up to 4103 conditions per place. [2024-06-21 17:40:10,854 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 388 selfloop transitions, 70 changer transitions 22/485 dead transitions. [2024-06-21 17:40:10,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 485 transitions, 11264 flow [2024-06-21 17:40:10,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:40:10,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:40:10,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 17:40:10,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-21 17:40:10,856 INFO L175 Difference]: Start difference. First operand has 244 places, 438 transitions, 9393 flow. Second operand 9 states and 156 transitions. [2024-06-21 17:40:10,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 485 transitions, 11264 flow [2024-06-21 17:40:11,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 485 transitions, 11144 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-21 17:40:11,578 INFO L231 Difference]: Finished difference. Result has 250 places, 437 transitions, 9565 flow [2024-06-21 17:40:11,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9273, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9565, PETRI_PLACES=250, PETRI_TRANSITIONS=437} [2024-06-21 17:40:11,579 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 206 predicate places. [2024-06-21 17:40:11,579 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 437 transitions, 9565 flow [2024-06-21 17:40:11,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:40:11,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:40:11,580 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 17:40:11,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 17:40:11,588 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 17:40:11,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:40:11,588 INFO L85 PathProgramCache]: Analyzing trace with hash 692291081, now seen corresponding path program 4 times [2024-06-21 17:40:11,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:40:11,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492143414] [2024-06-21 17:40:11,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:40:11,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:40:11,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:40:14,017 INFO 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 17:40:14,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:40:14,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492143414] [2024-06-21 17:40:14,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492143414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:40:14,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:40:14,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:40:14,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417559992] [2024-06-21 17:40:14,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:40:14,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:40:14,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:40:14,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:40:14,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:40:14,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:40:14,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 437 transitions, 9565 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:40:14,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:40:14,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:40:14,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:40:15,981 INFO L124 PetriNetUnfolderBase]: 3110/5047 cut-off events. [2024-06-21 17:40:15,981 INFO L125 PetriNetUnfolderBase]: For 574677/574677 co-relation queries the response was YES. [2024-06-21 17:40:16,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61441 conditions, 5047 events. 3110/5047 cut-off events. For 574677/574677 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 30983 event pairs, 680 based on Foata normal form. 42/5071 useless extension candidates. Maximal degree in co-relation 61322. Up to 4470 conditions per place. [2024-06-21 17:40:16,052 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 412 selfloop transitions, 46 changer transitions 5/468 dead transitions. [2024-06-21 17:40:16,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 468 transitions, 10972 flow [2024-06-21 17:40:16,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:40:16,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:40:16,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 17:40:16,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-21 17:40:16,053 INFO L175 Difference]: Start difference. First operand has 250 places, 437 transitions, 9565 flow. Second operand 8 states and 136 transitions. [2024-06-21 17:40:16,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 468 transitions, 10972 flow [2024-06-21 17:40:16,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 468 transitions, 10754 flow, removed 54 selfloop flow, removed 6 redundant places. [2024-06-21 17:40:16,802 INFO L231 Difference]: Finished difference. Result has 252 places, 436 transitions, 9516 flow [2024-06-21 17:40:16,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9373, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9516, PETRI_PLACES=252, PETRI_TRANSITIONS=436} [2024-06-21 17:40:16,803 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 208 predicate places. [2024-06-21 17:40:16,803 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 436 transitions, 9516 flow [2024-06-21 17:40:16,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:40:16,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:40:16,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:40:16,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 17:40:16,804 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 17:40:16,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:40:16,804 INFO L85 PathProgramCache]: Analyzing trace with hash 493694528, now seen corresponding path program 1 times [2024-06-21 17:40:16,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:40:16,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427314978] [2024-06-21 17:40:16,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:40:16,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:40:16,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:40:19,370 INFO 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 17:40:19,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:40:19,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427314978] [2024-06-21 17:40:19,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427314978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:40:19,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:40:19,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:40:19,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744001222] [2024-06-21 17:40:19,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:40:19,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:40:19,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:40:19,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:40:19,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:40:19,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:40:19,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 436 transitions, 9516 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:40:19,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:40:19,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:40:19,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:40:21,605 INFO L124 PetriNetUnfolderBase]: 3206/5210 cut-off events. [2024-06-21 17:40:21,605 INFO L125 PetriNetUnfolderBase]: For 559769/559769 co-relation queries the response was YES. [2024-06-21 17:40:21,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63014 conditions, 5210 events. 3206/5210 cut-off events. For 559769/559769 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 32049 event pairs, 670 based on Foata normal form. 2/5200 useless extension candidates. Maximal degree in co-relation 62894. Up to 4681 conditions per place. [2024-06-21 17:40:21,799 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 437 selfloop transitions, 61 changer transitions 0/503 dead transitions. [2024-06-21 17:40:21,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 503 transitions, 11581 flow [2024-06-21 17:40:21,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:40:21,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:40:21,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 17:40:21,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-21 17:40:21,806 INFO L175 Difference]: Start difference. First operand has 252 places, 436 transitions, 9516 flow. Second operand 9 states and 166 transitions. [2024-06-21 17:40:21,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 503 transitions, 11581 flow [2024-06-21 17:40:22,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 503 transitions, 11411 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-21 17:40:22,585 INFO L231 Difference]: Finished difference. Result has 258 places, 463 transitions, 10297 flow [2024-06-21 17:40:22,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9382, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10297, PETRI_PLACES=258, PETRI_TRANSITIONS=463} [2024-06-21 17:40:22,586 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 214 predicate places. [2024-06-21 17:40:22,586 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 463 transitions, 10297 flow [2024-06-21 17:40:22,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:40:22,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:40:22,587 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 17:40:22,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 17:40:22,587 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 17:40:22,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:40:22,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1952476842, now seen corresponding path program 1 times [2024-06-21 17:40:22,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:40:22,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689235750] [2024-06-21 17:40:22,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:40:22,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:40:22,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:40:26,739 INFO 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 17:40:26,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:40:26,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689235750] [2024-06-21 17:40:26,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689235750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:40:26,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:40:26,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:40:26,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906950971] [2024-06-21 17:40:26,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:40:26,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:40:26,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:40:26,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:40:26,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:40:26,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:40:26,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 463 transitions, 10297 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:40:26,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:40:26,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:40:26,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:40:28,606 INFO L124 PetriNetUnfolderBase]: 3211/5223 cut-off events. [2024-06-21 17:40:28,606 INFO L125 PetriNetUnfolderBase]: For 572717/572717 co-relation queries the response was YES. [2024-06-21 17:40:28,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63670 conditions, 5223 events. 3211/5223 cut-off events. For 572717/572717 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 32141 event pairs, 688 based on Foata normal form. 1/5221 useless extension candidates. Maximal degree in co-relation 63546. Up to 4699 conditions per place. [2024-06-21 17:40:28,679 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 429 selfloop transitions, 63 changer transitions 0/497 dead transitions. [2024-06-21 17:40:28,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 497 transitions, 11644 flow [2024-06-21 17:40:28,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:40:28,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:40:28,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 17:40:28,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-21 17:40:28,680 INFO L175 Difference]: Start difference. First operand has 258 places, 463 transitions, 10297 flow. Second operand 8 states and 142 transitions. [2024-06-21 17:40:28,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 497 transitions, 11644 flow [2024-06-21 17:40:29,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 497 transitions, 11519 flow, removed 47 selfloop flow, removed 2 redundant places. [2024-06-21 17:40:29,626 INFO L231 Difference]: Finished difference. Result has 264 places, 466 transitions, 10423 flow [2024-06-21 17:40:29,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10180, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10423, PETRI_PLACES=264, PETRI_TRANSITIONS=466} [2024-06-21 17:40:29,627 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 220 predicate places. [2024-06-21 17:40:29,627 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 466 transitions, 10423 flow [2024-06-21 17:40:29,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:40:29,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:40:29,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:40:29,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 17:40:29,627 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 17:40:29,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:40:29,628 INFO L85 PathProgramCache]: Analyzing trace with hash 2048463704, now seen corresponding path program 2 times [2024-06-21 17:40:29,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:40:29,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057760436] [2024-06-21 17:40:29,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:40:29,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:40:29,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:40:32,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:40:32,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:40:32,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057760436] [2024-06-21 17:40:32,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057760436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:40:32,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:40:32,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:40:32,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752033011] [2024-06-21 17:40:32,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:40:32,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:40:32,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:40:32,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:40:32,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:40:32,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:40:32,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 466 transitions, 10423 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:40:32,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:40:32,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:40:32,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:40:34,820 INFO L124 PetriNetUnfolderBase]: 3237/5264 cut-off events. [2024-06-21 17:40:34,820 INFO L125 PetriNetUnfolderBase]: For 597609/597609 co-relation queries the response was YES. [2024-06-21 17:40:34,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64395 conditions, 5264 events. 3237/5264 cut-off events. For 597609/597609 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 32394 event pairs, 680 based on Foata normal form. 4/5265 useless extension candidates. Maximal degree in co-relation 64269. Up to 4825 conditions per place. [2024-06-21 17:40:34,894 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 434 selfloop transitions, 69 changer transitions 0/508 dead transitions. [2024-06-21 17:40:34,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 508 transitions, 11915 flow [2024-06-21 17:40:34,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:40:34,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:40:34,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 17:40:34,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-21 17:40:34,896 INFO L175 Difference]: Start difference. First operand has 264 places, 466 transitions, 10423 flow. Second operand 8 states and 147 transitions. [2024-06-21 17:40:34,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 508 transitions, 11915 flow [2024-06-21 17:40:36,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 508 transitions, 11713 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-21 17:40:36,047 INFO L231 Difference]: Finished difference. Result has 267 places, 479 transitions, 10778 flow [2024-06-21 17:40:36,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10239, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10778, PETRI_PLACES=267, PETRI_TRANSITIONS=479} [2024-06-21 17:40:36,048 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 223 predicate places. [2024-06-21 17:40:36,048 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 479 transitions, 10778 flow [2024-06-21 17:40:36,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:40:36,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:40:36,049 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 17:40:36,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 17:40:36,049 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 17:40:36,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:40:36,049 INFO L85 PathProgramCache]: Analyzing trace with hash -761131594, now seen corresponding path program 3 times [2024-06-21 17:40:36,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:40:36,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511205623] [2024-06-21 17:40:36,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:40:36,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:40:36,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:40:38,439 INFO 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 17:40:38,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:40:38,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511205623] [2024-06-21 17:40:38,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511205623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:40:38,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:40:38,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:40:38,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794627850] [2024-06-21 17:40:38,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:40:38,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:40:38,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:40:38,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:40:38,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:40:38,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:40:38,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 479 transitions, 10778 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:40:38,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:40:38,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:40:38,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:40:40,549 INFO L124 PetriNetUnfolderBase]: 3227/5245 cut-off events. [2024-06-21 17:40:40,549 INFO L125 PetriNetUnfolderBase]: For 609962/609962 co-relation queries the response was YES. [2024-06-21 17:40:40,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64549 conditions, 5245 events. 3227/5245 cut-off events. For 609962/609962 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 32231 event pairs, 685 based on Foata normal form. 4/5246 useless extension candidates. Maximal degree in co-relation 64421. Up to 4811 conditions per place. [2024-06-21 17:40:40,621 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 431 selfloop transitions, 67 changer transitions 0/503 dead transitions. [2024-06-21 17:40:40,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 503 transitions, 11956 flow [2024-06-21 17:40:40,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:40:40,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:40:40,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 17:40:40,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-21 17:40:40,623 INFO L175 Difference]: Start difference. First operand has 267 places, 479 transitions, 10778 flow. Second operand 8 states and 138 transitions. [2024-06-21 17:40:40,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 503 transitions, 11956 flow [2024-06-21 17:40:41,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 503 transitions, 11791 flow, removed 50 selfloop flow, removed 3 redundant places. [2024-06-21 17:40:41,630 INFO L231 Difference]: Finished difference. Result has 273 places, 482 transitions, 10885 flow [2024-06-21 17:40:41,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10615, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10885, PETRI_PLACES=273, PETRI_TRANSITIONS=482} [2024-06-21 17:40:41,632 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 229 predicate places. [2024-06-21 17:40:41,632 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 482 transitions, 10885 flow [2024-06-21 17:40:41,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:40:41,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:40:41,632 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 17:40:41,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 17:40:41,636 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 17:40:41,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:40:41,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1344239274, now seen corresponding path program 1 times [2024-06-21 17:40:41,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:40:41,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675916683] [2024-06-21 17:40:41,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:40:41,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:40:41,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:40:44,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:40:44,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:40:44,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675916683] [2024-06-21 17:40:44,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675916683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:40:44,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:40:44,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:40:44,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043597424] [2024-06-21 17:40:44,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:40:44,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:40:44,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:40:44,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:40:44,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:40:44,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:40:44,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 482 transitions, 10885 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:40:44,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:40:44,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:40:44,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:40:46,449 INFO L124 PetriNetUnfolderBase]: 3422/5540 cut-off events. [2024-06-21 17:40:46,449 INFO L125 PetriNetUnfolderBase]: For 678889/678889 co-relation queries the response was YES. [2024-06-21 17:40:46,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69093 conditions, 5540 events. 3422/5540 cut-off events. For 678889/678889 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 34194 event pairs, 538 based on Foata normal form. 9/5546 useless extension candidates. Maximal degree in co-relation 68963. Up to 3987 conditions per place. [2024-06-21 17:40:46,520 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 337 selfloop transitions, 212 changer transitions 0/554 dead transitions. [2024-06-21 17:40:46,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 554 transitions, 13224 flow [2024-06-21 17:40:46,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:40:46,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:40:46,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-21 17:40:46,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-21 17:40:46,522 INFO L175 Difference]: Start difference. First operand has 273 places, 482 transitions, 10885 flow. Second operand 9 states and 175 transitions. [2024-06-21 17:40:46,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 554 transitions, 13224 flow [2024-06-21 17:40:47,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 554 transitions, 13016 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-21 17:40:47,550 INFO L231 Difference]: Finished difference. Result has 278 places, 514 transitions, 12165 flow [2024-06-21 17:40:47,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10677, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12165, PETRI_PLACES=278, PETRI_TRANSITIONS=514} [2024-06-21 17:40:47,551 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 234 predicate places. [2024-06-21 17:40:47,551 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 514 transitions, 12165 flow [2024-06-21 17:40:47,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:40:47,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:40:47,551 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 17:40:47,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 17:40:47,552 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 17:40:47,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:40:47,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1849820208, now seen corresponding path program 2 times [2024-06-21 17:40:47,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:40:47,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359589800] [2024-06-21 17:40:47,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:40:47,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:40:47,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:40:51,074 INFO 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 17:40:51,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:40:51,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359589800] [2024-06-21 17:40:51,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359589800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:40:51,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:40:51,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:40:51,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502460945] [2024-06-21 17:40:51,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:40:51,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:40:51,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:40:51,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:40:51,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:40:51,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:40:51,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 514 transitions, 12165 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:40:51,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:40:51,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:40:51,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:40:53,336 INFO L124 PetriNetUnfolderBase]: 3427/5554 cut-off events. [2024-06-21 17:40:53,336 INFO L125 PetriNetUnfolderBase]: For 708917/708917 co-relation queries the response was YES. [2024-06-21 17:40:53,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71739 conditions, 5554 events. 3427/5554 cut-off events. For 708917/708917 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 34329 event pairs, 762 based on Foata normal form. 1/5536 useless extension candidates. Maximal degree in co-relation 71607. Up to 4925 conditions per place. [2024-06-21 17:40:53,422 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 466 selfloop transitions, 72 changer transitions 0/543 dead transitions. [2024-06-21 17:40:53,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 543 transitions, 13546 flow [2024-06-21 17:40:53,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:40:53,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:40:53,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 17:40:53,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-21 17:40:53,423 INFO L175 Difference]: Start difference. First operand has 278 places, 514 transitions, 12165 flow. Second operand 8 states and 139 transitions. [2024-06-21 17:40:53,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 543 transitions, 13546 flow [2024-06-21 17:40:54,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 543 transitions, 13298 flow, removed 93 selfloop flow, removed 3 redundant places. [2024-06-21 17:40:54,648 INFO L231 Difference]: Finished difference. Result has 283 places, 517 transitions, 12187 flow [2024-06-21 17:40:54,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11917, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12187, PETRI_PLACES=283, PETRI_TRANSITIONS=517} [2024-06-21 17:40:54,663 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 239 predicate places. [2024-06-21 17:40:54,663 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 517 transitions, 12187 flow [2024-06-21 17:40:54,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:40:54,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:40:54,664 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 17:40:54,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 17:40:54,664 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 17:40:54,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:40:54,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1450322898, now seen corresponding path program 3 times [2024-06-21 17:40:54,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:40:54,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300683277] [2024-06-21 17:40:54,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:40:54,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:40:54,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:40:57,926 INFO 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 17:40:57,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:40:57,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300683277] [2024-06-21 17:40:57,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300683277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:40:57,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:40:57,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:40:57,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781990594] [2024-06-21 17:40:57,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:40:57,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:40:57,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:40:57,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:40:57,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:40:57,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:40:57,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 517 transitions, 12187 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:40:57,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:40:57,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:40:57,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:41:00,033 INFO L124 PetriNetUnfolderBase]: 3418/5555 cut-off events. [2024-06-21 17:41:00,033 INFO L125 PetriNetUnfolderBase]: For 721076/721076 co-relation queries the response was YES. [2024-06-21 17:41:00,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71512 conditions, 5555 events. 3418/5555 cut-off events. For 721076/721076 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 34414 event pairs, 727 based on Foata normal form. 3/5549 useless extension candidates. Maximal degree in co-relation 71378. Up to 5108 conditions per place. [2024-06-21 17:41:00,112 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 484 selfloop transitions, 50 changer transitions 0/539 dead transitions. [2024-06-21 17:41:00,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 539 transitions, 13506 flow [2024-06-21 17:41:00,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:41:00,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:41:00,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 17:41:00,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-21 17:41:00,113 INFO L175 Difference]: Start difference. First operand has 283 places, 517 transitions, 12187 flow. Second operand 8 states and 135 transitions. [2024-06-21 17:41:00,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 539 transitions, 13506 flow [2024-06-21 17:41:01,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 539 transitions, 13315 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-21 17:41:01,282 INFO L231 Difference]: Finished difference. Result has 288 places, 520 transitions, 12206 flow [2024-06-21 17:41:01,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11996, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12206, PETRI_PLACES=288, PETRI_TRANSITIONS=520} [2024-06-21 17:41:01,282 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 244 predicate places. [2024-06-21 17:41:01,282 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 520 transitions, 12206 flow [2024-06-21 17:41:01,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:01,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:41:01,283 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, 1] [2024-06-21 17:41:01,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 17:41:01,283 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 17:41:01,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:41:01,283 INFO L85 PathProgramCache]: Analyzing trace with hash -462747826, now seen corresponding path program 2 times [2024-06-21 17:41:01,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:41:01,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108113938] [2024-06-21 17:41:01,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:41:01,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:41:01,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:41:04,036 INFO 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 17:41:04,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:41:04,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108113938] [2024-06-21 17:41:04,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108113938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:41:04,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:41:04,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:41:04,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651353909] [2024-06-21 17:41:04,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:41:04,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:41:04,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:41:04,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:41:04,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:41:04,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:41:04,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 520 transitions, 12206 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:04,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:41:04,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:41:04,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:41:06,344 INFO L124 PetriNetUnfolderBase]: 3419/5554 cut-off events. [2024-06-21 17:41:06,344 INFO L125 PetriNetUnfolderBase]: For 737986/737986 co-relation queries the response was YES. [2024-06-21 17:41:06,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71816 conditions, 5554 events. 3419/5554 cut-off events. For 737986/737986 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 34415 event pairs, 728 based on Foata normal form. 4/5549 useless extension candidates. Maximal degree in co-relation 71680. Up to 5116 conditions per place. [2024-06-21 17:41:06,422 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 505 selfloop transitions, 47 changer transitions 0/557 dead transitions. [2024-06-21 17:41:06,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 557 transitions, 13609 flow [2024-06-21 17:41:06,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:41:06,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:41:06,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 17:41:06,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40568475452196384 [2024-06-21 17:41:06,423 INFO L175 Difference]: Start difference. First operand has 288 places, 520 transitions, 12206 flow. Second operand 9 states and 157 transitions. [2024-06-21 17:41:06,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 557 transitions, 13609 flow [2024-06-21 17:41:07,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 557 transitions, 13447 flow, removed 52 selfloop flow, removed 4 redundant places. [2024-06-21 17:41:07,598 INFO L231 Difference]: Finished difference. Result has 295 places, 530 transitions, 12408 flow [2024-06-21 17:41:07,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12044, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12408, PETRI_PLACES=295, PETRI_TRANSITIONS=530} [2024-06-21 17:41:07,599 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 251 predicate places. [2024-06-21 17:41:07,599 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 530 transitions, 12408 flow [2024-06-21 17:41:07,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:07,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:41:07,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:41:07,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 17:41:07,600 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 17:41:07,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:41:07,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1450315954, now seen corresponding path program 3 times [2024-06-21 17:41:07,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:41:07,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810701395] [2024-06-21 17:41:07,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:41:07,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:41:07,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:41:10,114 INFO 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 17:41:10,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:41:10,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810701395] [2024-06-21 17:41:10,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810701395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:41:10,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:41:10,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:41:10,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538201250] [2024-06-21 17:41:10,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:41:10,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:41:10,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:41:10,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:41:10,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:41:10,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:41:10,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 530 transitions, 12408 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:10,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:41:10,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:41:10,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:41:12,564 INFO L124 PetriNetUnfolderBase]: 3434/5571 cut-off events. [2024-06-21 17:41:12,565 INFO L125 PetriNetUnfolderBase]: For 773621/773621 co-relation queries the response was YES. [2024-06-21 17:41:12,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72817 conditions, 5571 events. 3434/5571 cut-off events. For 773621/773621 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 34431 event pairs, 556 based on Foata normal form. 3/5565 useless extension candidates. Maximal degree in co-relation 72677. Up to 4215 conditions per place. [2024-06-21 17:41:12,660 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 340 selfloop transitions, 218 changer transitions 0/563 dead transitions. [2024-06-21 17:41:12,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 563 transitions, 13943 flow [2024-06-21 17:41:12,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:41:12,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:41:12,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 17:41:12,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160206718346253 [2024-06-21 17:41:12,662 INFO L175 Difference]: Start difference. First operand has 295 places, 530 transitions, 12408 flow. Second operand 9 states and 161 transitions. [2024-06-21 17:41:12,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 563 transitions, 13943 flow [2024-06-21 17:41:14,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 563 transitions, 13586 flow, removed 77 selfloop flow, removed 7 redundant places. [2024-06-21 17:41:14,147 INFO L231 Difference]: Finished difference. Result has 299 places, 536 transitions, 12780 flow [2024-06-21 17:41:14,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12051, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12780, PETRI_PLACES=299, PETRI_TRANSITIONS=536} [2024-06-21 17:41:14,148 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 255 predicate places. [2024-06-21 17:41:14,148 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 536 transitions, 12780 flow [2024-06-21 17:41:14,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:14,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:41:14,149 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 17:41:14,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 17:41:14,149 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 17:41:14,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:41:14,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1207267944, now seen corresponding path program 4 times [2024-06-21 17:41:14,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:41:14,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488399411] [2024-06-21 17:41:14,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:41:14,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:41:14,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:41:17,012 INFO 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 17:41:17,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:41:17,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488399411] [2024-06-21 17:41:17,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488399411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:41:17,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:41:17,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:41:17,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651454937] [2024-06-21 17:41:17,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:41:17,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:41:17,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:41:17,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:41:17,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:41:17,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:41:17,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 536 transitions, 12780 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:17,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:41:17,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:41:17,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:41:19,443 INFO L124 PetriNetUnfolderBase]: 3449/5590 cut-off events. [2024-06-21 17:41:19,443 INFO L125 PetriNetUnfolderBase]: For 814791/814791 co-relation queries the response was YES. [2024-06-21 17:41:19,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74818 conditions, 5590 events. 3449/5590 cut-off events. For 814791/814791 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 34561 event pairs, 541 based on Foata normal form. 3/5584 useless extension candidates. Maximal degree in co-relation 74674. Up to 3997 conditions per place. [2024-06-21 17:41:19,532 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 299 selfloop transitions, 262 changer transitions 0/566 dead transitions. [2024-06-21 17:41:19,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 566 transitions, 14225 flow [2024-06-21 17:41:19,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:41:19,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:41:19,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 17:41:19,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-21 17:41:19,534 INFO L175 Difference]: Start difference. First operand has 299 places, 536 transitions, 12780 flow. Second operand 9 states and 159 transitions. [2024-06-21 17:41:19,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 566 transitions, 14225 flow [2024-06-21 17:41:20,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 566 transitions, 14127 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-21 17:41:20,779 INFO L231 Difference]: Finished difference. Result has 304 places, 540 transitions, 13303 flow [2024-06-21 17:41:20,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12684, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=258, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13303, PETRI_PLACES=304, PETRI_TRANSITIONS=540} [2024-06-21 17:41:20,779 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 260 predicate places. [2024-06-21 17:41:20,779 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 540 transitions, 13303 flow [2024-06-21 17:41:20,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:20,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:41:20,780 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 17:41:20,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 17:41:20,780 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 17:41:20,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:41:20,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1207259574, now seen corresponding path program 5 times [2024-06-21 17:41:20,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:41:20,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652391446] [2024-06-21 17:41:20,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:41:20,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:41:20,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:41:23,229 INFO 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 17:41:23,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:41:23,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652391446] [2024-06-21 17:41:23,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652391446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:41:23,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:41:23,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:41:23,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207522147] [2024-06-21 17:41:23,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:41:23,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:41:23,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:41:23,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:41:23,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:41:23,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:41:23,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 540 transitions, 13303 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:23,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:41:23,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:41:23,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:41:25,625 INFO L124 PetriNetUnfolderBase]: 3444/5582 cut-off events. [2024-06-21 17:41:25,625 INFO L125 PetriNetUnfolderBase]: For 831960/831960 co-relation queries the response was YES. [2024-06-21 17:41:25,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75972 conditions, 5582 events. 3444/5582 cut-off events. For 831960/831960 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 34554 event pairs, 710 based on Foata normal form. 3/5576 useless extension candidates. Maximal degree in co-relation 75827. Up to 4685 conditions per place. [2024-06-21 17:41:25,702 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 397 selfloop transitions, 173 changer transitions 0/575 dead transitions. [2024-06-21 17:41:25,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 575 transitions, 14772 flow [2024-06-21 17:41:25,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:41:25,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:41:25,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-21 17:41:25,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-21 17:41:25,703 INFO L175 Difference]: Start difference. First operand has 304 places, 540 transitions, 13303 flow. Second operand 10 states and 175 transitions. [2024-06-21 17:41:25,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 575 transitions, 14772 flow [2024-06-21 17:41:26,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 575 transitions, 14447 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-21 17:41:26,772 INFO L231 Difference]: Finished difference. Result has 307 places, 543 transitions, 13395 flow [2024-06-21 17:41:26,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12980, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13395, PETRI_PLACES=307, PETRI_TRANSITIONS=543} [2024-06-21 17:41:26,773 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 263 predicate places. [2024-06-21 17:41:26,773 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 543 transitions, 13395 flow [2024-06-21 17:41:26,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:26,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:41:26,773 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 17:41:26,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 17:41:26,774 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 17:41:26,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:41:26,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1692271528, now seen corresponding path program 4 times [2024-06-21 17:41:26,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:41:26,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311387114] [2024-06-21 17:41:26,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:41:26,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:41:26,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:41:30,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:41:30,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:41:30,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311387114] [2024-06-21 17:41:30,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311387114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:41:30,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:41:30,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:41:30,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093991751] [2024-06-21 17:41:30,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:41:30,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:41:30,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:41:30,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:41:30,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:41:30,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:41:30,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 543 transitions, 13395 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:30,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:41:30,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:41:30,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:41:32,571 INFO L124 PetriNetUnfolderBase]: 3509/5686 cut-off events. [2024-06-21 17:41:32,572 INFO L125 PetriNetUnfolderBase]: For 838382/838382 co-relation queries the response was YES. [2024-06-21 17:41:32,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76933 conditions, 5686 events. 3509/5686 cut-off events. For 838382/838382 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 35238 event pairs, 704 based on Foata normal form. 2/5685 useless extension candidates. Maximal degree in co-relation 76789. Up to 5142 conditions per place. [2024-06-21 17:41:32,655 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 509 selfloop transitions, 93 changer transitions 0/607 dead transitions. [2024-06-21 17:41:32,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 607 transitions, 15424 flow [2024-06-21 17:41:32,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:41:32,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:41:32,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 17:41:32,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 17:41:32,660 INFO L175 Difference]: Start difference. First operand has 307 places, 543 transitions, 13395 flow. Second operand 9 states and 171 transitions. [2024-06-21 17:41:32,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 607 transitions, 15424 flow [2024-06-21 17:41:33,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 607 transitions, 15175 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-21 17:41:33,994 INFO L231 Difference]: Finished difference. Result has 312 places, 568 transitions, 14100 flow [2024-06-21 17:41:33,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13146, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14100, PETRI_PLACES=312, PETRI_TRANSITIONS=568} [2024-06-21 17:41:33,995 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 268 predicate places. [2024-06-21 17:41:33,995 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 568 transitions, 14100 flow [2024-06-21 17:41:33,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:33,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:41:33,995 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 17:41:33,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 17:41:33,995 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 17:41:33,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:41:33,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1318977624, now seen corresponding path program 5 times [2024-06-21 17:41:33,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:41:33,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473247895] [2024-06-21 17:41:33,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:41:33,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:41:34,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:41:36,178 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 17:41:36,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:41:36,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473247895] [2024-06-21 17:41:36,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473247895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:41:36,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:41:36,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:41:36,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428803842] [2024-06-21 17:41:36,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:41:36,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:41:36,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:41:36,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:41:36,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:41:36,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:41:36,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 568 transitions, 14100 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:36,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:41:36,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:41:36,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:41:38,694 INFO L124 PetriNetUnfolderBase]: 3604/5840 cut-off events. [2024-06-21 17:41:38,694 INFO L125 PetriNetUnfolderBase]: For 880226/880226 co-relation queries the response was YES. [2024-06-21 17:41:38,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78723 conditions, 5840 events. 3604/5840 cut-off events. For 880226/880226 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 36232 event pairs, 729 based on Foata normal form. 2/5839 useless extension candidates. Maximal degree in co-relation 78576. Up to 5276 conditions per place. [2024-06-21 17:41:38,774 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 523 selfloop transitions, 101 changer transitions 0/629 dead transitions. [2024-06-21 17:41:38,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 629 transitions, 16112 flow [2024-06-21 17:41:38,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:41:38,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:41:38,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 17:41:38,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-21 17:41:38,776 INFO L175 Difference]: Start difference. First operand has 312 places, 568 transitions, 14100 flow. Second operand 9 states and 173 transitions. [2024-06-21 17:41:38,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 629 transitions, 16112 flow [2024-06-21 17:41:40,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 629 transitions, 15905 flow, removed 58 selfloop flow, removed 3 redundant places. [2024-06-21 17:41:40,180 INFO L231 Difference]: Finished difference. Result has 319 places, 587 transitions, 14772 flow [2024-06-21 17:41:40,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13958, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14772, PETRI_PLACES=319, PETRI_TRANSITIONS=587} [2024-06-21 17:41:40,181 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 275 predicate places. [2024-06-21 17:41:40,181 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 587 transitions, 14772 flow [2024-06-21 17:41:40,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:40,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:41:40,181 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 17:41:40,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 17:41:40,181 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 17:41:40,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:41:40,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1527553240, now seen corresponding path program 6 times [2024-06-21 17:41:40,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:41:40,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926438586] [2024-06-21 17:41:40,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:41:40,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:41:40,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:41:42,556 INFO 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 17:41:42,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:41:42,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926438586] [2024-06-21 17:41:42,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926438586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:41:42,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:41:42,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:41:42,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628048190] [2024-06-21 17:41:42,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:41:42,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:41:42,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:41:42,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:41:42,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:41:42,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:41:42,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 587 transitions, 14772 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:42,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:41:42,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:41:42,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:41:44,956 INFO L124 PetriNetUnfolderBase]: 3665/5947 cut-off events. [2024-06-21 17:41:44,956 INFO L125 PetriNetUnfolderBase]: For 911908/911908 co-relation queries the response was YES. [2024-06-21 17:41:45,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79982 conditions, 5947 events. 3665/5947 cut-off events. For 911908/911908 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 36903 event pairs, 571 based on Foata normal form. 2/5946 useless extension candidates. Maximal degree in co-relation 79833. Up to 5097 conditions per place. [2024-06-21 17:41:45,053 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 506 selfloop transitions, 136 changer transitions 0/647 dead transitions. [2024-06-21 17:41:45,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 647 transitions, 16775 flow [2024-06-21 17:41:45,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:41:45,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:41:45,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-21 17:41:45,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-21 17:41:45,054 INFO L175 Difference]: Start difference. First operand has 319 places, 587 transitions, 14772 flow. Second operand 9 states and 174 transitions. [2024-06-21 17:41:45,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 647 transitions, 16775 flow [2024-06-21 17:41:47,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 647 transitions, 16567 flow, removed 58 selfloop flow, removed 3 redundant places. [2024-06-21 17:41:47,037 INFO L231 Difference]: Finished difference. Result has 327 places, 602 transitions, 15432 flow [2024-06-21 17:41:47,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14625, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15432, PETRI_PLACES=327, PETRI_TRANSITIONS=602} [2024-06-21 17:41:47,038 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 283 predicate places. [2024-06-21 17:41:47,038 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 602 transitions, 15432 flow [2024-06-21 17:41:47,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:47,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:41:47,038 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 17:41:47,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 17:41:47,039 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 17:41:47,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:41:47,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1206956549, now seen corresponding path program 1 times [2024-06-21 17:41:47,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:41:47,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633320006] [2024-06-21 17:41:47,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:41:47,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:41:47,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:41:50,045 INFO 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 17:41:50,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:41:50,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633320006] [2024-06-21 17:41:50,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633320006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:41:50,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:41:50,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:41:50,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574519345] [2024-06-21 17:41:50,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:41:50,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:41:50,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:41:50,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:41:50,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:41:50,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:41:50,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 602 transitions, 15432 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:50,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:41:50,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:41:50,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:41:52,946 INFO L124 PetriNetUnfolderBase]: 3841/6222 cut-off events. [2024-06-21 17:41:52,946 INFO L125 PetriNetUnfolderBase]: For 1041628/1041628 co-relation queries the response was YES. [2024-06-21 17:41:53,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82886 conditions, 6222 events. 3841/6222 cut-off events. For 1041628/1041628 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 38848 event pairs, 663 based on Foata normal form. 54/6267 useless extension candidates. Maximal degree in co-relation 82734. Up to 4104 conditions per place. [2024-06-21 17:41:53,047 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 317 selfloop transitions, 314 changer transitions 3/639 dead transitions. [2024-06-21 17:41:53,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 639 transitions, 17136 flow [2024-06-21 17:41:53,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:41:53,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:41:53,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-21 17:41:53,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-21 17:41:53,049 INFO L175 Difference]: Start difference. First operand has 327 places, 602 transitions, 15432 flow. Second operand 10 states and 180 transitions. [2024-06-21 17:41:53,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 639 transitions, 17136 flow [2024-06-21 17:41:54,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 639 transitions, 16873 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-21 17:41:54,944 INFO L231 Difference]: Finished difference. Result has 331 places, 603 transitions, 15873 flow [2024-06-21 17:41:54,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15169, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=312, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15873, PETRI_PLACES=331, PETRI_TRANSITIONS=603} [2024-06-21 17:41:54,944 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 287 predicate places. [2024-06-21 17:41:54,944 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 603 transitions, 15873 flow [2024-06-21 17:41:54,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:54,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:41:54,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:41:54,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 17:41:54,945 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 17:41:54,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:41:54,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1206960269, now seen corresponding path program 2 times [2024-06-21 17:41:54,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:41:54,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078034879] [2024-06-21 17:41:54,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:41:54,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:41:54,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:41:58,109 INFO 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 17:41:58,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:41:58,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078034879] [2024-06-21 17:41:58,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078034879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:41:58,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:41:58,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:41:58,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210810456] [2024-06-21 17:41:58,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:41:58,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:41:58,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:41:58,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:41:58,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:41:58,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:41:58,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 603 transitions, 15873 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:58,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:41:58,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:41:58,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:42:01,303 INFO L124 PetriNetUnfolderBase]: 4469/7228 cut-off events. [2024-06-21 17:42:01,303 INFO L125 PetriNetUnfolderBase]: For 1260161/1260161 co-relation queries the response was YES. [2024-06-21 17:42:01,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96621 conditions, 7228 events. 4469/7228 cut-off events. For 1260161/1260161 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 45935 event pairs, 786 based on Foata normal form. 60/7279 useless extension candidates. Maximal degree in co-relation 96469. Up to 3699 conditions per place. [2024-06-21 17:42:01,421 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 346 selfloop transitions, 327 changer transitions 0/678 dead transitions. [2024-06-21 17:42:01,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 678 transitions, 18748 flow [2024-06-21 17:42:01,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:42:01,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:42:01,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 220 transitions. [2024-06-21 17:42:01,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-21 17:42:01,422 INFO L175 Difference]: Start difference. First operand has 331 places, 603 transitions, 15873 flow. Second operand 12 states and 220 transitions. [2024-06-21 17:42:01,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 678 transitions, 18748 flow [2024-06-21 17:42:03,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 678 transitions, 17706 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-21 17:42:03,907 INFO L231 Difference]: Finished difference. Result has 339 places, 621 transitions, 16344 flow [2024-06-21 17:42:03,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=14835, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=312, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=16344, PETRI_PLACES=339, PETRI_TRANSITIONS=621} [2024-06-21 17:42:03,908 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 295 predicate places. [2024-06-21 17:42:03,908 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 621 transitions, 16344 flow [2024-06-21 17:42:03,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:42:03,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:42:03,908 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 17:42:03,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 17:42:03,909 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 17:42:03,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:42:03,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1441580247, now seen corresponding path program 1 times [2024-06-21 17:42:03,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:42:03,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284575254] [2024-06-21 17:42:03,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:42:03,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:42:03,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:42:06,815 INFO 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 17:42:06,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:42:06,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284575254] [2024-06-21 17:42:06,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284575254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:42:06,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:42:06,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:42:06,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167184440] [2024-06-21 17:42:06,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:42:06,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:42:06,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:42:06,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:42:06,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:42:06,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:42:06,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 621 transitions, 16344 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:42:06,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:42:06,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:42:06,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:42:10,086 INFO L124 PetriNetUnfolderBase]: 4521/7319 cut-off events. [2024-06-21 17:42:10,086 INFO L125 PetriNetUnfolderBase]: For 1236030/1236030 co-relation queries the response was YES. [2024-06-21 17:42:10,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98140 conditions, 7319 events. 4521/7319 cut-off events. For 1236030/1236030 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 47000 event pairs, 948 based on Foata normal form. 28/7338 useless extension candidates. Maximal degree in co-relation 97984. Up to 5333 conditions per place. [2024-06-21 17:42:10,209 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 350 selfloop transitions, 307 changer transitions 0/662 dead transitions. [2024-06-21 17:42:10,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 662 transitions, 18230 flow [2024-06-21 17:42:10,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:42:10,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:42:10,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 17:42:10,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-21 17:42:10,211 INFO L175 Difference]: Start difference. First operand has 339 places, 621 transitions, 16344 flow. Second operand 9 states and 163 transitions. [2024-06-21 17:42:10,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 662 transitions, 18230 flow [2024-06-21 17:42:12,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 662 transitions, 17714 flow, removed 82 selfloop flow, removed 5 redundant places. [2024-06-21 17:42:12,957 INFO L231 Difference]: Finished difference. Result has 344 places, 633 transitions, 16983 flow [2024-06-21 17:42:12,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=15834, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=295, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16983, PETRI_PLACES=344, PETRI_TRANSITIONS=633} [2024-06-21 17:42:12,958 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 300 predicate places. [2024-06-21 17:42:12,958 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 633 transitions, 16983 flow [2024-06-21 17:42:12,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:42:12,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:42:12,959 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 17:42:12,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 17:42:12,959 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 17:42:12,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:42:12,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1441586199, now seen corresponding path program 3 times [2024-06-21 17:42:12,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:42:12,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484609504] [2024-06-21 17:42:12,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:42:12,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:42:12,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:42:16,011 INFO 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 17:42:16,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:42:16,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484609504] [2024-06-21 17:42:16,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484609504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:42:16,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:42:16,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 17:42:16,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063659817] [2024-06-21 17:42:16,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:42:16,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 17:42:16,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:42:16,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 17:42:16,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 17:42:16,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:42:16,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 633 transitions, 16983 flow. Second operand has 12 states, 12 states have (on average 9.583333333333334) internal successors, (115), 12 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:42:16,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:42:16,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:42:16,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:42:19,930 INFO L124 PetriNetUnfolderBase]: 4697/7607 cut-off events. [2024-06-21 17:42:19,931 INFO L125 PetriNetUnfolderBase]: For 1334999/1334999 co-relation queries the response was YES. [2024-06-21 17:42:20,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101402 conditions, 7607 events. 4697/7607 cut-off events. For 1334999/1334999 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 49228 event pairs, 997 based on Foata normal form. 54/7652 useless extension candidates. Maximal degree in co-relation 101244. Up to 5596 conditions per place. [2024-06-21 17:42:20,057 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 365 selfloop transitions, 295 changer transitions 3/668 dead transitions. [2024-06-21 17:42:20,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 668 transitions, 18706 flow [2024-06-21 17:42:20,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:42:20,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:42:20,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-21 17:42:20,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41627906976744183 [2024-06-21 17:42:20,059 INFO L175 Difference]: Start difference. First operand has 344 places, 633 transitions, 16983 flow. Second operand 10 states and 179 transitions. [2024-06-21 17:42:20,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 668 transitions, 18706 flow [2024-06-21 17:42:22,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 668 transitions, 18507 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-21 17:42:22,562 INFO L231 Difference]: Finished difference. Result has 349 places, 634 transitions, 17449 flow [2024-06-21 17:42:22,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16784, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=293, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17449, PETRI_PLACES=349, PETRI_TRANSITIONS=634} [2024-06-21 17:42:22,563 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 305 predicate places. [2024-06-21 17:42:22,563 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 634 transitions, 17449 flow [2024-06-21 17:42:22,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.583333333333334) internal successors, (115), 12 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:42:22,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:42:22,564 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 17:42:22,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 17:42:22,564 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 17:42:22,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:42:22,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1436016274, now seen corresponding path program 1 times [2024-06-21 17:42:22,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:42:22,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054470352] [2024-06-21 17:42:22,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:42:22,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:42:22,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:42:25,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:42:25,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:42:25,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054470352] [2024-06-21 17:42:25,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054470352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:42:25,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:42:25,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:42:25,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937886252] [2024-06-21 17:42:25,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:42:25,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:42:25,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:42:25,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:42:25,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:42:25,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:42:25,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 634 transitions, 17449 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:42:25,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:42:25,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:42:25,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:42:29,096 INFO L124 PetriNetUnfolderBase]: 4931/7949 cut-off events. [2024-06-21 17:42:29,096 INFO L125 PetriNetUnfolderBase]: For 1391187/1391187 co-relation queries the response was YES. [2024-06-21 17:42:29,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108953 conditions, 7949 events. 4931/7949 cut-off events. For 1391187/1391187 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 51624 event pairs, 964 based on Foata normal form. 13/7943 useless extension candidates. Maximal degree in co-relation 108793. Up to 5516 conditions per place. [2024-06-21 17:42:29,228 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 389 selfloop transitions, 330 changer transitions 0/724 dead transitions. [2024-06-21 17:42:29,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 724 transitions, 20961 flow [2024-06-21 17:42:29,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:42:29,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:42:29,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-21 17:42:29,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4627906976744186 [2024-06-21 17:42:29,230 INFO L175 Difference]: Start difference. First operand has 349 places, 634 transitions, 17449 flow. Second operand 10 states and 199 transitions. [2024-06-21 17:42:29,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 724 transitions, 20961 flow [2024-06-21 17:42:31,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 724 transitions, 20301 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-21 17:42:31,999 INFO L231 Difference]: Finished difference. Result has 354 places, 677 transitions, 18976 flow [2024-06-21 17:42:31,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16811, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=291, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=18976, PETRI_PLACES=354, PETRI_TRANSITIONS=677} [2024-06-21 17:42:32,000 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 310 predicate places. [2024-06-21 17:42:32,000 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 677 transitions, 18976 flow [2024-06-21 17:42:32,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:42:32,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:42:32,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:42:32,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 17:42:32,000 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 17:42:32,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:42:32,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1436016057, now seen corresponding path program 2 times [2024-06-21 17:42:32,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:42:32,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110240769] [2024-06-21 17:42:32,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:42:32,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:42:32,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:42:35,228 INFO 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 17:42:35,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:42:35,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110240769] [2024-06-21 17:42:35,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110240769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:42:35,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:42:35,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:42:35,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302278038] [2024-06-21 17:42:35,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:42:35,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:42:35,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:42:35,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:42:35,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:42:35,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:42:35,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 677 transitions, 18976 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:42:35,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:42:35,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:42:35,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:42:39,002 INFO L124 PetriNetUnfolderBase]: 4826/7824 cut-off events. [2024-06-21 17:42:39,002 INFO L125 PetriNetUnfolderBase]: For 1428190/1428190 co-relation queries the response was YES. [2024-06-21 17:42:39,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104258 conditions, 7824 events. 4826/7824 cut-off events. For 1428190/1428190 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 51152 event pairs, 981 based on Foata normal form. 91/7896 useless extension candidates. Maximal degree in co-relation 104095. Up to 5439 conditions per place. [2024-06-21 17:42:39,134 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 416 selfloop transitions, 312 changer transitions 0/733 dead transitions. [2024-06-21 17:42:39,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 733 transitions, 21419 flow [2024-06-21 17:42:39,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:42:39,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:42:39,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-21 17:42:39,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4627906976744186 [2024-06-21 17:42:39,135 INFO L175 Difference]: Start difference. First operand has 354 places, 677 transitions, 18976 flow. Second operand 10 states and 199 transitions. [2024-06-21 17:42:39,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 733 transitions, 21419 flow [2024-06-21 17:42:42,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 733 transitions, 20888 flow, removed 217 selfloop flow, removed 3 redundant places. [2024-06-21 17:42:42,301 INFO L231 Difference]: Finished difference. Result has 363 places, 686 transitions, 19514 flow [2024-06-21 17:42:42,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=18475, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=304, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=19514, PETRI_PLACES=363, PETRI_TRANSITIONS=686} [2024-06-21 17:42:42,302 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 319 predicate places. [2024-06-21 17:42:42,302 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 686 transitions, 19514 flow [2024-06-21 17:42:42,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:42:42,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:42:42,302 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 17:42:42,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 17:42:42,302 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 17:42:42,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:42:42,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1436008617, now seen corresponding path program 3 times [2024-06-21 17:42:42,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:42:42,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414565443] [2024-06-21 17:42:42,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:42:42,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:42:42,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:42:45,419 INFO 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 17:42:45,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:42:45,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414565443] [2024-06-21 17:42:45,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414565443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:42:45,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:42:45,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:42:45,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786987763] [2024-06-21 17:42:45,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:42:45,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:42:45,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:42:45,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:42:45,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:42:45,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:42:45,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 686 transitions, 19514 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:42:45,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:42:45,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:42:45,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:42:49,238 INFO L124 PetriNetUnfolderBase]: 5146/8333 cut-off events. [2024-06-21 17:42:49,238 INFO L125 PetriNetUnfolderBase]: For 1379045/1379045 co-relation queries the response was YES. [2024-06-21 17:42:49,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111510 conditions, 8333 events. 5146/8333 cut-off events. For 1379045/1379045 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 54881 event pairs, 1001 based on Foata normal form. 30/8354 useless extension candidates. Maximal degree in co-relation 111343. Up to 5461 conditions per place. [2024-06-21 17:42:49,560 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 474 selfloop transitions, 301 changer transitions 0/780 dead transitions. [2024-06-21 17:42:49,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 780 transitions, 23185 flow [2024-06-21 17:42:49,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:42:49,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:42:49,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 220 transitions. [2024-06-21 17:42:49,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-21 17:42:49,561 INFO L175 Difference]: Start difference. First operand has 363 places, 686 transitions, 19514 flow. Second operand 12 states and 220 transitions. [2024-06-21 17:42:49,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 780 transitions, 23185 flow [2024-06-21 17:42:52,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 780 transitions, 22928 flow, removed 80 selfloop flow, removed 3 redundant places. [2024-06-21 17:42:52,441 INFO L231 Difference]: Finished difference. Result has 375 places, 707 transitions, 20698 flow [2024-06-21 17:42:52,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=19277, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=281, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=20698, PETRI_PLACES=375, PETRI_TRANSITIONS=707} [2024-06-21 17:42:52,442 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 331 predicate places. [2024-06-21 17:42:52,442 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 707 transitions, 20698 flow [2024-06-21 17:42:52,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:42:52,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:42:52,443 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 17:42:52,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 17:42:52,443 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 17:42:52,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:42:52,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1003988275, now seen corresponding path program 4 times [2024-06-21 17:42:52,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:42:52,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826397546] [2024-06-21 17:42:52,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:42:52,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:42:52,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:42:55,372 INFO 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 17:42:55,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:42:55,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826397546] [2024-06-21 17:42:55,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826397546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:42:55,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:42:55,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:42:55,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769358738] [2024-06-21 17:42:55,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:42:55,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:42:55,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:42:55,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:42:55,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:42:55,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:42:55,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 707 transitions, 20698 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:42:55,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:42:55,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:42:55,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:42:59,228 INFO L124 PetriNetUnfolderBase]: 5410/8780 cut-off events. [2024-06-21 17:42:59,228 INFO L125 PetriNetUnfolderBase]: For 1610535/1610535 co-relation queries the response was YES. [2024-06-21 17:42:59,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116695 conditions, 8780 events. 5410/8780 cut-off events. For 1610535/1610535 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 58676 event pairs, 1373 based on Foata normal form. 104/8865 useless extension candidates. Maximal degree in co-relation 116523. Up to 7427 conditions per place. [2024-06-21 17:42:59,545 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 602 selfloop transitions, 130 changer transitions 9/746 dead transitions. [2024-06-21 17:42:59,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 746 transitions, 22694 flow [2024-06-21 17:42:59,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:42:59,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:42:59,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-21 17:42:59,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-21 17:42:59,547 INFO L175 Difference]: Start difference. First operand has 375 places, 707 transitions, 20698 flow. Second operand 10 states and 175 transitions. [2024-06-21 17:42:59,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 746 transitions, 22694 flow [2024-06-21 17:43:02,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 746 transitions, 22497 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-21 17:43:02,757 INFO L231 Difference]: Finished difference. Result has 381 places, 709 transitions, 20938 flow [2024-06-21 17:43:02,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=20501, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=20938, PETRI_PLACES=381, PETRI_TRANSITIONS=709} [2024-06-21 17:43:02,758 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 337 predicate places. [2024-06-21 17:43:02,758 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 709 transitions, 20938 flow [2024-06-21 17:43:02,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:43:02,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:43:02,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:43:02,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 17:43:02,758 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 17:43:02,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:43:02,759 INFO L85 PathProgramCache]: Analyzing trace with hash -2038250624, now seen corresponding path program 1 times [2024-06-21 17:43:02,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:43:02,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305986732] [2024-06-21 17:43:02,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:43:02,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:43:02,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:43:05,878 INFO 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 17:43:05,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:43:05,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305986732] [2024-06-21 17:43:05,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305986732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:43:05,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:43:05,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:43:05,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100356452] [2024-06-21 17:43:05,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:43:05,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:43:05,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:43:05,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:43:05,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:43:05,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:43:05,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 709 transitions, 20938 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:43:05,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:43:05,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:43:05,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:43:09,916 INFO L124 PetriNetUnfolderBase]: 5398/8793 cut-off events. [2024-06-21 17:43:09,916 INFO L125 PetriNetUnfolderBase]: For 1400890/1400890 co-relation queries the response was YES. [2024-06-21 17:43:10,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118414 conditions, 8793 events. 5398/8793 cut-off events. For 1400890/1400890 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 59056 event pairs, 1116 based on Foata normal form. 1/8791 useless extension candidates. Maximal degree in co-relation 118238. Up to 7138 conditions per place. [2024-06-21 17:43:10,064 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 505 selfloop transitions, 254 changer transitions 0/764 dead transitions. [2024-06-21 17:43:10,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 764 transitions, 23228 flow [2024-06-21 17:43:10,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:43:10,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:43:10,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-21 17:43:10,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-21 17:43:10,066 INFO L175 Difference]: Start difference. First operand has 381 places, 709 transitions, 20938 flow. Second operand 9 states and 177 transitions. [2024-06-21 17:43:10,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 764 transitions, 23228 flow [2024-06-21 17:43:13,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 764 transitions, 22885 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-21 17:43:13,084 INFO L231 Difference]: Finished difference. Result has 387 places, 723 transitions, 21840 flow [2024-06-21 17:43:13,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=20601, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=21840, PETRI_PLACES=387, PETRI_TRANSITIONS=723} [2024-06-21 17:43:13,085 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 343 predicate places. [2024-06-21 17:43:13,085 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 723 transitions, 21840 flow [2024-06-21 17:43:13,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:43:13,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:43:13,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:43:13,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 17:43:13,085 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 17:43:13,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:43:13,086 INFO L85 PathProgramCache]: Analyzing trace with hash -905399120, now seen corresponding path program 2 times [2024-06-21 17:43:13,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:43:13,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478392576] [2024-06-21 17:43:13,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:43:13,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:43:13,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:43:15,734 INFO 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 17:43:15,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:43:15,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478392576] [2024-06-21 17:43:15,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478392576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:43:15,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:43:15,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:43:15,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047365096] [2024-06-21 17:43:15,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:43:15,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:43:15,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:43:15,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:43:15,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:43:15,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:43:15,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 723 transitions, 21840 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:43:15,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:43:15,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:43:15,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:43:20,893 INFO L124 PetriNetUnfolderBase]: 5424/8816 cut-off events. [2024-06-21 17:43:20,893 INFO L125 PetriNetUnfolderBase]: For 1461215/1461215 co-relation queries the response was YES. [2024-06-21 17:43:20,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120263 conditions, 8816 events. 5424/8816 cut-off events. For 1461215/1461215 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 59044 event pairs, 1410 based on Foata normal form. 1/8814 useless extension candidates. Maximal degree in co-relation 120083. Up to 8351 conditions per place. [2024-06-21 17:43:21,050 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 726 selfloop transitions, 55 changer transitions 0/786 dead transitions. [2024-06-21 17:43:21,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 786 transitions, 24221 flow [2024-06-21 17:43:21,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-21 17:43:21,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-21 17:43:21,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 255 transitions. [2024-06-21 17:43:21,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3706395348837209 [2024-06-21 17:43:21,052 INFO L175 Difference]: Start difference. First operand has 387 places, 723 transitions, 21840 flow. Second operand 16 states and 255 transitions. [2024-06-21 17:43:21,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 786 transitions, 24221 flow [2024-06-21 17:43:24,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 786 transitions, 24056 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-21 17:43:24,487 INFO L231 Difference]: Finished difference. Result has 400 places, 731 transitions, 22173 flow [2024-06-21 17:43:24,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=21679, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=723, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=668, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=22173, PETRI_PLACES=400, PETRI_TRANSITIONS=731} [2024-06-21 17:43:24,488 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 356 predicate places. [2024-06-21 17:43:24,488 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 731 transitions, 22173 flow [2024-06-21 17:43:24,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:43:24,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:43:24,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:43:24,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 17:43:24,489 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 17:43:24,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:43:24,489 INFO L85 PathProgramCache]: Analyzing trace with hash -396851940, now seen corresponding path program 1 times [2024-06-21 17:43:24,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:43:24,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511832010] [2024-06-21 17:43:24,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:43:24,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:43:24,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:43:29,343 INFO 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 17:43:29,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:43:29,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511832010] [2024-06-21 17:43:29,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511832010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:43:29,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:43:29,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:43:29,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117233368] [2024-06-21 17:43:29,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:43:29,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:43:29,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:43:29,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:43:29,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:43:29,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:43:29,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 731 transitions, 22173 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:43:29,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:43:29,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:43:29,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:43:32,974 INFO L124 PetriNetUnfolderBase]: 5434/8821 cut-off events. [2024-06-21 17:43:32,974 INFO L125 PetriNetUnfolderBase]: For 1492566/1492566 co-relation queries the response was YES. [2024-06-21 17:43:33,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120882 conditions, 8821 events. 5434/8821 cut-off events. For 1492566/1492566 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 58985 event pairs, 1413 based on Foata normal form. 2/8813 useless extension candidates. Maximal degree in co-relation 120698. Up to 8342 conditions per place. [2024-06-21 17:43:33,406 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 692 selfloop transitions, 57 changer transitions 0/754 dead transitions. [2024-06-21 17:43:33,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 754 transitions, 24024 flow [2024-06-21 17:43:33,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:43:33,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:43:33,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 17:43:33,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-21 17:43:33,408 INFO L175 Difference]: Start difference. First operand has 400 places, 731 transitions, 22173 flow. Second operand 8 states and 135 transitions. [2024-06-21 17:43:33,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 754 transitions, 24024 flow [2024-06-21 17:43:36,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 754 transitions, 23737 flow, removed 34 selfloop flow, removed 13 redundant places. [2024-06-21 17:43:36,839 INFO L231 Difference]: Finished difference. Result has 395 places, 734 transitions, 22120 flow [2024-06-21 17:43:36,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=21886, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=731, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=677, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=22120, PETRI_PLACES=395, PETRI_TRANSITIONS=734} [2024-06-21 17:43:36,840 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 351 predicate places. [2024-06-21 17:43:36,840 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 734 transitions, 22120 flow [2024-06-21 17:43:36,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:43:36,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:43:36,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:43:36,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 17:43:36,840 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 17:43:36,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:43:36,841 INFO L85 PathProgramCache]: Analyzing trace with hash 474400604, now seen corresponding path program 2 times [2024-06-21 17:43:36,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:43:36,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369358646] [2024-06-21 17:43:36,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:43:36,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:43:36,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:43:41,330 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 17:43:41,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:43:41,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369358646] [2024-06-21 17:43:41,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369358646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:43:41,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:43:41,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:43:41,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863583476] [2024-06-21 17:43:41,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:43:41,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:43:41,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:43:41,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:43:41,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:43:41,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:43:41,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 734 transitions, 22120 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:43:41,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:43:41,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:43:41,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:43:45,507 INFO L124 PetriNetUnfolderBase]: 5422/8825 cut-off events. [2024-06-21 17:43:45,508 INFO L125 PetriNetUnfolderBase]: For 1509026/1509026 co-relation queries the response was YES. [2024-06-21 17:43:45,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120559 conditions, 8825 events. 5422/8825 cut-off events. For 1509026/1509026 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 59202 event pairs, 1370 based on Foata normal form. 2/8818 useless extension candidates. Maximal degree in co-relation 120375. Up to 8328 conditions per place. [2024-06-21 17:43:45,649 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 692 selfloop transitions, 55 changer transitions 0/752 dead transitions. [2024-06-21 17:43:45,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 752 transitions, 23692 flow [2024-06-21 17:43:45,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:43:45,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:43:45,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 17:43:45,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3866279069767442 [2024-06-21 17:43:45,651 INFO L175 Difference]: Start difference. First operand has 395 places, 734 transitions, 22120 flow. Second operand 8 states and 133 transitions. [2024-06-21 17:43:45,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 752 transitions, 23692 flow [2024-06-21 17:43:49,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 752 transitions, 23504 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-21 17:43:49,094 INFO L231 Difference]: Finished difference. Result has 397 places, 734 transitions, 22050 flow [2024-06-21 17:43:49,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=21932, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=734, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=679, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=22050, PETRI_PLACES=397, PETRI_TRANSITIONS=734} [2024-06-21 17:43:49,095 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 353 predicate places. [2024-06-21 17:43:49,095 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 734 transitions, 22050 flow [2024-06-21 17:43:49,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:43:49,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:43:49,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:43:49,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 17:43:49,095 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 17:43:49,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:43:49,096 INFO L85 PathProgramCache]: Analyzing trace with hash -57903364, now seen corresponding path program 1 times [2024-06-21 17:43:49,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:43:49,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445778260] [2024-06-21 17:43:49,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:43:49,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:43:49,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:43:52,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:43:52,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:43:52,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445778260] [2024-06-21 17:43:52,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445778260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:43:52,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:43:52,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:43:52,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298164445] [2024-06-21 17:43:52,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:43:52,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:43:52,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:43:52,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:43:52,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:43:52,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 17:43:52,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 734 transitions, 22050 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:43:52,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:43:52,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 17:43:52,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand