./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe004_power.oepc_pso.oepc_rmo.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/mutex-meet-nonrel/safe004_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe004_power.oepc_pso.oepc_rmo.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe004_power.oepc_pso.oepc_rmo.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-7724a2d-m [2024-06-28 03:53:11,494 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 03:53:11,576 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 03:53:11,582 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 03:53:11,583 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 03:53:11,614 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 03:53:11,615 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 03:53:11,615 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 03:53:11,616 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 03:53:11,620 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 03:53:11,620 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 03:53:11,620 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 03:53:11,622 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 03:53:11,623 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 03:53:11,623 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 03:53:11,623 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 03:53:11,624 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 03:53:11,624 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 03:53:11,624 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 03:53:11,625 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 03:53:11,626 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 03:53:11,626 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 03:53:11,627 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 03:53:11,627 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 03:53:11,627 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 03:53:11,628 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 03:53:11,628 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 03:53:11,628 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 03:53:11,629 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 03:53:11,629 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 03:53:11,630 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 03:53:11,630 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 03:53:11,631 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 03:53:11,631 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 03:53:11,631 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 03:53:11,631 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 03:53:11,632 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 03:53:11,632 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 03:53:11,632 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 03:53:11,632 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 03:53:11,633 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 03:53:11,633 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 03:53:11,633 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 03:53:11,633 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-28 03:53:11,913 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 03:53:11,940 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 03:53:11,943 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 03:53:11,945 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 03:53:11,945 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 03:53:11,946 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe004_power.oepc_pso.oepc_rmo.oepc.i [2024-06-28 03:53:13,187 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 03:53:13,445 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 03:53:13,446 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe004_power.oepc_pso.oepc_rmo.oepc.i [2024-06-28 03:53:13,466 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/226c36ffb/50f7806b379b4d479484a81155e85c5a/FLAG7fae997f5 [2024-06-28 03:53:13,477 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/226c36ffb/50f7806b379b4d479484a81155e85c5a [2024-06-28 03:53:13,479 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 03:53:13,480 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 03:53:13,480 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe004_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-28 03:53:13,637 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 03:53:13,638 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 03:53:13,639 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 03:53:13,639 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 03:53:13,644 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 03:53:13,644 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 03:53:13" (1/2) ... [2024-06-28 03:53:13,648 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e1cae59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:53:13, skipping insertion in model container [2024-06-28 03:53:13,649 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 03:53:13" (1/2) ... [2024-06-28 03:53:13,650 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@182cdc46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:53:13, skipping insertion in model container [2024-06-28 03:53:13,650 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 03:53:13" (2/2) ... [2024-06-28 03:53:13,651 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e1cae59 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:53:13, skipping insertion in model container [2024-06-28 03:53:13,651 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 03:53:13" (2/2) ... [2024-06-28 03:53:13,651 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 03:53:13,764 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 03:53:13,765 INFO L97 edCorrectnessWitness]: Location invariant before [L847-L847] ((((((((((((((((! multithreaded || y$read_delayed_var == 0) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || ((((((((((((((((0 <= __unbuffered_cnt && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)) && (y$w_buff1 == 0 || y$w_buff1 == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2)) [2024-06-28 03:53:13,766 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] ((((((((((((((((! multithreaded || y$read_delayed_var == 0) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || ((((((((((((((((0 <= __unbuffered_cnt && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)) && (y$w_buff1 == 0 || y$w_buff1 == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2)) [2024-06-28 03:53:13,766 INFO L97 edCorrectnessWitness]: Location invariant before [L850-L850] ((((((((((((((((! multithreaded || y$read_delayed_var == 0) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || ((((((((((((((((0 <= __unbuffered_cnt && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)) && (y$w_buff1 == 0 || y$w_buff1 == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2)) [2024-06-28 03:53:13,766 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 03:53:13,766 INFO L106 edCorrectnessWitness]: ghost_update [L845-L845] multithreaded = 1; [2024-06-28 03:53:13,827 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 03:53:14,266 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 03:53:14,280 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 03:53:14,405 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 03:53:14,445 INFO L206 MainTranslator]: Completed translation [2024-06-28 03:53:14,446 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:53:14 WrapperNode [2024-06-28 03:53:14,446 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 03:53:14,447 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 03:53:14,447 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 03:53:14,447 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 03:53:14,454 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 28.06 03:53:14" (1/1) ... [2024-06-28 03:53:14,471 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 28.06 03:53:14" (1/1) ... [2024-06-28 03:53:14,510 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 143 [2024-06-28 03:53:14,511 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 03:53:14,512 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 03:53:14,512 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 03:53:14,512 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 03:53:14,523 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:53:14" (1/1) ... [2024-06-28 03:53:14,523 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:53:14" (1/1) ... [2024-06-28 03:53:14,527 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:53:14" (1/1) ... [2024-06-28 03:53:14,554 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-28 03:53:14,554 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:53:14" (1/1) ... [2024-06-28 03:53:14,555 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:53:14" (1/1) ... [2024-06-28 03:53:14,568 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:53:14" (1/1) ... [2024-06-28 03:53:14,585 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:53:14" (1/1) ... [2024-06-28 03:53:14,587 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:53:14" (1/1) ... [2024-06-28 03:53:14,596 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:53:14" (1/1) ... [2024-06-28 03:53:14,600 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 03:53:14,604 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 03:53:14,604 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 03:53:14,604 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 03:53:14,605 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:53:14" (1/1) ... [2024-06-28 03:53:14,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 03:53:14,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 03:53:14,637 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) [2024-06-28 03:53:14,653 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 [2024-06-28 03:53:14,690 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 03:53:14,691 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 03:53:14,691 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 03:53:14,692 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 03:53:14,692 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 03:53:14,692 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 03:53:14,692 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 03:53:14,693 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 03:53:14,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 03:53:14,693 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 03:53:14,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 03:53:14,694 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 03:53:14,695 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 03:53:14,852 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 03:53:14,855 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 03:53:15,324 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 03:53:15,324 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 03:53:15,561 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 03:53:15,561 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 03:53:15,562 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 03:53:15 BoogieIcfgContainer [2024-06-28 03:53:15,562 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 03:53:15,565 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 03:53:15,565 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 03:53:15,568 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 03:53:15,569 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 03:53:13" (1/4) ... [2024-06-28 03:53:15,569 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d8f2ffc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 03:53:15, skipping insertion in model container [2024-06-28 03:53:15,569 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 03:53:13" (2/4) ... [2024-06-28 03:53:15,570 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d8f2ffc and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 03:53:15, skipping insertion in model container [2024-06-28 03:53:15,570 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:53:14" (3/4) ... [2024-06-28 03:53:15,571 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d8f2ffc and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 03:53:15, skipping insertion in model container [2024-06-28 03:53:15,571 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 03:53:15" (4/4) ... [2024-06-28 03:53:15,572 INFO L112 eAbstractionObserver]: Analyzing ICFG safe004_power.oepc_pso.oepc_rmo.oepc.i [2024-06-28 03:53:15,590 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 03:53:15,590 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-28 03:53:15,590 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 03:53:15,651 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 03:53:15,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-28 03:53:15,727 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-28 03:53:15,727 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 03:53:15,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 37 events. 0/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 60 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-28 03:53:15,729 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-28 03:53:15,732 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-28 03:53:15,748 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 03:53:15,755 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;@f86de7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 03:53:15,755 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-28 03:53:15,766 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 03:53:15,766 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-28 03:53:15,766 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 03:53:15,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:15,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 03:53:15,768 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)] === [2024-06-28 03:53:15,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:15,772 INFO L85 PathProgramCache]: Analyzing trace with hash 440169185, now seen corresponding path program 1 times [2024-06-28 03:53:15,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:15,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183115423] [2024-06-28 03:53:15,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:15,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:15,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:17,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:17,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:17,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183115423] [2024-06-28 03:53:17,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183115423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:17,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:17,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 03:53:17,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733827406] [2024-06-28 03:53:17,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:17,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 03:53:17,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:17,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 03:53:17,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 03:53:17,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-28 03:53:17,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 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) [2024-06-28 03:53:17,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:17,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-28 03:53:17,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:17,633 INFO L124 PetriNetUnfolderBase]: 1650/2465 cut-off events. [2024-06-28 03:53:17,633 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2024-06-28 03:53:17,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5017 conditions, 2465 events. 1650/2465 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11607 event pairs, 881 based on Foata normal form. 4/2429 useless extension candidates. Maximal degree in co-relation 5005. Up to 2444 conditions per place. [2024-06-28 03:53:17,653 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 36 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-28 03:53:17,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 44 transitions, 183 flow [2024-06-28 03:53:17,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 03:53:17,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 03:53:17,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-06-28 03:53:17,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-28 03:53:17,666 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 70 transitions. [2024-06-28 03:53:17,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 44 transitions, 183 flow [2024-06-28 03:53:17,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 44 transitions, 178 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 03:53:17,671 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-28 03:53:17,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-06-28 03:53:17,676 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-28 03:53:17,676 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-28 03:53:17,677 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) [2024-06-28 03:53:17,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:17,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:17,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 03:53:17,677 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)] === [2024-06-28 03:53:17,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:17,678 INFO L85 PathProgramCache]: Analyzing trace with hash 2096760960, now seen corresponding path program 1 times [2024-06-28 03:53:17,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:17,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134085270] [2024-06-28 03:53:17,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:17,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:17,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:18,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:18,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:18,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134085270] [2024-06-28 03:53:18,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134085270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:18,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:18,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 03:53:18,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534246652] [2024-06-28 03:53:18,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:18,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 03:53:18,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:18,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 03:53:18,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-28 03:53:18,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-28 03:53:18,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 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) [2024-06-28 03:53:18,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:18,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-28 03:53:18,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:19,040 INFO L124 PetriNetUnfolderBase]: 1659/2477 cut-off events. [2024-06-28 03:53:19,041 INFO L125 PetriNetUnfolderBase]: For 376/376 co-relation queries the response was YES. [2024-06-28 03:53:19,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5687 conditions, 2477 events. 1659/2477 cut-off events. For 376/376 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11330 event pairs, 955 based on Foata normal form. 6/2483 useless extension candidates. Maximal degree in co-relation 5675. Up to 2441 conditions per place. [2024-06-28 03:53:19,057 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 46 selfloop transitions, 7 changer transitions 0/57 dead transitions. [2024-06-28 03:53:19,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 57 transitions, 268 flow [2024-06-28 03:53:19,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 03:53:19,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 03:53:19,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 89 transitions. [2024-06-28 03:53:19,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55625 [2024-06-28 03:53:19,062 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 89 transitions. [2024-06-28 03:53:19,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 57 transitions, 268 flow [2024-06-28 03:53:19,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 57 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 03:53:19,065 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 154 flow [2024-06-28 03:53:19,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2024-06-28 03:53:19,067 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2024-06-28 03:53:19,067 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 154 flow [2024-06-28 03:53:19,068 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) [2024-06-28 03:53:19,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:19,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:19,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 03:53:19,071 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)] === [2024-06-28 03:53:19,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:19,072 INFO L85 PathProgramCache]: Analyzing trace with hash 575081838, now seen corresponding path program 1 times [2024-06-28 03:53:19,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:19,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288725431] [2024-06-28 03:53:19,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:19,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:19,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:20,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:20,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:20,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288725431] [2024-06-28 03:53:20,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288725431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:20,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:20,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 03:53:20,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119298264] [2024-06-28 03:53:20,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:20,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 03:53:20,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:20,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 03:53:20,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-28 03:53:20,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-28 03:53:20,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 154 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:20,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:20,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-28 03:53:20,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:20,647 INFO L124 PetriNetUnfolderBase]: 1751/2607 cut-off events. [2024-06-28 03:53:20,648 INFO L125 PetriNetUnfolderBase]: For 1290/1290 co-relation queries the response was YES. [2024-06-28 03:53:20,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6759 conditions, 2607 events. 1751/2607 cut-off events. For 1290/1290 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 12068 event pairs, 770 based on Foata normal form. 11/2618 useless extension candidates. Maximal degree in co-relation 6744. Up to 2426 conditions per place. [2024-06-28 03:53:20,662 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 62 selfloop transitions, 16 changer transitions 0/82 dead transitions. [2024-06-28 03:53:20,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 82 transitions, 444 flow [2024-06-28 03:53:20,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 03:53:20,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 03:53:20,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-28 03:53:20,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.595 [2024-06-28 03:53:20,665 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 154 flow. Second operand 5 states and 119 transitions. [2024-06-28 03:53:20,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 82 transitions, 444 flow [2024-06-28 03:53:20,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 82 transitions, 434 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-28 03:53:20,668 INFO L231 Difference]: Finished difference. Result has 51 places, 51 transitions, 257 flow [2024-06-28 03:53:20,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=257, PETRI_PLACES=51, PETRI_TRANSITIONS=51} [2024-06-28 03:53:20,669 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 10 predicate places. [2024-06-28 03:53:20,669 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 51 transitions, 257 flow [2024-06-28 03:53:20,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:20,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:20,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:20,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 03:53:20,670 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:20,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:20,671 INFO L85 PathProgramCache]: Analyzing trace with hash -238910817, now seen corresponding path program 1 times [2024-06-28 03:53:20,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:20,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222297141] [2024-06-28 03:53:20,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:20,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:20,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:21,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:21,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:21,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222297141] [2024-06-28 03:53:21,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222297141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:21,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:21,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 03:53:21,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269234862] [2024-06-28 03:53:21,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:21,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 03:53:21,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:21,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 03:53:21,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 03:53:21,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-28 03:53:21,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 51 transitions, 257 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) [2024-06-28 03:53:21,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:21,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-28 03:53:21,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:22,584 INFO L124 PetriNetUnfolderBase]: 1851/2750 cut-off events. [2024-06-28 03:53:22,585 INFO L125 PetriNetUnfolderBase]: For 3395/3397 co-relation queries the response was YES. [2024-06-28 03:53:22,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8530 conditions, 2750 events. 1851/2750 cut-off events. For 3395/3397 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12970 event pairs, 480 based on Foata normal form. 19/2769 useless extension candidates. Maximal degree in co-relation 8511. Up to 2378 conditions per place. [2024-06-28 03:53:22,604 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 75 selfloop transitions, 32 changer transitions 0/111 dead transitions. [2024-06-28 03:53:22,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 111 transitions, 707 flow [2024-06-28 03:53:22,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:53:22,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:53:22,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-28 03:53:22,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-06-28 03:53:22,609 INFO L175 Difference]: Start difference. First operand has 51 places, 51 transitions, 257 flow. Second operand 6 states and 145 transitions. [2024-06-28 03:53:22,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 111 transitions, 707 flow [2024-06-28 03:53:22,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 111 transitions, 699 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-28 03:53:22,619 INFO L231 Difference]: Finished difference. Result has 60 places, 69 transitions, 482 flow [2024-06-28 03:53:22,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=482, PETRI_PLACES=60, PETRI_TRANSITIONS=69} [2024-06-28 03:53:22,621 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 19 predicate places. [2024-06-28 03:53:22,621 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 69 transitions, 482 flow [2024-06-28 03:53:22,622 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) [2024-06-28 03:53:22,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:22,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:22,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 03:53:22,622 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:22,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:22,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1183700845, now seen corresponding path program 1 times [2024-06-28 03:53:22,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:22,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655801370] [2024-06-28 03:53:22,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:22,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:22,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:23,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:23,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:23,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655801370] [2024-06-28 03:53:23,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655801370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:23,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:23,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:53:23,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643690417] [2024-06-28 03:53:23,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:23,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:53:23,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:23,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:53:23,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:53:23,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-28 03:53:23,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 69 transitions, 482 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) [2024-06-28 03:53:23,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:23,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-28 03:53:23,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:24,741 INFO L124 PetriNetUnfolderBase]: 2014/3020 cut-off events. [2024-06-28 03:53:24,741 INFO L125 PetriNetUnfolderBase]: For 8405/8405 co-relation queries the response was YES. [2024-06-28 03:53:24,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11640 conditions, 3020 events. 2014/3020 cut-off events. For 8405/8405 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 14373 event pairs, 430 based on Foata normal form. 34/3053 useless extension candidates. Maximal degree in co-relation 11615. Up to 2534 conditions per place. [2024-06-28 03:53:24,768 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 108 selfloop transitions, 30 changer transitions 0/142 dead transitions. [2024-06-28 03:53:24,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 142 transitions, 1108 flow [2024-06-28 03:53:24,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:53:24,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:53:24,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-28 03:53:24,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-28 03:53:24,771 INFO L175 Difference]: Start difference. First operand has 60 places, 69 transitions, 482 flow. Second operand 7 states and 165 transitions. [2024-06-28 03:53:24,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 142 transitions, 1108 flow [2024-06-28 03:53:24,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 142 transitions, 1058 flow, removed 25 selfloop flow, removed 0 redundant places. [2024-06-28 03:53:24,787 INFO L231 Difference]: Finished difference. Result has 70 places, 93 transitions, 740 flow [2024-06-28 03:53:24,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=740, PETRI_PLACES=70, PETRI_TRANSITIONS=93} [2024-06-28 03:53:24,790 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 29 predicate places. [2024-06-28 03:53:24,790 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 93 transitions, 740 flow [2024-06-28 03:53:24,791 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) [2024-06-28 03:53:24,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:24,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:24,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 03:53:24,792 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)] === [2024-06-28 03:53:24,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:24,792 INFO L85 PathProgramCache]: Analyzing trace with hash 257532158, now seen corresponding path program 1 times [2024-06-28 03:53:24,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:24,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971340797] [2024-06-28 03:53:24,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:24,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:24,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:25,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:25,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:25,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971340797] [2024-06-28 03:53:25,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971340797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:25,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:25,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 03:53:25,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787377928] [2024-06-28 03:53:25,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:25,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 03:53:25,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:25,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 03:53:25,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-28 03:53:25,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 03:53:25,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 93 transitions, 740 flow. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:25,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:25,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 03:53:25,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:25,963 INFO L124 PetriNetUnfolderBase]: 2000/2999 cut-off events. [2024-06-28 03:53:25,963 INFO L125 PetriNetUnfolderBase]: For 12120/12120 co-relation queries the response was YES. [2024-06-28 03:53:25,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12927 conditions, 2999 events. 2000/2999 cut-off events. For 12120/12120 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 14219 event pairs, 719 based on Foata normal form. 5/3004 useless extension candidates. Maximal degree in co-relation 12894. Up to 2954 conditions per place. [2024-06-28 03:53:25,995 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 92 selfloop transitions, 15 changer transitions 0/110 dead transitions. [2024-06-28 03:53:25,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 110 transitions, 1019 flow [2024-06-28 03:53:25,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 03:53:25,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 03:53:25,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2024-06-28 03:53:25,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.435 [2024-06-28 03:53:25,997 INFO L175 Difference]: Start difference. First operand has 70 places, 93 transitions, 740 flow. Second operand 5 states and 87 transitions. [2024-06-28 03:53:25,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 110 transitions, 1019 flow [2024-06-28 03:53:26,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 110 transitions, 993 flow, removed 13 selfloop flow, removed 0 redundant places. [2024-06-28 03:53:26,017 INFO L231 Difference]: Finished difference. Result has 75 places, 96 transitions, 787 flow [2024-06-28 03:53:26,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=714, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=787, PETRI_PLACES=75, PETRI_TRANSITIONS=96} [2024-06-28 03:53:26,019 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 34 predicate places. [2024-06-28 03:53:26,019 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 96 transitions, 787 flow [2024-06-28 03:53:26,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:26,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:26,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:26,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 03:53:26,020 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)] === [2024-06-28 03:53:26,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:26,021 INFO L85 PathProgramCache]: Analyzing trace with hash -612923430, now seen corresponding path program 1 times [2024-06-28 03:53:26,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:26,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173802403] [2024-06-28 03:53:26,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:26,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:26,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:26,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:26,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:26,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173802403] [2024-06-28 03:53:26,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173802403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:26,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:26,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:53:26,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900659371] [2024-06-28 03:53:26,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:26,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:53:26,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:26,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:53:26,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:53:26,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 03:53:26,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 96 transitions, 787 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:26,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:26,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 03:53:26,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:27,389 INFO L124 PetriNetUnfolderBase]: 1990/2985 cut-off events. [2024-06-28 03:53:27,389 INFO L125 PetriNetUnfolderBase]: For 13885/13885 co-relation queries the response was YES. [2024-06-28 03:53:27,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13227 conditions, 2985 events. 1990/2985 cut-off events. For 13885/13885 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 14107 event pairs, 706 based on Foata normal form. 4/2989 useless extension candidates. Maximal degree in co-relation 13190. Up to 2946 conditions per place. [2024-06-28 03:53:27,415 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 98 selfloop transitions, 11 changer transitions 0/112 dead transitions. [2024-06-28 03:53:27,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 112 transitions, 1045 flow [2024-06-28 03:53:27,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:53:27,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:53:27,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-28 03:53:27,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-28 03:53:27,417 INFO L175 Difference]: Start difference. First operand has 75 places, 96 transitions, 787 flow. Second operand 6 states and 96 transitions. [2024-06-28 03:53:27,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 112 transitions, 1045 flow [2024-06-28 03:53:27,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 112 transitions, 1010 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-28 03:53:27,464 INFO L231 Difference]: Finished difference. Result has 78 places, 96 transitions, 782 flow [2024-06-28 03:53:27,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=752, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=782, PETRI_PLACES=78, PETRI_TRANSITIONS=96} [2024-06-28 03:53:27,465 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 37 predicate places. [2024-06-28 03:53:27,465 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 96 transitions, 782 flow [2024-06-28 03:53:27,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:27,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:27,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:27,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 03:53:27,465 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)] === [2024-06-28 03:53:27,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:27,466 INFO L85 PathProgramCache]: Analyzing trace with hash -2139276307, now seen corresponding path program 1 times [2024-06-28 03:53:27,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:27,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683048482] [2024-06-28 03:53:27,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:27,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:27,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:28,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:28,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:28,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683048482] [2024-06-28 03:53:28,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683048482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:28,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:28,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:53:28,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11585432] [2024-06-28 03:53:28,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:28,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:53:28,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:28,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:53:28,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:53:28,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 03:53:28,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 96 transitions, 782 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:28,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:28,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 03:53:28,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:28,763 INFO L124 PetriNetUnfolderBase]: 2002/3004 cut-off events. [2024-06-28 03:53:28,764 INFO L125 PetriNetUnfolderBase]: For 15968/15970 co-relation queries the response was YES. [2024-06-28 03:53:28,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13545 conditions, 3004 events. 2002/3004 cut-off events. For 15968/15970 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 14274 event pairs, 670 based on Foata normal form. 12/3016 useless extension candidates. Maximal degree in co-relation 13507. Up to 2811 conditions per place. [2024-06-28 03:53:28,786 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 101 selfloop transitions, 23 changer transitions 0/127 dead transitions. [2024-06-28 03:53:28,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 127 transitions, 1201 flow [2024-06-28 03:53:28,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:53:28,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:53:28,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-28 03:53:28,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-28 03:53:28,788 INFO L175 Difference]: Start difference. First operand has 78 places, 96 transitions, 782 flow. Second operand 6 states and 110 transitions. [2024-06-28 03:53:28,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 127 transitions, 1201 flow [2024-06-28 03:53:28,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 127 transitions, 1161 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-28 03:53:28,809 INFO L231 Difference]: Finished difference. Result has 79 places, 100 transitions, 855 flow [2024-06-28 03:53:28,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=742, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=855, PETRI_PLACES=79, PETRI_TRANSITIONS=100} [2024-06-28 03:53:28,811 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 38 predicate places. [2024-06-28 03:53:28,811 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 100 transitions, 855 flow [2024-06-28 03:53:28,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:28,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:28,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:28,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 03:53:28,812 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)] === [2024-06-28 03:53:28,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:28,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1619674787, now seen corresponding path program 2 times [2024-06-28 03:53:28,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:28,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262630958] [2024-06-28 03:53:28,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:28,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:28,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:29,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:29,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:29,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262630958] [2024-06-28 03:53:29,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262630958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:29,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:29,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:53:29,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599109292] [2024-06-28 03:53:29,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:29,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:53:29,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:29,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:53:29,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:53:29,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 03:53:29,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 100 transitions, 855 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:29,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:29,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 03:53:29,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:30,104 INFO L124 PetriNetUnfolderBase]: 1972/2976 cut-off events. [2024-06-28 03:53:30,104 INFO L125 PetriNetUnfolderBase]: For 18324/18324 co-relation queries the response was YES. [2024-06-28 03:53:30,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13632 conditions, 2976 events. 1972/2976 cut-off events. For 18324/18324 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 14287 event pairs, 1040 based on Foata normal form. 5/2981 useless extension candidates. Maximal degree in co-relation 13595. Up to 2918 conditions per place. [2024-06-28 03:53:30,122 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 102 selfloop transitions, 14 changer transitions 0/119 dead transitions. [2024-06-28 03:53:30,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 119 transitions, 1160 flow [2024-06-28 03:53:30,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:53:30,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:53:30,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 106 transitions. [2024-06-28 03:53:30,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37857142857142856 [2024-06-28 03:53:30,124 INFO L175 Difference]: Start difference. First operand has 79 places, 100 transitions, 855 flow. Second operand 7 states and 106 transitions. [2024-06-28 03:53:30,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 119 transitions, 1160 flow [2024-06-28 03:53:30,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 119 transitions, 1126 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-28 03:53:30,142 INFO L231 Difference]: Finished difference. Result has 84 places, 102 transitions, 885 flow [2024-06-28 03:53:30,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=822, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=885, PETRI_PLACES=84, PETRI_TRANSITIONS=102} [2024-06-28 03:53:30,143 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 43 predicate places. [2024-06-28 03:53:30,143 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 102 transitions, 885 flow [2024-06-28 03:53:30,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:30,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:30,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:30,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 03:53:30,144 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)] === [2024-06-28 03:53:30,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:30,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1471340887, now seen corresponding path program 1 times [2024-06-28 03:53:30,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:30,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967958795] [2024-06-28 03:53:30,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:30,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:30,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:30,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:30,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:30,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967958795] [2024-06-28 03:53:30,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967958795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:30,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:30,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:53:30,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294381413] [2024-06-28 03:53:30,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:30,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:53:30,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:30,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:53:30,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:53:30,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 03:53:30,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 102 transitions, 885 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 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) [2024-06-28 03:53:30,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:30,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 03:53:30,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:31,595 INFO L124 PetriNetUnfolderBase]: 2335/3502 cut-off events. [2024-06-28 03:53:31,595 INFO L125 PetriNetUnfolderBase]: For 23238/23246 co-relation queries the response was YES. [2024-06-28 03:53:31,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16341 conditions, 3502 events. 2335/3502 cut-off events. For 23238/23246 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 16956 event pairs, 596 based on Foata normal form. 20/3521 useless extension candidates. Maximal degree in co-relation 16302. Up to 2839 conditions per place. [2024-06-28 03:53:31,622 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 134 selfloop transitions, 53 changer transitions 0/190 dead transitions. [2024-06-28 03:53:31,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 190 transitions, 1934 flow [2024-06-28 03:53:31,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:53:31,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:53:31,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-28 03:53:31,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.478125 [2024-06-28 03:53:31,624 INFO L175 Difference]: Start difference. First operand has 84 places, 102 transitions, 885 flow. Second operand 8 states and 153 transitions. [2024-06-28 03:53:31,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 190 transitions, 1934 flow [2024-06-28 03:53:31,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 190 transitions, 1841 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-28 03:53:31,654 INFO L231 Difference]: Finished difference. Result has 89 places, 136 transitions, 1259 flow [2024-06-28 03:53:31,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=821, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1259, PETRI_PLACES=89, PETRI_TRANSITIONS=136} [2024-06-28 03:53:31,655 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 48 predicate places. [2024-06-28 03:53:31,655 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 136 transitions, 1259 flow [2024-06-28 03:53:31,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 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) [2024-06-28 03:53:31,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:31,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:31,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 03:53:31,656 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:31,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:31,656 INFO L85 PathProgramCache]: Analyzing trace with hash -708936825, now seen corresponding path program 2 times [2024-06-28 03:53:31,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:31,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876128157] [2024-06-28 03:53:31,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:31,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:31,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:32,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:32,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:32,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876128157] [2024-06-28 03:53:32,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876128157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:32,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:32,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:53:32,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512260627] [2024-06-28 03:53:32,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:32,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:53:32,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:32,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:53:32,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:53:32,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 03:53:32,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 136 transitions, 1259 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 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) [2024-06-28 03:53:32,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:32,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 03:53:32,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:33,099 INFO L124 PetriNetUnfolderBase]: 2453/3676 cut-off events. [2024-06-28 03:53:33,099 INFO L125 PetriNetUnfolderBase]: For 28248/28256 co-relation queries the response was YES. [2024-06-28 03:53:33,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18717 conditions, 3676 events. 2453/3676 cut-off events. For 28248/28256 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 17940 event pairs, 599 based on Foata normal form. 26/3701 useless extension candidates. Maximal degree in co-relation 18674. Up to 2938 conditions per place. [2024-06-28 03:53:33,131 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 110 selfloop transitions, 77 changer transitions 0/190 dead transitions. [2024-06-28 03:53:33,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 190 transitions, 2043 flow [2024-06-28 03:53:33,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:53:33,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:53:33,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-28 03:53:33,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46785714285714286 [2024-06-28 03:53:33,133 INFO L175 Difference]: Start difference. First operand has 89 places, 136 transitions, 1259 flow. Second operand 7 states and 131 transitions. [2024-06-28 03:53:33,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 190 transitions, 2043 flow [2024-06-28 03:53:33,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 190 transitions, 1984 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-28 03:53:33,175 INFO L231 Difference]: Finished difference. Result has 96 places, 158 transitions, 1666 flow [2024-06-28 03:53:33,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1216, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1666, PETRI_PLACES=96, PETRI_TRANSITIONS=158} [2024-06-28 03:53:33,176 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 55 predicate places. [2024-06-28 03:53:33,176 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 158 transitions, 1666 flow [2024-06-28 03:53:33,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 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) [2024-06-28 03:53:33,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:33,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:33,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 03:53:33,177 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)] === [2024-06-28 03:53:33,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:33,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1329927319, now seen corresponding path program 3 times [2024-06-28 03:53:33,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:33,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685404971] [2024-06-28 03:53:33,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:33,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:33,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:33,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:33,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:33,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685404971] [2024-06-28 03:53:33,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685404971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:33,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:33,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:53:33,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091671282] [2024-06-28 03:53:33,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:33,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:53:33,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:33,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:53:33,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:53:33,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 03:53:33,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 158 transitions, 1666 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 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) [2024-06-28 03:53:33,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:33,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 03:53:33,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:34,598 INFO L124 PetriNetUnfolderBase]: 2489/3732 cut-off events. [2024-06-28 03:53:34,598 INFO L125 PetriNetUnfolderBase]: For 33109/33109 co-relation queries the response was YES. [2024-06-28 03:53:34,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20413 conditions, 3732 events. 2489/3732 cut-off events. For 33109/33109 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 18219 event pairs, 1032 based on Foata normal form. 6/3738 useless extension candidates. Maximal degree in co-relation 20366. Up to 3644 conditions per place. [2024-06-28 03:53:34,628 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 162 selfloop transitions, 20 changer transitions 0/185 dead transitions. [2024-06-28 03:53:34,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 185 transitions, 2173 flow [2024-06-28 03:53:34,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:53:34,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:53:34,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-28 03:53:34,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3964285714285714 [2024-06-28 03:53:34,631 INFO L175 Difference]: Start difference. First operand has 96 places, 158 transitions, 1666 flow. Second operand 7 states and 111 transitions. [2024-06-28 03:53:34,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 185 transitions, 2173 flow [2024-06-28 03:53:34,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 185 transitions, 2065 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-28 03:53:34,689 INFO L231 Difference]: Finished difference. Result has 101 places, 166 transitions, 1709 flow [2024-06-28 03:53:34,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1567, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1709, PETRI_PLACES=101, PETRI_TRANSITIONS=166} [2024-06-28 03:53:34,690 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 60 predicate places. [2024-06-28 03:53:34,690 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 166 transitions, 1709 flow [2024-06-28 03:53:34,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 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) [2024-06-28 03:53:34,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:34,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:34,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 03:53:34,691 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:34,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:34,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1888413433, now seen corresponding path program 4 times [2024-06-28 03:53:34,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:34,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101224846] [2024-06-28 03:53:34,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:34,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:34,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:35,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:35,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:35,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101224846] [2024-06-28 03:53:35,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101224846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:35,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:35,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:53:35,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973305613] [2024-06-28 03:53:35,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:35,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:53:35,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:35,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:53:35,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:53:35,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 03:53:35,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 166 transitions, 1709 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 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) [2024-06-28 03:53:35,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:35,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 03:53:35,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:36,127 INFO L124 PetriNetUnfolderBase]: 2499/3747 cut-off events. [2024-06-28 03:53:36,127 INFO L125 PetriNetUnfolderBase]: For 32795/32795 co-relation queries the response was YES. [2024-06-28 03:53:36,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20203 conditions, 3747 events. 2499/3747 cut-off events. For 32795/32795 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 18313 event pairs, 1029 based on Foata normal form. 6/3753 useless extension candidates. Maximal degree in co-relation 20154. Up to 3606 conditions per place. [2024-06-28 03:53:36,149 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 163 selfloop transitions, 30 changer transitions 0/196 dead transitions. [2024-06-28 03:53:36,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 196 transitions, 2318 flow [2024-06-28 03:53:36,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:53:36,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:53:36,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-28 03:53:36,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-28 03:53:36,151 INFO L175 Difference]: Start difference. First operand has 101 places, 166 transitions, 1709 flow. Second operand 7 states and 116 transitions. [2024-06-28 03:53:36,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 196 transitions, 2318 flow [2024-06-28 03:53:36,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 196 transitions, 2286 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-28 03:53:36,192 INFO L231 Difference]: Finished difference. Result has 106 places, 174 transitions, 1871 flow [2024-06-28 03:53:36,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1677, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1871, PETRI_PLACES=106, PETRI_TRANSITIONS=174} [2024-06-28 03:53:36,193 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 65 predicate places. [2024-06-28 03:53:36,193 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 174 transitions, 1871 flow [2024-06-28 03:53:36,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 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) [2024-06-28 03:53:36,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:36,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:36,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 03:53:36,194 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)] === [2024-06-28 03:53:36,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:36,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1108291207, now seen corresponding path program 1 times [2024-06-28 03:53:36,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:36,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101199275] [2024-06-28 03:53:36,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:36,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:36,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:37,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:37,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:37,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101199275] [2024-06-28 03:53:37,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101199275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:37,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:37,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:53:37,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659316414] [2024-06-28 03:53:37,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:37,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:53:37,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:37,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:53:37,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:53:37,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 03:53:37,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 174 transitions, 1871 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:37,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:37,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 03:53:37,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:38,178 INFO L124 PetriNetUnfolderBase]: 2491/3734 cut-off events. [2024-06-28 03:53:38,179 INFO L125 PetriNetUnfolderBase]: For 35564/35564 co-relation queries the response was YES. [2024-06-28 03:53:38,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20497 conditions, 3734 events. 2491/3734 cut-off events. For 35564/35564 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 18183 event pairs, 1016 based on Foata normal form. 4/3738 useless extension candidates. Maximal degree in co-relation 20446. Up to 3654 conditions per place. [2024-06-28 03:53:38,200 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 176 selfloop transitions, 16 changer transitions 0/195 dead transitions. [2024-06-28 03:53:38,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 195 transitions, 2335 flow [2024-06-28 03:53:38,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:53:38,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:53:38,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-28 03:53:38,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-28 03:53:38,202 INFO L175 Difference]: Start difference. First operand has 106 places, 174 transitions, 1871 flow. Second operand 7 states and 110 transitions. [2024-06-28 03:53:38,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 195 transitions, 2335 flow [2024-06-28 03:53:38,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 195 transitions, 2300 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-28 03:53:38,247 INFO L231 Difference]: Finished difference. Result has 110 places, 176 transitions, 1903 flow [2024-06-28 03:53:38,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1836, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1903, PETRI_PLACES=110, PETRI_TRANSITIONS=176} [2024-06-28 03:53:38,248 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 69 predicate places. [2024-06-28 03:53:38,248 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 176 transitions, 1903 flow [2024-06-28 03:53:38,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:38,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:38,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:38,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 03:53:38,249 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)] === [2024-06-28 03:53:38,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:38,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1191965320, now seen corresponding path program 1 times [2024-06-28 03:53:38,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:38,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759215618] [2024-06-28 03:53:38,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:38,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:38,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:39,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:39,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:39,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759215618] [2024-06-28 03:53:39,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759215618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:39,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:39,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:53:39,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983868099] [2024-06-28 03:53:39,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:39,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:53:39,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:39,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:53:39,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:53:39,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 03:53:39,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 176 transitions, 1903 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:39,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:39,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 03:53:39,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:39,938 INFO L124 PetriNetUnfolderBase]: 2758/4103 cut-off events. [2024-06-28 03:53:39,938 INFO L125 PetriNetUnfolderBase]: For 40627/40639 co-relation queries the response was YES. [2024-06-28 03:53:39,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22963 conditions, 4103 events. 2758/4103 cut-off events. For 40627/40639 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 20249 event pairs, 638 based on Foata normal form. 17/4120 useless extension candidates. Maximal degree in co-relation 22910. Up to 3673 conditions per place. [2024-06-28 03:53:39,965 INFO L140 encePairwiseOnDemand]: 24/40 looper letters, 203 selfloop transitions, 74 changer transitions 0/280 dead transitions. [2024-06-28 03:53:39,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 280 transitions, 3324 flow [2024-06-28 03:53:39,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:53:39,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:53:39,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-28 03:53:39,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4638888888888889 [2024-06-28 03:53:39,967 INFO L175 Difference]: Start difference. First operand has 110 places, 176 transitions, 1903 flow. Second operand 9 states and 167 transitions. [2024-06-28 03:53:39,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 280 transitions, 3324 flow [2024-06-28 03:53:40,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 280 transitions, 3275 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-28 03:53:40,078 INFO L231 Difference]: Finished difference. Result has 118 places, 230 transitions, 2700 flow [2024-06-28 03:53:40,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1854, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2700, PETRI_PLACES=118, PETRI_TRANSITIONS=230} [2024-06-28 03:53:40,079 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 77 predicate places. [2024-06-28 03:53:40,079 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 230 transitions, 2700 flow [2024-06-28 03:53:40,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:40,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:40,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:40,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 03:53:40,080 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)] === [2024-06-28 03:53:40,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:40,080 INFO L85 PathProgramCache]: Analyzing trace with hash -337253312, now seen corresponding path program 2 times [2024-06-28 03:53:40,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:40,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212636837] [2024-06-28 03:53:40,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:40,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:40,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:40,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:40,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:40,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212636837] [2024-06-28 03:53:40,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212636837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:40,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:40,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:53:40,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145323118] [2024-06-28 03:53:40,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:40,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:53:40,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:40,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:53:40,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:53:40,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 03:53:40,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 230 transitions, 2700 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:40,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:40,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 03:53:40,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:42,126 INFO L124 PetriNetUnfolderBase]: 2847/4227 cut-off events. [2024-06-28 03:53:42,126 INFO L125 PetriNetUnfolderBase]: For 47988/48004 co-relation queries the response was YES. [2024-06-28 03:53:42,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25741 conditions, 4227 events. 2847/4227 cut-off events. For 47988/48004 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 20967 event pairs, 627 based on Foata normal form. 18/4245 useless extension candidates. Maximal degree in co-relation 25683. Up to 3645 conditions per place. [2024-06-28 03:53:42,159 INFO L140 encePairwiseOnDemand]: 24/40 looper letters, 208 selfloop transitions, 104 changer transitions 0/315 dead transitions. [2024-06-28 03:53:42,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 315 transitions, 4064 flow [2024-06-28 03:53:42,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:53:42,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:53:42,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-28 03:53:42,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48 [2024-06-28 03:53:42,161 INFO L175 Difference]: Start difference. First operand has 118 places, 230 transitions, 2700 flow. Second operand 10 states and 192 transitions. [2024-06-28 03:53:42,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 315 transitions, 4064 flow [2024-06-28 03:53:42,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 315 transitions, 4015 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-28 03:53:42,244 INFO L231 Difference]: Finished difference. Result has 128 places, 251 transitions, 3190 flow [2024-06-28 03:53:42,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2651, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3190, PETRI_PLACES=128, PETRI_TRANSITIONS=251} [2024-06-28 03:53:42,245 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 87 predicate places. [2024-06-28 03:53:42,245 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 251 transitions, 3190 flow [2024-06-28 03:53:42,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:42,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:42,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:42,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 03:53:42,246 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)] === [2024-06-28 03:53:42,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:42,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1307394797, now seen corresponding path program 1 times [2024-06-28 03:53:42,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:42,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883898761] [2024-06-28 03:53:42,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:42,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:42,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:42,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:42,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:42,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883898761] [2024-06-28 03:53:42,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883898761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:42,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:42,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:53:42,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125324665] [2024-06-28 03:53:42,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:42,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:53:42,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:42,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:53:42,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:53:42,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 03:53:42,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 251 transitions, 3190 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:42,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:42,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 03:53:42,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:43,946 INFO L124 PetriNetUnfolderBase]: 2955/4389 cut-off events. [2024-06-28 03:53:43,946 INFO L125 PetriNetUnfolderBase]: For 58746/58756 co-relation queries the response was YES. [2024-06-28 03:53:43,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28468 conditions, 4389 events. 2955/4389 cut-off events. For 58746/58756 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 21839 event pairs, 682 based on Foata normal form. 16/4405 useless extension candidates. Maximal degree in co-relation 28406. Up to 3489 conditions per place. [2024-06-28 03:53:43,984 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 194 selfloop transitions, 118 changer transitions 0/315 dead transitions. [2024-06-28 03:53:43,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 315 transitions, 4517 flow [2024-06-28 03:53:43,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:53:43,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:53:43,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-28 03:53:43,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.478125 [2024-06-28 03:53:43,988 INFO L175 Difference]: Start difference. First operand has 128 places, 251 transitions, 3190 flow. Second operand 8 states and 153 transitions. [2024-06-28 03:53:43,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 315 transitions, 4517 flow [2024-06-28 03:53:44,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 315 transitions, 4344 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-28 03:53:44,119 INFO L231 Difference]: Finished difference. Result has 132 places, 275 transitions, 3715 flow [2024-06-28 03:53:44,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3027, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3715, PETRI_PLACES=132, PETRI_TRANSITIONS=275} [2024-06-28 03:53:44,120 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 91 predicate places. [2024-06-28 03:53:44,120 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 275 transitions, 3715 flow [2024-06-28 03:53:44,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:44,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:44,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:44,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 03:53:44,121 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:44,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:44,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1633071931, now seen corresponding path program 2 times [2024-06-28 03:53:44,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:44,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536743401] [2024-06-28 03:53:44,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:44,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:44,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:44,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:44,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:44,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536743401] [2024-06-28 03:53:44,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536743401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:44,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:44,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:53:44,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037856853] [2024-06-28 03:53:44,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:44,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:53:44,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:44,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:53:44,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:53:44,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 03:53:44,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 275 transitions, 3715 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:44,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:44,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 03:53:44,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:45,664 INFO L124 PetriNetUnfolderBase]: 3059/4554 cut-off events. [2024-06-28 03:53:45,664 INFO L125 PetriNetUnfolderBase]: For 66975/66987 co-relation queries the response was YES. [2024-06-28 03:53:45,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30376 conditions, 4554 events. 3059/4554 cut-off events. For 66975/66987 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 22943 event pairs, 647 based on Foata normal form. 14/4568 useless extension candidates. Maximal degree in co-relation 30311. Up to 3554 conditions per place. [2024-06-28 03:53:45,702 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 189 selfloop transitions, 138 changer transitions 0/330 dead transitions. [2024-06-28 03:53:45,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 330 transitions, 4925 flow [2024-06-28 03:53:45,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:53:45,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:53:45,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-28 03:53:45,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.465625 [2024-06-28 03:53:45,704 INFO L175 Difference]: Start difference. First operand has 132 places, 275 transitions, 3715 flow. Second operand 8 states and 149 transitions. [2024-06-28 03:53:45,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 330 transitions, 4925 flow [2024-06-28 03:53:45,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 330 transitions, 4755 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-28 03:53:45,798 INFO L231 Difference]: Finished difference. Result has 138 places, 295 transitions, 4214 flow [2024-06-28 03:53:45,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3559, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4214, PETRI_PLACES=138, PETRI_TRANSITIONS=295} [2024-06-28 03:53:45,799 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 97 predicate places. [2024-06-28 03:53:45,799 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 295 transitions, 4214 flow [2024-06-28 03:53:45,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:45,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:45,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:45,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 03:53:45,799 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)] === [2024-06-28 03:53:45,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:45,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1441021004, now seen corresponding path program 3 times [2024-06-28 03:53:45,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:45,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785929253] [2024-06-28 03:53:45,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:45,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:45,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:46,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:46,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:46,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785929253] [2024-06-28 03:53:46,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785929253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:46,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:46,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:53:46,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276555580] [2024-06-28 03:53:46,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:46,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:53:46,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:46,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:53:46,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:53:46,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 03:53:46,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 295 transitions, 4214 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:46,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:46,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 03:53:46,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:47,702 INFO L124 PetriNetUnfolderBase]: 3064/4557 cut-off events. [2024-06-28 03:53:47,702 INFO L125 PetriNetUnfolderBase]: For 73112/73136 co-relation queries the response was YES. [2024-06-28 03:53:47,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31216 conditions, 4557 events. 3064/4557 cut-off events. For 73112/73136 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 22892 event pairs, 713 based on Foata normal form. 34/4591 useless extension candidates. Maximal degree in co-relation 31148. Up to 3957 conditions per place. [2024-06-28 03:53:47,738 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 228 selfloop transitions, 109 changer transitions 0/340 dead transitions. [2024-06-28 03:53:47,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 340 transitions, 5194 flow [2024-06-28 03:53:47,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:53:47,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:53:47,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-28 03:53:47,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45625 [2024-06-28 03:53:47,740 INFO L175 Difference]: Start difference. First operand has 138 places, 295 transitions, 4214 flow. Second operand 8 states and 146 transitions. [2024-06-28 03:53:47,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 340 transitions, 5194 flow [2024-06-28 03:53:47,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 340 transitions, 5003 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-28 03:53:47,860 INFO L231 Difference]: Finished difference. Result has 143 places, 303 transitions, 4427 flow [2024-06-28 03:53:47,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4028, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4427, PETRI_PLACES=143, PETRI_TRANSITIONS=303} [2024-06-28 03:53:47,860 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 102 predicate places. [2024-06-28 03:53:47,861 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 303 transitions, 4427 flow [2024-06-28 03:53:47,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:47,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:47,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:47,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 03:53:47,861 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:47,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:47,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1444830439, now seen corresponding path program 3 times [2024-06-28 03:53:47,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:47,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045596718] [2024-06-28 03:53:47,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:47,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:47,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:48,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:48,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:48,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045596718] [2024-06-28 03:53:48,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045596718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:48,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:48,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:53:48,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636957809] [2024-06-28 03:53:48,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:48,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:53:48,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:48,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:53:48,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:53:48,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 03:53:48,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 303 transitions, 4427 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:48,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:48,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 03:53:48,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:49,401 INFO L124 PetriNetUnfolderBase]: 3072/4578 cut-off events. [2024-06-28 03:53:49,401 INFO L125 PetriNetUnfolderBase]: For 81412/81418 co-relation queries the response was YES. [2024-06-28 03:53:49,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32006 conditions, 4578 events. 3072/4578 cut-off events. For 81412/81418 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 23230 event pairs, 786 based on Foata normal form. 20/4598 useless extension candidates. Maximal degree in co-relation 31936. Up to 3566 conditions per place. [2024-06-28 03:53:49,440 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 187 selfloop transitions, 152 changer transitions 0/342 dead transitions. [2024-06-28 03:53:49,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 342 transitions, 5487 flow [2024-06-28 03:53:49,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:53:49,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:53:49,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-28 03:53:49,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-28 03:53:49,442 INFO L175 Difference]: Start difference. First operand has 143 places, 303 transitions, 4427 flow. Second operand 7 states and 133 transitions. [2024-06-28 03:53:49,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 342 transitions, 5487 flow [2024-06-28 03:53:49,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 342 transitions, 5295 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-28 03:53:49,570 INFO L231 Difference]: Finished difference. Result has 146 places, 308 transitions, 4643 flow [2024-06-28 03:53:49,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4235, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4643, PETRI_PLACES=146, PETRI_TRANSITIONS=308} [2024-06-28 03:53:49,571 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 105 predicate places. [2024-06-28 03:53:49,571 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 308 transitions, 4643 flow [2024-06-28 03:53:49,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:49,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:49,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:49,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 03:53:49,572 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:49,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:49,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1444836019, now seen corresponding path program 4 times [2024-06-28 03:53:49,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:49,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68471971] [2024-06-28 03:53:49,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:49,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:49,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:50,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:50,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:50,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68471971] [2024-06-28 03:53:50,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68471971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:50,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:50,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:53:50,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263617517] [2024-06-28 03:53:50,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:50,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:53:50,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:50,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:53:50,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:53:50,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 03:53:50,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 308 transitions, 4643 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:50,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:50,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 03:53:50,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:51,280 INFO L124 PetriNetUnfolderBase]: 3122/4650 cut-off events. [2024-06-28 03:53:51,280 INFO L125 PetriNetUnfolderBase]: For 88350/88362 co-relation queries the response was YES. [2024-06-28 03:53:51,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33198 conditions, 4650 events. 3122/4650 cut-off events. For 88350/88362 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 23520 event pairs, 656 based on Foata normal form. 18/4668 useless extension candidates. Maximal degree in co-relation 33127. Up to 3589 conditions per place. [2024-06-28 03:53:51,314 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 184 selfloop transitions, 155 changer transitions 0/342 dead transitions. [2024-06-28 03:53:51,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 342 transitions, 5619 flow [2024-06-28 03:53:51,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:53:51,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:53:51,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-28 03:53:51,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-28 03:53:51,316 INFO L175 Difference]: Start difference. First operand has 146 places, 308 transitions, 4643 flow. Second operand 7 states and 126 transitions. [2024-06-28 03:53:51,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 342 transitions, 5619 flow [2024-06-28 03:53:51,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 342 transitions, 5368 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-28 03:53:51,433 INFO L231 Difference]: Finished difference. Result has 149 places, 315 transitions, 4841 flow [2024-06-28 03:53:51,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4404, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4841, PETRI_PLACES=149, PETRI_TRANSITIONS=315} [2024-06-28 03:53:51,434 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 108 predicate places. [2024-06-28 03:53:51,434 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 315 transitions, 4841 flow [2024-06-28 03:53:51,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:51,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:51,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:51,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 03:53:51,435 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:51,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:51,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1721658116, now seen corresponding path program 1 times [2024-06-28 03:53:51,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:51,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567178131] [2024-06-28 03:53:51,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:51,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:51,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:52,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:52,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:52,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567178131] [2024-06-28 03:53:52,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567178131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:52,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:52,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:53:52,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657242881] [2024-06-28 03:53:52,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:52,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:53:52,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:52,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:53:52,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:53:52,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 03:53:52,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 315 transitions, 4841 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:52,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:52,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 03:53:52,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:53,346 INFO L124 PetriNetUnfolderBase]: 3114/4641 cut-off events. [2024-06-28 03:53:53,346 INFO L125 PetriNetUnfolderBase]: For 88176/88176 co-relation queries the response was YES. [2024-06-28 03:53:53,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33195 conditions, 4641 events. 3114/4641 cut-off events. For 88176/88176 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 23474 event pairs, 1111 based on Foata normal form. 3/4644 useless extension candidates. Maximal degree in co-relation 33123. Up to 4517 conditions per place. [2024-06-28 03:53:53,386 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 306 selfloop transitions, 26 changer transitions 0/335 dead transitions. [2024-06-28 03:53:53,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 335 transitions, 5596 flow [2024-06-28 03:53:53,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:53:53,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:53:53,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-28 03:53:53,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3964285714285714 [2024-06-28 03:53:53,387 INFO L175 Difference]: Start difference. First operand has 149 places, 315 transitions, 4841 flow. Second operand 7 states and 111 transitions. [2024-06-28 03:53:53,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 335 transitions, 5596 flow [2024-06-28 03:53:53,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 335 transitions, 5343 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-28 03:53:53,530 INFO L231 Difference]: Finished difference. Result has 152 places, 316 transitions, 4683 flow [2024-06-28 03:53:53,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4591, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4683, PETRI_PLACES=152, PETRI_TRANSITIONS=316} [2024-06-28 03:53:53,531 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 111 predicate places. [2024-06-28 03:53:53,531 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 316 transitions, 4683 flow [2024-06-28 03:53:53,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:53,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:53,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:53,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 03:53:53,531 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:53,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:53,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1695166173, now seen corresponding path program 5 times [2024-06-28 03:53:53,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:53,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411376440] [2024-06-28 03:53:53,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:53,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:53,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:54,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:54,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:54,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411376440] [2024-06-28 03:53:54,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411376440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:54,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:54,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:53:54,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008240693] [2024-06-28 03:53:54,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:54,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:53:54,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:54,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:53:54,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:53:54,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 03:53:54,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 316 transitions, 4683 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:54,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:54,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 03:53:54,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:55,208 INFO L124 PetriNetUnfolderBase]: 3117/4644 cut-off events. [2024-06-28 03:53:55,208 INFO L125 PetriNetUnfolderBase]: For 86587/86591 co-relation queries the response was YES. [2024-06-28 03:53:55,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32483 conditions, 4644 events. 3117/4644 cut-off events. For 86587/86591 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 23499 event pairs, 1121 based on Foata normal form. 12/4656 useless extension candidates. Maximal degree in co-relation 32410. Up to 4487 conditions per place. [2024-06-28 03:53:55,252 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 313 selfloop transitions, 27 changer transitions 0/343 dead transitions. [2024-06-28 03:53:55,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 343 transitions, 5555 flow [2024-06-28 03:53:55,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:53:55,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:53:55,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-28 03:53:55,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035714285714286 [2024-06-28 03:53:55,253 INFO L175 Difference]: Start difference. First operand has 152 places, 316 transitions, 4683 flow. Second operand 7 states and 113 transitions. [2024-06-28 03:53:55,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 343 transitions, 5555 flow [2024-06-28 03:53:55,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 343 transitions, 5513 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-28 03:53:55,405 INFO L231 Difference]: Finished difference. Result has 154 places, 323 transitions, 4832 flow [2024-06-28 03:53:55,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4641, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4832, PETRI_PLACES=154, PETRI_TRANSITIONS=323} [2024-06-28 03:53:55,406 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 113 predicate places. [2024-06-28 03:53:55,406 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 323 transitions, 4832 flow [2024-06-28 03:53:55,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:55,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:55,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:55,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 03:53:55,407 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:55,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:55,407 INFO L85 PathProgramCache]: Analyzing trace with hash -22893210, now seen corresponding path program 1 times [2024-06-28 03:53:55,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:55,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492334872] [2024-06-28 03:53:55,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:55,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:55,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:56,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:56,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:56,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492334872] [2024-06-28 03:53:56,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492334872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:56,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:56,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:53:56,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430509444] [2024-06-28 03:53:56,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:56,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:53:56,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:56,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:53:56,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:53:56,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 03:53:56,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 323 transitions, 4832 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:56,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:56,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 03:53:56,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:57,418 INFO L124 PetriNetUnfolderBase]: 3472/5183 cut-off events. [2024-06-28 03:53:57,418 INFO L125 PetriNetUnfolderBase]: For 103094/103118 co-relation queries the response was YES. [2024-06-28 03:53:57,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36465 conditions, 5183 events. 3472/5183 cut-off events. For 103094/103118 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 27027 event pairs, 710 based on Foata normal form. 44/5227 useless extension candidates. Maximal degree in co-relation 36391. Up to 4239 conditions per place. [2024-06-28 03:53:57,468 INFO L140 encePairwiseOnDemand]: 24/40 looper letters, 308 selfloop transitions, 82 changer transitions 0/393 dead transitions. [2024-06-28 03:53:57,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 393 transitions, 6231 flow [2024-06-28 03:53:57,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:53:57,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:53:57,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-28 03:53:57,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49166666666666664 [2024-06-28 03:53:57,470 INFO L175 Difference]: Start difference. First operand has 154 places, 323 transitions, 4832 flow. Second operand 9 states and 177 transitions. [2024-06-28 03:53:57,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 393 transitions, 6231 flow [2024-06-28 03:53:57,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 393 transitions, 6172 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-28 03:53:57,663 INFO L231 Difference]: Finished difference. Result has 159 places, 334 transitions, 5117 flow [2024-06-28 03:53:57,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4773, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5117, PETRI_PLACES=159, PETRI_TRANSITIONS=334} [2024-06-28 03:53:57,664 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 118 predicate places. [2024-06-28 03:53:57,664 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 334 transitions, 5117 flow [2024-06-28 03:53:57,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:57,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:57,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:57,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 03:53:57,664 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:57,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:57,665 INFO L85 PathProgramCache]: Analyzing trace with hash 62965320, now seen corresponding path program 2 times [2024-06-28 03:53:57,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:57,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755231534] [2024-06-28 03:53:57,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:57,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:57,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:58,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:58,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:58,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755231534] [2024-06-28 03:53:58,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755231534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:58,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:58,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:53:58,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667340118] [2024-06-28 03:53:58,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:58,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:53:58,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:58,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:53:58,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:53:58,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 03:53:58,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 334 transitions, 5117 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:58,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:58,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 03:53:58,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:59,662 INFO L124 PetriNetUnfolderBase]: 3540/5285 cut-off events. [2024-06-28 03:53:59,662 INFO L125 PetriNetUnfolderBase]: For 114712/114736 co-relation queries the response was YES. [2024-06-28 03:53:59,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38646 conditions, 5285 events. 3540/5285 cut-off events. For 114712/114736 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 27514 event pairs, 763 based on Foata normal form. 44/5329 useless extension candidates. Maximal degree in co-relation 38570. Up to 4716 conditions per place. [2024-06-28 03:53:59,705 INFO L140 encePairwiseOnDemand]: 24/40 looper letters, 306 selfloop transitions, 85 changer transitions 0/394 dead transitions. [2024-06-28 03:53:59,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 394 transitions, 6358 flow [2024-06-28 03:53:59,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:53:59,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:53:59,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-28 03:53:59,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675 [2024-06-28 03:53:59,707 INFO L175 Difference]: Start difference. First operand has 159 places, 334 transitions, 5117 flow. Second operand 10 states and 187 transitions. [2024-06-28 03:53:59,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 394 transitions, 6358 flow [2024-06-28 03:53:59,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 394 transitions, 6239 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-28 03:53:59,920 INFO L231 Difference]: Finished difference. Result has 164 places, 338 transitions, 5251 flow [2024-06-28 03:53:59,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5006, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5251, PETRI_PLACES=164, PETRI_TRANSITIONS=338} [2024-06-28 03:53:59,921 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 123 predicate places. [2024-06-28 03:53:59,921 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 338 transitions, 5251 flow [2024-06-28 03:53:59,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:59,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:59,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:59,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 03:53:59,922 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:59,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:59,922 INFO L85 PathProgramCache]: Analyzing trace with hash -130853996, now seen corresponding path program 1 times [2024-06-28 03:53:59,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:59,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657014366] [2024-06-28 03:53:59,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:59,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:59,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:00,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:00,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:00,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657014366] [2024-06-28 03:54:00,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657014366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:00,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:00,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:54:00,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30863989] [2024-06-28 03:54:00,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:00,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:54:00,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:00,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:54:00,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:54:00,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 03:54:00,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 338 transitions, 5251 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:00,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:00,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 03:54:00,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:01,915 INFO L124 PetriNetUnfolderBase]: 3530/5271 cut-off events. [2024-06-28 03:54:01,915 INFO L125 PetriNetUnfolderBase]: For 118241/118262 co-relation queries the response was YES. [2024-06-28 03:54:01,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39098 conditions, 5271 events. 3530/5271 cut-off events. For 118241/118262 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 27456 event pairs, 772 based on Foata normal form. 22/5293 useless extension candidates. Maximal degree in co-relation 39020. Up to 4224 conditions per place. [2024-06-28 03:54:01,964 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 228 selfloop transitions, 147 changer transitions 0/378 dead transitions. [2024-06-28 03:54:01,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 378 transitions, 6310 flow [2024-06-28 03:54:01,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:54:01,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:54:01,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-28 03:54:01,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4527777777777778 [2024-06-28 03:54:01,966 INFO L175 Difference]: Start difference. First operand has 164 places, 338 transitions, 5251 flow. Second operand 9 states and 163 transitions. [2024-06-28 03:54:01,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 378 transitions, 6310 flow [2024-06-28 03:54:02,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 378 transitions, 6130 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-28 03:54:02,164 INFO L231 Difference]: Finished difference. Result has 165 places, 338 transitions, 5373 flow [2024-06-28 03:54:02,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5071, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5373, PETRI_PLACES=165, PETRI_TRANSITIONS=338} [2024-06-28 03:54:02,164 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 124 predicate places. [2024-06-28 03:54:02,165 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 338 transitions, 5373 flow [2024-06-28 03:54:02,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:02,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:02,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:02,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 03:54:02,165 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:02,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:02,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1871464390, now seen corresponding path program 3 times [2024-06-28 03:54:02,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:02,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243405006] [2024-06-28 03:54:02,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:02,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:02,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:02,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:02,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:02,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243405006] [2024-06-28 03:54:02,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243405006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:02,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:02,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:54:02,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10958032] [2024-06-28 03:54:02,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:02,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:54:02,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:02,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:54:02,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:54:02,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 03:54:02,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 338 transitions, 5373 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:02,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:02,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 03:54:02,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:04,099 INFO L124 PetriNetUnfolderBase]: 3601/5390 cut-off events. [2024-06-28 03:54:04,099 INFO L125 PetriNetUnfolderBase]: For 126928/126962 co-relation queries the response was YES. [2024-06-28 03:54:04,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40254 conditions, 5390 events. 3601/5390 cut-off events. For 126928/126962 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 28448 event pairs, 706 based on Foata normal form. 36/5426 useless extension candidates. Maximal degree in co-relation 40175. Up to 4152 conditions per place. [2024-06-28 03:54:04,149 INFO L140 encePairwiseOnDemand]: 24/40 looper letters, 293 selfloop transitions, 121 changer transitions 0/417 dead transitions. [2024-06-28 03:54:04,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 417 transitions, 6956 flow [2024-06-28 03:54:04,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:54:04,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:54:04,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 201 transitions. [2024-06-28 03:54:04,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5025 [2024-06-28 03:54:04,151 INFO L175 Difference]: Start difference. First operand has 165 places, 338 transitions, 5373 flow. Second operand 10 states and 201 transitions. [2024-06-28 03:54:04,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 417 transitions, 6956 flow [2024-06-28 03:54:04,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 417 transitions, 6730 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-28 03:54:04,385 INFO L231 Difference]: Finished difference. Result has 170 places, 345 transitions, 5541 flow [2024-06-28 03:54:04,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5149, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5541, PETRI_PLACES=170, PETRI_TRANSITIONS=345} [2024-06-28 03:54:04,385 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 129 predicate places. [2024-06-28 03:54:04,386 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 345 transitions, 5541 flow [2024-06-28 03:54:04,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:04,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:04,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:04,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 03:54:04,386 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:04,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:04,386 INFO L85 PathProgramCache]: Analyzing trace with hash -624195662, now seen corresponding path program 4 times [2024-06-28 03:54:04,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:04,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506107432] [2024-06-28 03:54:04,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:04,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:04,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:04,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:04,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:04,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506107432] [2024-06-28 03:54:04,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506107432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:04,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:04,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:54:04,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492330386] [2024-06-28 03:54:04,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:04,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:54:04,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:04,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:54:04,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:54:04,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:54:04,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 345 transitions, 5541 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:04,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:04,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:54:04,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:06,135 INFO L124 PetriNetUnfolderBase]: 3816/5914 cut-off events. [2024-06-28 03:54:06,136 INFO L125 PetriNetUnfolderBase]: For 159938/160090 co-relation queries the response was YES. [2024-06-28 03:54:06,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43135 conditions, 5914 events. 3816/5914 cut-off events. For 159938/160090 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 34059 event pairs, 696 based on Foata normal form. 155/6045 useless extension candidates. Maximal degree in co-relation 43054. Up to 3283 conditions per place. [2024-06-28 03:54:06,197 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 202 selfloop transitions, 155 changer transitions 0/410 dead transitions. [2024-06-28 03:54:06,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 410 transitions, 6941 flow [2024-06-28 03:54:06,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:54:06,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:54:06,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-28 03:54:06,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.496875 [2024-06-28 03:54:06,199 INFO L175 Difference]: Start difference. First operand has 170 places, 345 transitions, 5541 flow. Second operand 8 states and 159 transitions. [2024-06-28 03:54:06,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 410 transitions, 6941 flow [2024-06-28 03:54:06,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 410 transitions, 6748 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-28 03:54:06,608 INFO L231 Difference]: Finished difference. Result has 173 places, 361 transitions, 6008 flow [2024-06-28 03:54:06,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5380, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6008, PETRI_PLACES=173, PETRI_TRANSITIONS=361} [2024-06-28 03:54:06,609 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 132 predicate places. [2024-06-28 03:54:06,609 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 361 transitions, 6008 flow [2024-06-28 03:54:06,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:06,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:06,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:06,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 03:54:06,610 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:06,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:06,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1864917190, now seen corresponding path program 5 times [2024-06-28 03:54:06,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:06,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143133431] [2024-06-28 03:54:06,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:06,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:06,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:07,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:07,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:07,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143133431] [2024-06-28 03:54:07,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143133431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:07,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:07,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:54:07,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616076963] [2024-06-28 03:54:07,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:07,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:54:07,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:07,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:54:07,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:54:07,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 03:54:07,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 361 transitions, 6008 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:07,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:07,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 03:54:07,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:08,763 INFO L124 PetriNetUnfolderBase]: 4092/6206 cut-off events. [2024-06-28 03:54:08,763 INFO L125 PetriNetUnfolderBase]: For 157070/157094 co-relation queries the response was YES. [2024-06-28 03:54:08,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47059 conditions, 6206 events. 4092/6206 cut-off events. For 157070/157094 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 34502 event pairs, 1002 based on Foata normal form. 30/6236 useless extension candidates. Maximal degree in co-relation 46975. Up to 5416 conditions per place. [2024-06-28 03:54:08,823 INFO L140 encePairwiseOnDemand]: 24/40 looper letters, 310 selfloop transitions, 119 changer transitions 0/432 dead transitions. [2024-06-28 03:54:08,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 432 transitions, 7463 flow [2024-06-28 03:54:08,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:54:08,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:54:08,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 211 transitions. [2024-06-28 03:54:08,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47954545454545455 [2024-06-28 03:54:08,824 INFO L175 Difference]: Start difference. First operand has 173 places, 361 transitions, 6008 flow. Second operand 11 states and 211 transitions. [2024-06-28 03:54:08,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 432 transitions, 7463 flow [2024-06-28 03:54:09,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 432 transitions, 7294 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-28 03:54:09,139 INFO L231 Difference]: Finished difference. Result has 180 places, 363 transitions, 6139 flow [2024-06-28 03:54:09,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5843, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6139, PETRI_PLACES=180, PETRI_TRANSITIONS=363} [2024-06-28 03:54:09,140 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 139 predicate places. [2024-06-28 03:54:09,140 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 363 transitions, 6139 flow [2024-06-28 03:54:09,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:09,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:09,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:09,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 03:54:09,141 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:09,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:09,142 INFO L85 PathProgramCache]: Analyzing trace with hash -2098678490, now seen corresponding path program 1 times [2024-06-28 03:54:09,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:09,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734245165] [2024-06-28 03:54:09,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:09,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:09,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:10,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:10,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:10,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734245165] [2024-06-28 03:54:10,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734245165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:10,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:10,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:54:10,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008908164] [2024-06-28 03:54:10,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:10,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:54:10,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:10,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:54:10,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:54:10,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 03:54:10,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 363 transitions, 6139 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:10,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:10,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 03:54:10,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:11,577 INFO L124 PetriNetUnfolderBase]: 4272/6509 cut-off events. [2024-06-28 03:54:11,578 INFO L125 PetriNetUnfolderBase]: For 180016/180050 co-relation queries the response was YES. [2024-06-28 03:54:11,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49144 conditions, 6509 events. 4272/6509 cut-off events. For 180016/180050 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 36776 event pairs, 1035 based on Foata normal form. 72/6581 useless extension candidates. Maximal degree in co-relation 49059. Up to 5181 conditions per place. [2024-06-28 03:54:11,641 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 258 selfloop transitions, 151 changer transitions 0/412 dead transitions. [2024-06-28 03:54:11,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 412 transitions, 7370 flow [2024-06-28 03:54:11,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:54:11,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:54:11,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-28 03:54:11,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46944444444444444 [2024-06-28 03:54:11,643 INFO L175 Difference]: Start difference. First operand has 180 places, 363 transitions, 6139 flow. Second operand 9 states and 169 transitions. [2024-06-28 03:54:11,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 412 transitions, 7370 flow [2024-06-28 03:54:11,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 412 transitions, 7196 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-28 03:54:11,982 INFO L231 Difference]: Finished difference. Result has 182 places, 367 transitions, 6334 flow [2024-06-28 03:54:11,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5965, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6334, PETRI_PLACES=182, PETRI_TRANSITIONS=367} [2024-06-28 03:54:11,982 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 141 predicate places. [2024-06-28 03:54:11,982 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 367 transitions, 6334 flow [2024-06-28 03:54:11,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:11,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:11,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:11,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 03:54:11,983 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:11,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:11,984 INFO L85 PathProgramCache]: Analyzing trace with hash 218531134, now seen corresponding path program 6 times [2024-06-28 03:54:11,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:11,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008523858] [2024-06-28 03:54:11,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:11,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:11,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:12,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:12,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:12,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008523858] [2024-06-28 03:54:12,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008523858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:12,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:12,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:54:12,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964085286] [2024-06-28 03:54:12,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:12,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:54:12,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:12,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:54:12,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:54:12,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 03:54:12,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 367 transitions, 6334 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:12,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:12,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 03:54:12,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:14,118 INFO L124 PetriNetUnfolderBase]: 4578/6977 cut-off events. [2024-06-28 03:54:14,118 INFO L125 PetriNetUnfolderBase]: For 198637/198675 co-relation queries the response was YES. [2024-06-28 03:54:14,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53790 conditions, 6977 events. 4578/6977 cut-off events. For 198637/198675 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 39995 event pairs, 864 based on Foata normal form. 58/7035 useless extension candidates. Maximal degree in co-relation 53704. Up to 5143 conditions per place. [2024-06-28 03:54:14,198 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 287 selfloop transitions, 138 changer transitions 0/428 dead transitions. [2024-06-28 03:54:14,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 428 transitions, 7795 flow [2024-06-28 03:54:14,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:54:14,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:54:14,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-28 03:54:14,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4875 [2024-06-28 03:54:14,199 INFO L175 Difference]: Start difference. First operand has 182 places, 367 transitions, 6334 flow. Second operand 8 states and 156 transitions. [2024-06-28 03:54:14,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 428 transitions, 7795 flow [2024-06-28 03:54:14,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 428 transitions, 7486 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-28 03:54:14,617 INFO L231 Difference]: Finished difference. Result has 185 places, 380 transitions, 6625 flow [2024-06-28 03:54:14,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6029, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6625, PETRI_PLACES=185, PETRI_TRANSITIONS=380} [2024-06-28 03:54:14,617 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 144 predicate places. [2024-06-28 03:54:14,617 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 380 transitions, 6625 flow [2024-06-28 03:54:14,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:14,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:14,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:14,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 03:54:14,618 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:14,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:14,618 INFO L85 PathProgramCache]: Analyzing trace with hash 218591584, now seen corresponding path program 7 times [2024-06-28 03:54:14,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:14,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617156572] [2024-06-28 03:54:14,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:14,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:14,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:15,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:15,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:15,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617156572] [2024-06-28 03:54:15,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617156572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:15,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:15,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:54:15,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202252018] [2024-06-28 03:54:15,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:15,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:54:15,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:15,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:54:15,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:54:15,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 03:54:15,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 380 transitions, 6625 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:15,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:15,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 03:54:15,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:16,838 INFO L124 PetriNetUnfolderBase]: 4675/7131 cut-off events. [2024-06-28 03:54:16,838 INFO L125 PetriNetUnfolderBase]: For 222512/222536 co-relation queries the response was YES. [2024-06-28 03:54:16,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56562 conditions, 7131 events. 4675/7131 cut-off events. For 222512/222536 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 41037 event pairs, 1179 based on Foata normal form. 66/7197 useless extension candidates. Maximal degree in co-relation 56474. Up to 6185 conditions per place. [2024-06-28 03:54:16,925 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 301 selfloop transitions, 127 changer transitions 0/431 dead transitions. [2024-06-28 03:54:16,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 431 transitions, 7883 flow [2024-06-28 03:54:16,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:54:16,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:54:16,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-28 03:54:16,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4638888888888889 [2024-06-28 03:54:16,926 INFO L175 Difference]: Start difference. First operand has 185 places, 380 transitions, 6625 flow. Second operand 9 states and 167 transitions. [2024-06-28 03:54:16,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 431 transitions, 7883 flow [2024-06-28 03:54:17,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 431 transitions, 7729 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-28 03:54:17,547 INFO L231 Difference]: Finished difference. Result has 189 places, 385 transitions, 6877 flow [2024-06-28 03:54:17,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6475, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6877, PETRI_PLACES=189, PETRI_TRANSITIONS=385} [2024-06-28 03:54:17,548 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 148 predicate places. [2024-06-28 03:54:17,548 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 385 transitions, 6877 flow [2024-06-28 03:54:17,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:17,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:17,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:17,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 03:54:17,549 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:17,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:17,549 INFO L85 PathProgramCache]: Analyzing trace with hash 221392868, now seen corresponding path program 2 times [2024-06-28 03:54:17,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:17,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034151489] [2024-06-28 03:54:17,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:17,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:17,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:18,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:18,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:18,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034151489] [2024-06-28 03:54:18,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034151489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:18,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:18,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:54:18,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379925800] [2024-06-28 03:54:18,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:18,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:54:18,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:18,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:54:18,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:54:18,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 03:54:18,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 385 transitions, 6877 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:18,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:18,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 03:54:18,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:19,912 INFO L124 PetriNetUnfolderBase]: 4659/7104 cut-off events. [2024-06-28 03:54:19,912 INFO L125 PetriNetUnfolderBase]: For 209401/209443 co-relation queries the response was YES. [2024-06-28 03:54:19,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56924 conditions, 7104 events. 4659/7104 cut-off events. For 209401/209443 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 40894 event pairs, 1188 based on Foata normal form. 44/7148 useless extension candidates. Maximal degree in co-relation 56835. Up to 6014 conditions per place. [2024-06-28 03:54:19,977 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 258 selfloop transitions, 157 changer transitions 0/418 dead transitions. [2024-06-28 03:54:19,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 418 transitions, 7983 flow [2024-06-28 03:54:19,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:54:19,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:54:19,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-28 03:54:19,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44375 [2024-06-28 03:54:19,979 INFO L175 Difference]: Start difference. First operand has 189 places, 385 transitions, 6877 flow. Second operand 8 states and 142 transitions. [2024-06-28 03:54:19,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 418 transitions, 7983 flow [2024-06-28 03:54:20,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 418 transitions, 7730 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-28 03:54:20,364 INFO L231 Difference]: Finished difference. Result has 191 places, 385 transitions, 6962 flow [2024-06-28 03:54:20,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6632, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6962, PETRI_PLACES=191, PETRI_TRANSITIONS=385} [2024-06-28 03:54:20,365 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 150 predicate places. [2024-06-28 03:54:20,365 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 385 transitions, 6962 flow [2024-06-28 03:54:20,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:20,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:20,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:20,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 03:54:20,366 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:20,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:20,366 INFO L85 PathProgramCache]: Analyzing trace with hash 336863962, now seen corresponding path program 2 times [2024-06-28 03:54:20,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:20,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654525250] [2024-06-28 03:54:20,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:20,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:20,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:21,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:21,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:21,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654525250] [2024-06-28 03:54:21,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654525250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:21,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:21,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:54:21,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035550495] [2024-06-28 03:54:21,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:21,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:54:21,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:21,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:54:21,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:54:21,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 03:54:21,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 385 transitions, 6962 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:21,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:21,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 03:54:21,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:23,064 INFO L124 PetriNetUnfolderBase]: 5106/7820 cut-off events. [2024-06-28 03:54:23,065 INFO L125 PetriNetUnfolderBase]: For 226616/226618 co-relation queries the response was YES. [2024-06-28 03:54:23,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61125 conditions, 7820 events. 5106/7820 cut-off events. For 226616/226618 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 46184 event pairs, 1770 based on Foata normal form. 42/7862 useless extension candidates. Maximal degree in co-relation 61035. Up to 6497 conditions per place. [2024-06-28 03:54:23,153 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 312 selfloop transitions, 165 changer transitions 0/480 dead transitions. [2024-06-28 03:54:23,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 480 transitions, 9645 flow [2024-06-28 03:54:23,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:54:23,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:54:23,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-28 03:54:23,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2024-06-28 03:54:23,155 INFO L175 Difference]: Start difference. First operand has 191 places, 385 transitions, 6962 flow. Second operand 9 states and 154 transitions. [2024-06-28 03:54:23,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 480 transitions, 9645 flow [2024-06-28 03:54:23,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 480 transitions, 9164 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-28 03:54:23,635 INFO L231 Difference]: Finished difference. Result has 195 places, 437 transitions, 8378 flow [2024-06-28 03:54:23,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6591, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8378, PETRI_PLACES=195, PETRI_TRANSITIONS=437} [2024-06-28 03:54:23,636 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 154 predicate places. [2024-06-28 03:54:23,637 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 437 transitions, 8378 flow [2024-06-28 03:54:23,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:23,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:23,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:23,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 03:54:23,637 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:23,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:23,638 INFO L85 PathProgramCache]: Analyzing trace with hash -2067968328, now seen corresponding path program 3 times [2024-06-28 03:54:23,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:23,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083401344] [2024-06-28 03:54:23,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:23,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:23,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:24,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:24,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:24,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083401344] [2024-06-28 03:54:24,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083401344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:24,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:24,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:54:24,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187739241] [2024-06-28 03:54:24,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:24,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:54:24,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:24,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:54:24,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:54:24,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 03:54:24,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 437 transitions, 8378 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:24,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:24,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 03:54:24,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:26,158 INFO L124 PetriNetUnfolderBase]: 5134/7857 cut-off events. [2024-06-28 03:54:26,159 INFO L125 PetriNetUnfolderBase]: For 215858/215858 co-relation queries the response was YES. [2024-06-28 03:54:26,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62576 conditions, 7857 events. 5134/7857 cut-off events. For 215858/215858 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 46494 event pairs, 1886 based on Foata normal form. 6/7863 useless extension candidates. Maximal degree in co-relation 62484. Up to 7587 conditions per place. [2024-06-28 03:54:26,248 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 420 selfloop transitions, 43 changer transitions 0/466 dead transitions. [2024-06-28 03:54:26,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 466 transitions, 9484 flow [2024-06-28 03:54:26,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:54:26,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:54:26,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-28 03:54:26,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-28 03:54:26,250 INFO L175 Difference]: Start difference. First operand has 195 places, 437 transitions, 8378 flow. Second operand 8 states and 128 transitions. [2024-06-28 03:54:26,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 466 transitions, 9484 flow [2024-06-28 03:54:26,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 466 transitions, 9236 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-28 03:54:26,755 INFO L231 Difference]: Finished difference. Result has 197 places, 440 transitions, 8292 flow [2024-06-28 03:54:26,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8130, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8292, PETRI_PLACES=197, PETRI_TRANSITIONS=440} [2024-06-28 03:54:26,756 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 156 predicate places. [2024-06-28 03:54:26,756 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 440 transitions, 8292 flow [2024-06-28 03:54:26,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:26,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:26,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:26,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 03:54:26,756 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:26,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:26,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1010536008, now seen corresponding path program 4 times [2024-06-28 03:54:26,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:26,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018874925] [2024-06-28 03:54:26,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:26,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:26,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:27,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:27,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:27,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018874925] [2024-06-28 03:54:27,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018874925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:27,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:27,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:54:27,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51506818] [2024-06-28 03:54:27,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:27,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:54:27,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:27,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:54:27,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:54:27,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 03:54:27,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 440 transitions, 8292 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:27,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:27,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 03:54:27,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:29,297 INFO L124 PetriNetUnfolderBase]: 5162/7902 cut-off events. [2024-06-28 03:54:29,297 INFO L125 PetriNetUnfolderBase]: For 223084/223084 co-relation queries the response was YES. [2024-06-28 03:54:29,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62646 conditions, 7902 events. 5162/7902 cut-off events. For 223084/223084 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 46805 event pairs, 1896 based on Foata normal form. 6/7908 useless extension candidates. Maximal degree in co-relation 62553. Up to 7691 conditions per place. [2024-06-28 03:54:29,367 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 439 selfloop transitions, 25 changer transitions 0/467 dead transitions. [2024-06-28 03:54:29,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 467 transitions, 9377 flow [2024-06-28 03:54:29,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:54:29,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:54:29,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 133 transitions. [2024-06-28 03:54:29,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36944444444444446 [2024-06-28 03:54:29,368 INFO L175 Difference]: Start difference. First operand has 197 places, 440 transitions, 8292 flow. Second operand 9 states and 133 transitions. [2024-06-28 03:54:29,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 467 transitions, 9377 flow [2024-06-28 03:54:29,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 467 transitions, 9249 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-28 03:54:29,786 INFO L231 Difference]: Finished difference. Result has 200 places, 443 transitions, 8295 flow [2024-06-28 03:54:29,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8164, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8295, PETRI_PLACES=200, PETRI_TRANSITIONS=443} [2024-06-28 03:54:29,787 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 159 predicate places. [2024-06-28 03:54:29,787 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 443 transitions, 8295 flow [2024-06-28 03:54:29,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:29,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:29,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:29,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 03:54:29,788 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:29,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:29,788 INFO L85 PathProgramCache]: Analyzing trace with hash -84311608, now seen corresponding path program 5 times [2024-06-28 03:54:29,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:29,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595082381] [2024-06-28 03:54:29,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:29,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:29,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:30,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:30,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:30,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595082381] [2024-06-28 03:54:30,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595082381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:30,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:30,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:54:30,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977189826] [2024-06-28 03:54:30,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:30,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:54:30,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:30,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:54:30,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:54:30,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 03:54:30,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 443 transitions, 8295 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:30,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:30,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 03:54:30,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:32,492 INFO L124 PetriNetUnfolderBase]: 5149/7884 cut-off events. [2024-06-28 03:54:32,492 INFO L125 PetriNetUnfolderBase]: For 229668/229668 co-relation queries the response was YES. [2024-06-28 03:54:32,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62629 conditions, 7884 events. 5149/7884 cut-off events. For 229668/229668 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 46734 event pairs, 1891 based on Foata normal form. 6/7890 useless extension candidates. Maximal degree in co-relation 62535. Up to 7633 conditions per place. [2024-06-28 03:54:32,582 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 435 selfloop transitions, 32 changer transitions 0/470 dead transitions. [2024-06-28 03:54:32,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 470 transitions, 9392 flow [2024-06-28 03:54:32,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:54:32,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:54:32,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-28 03:54:32,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.390625 [2024-06-28 03:54:32,584 INFO L175 Difference]: Start difference. First operand has 200 places, 443 transitions, 8295 flow. Second operand 8 states and 125 transitions. [2024-06-28 03:54:32,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 470 transitions, 9392 flow [2024-06-28 03:54:33,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 470 transitions, 9300 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-28 03:54:33,103 INFO L231 Difference]: Finished difference. Result has 202 places, 446 transitions, 8359 flow [2024-06-28 03:54:33,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8203, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8359, PETRI_PLACES=202, PETRI_TRANSITIONS=446} [2024-06-28 03:54:33,104 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 161 predicate places. [2024-06-28 03:54:33,104 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 446 transitions, 8359 flow [2024-06-28 03:54:33,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:33,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:33,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:33,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 03:54:33,105 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:33,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:33,105 INFO L85 PathProgramCache]: Analyzing trace with hash -84014938, now seen corresponding path program 6 times [2024-06-28 03:54:33,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:33,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277654126] [2024-06-28 03:54:33,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:33,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:33,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:34,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:34,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:34,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277654126] [2024-06-28 03:54:34,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277654126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:34,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:34,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:54:34,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153951040] [2024-06-28 03:54:34,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:34,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:54:34,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:34,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:54:34,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:54:34,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 03:54:34,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 446 transitions, 8359 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:34,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:34,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 03:54:34,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:35,738 INFO L124 PetriNetUnfolderBase]: 5141/7858 cut-off events. [2024-06-28 03:54:35,738 INFO L125 PetriNetUnfolderBase]: For 236296/236296 co-relation queries the response was YES. [2024-06-28 03:54:35,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62789 conditions, 7858 events. 5141/7858 cut-off events. For 236296/236296 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 46287 event pairs, 1846 based on Foata normal form. 4/7862 useless extension candidates. Maximal degree in co-relation 62694. Up to 7672 conditions per place. [2024-06-28 03:54:35,819 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 451 selfloop transitions, 18 changer transitions 0/472 dead transitions. [2024-06-28 03:54:35,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 472 transitions, 9419 flow [2024-06-28 03:54:35,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:54:35,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:54:35,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-28 03:54:35,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-06-28 03:54:35,821 INFO L175 Difference]: Start difference. First operand has 202 places, 446 transitions, 8359 flow. Second operand 8 states and 124 transitions. [2024-06-28 03:54:35,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 472 transitions, 9419 flow [2024-06-28 03:54:36,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 472 transitions, 9299 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-28 03:54:36,317 INFO L231 Difference]: Finished difference. Result has 204 places, 448 transitions, 8328 flow [2024-06-28 03:54:36,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8241, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8328, PETRI_PLACES=204, PETRI_TRANSITIONS=448} [2024-06-28 03:54:36,318 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 163 predicate places. [2024-06-28 03:54:36,318 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 448 transitions, 8328 flow [2024-06-28 03:54:36,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:36,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:36,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:36,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 03:54:36,319 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:36,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:36,320 INFO L85 PathProgramCache]: Analyzing trace with hash -84311856, now seen corresponding path program 1 times [2024-06-28 03:54:36,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:36,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906452178] [2024-06-28 03:54:36,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:36,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:36,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:37,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:37,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:37,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906452178] [2024-06-28 03:54:37,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906452178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:37,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:37,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:54:37,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854352063] [2024-06-28 03:54:37,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:37,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:54:37,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:37,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:54:37,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:54:37,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 03:54:37,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 448 transitions, 8328 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:37,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:37,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 03:54:37,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:38,813 INFO L124 PetriNetUnfolderBase]: 5111/7817 cut-off events. [2024-06-28 03:54:38,813 INFO L125 PetriNetUnfolderBase]: For 231727/231731 co-relation queries the response was YES. [2024-06-28 03:54:38,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61988 conditions, 7817 events. 5111/7817 cut-off events. For 231727/231731 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 46130 event pairs, 1877 based on Foata normal form. 8/7825 useless extension candidates. Maximal degree in co-relation 61892. Up to 7564 conditions per place. [2024-06-28 03:54:38,885 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 428 selfloop transitions, 39 changer transitions 0/470 dead transitions. [2024-06-28 03:54:38,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 470 transitions, 9398 flow [2024-06-28 03:54:38,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:54:38,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:54:38,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-28 03:54:38,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035714285714286 [2024-06-28 03:54:38,886 INFO L175 Difference]: Start difference. First operand has 204 places, 448 transitions, 8328 flow. Second operand 7 states and 113 transitions. [2024-06-28 03:54:38,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 470 transitions, 9398 flow [2024-06-28 03:54:39,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 470 transitions, 9313 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-28 03:54:39,368 INFO L231 Difference]: Finished difference. Result has 205 places, 450 transitions, 8395 flow [2024-06-28 03:54:39,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8247, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8395, PETRI_PLACES=205, PETRI_TRANSITIONS=450} [2024-06-28 03:54:39,368 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 164 predicate places. [2024-06-28 03:54:39,368 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 450 transitions, 8395 flow [2024-06-28 03:54:39,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:39,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:39,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:39,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 03:54:39,369 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)] === [2024-06-28 03:54:39,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:39,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1043492351, now seen corresponding path program 1 times [2024-06-28 03:54:39,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:39,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011610136] [2024-06-28 03:54:39,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:39,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:39,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:39,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:39,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:39,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011610136] [2024-06-28 03:54:39,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011610136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:39,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:39,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:54:39,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52662370] [2024-06-28 03:54:39,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:39,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:54:39,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:39,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:54:39,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:54:40,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 03:54:40,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 450 transitions, 8395 flow. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 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) [2024-06-28 03:54:40,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:40,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 03:54:40,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:41,423 INFO L124 PetriNetUnfolderBase]: 5073/7752 cut-off events. [2024-06-28 03:54:41,423 INFO L125 PetriNetUnfolderBase]: For 235039/235047 co-relation queries the response was YES. [2024-06-28 03:54:41,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61766 conditions, 7752 events. 5073/7752 cut-off events. For 235039/235047 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 45637 event pairs, 1677 based on Foata normal form. 14/7766 useless extension candidates. Maximal degree in co-relation 61669. Up to 7563 conditions per place. [2024-06-28 03:54:41,512 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 448 selfloop transitions, 25 changer transitions 0/476 dead transitions. [2024-06-28 03:54:41,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 476 transitions, 9577 flow [2024-06-28 03:54:41,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 03:54:41,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 03:54:41,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-28 03:54:41,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445 [2024-06-28 03:54:41,513 INFO L175 Difference]: Start difference. First operand has 205 places, 450 transitions, 8395 flow. Second operand 5 states and 89 transitions. [2024-06-28 03:54:41,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 476 transitions, 9577 flow [2024-06-28 03:54:42,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 476 transitions, 9509 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-28 03:54:42,359 INFO L231 Difference]: Finished difference. Result has 205 places, 456 transitions, 8504 flow [2024-06-28 03:54:42,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8327, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=8504, PETRI_PLACES=205, PETRI_TRANSITIONS=456} [2024-06-28 03:54:42,360 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 164 predicate places. [2024-06-28 03:54:42,360 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 456 transitions, 8504 flow [2024-06-28 03:54:42,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 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) [2024-06-28 03:54:42,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:42,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:42,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 03:54:42,360 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:42,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:42,361 INFO L85 PathProgramCache]: Analyzing trace with hash 2114147068, now seen corresponding path program 1 times [2024-06-28 03:54:42,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:42,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834386661] [2024-06-28 03:54:42,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:42,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:42,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:42,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:42,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:42,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834386661] [2024-06-28 03:54:42,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834386661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:42,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:42,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:54:42,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090133005] [2024-06-28 03:54:42,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:42,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:54:42,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:42,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:54:42,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:54:42,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 03:54:42,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 456 transitions, 8504 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:42,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:42,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 03:54:42,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:44,698 INFO L124 PetriNetUnfolderBase]: 5659/8705 cut-off events. [2024-06-28 03:54:44,698 INFO L125 PetriNetUnfolderBase]: For 282867/282900 co-relation queries the response was YES. [2024-06-28 03:54:44,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68114 conditions, 8705 events. 5659/8705 cut-off events. For 282867/282900 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 52875 event pairs, 1353 based on Foata normal form. 50/8755 useless extension candidates. Maximal degree in co-relation 68016. Up to 5761 conditions per place. [2024-06-28 03:54:44,803 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 316 selfloop transitions, 206 changer transitions 0/525 dead transitions. [2024-06-28 03:54:44,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 525 transitions, 10184 flow [2024-06-28 03:54:44,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:54:44,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:54:44,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-28 03:54:44,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46111111111111114 [2024-06-28 03:54:44,804 INFO L175 Difference]: Start difference. First operand has 205 places, 456 transitions, 8504 flow. Second operand 9 states and 166 transitions. [2024-06-28 03:54:44,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 525 transitions, 10184 flow [2024-06-28 03:54:45,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 525 transitions, 10126 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-28 03:54:45,491 INFO L231 Difference]: Finished difference. Result has 213 places, 468 transitions, 9181 flow [2024-06-28 03:54:45,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8446, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9181, PETRI_PLACES=213, PETRI_TRANSITIONS=468} [2024-06-28 03:54:45,492 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 172 predicate places. [2024-06-28 03:54:45,492 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 468 transitions, 9181 flow [2024-06-28 03:54:45,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:45,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:45,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:45,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 03:54:45,493 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:45,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:45,494 INFO L85 PathProgramCache]: Analyzing trace with hash -707814546, now seen corresponding path program 2 times [2024-06-28 03:54:45,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:45,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076820979] [2024-06-28 03:54:45,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:45,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:45,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:46,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:46,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:46,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076820979] [2024-06-28 03:54:46,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076820979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:46,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:46,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:54:46,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225030464] [2024-06-28 03:54:46,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:46,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:54:46,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:46,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:54:46,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:54:46,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 03:54:46,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 468 transitions, 9181 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:46,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:46,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 03:54:46,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:48,372 INFO L124 PetriNetUnfolderBase]: 5938/9171 cut-off events. [2024-06-28 03:54:48,372 INFO L125 PetriNetUnfolderBase]: For 325851/325890 co-relation queries the response was YES. [2024-06-28 03:54:48,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73691 conditions, 9171 events. 5938/9171 cut-off events. For 325851/325890 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 56622 event pairs, 1518 based on Foata normal form. 56/9227 useless extension candidates. Maximal degree in co-relation 73590. Up to 7085 conditions per place. [2024-06-28 03:54:48,484 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 316 selfloop transitions, 201 changer transitions 0/520 dead transitions. [2024-06-28 03:54:48,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 520 transitions, 10699 flow [2024-06-28 03:54:48,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:54:48,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:54:48,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-28 03:54:48,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-28 03:54:48,486 INFO L175 Difference]: Start difference. First operand has 213 places, 468 transitions, 9181 flow. Second operand 9 states and 168 transitions. [2024-06-28 03:54:48,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 520 transitions, 10699 flow [2024-06-28 03:54:49,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 520 transitions, 10414 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-28 03:54:49,188 INFO L231 Difference]: Finished difference. Result has 218 places, 473 transitions, 9478 flow [2024-06-28 03:54:49,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8896, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9478, PETRI_PLACES=218, PETRI_TRANSITIONS=473} [2024-06-28 03:54:49,189 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 177 predicate places. [2024-06-28 03:54:49,189 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 473 transitions, 9478 flow [2024-06-28 03:54:49,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:49,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:49,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:49,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 03:54:49,190 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:49,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:49,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1955648724, now seen corresponding path program 3 times [2024-06-28 03:54:49,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:49,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060288573] [2024-06-28 03:54:49,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:49,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:49,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:49,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:49,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:49,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060288573] [2024-06-28 03:54:49,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060288573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:49,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:49,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:54:49,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261971571] [2024-06-28 03:54:49,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:49,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:54:49,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:49,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:54:49,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:54:49,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 03:54:49,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 473 transitions, 9478 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:49,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:49,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 03:54:49,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:52,013 INFO L124 PetriNetUnfolderBase]: 6089/9405 cut-off events. [2024-06-28 03:54:52,014 INFO L125 PetriNetUnfolderBase]: For 342396/342426 co-relation queries the response was YES. [2024-06-28 03:54:52,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76722 conditions, 9405 events. 6089/9405 cut-off events. For 342396/342426 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 58440 event pairs, 1699 based on Foata normal form. 58/9463 useless extension candidates. Maximal degree in co-relation 76618. Up to 8463 conditions per place. [2024-06-28 03:54:52,128 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 428 selfloop transitions, 128 changer transitions 0/559 dead transitions. [2024-06-28 03:54:52,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 559 transitions, 11872 flow [2024-06-28 03:54:52,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:54:52,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:54:52,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-28 03:54:52,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44722222222222224 [2024-06-28 03:54:52,129 INFO L175 Difference]: Start difference. First operand has 218 places, 473 transitions, 9478 flow. Second operand 9 states and 161 transitions. [2024-06-28 03:54:52,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 559 transitions, 11872 flow [2024-06-28 03:54:52,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 559 transitions, 11593 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-28 03:54:52,887 INFO L231 Difference]: Finished difference. Result has 225 places, 517 transitions, 10689 flow [2024-06-28 03:54:52,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9229, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10689, PETRI_PLACES=225, PETRI_TRANSITIONS=517} [2024-06-28 03:54:52,888 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 184 predicate places. [2024-06-28 03:54:52,888 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 517 transitions, 10689 flow [2024-06-28 03:54:52,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:52,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:52,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:52,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 03:54:52,889 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:52,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:52,889 INFO L85 PathProgramCache]: Analyzing trace with hash 2018897460, now seen corresponding path program 4 times [2024-06-28 03:54:52,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:52,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316027641] [2024-06-28 03:54:52,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:52,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:52,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:53,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:53,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:53,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316027641] [2024-06-28 03:54:53,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316027641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:53,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:53,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:54:53,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204420601] [2024-06-28 03:54:53,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:53,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:54:53,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:53,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:54:53,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:54:53,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 03:54:53,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 517 transitions, 10689 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:53,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:53,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 03:54:53,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:55,910 INFO L124 PetriNetUnfolderBase]: 6448/9991 cut-off events. [2024-06-28 03:54:55,910 INFO L125 PetriNetUnfolderBase]: For 373909/373942 co-relation queries the response was YES. [2024-06-28 03:54:55,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83080 conditions, 9991 events. 6448/9991 cut-off events. For 373909/373942 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 63010 event pairs, 1706 based on Foata normal form. 52/10043 useless extension candidates. Maximal degree in co-relation 82971. Up to 7926 conditions per place. [2024-06-28 03:54:56,024 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 355 selfloop transitions, 225 changer transitions 0/583 dead transitions. [2024-06-28 03:54:56,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 583 transitions, 12562 flow [2024-06-28 03:54:56,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:54:56,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:54:56,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-28 03:54:56,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-28 03:54:56,025 INFO L175 Difference]: Start difference. First operand has 225 places, 517 transitions, 10689 flow. Second operand 9 states and 170 transitions. [2024-06-28 03:54:56,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 583 transitions, 12562 flow [2024-06-28 03:54:56,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 583 transitions, 12511 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-28 03:54:56,899 INFO L231 Difference]: Finished difference. Result has 233 places, 527 transitions, 11384 flow [2024-06-28 03:54:56,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10642, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11384, PETRI_PLACES=233, PETRI_TRANSITIONS=527} [2024-06-28 03:54:56,900 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 192 predicate places. [2024-06-28 03:54:56,900 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 527 transitions, 11384 flow [2024-06-28 03:54:56,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:56,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:56,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:56,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 03:54:56,900 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:56,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:56,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1935784290, now seen corresponding path program 5 times [2024-06-28 03:54:56,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:56,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568422515] [2024-06-28 03:54:56,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:56,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:56,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:57,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:57,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:57,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568422515] [2024-06-28 03:54:57,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568422515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:57,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:57,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:54:57,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34546469] [2024-06-28 03:54:57,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:57,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:54:57,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:57,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:54:57,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:54:57,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 03:54:57,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 527 transitions, 11384 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:57,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:57,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 03:54:57,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:59,895 INFO L124 PetriNetUnfolderBase]: 6518/10124 cut-off events. [2024-06-28 03:54:59,895 INFO L125 PetriNetUnfolderBase]: For 398556/398589 co-relation queries the response was YES. [2024-06-28 03:54:59,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85000 conditions, 10124 events. 6518/10124 cut-off events. For 398556/398589 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 64310 event pairs, 1782 based on Foata normal form. 64/10188 useless extension candidates. Maximal degree in co-relation 84888. Up to 8563 conditions per place. [2024-06-28 03:55:00,046 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 355 selfloop transitions, 220 changer transitions 0/578 dead transitions. [2024-06-28 03:55:00,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 578 transitions, 12906 flow [2024-06-28 03:55:00,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:55:00,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:55:00,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-28 03:55:00,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-28 03:55:00,048 INFO L175 Difference]: Start difference. First operand has 233 places, 527 transitions, 11384 flow. Second operand 9 states and 165 transitions. [2024-06-28 03:55:00,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 578 transitions, 12906 flow [2024-06-28 03:55:01,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 578 transitions, 12742 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-28 03:55:01,197 INFO L231 Difference]: Finished difference. Result has 238 places, 530 transitions, 11755 flow [2024-06-28 03:55:01,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11224, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11755, PETRI_PLACES=238, PETRI_TRANSITIONS=530} [2024-06-28 03:55:01,198 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 197 predicate places. [2024-06-28 03:55:01,198 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 530 transitions, 11755 flow [2024-06-28 03:55:01,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:01,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:55:01,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:55:01,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 03:55:01,199 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:55:01,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:55:01,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1718827370, now seen corresponding path program 1 times [2024-06-28 03:55:01,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:55:01,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517115126] [2024-06-28 03:55:01,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:55:01,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:55:01,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:55:02,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:55:02,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:55:02,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517115126] [2024-06-28 03:55:02,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517115126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:55:02,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:55:02,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:55:02,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661179794] [2024-06-28 03:55:02,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:55:02,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:55:02,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:55:02,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:55:02,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:55:02,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 03:55:02,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 530 transitions, 11755 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:02,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:55:02,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 03:55:02,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:55:04,549 INFO L124 PetriNetUnfolderBase]: 6521/10129 cut-off events. [2024-06-28 03:55:04,550 INFO L125 PetriNetUnfolderBase]: For 395926/395987 co-relation queries the response was YES. [2024-06-28 03:55:04,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86120 conditions, 10129 events. 6521/10129 cut-off events. For 395926/395987 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 64440 event pairs, 1775 based on Foata normal form. 58/10187 useless extension candidates. Maximal degree in co-relation 86006. Up to 8756 conditions per place. [2024-06-28 03:55:04,672 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 340 selfloop transitions, 227 changer transitions 0/570 dead transitions. [2024-06-28 03:55:04,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 570 transitions, 13144 flow [2024-06-28 03:55:04,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:55:04,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:55:04,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-28 03:55:04,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4388888888888889 [2024-06-28 03:55:04,674 INFO L175 Difference]: Start difference. First operand has 238 places, 530 transitions, 11755 flow. Second operand 9 states and 158 transitions. [2024-06-28 03:55:04,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 570 transitions, 13144 flow [2024-06-28 03:55:05,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 570 transitions, 12679 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-28 03:55:05,567 INFO L231 Difference]: Finished difference. Result has 240 places, 533 transitions, 11837 flow [2024-06-28 03:55:05,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11290, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11837, PETRI_PLACES=240, PETRI_TRANSITIONS=533} [2024-06-28 03:55:05,568 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 199 predicate places. [2024-06-28 03:55:05,568 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 533 transitions, 11837 flow [2024-06-28 03:55:05,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:05,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:55:05,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:55:05,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 03:55:05,569 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:55:05,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:55:05,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1718819930, now seen corresponding path program 2 times [2024-06-28 03:55:05,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:55:05,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971555594] [2024-06-28 03:55:05,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:55:05,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:55:05,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:55:06,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:55:06,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:55:06,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971555594] [2024-06-28 03:55:06,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971555594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:55:06,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:55:06,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:55:06,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486427344] [2024-06-28 03:55:06,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:55:06,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:55:06,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:55:06,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:55:06,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:55:06,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 03:55:06,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 533 transitions, 11837 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:06,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:55:06,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 03:55:06,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:55:08,868 INFO L124 PetriNetUnfolderBase]: 6694/10414 cut-off events. [2024-06-28 03:55:08,868 INFO L125 PetriNetUnfolderBase]: For 419478/419539 co-relation queries the response was YES. [2024-06-28 03:55:08,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88434 conditions, 10414 events. 6694/10414 cut-off events. For 419478/419539 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 66781 event pairs, 1730 based on Foata normal form. 58/10472 useless extension candidates. Maximal degree in co-relation 88319. Up to 8238 conditions per place. [2024-06-28 03:55:09,015 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 339 selfloop transitions, 243 changer transitions 0/585 dead transitions. [2024-06-28 03:55:09,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 585 transitions, 13452 flow [2024-06-28 03:55:09,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:55:09,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:55:09,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-28 03:55:09,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4527777777777778 [2024-06-28 03:55:09,017 INFO L175 Difference]: Start difference. First operand has 240 places, 533 transitions, 11837 flow. Second operand 9 states and 163 transitions. [2024-06-28 03:55:09,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 585 transitions, 13452 flow [2024-06-28 03:55:09,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 585 transitions, 13016 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-28 03:55:09,995 INFO L231 Difference]: Finished difference. Result has 245 places, 543 transitions, 12125 flow [2024-06-28 03:55:09,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11401, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=235, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12125, PETRI_PLACES=245, PETRI_TRANSITIONS=543} [2024-06-28 03:55:09,996 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 204 predicate places. [2024-06-28 03:55:09,996 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 543 transitions, 12125 flow [2024-06-28 03:55:09,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:09,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:55:09,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:55:09,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 03:55:09,997 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:55:09,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:55:09,998 INFO L85 PathProgramCache]: Analyzing trace with hash 251432530, now seen corresponding path program 6 times [2024-06-28 03:55:09,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:55:09,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770891787] [2024-06-28 03:55:09,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:55:09,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:55:10,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:55:10,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:55:10,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:55:10,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770891787] [2024-06-28 03:55:10,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770891787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:55:10,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:55:10,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:55:10,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880223216] [2024-06-28 03:55:10,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:55:10,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:55:10,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:55:10,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:55:10,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:55:11,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 03:55:11,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 543 transitions, 12125 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:11,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:55:11,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 03:55:11,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:55:13,314 INFO L124 PetriNetUnfolderBase]: 6790/10535 cut-off events. [2024-06-28 03:55:13,315 INFO L125 PetriNetUnfolderBase]: For 452095/452135 co-relation queries the response was YES. [2024-06-28 03:55:13,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90507 conditions, 10535 events. 6790/10535 cut-off events. For 452095/452135 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 67169 event pairs, 1446 based on Foata normal form. 60/10595 useless extension candidates. Maximal degree in co-relation 90390. Up to 4965 conditions per place. [2024-06-28 03:55:13,470 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 290 selfloop transitions, 303 changer transitions 0/596 dead transitions. [2024-06-28 03:55:13,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 596 transitions, 13796 flow [2024-06-28 03:55:13,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:55:13,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:55:13,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-28 03:55:13,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45555555555555555 [2024-06-28 03:55:13,471 INFO L175 Difference]: Start difference. First operand has 245 places, 543 transitions, 12125 flow. Second operand 9 states and 164 transitions. [2024-06-28 03:55:13,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 596 transitions, 13796 flow [2024-06-28 03:55:14,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 596 transitions, 13473 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-28 03:55:14,649 INFO L231 Difference]: Finished difference. Result has 250 places, 546 transitions, 12516 flow [2024-06-28 03:55:14,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11804, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=300, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12516, PETRI_PLACES=250, PETRI_TRANSITIONS=546} [2024-06-28 03:55:14,650 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 209 predicate places. [2024-06-28 03:55:14,650 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 546 transitions, 12516 flow [2024-06-28 03:55:14,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:14,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:55:14,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:55:14,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 03:55:14,651 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:55:14,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:55:14,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1813594474, now seen corresponding path program 7 times [2024-06-28 03:55:14,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:55:14,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020853397] [2024-06-28 03:55:14,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:55:14,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:55:14,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:55:15,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:55:15,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:55:15,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020853397] [2024-06-28 03:55:15,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020853397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:55:15,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:55:15,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:55:15,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564422672] [2024-06-28 03:55:15,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:55:15,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:55:15,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:55:15,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:55:15,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:55:15,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 03:55:15,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 546 transitions, 12516 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:15,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:55:15,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 03:55:15,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:55:18,157 INFO L124 PetriNetUnfolderBase]: 7179/11197 cut-off events. [2024-06-28 03:55:18,158 INFO L125 PetriNetUnfolderBase]: For 525559/525603 co-relation queries the response was YES. [2024-06-28 03:55:18,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98332 conditions, 11197 events. 7179/11197 cut-off events. For 525559/525603 co-relation queries the response was YES. Maximal size of possible extension queue 646. Compared 73065 event pairs, 1819 based on Foata normal form. 72/11269 useless extension candidates. Maximal degree in co-relation 98212. Up to 7899 conditions per place. [2024-06-28 03:55:18,300 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 328 selfloop transitions, 279 changer transitions 0/610 dead transitions. [2024-06-28 03:55:18,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 610 transitions, 14427 flow [2024-06-28 03:55:18,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:55:18,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:55:18,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-28 03:55:18,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455 [2024-06-28 03:55:18,302 INFO L175 Difference]: Start difference. First operand has 250 places, 546 transitions, 12516 flow. Second operand 10 states and 182 transitions. [2024-06-28 03:55:18,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 610 transitions, 14427 flow [2024-06-28 03:55:19,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 610 transitions, 14040 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-28 03:55:19,572 INFO L231 Difference]: Finished difference. Result has 257 places, 554 transitions, 13015 flow [2024-06-28 03:55:19,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12139, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13015, PETRI_PLACES=257, PETRI_TRANSITIONS=554} [2024-06-28 03:55:19,573 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 216 predicate places. [2024-06-28 03:55:19,573 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 554 transitions, 13015 flow [2024-06-28 03:55:19,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:19,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:55:19,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:55:19,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 03:55:19,574 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:55:19,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:55:19,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1726754794, now seen corresponding path program 8 times [2024-06-28 03:55:19,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:55:19,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14397382] [2024-06-28 03:55:19,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:55:19,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:55:19,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:55:20,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:55:20,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:55:20,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14397382] [2024-06-28 03:55:20,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14397382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:55:20,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:55:20,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:55:20,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673791177] [2024-06-28 03:55:20,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:55:20,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:55:20,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:55:20,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:55:20,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:55:20,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 03:55:20,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 554 transitions, 13015 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:20,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:55:20,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 03:55:20,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:55:23,365 INFO L124 PetriNetUnfolderBase]: 7238/11336 cut-off events. [2024-06-28 03:55:23,365 INFO L125 PetriNetUnfolderBase]: For 537586/537645 co-relation queries the response was YES. [2024-06-28 03:55:23,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99088 conditions, 11336 events. 7238/11336 cut-off events. For 537586/537645 co-relation queries the response was YES. Maximal size of possible extension queue 658. Compared 74753 event pairs, 2003 based on Foata normal form. 92/11428 useless extension candidates. Maximal degree in co-relation 98966. Up to 8788 conditions per place. [2024-06-28 03:55:23,522 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 342 selfloop transitions, 254 changer transitions 0/599 dead transitions. [2024-06-28 03:55:23,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 599 transitions, 14548 flow [2024-06-28 03:55:23,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:55:23,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:55:23,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-28 03:55:23,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-28 03:55:23,524 INFO L175 Difference]: Start difference. First operand has 257 places, 554 transitions, 13015 flow. Second operand 9 states and 159 transitions. [2024-06-28 03:55:23,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 599 transitions, 14548 flow [2024-06-28 03:55:24,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 599 transitions, 14186 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-28 03:55:24,879 INFO L231 Difference]: Finished difference. Result has 261 places, 557 transitions, 13315 flow [2024-06-28 03:55:24,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12655, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13315, PETRI_PLACES=261, PETRI_TRANSITIONS=557} [2024-06-28 03:55:24,880 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 220 predicate places. [2024-06-28 03:55:24,880 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 557 transitions, 13315 flow [2024-06-28 03:55:24,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:24,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:55:24,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:55:24,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 03:55:24,880 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:55:24,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:55:24,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1847123606, now seen corresponding path program 9 times [2024-06-28 03:55:24,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:55:24,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852705616] [2024-06-28 03:55:24,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:55:24,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:55:24,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:55:25,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:55:25,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:55:25,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852705616] [2024-06-28 03:55:25,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852705616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:55:25,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:55:25,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:55:25,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514717950] [2024-06-28 03:55:25,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:55:25,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:55:25,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:55:25,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:55:25,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:55:25,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 03:55:25,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 557 transitions, 13315 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:25,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:55:25,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 03:55:25,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:55:29,381 INFO L124 PetriNetUnfolderBase]: 7570/11854 cut-off events. [2024-06-28 03:55:29,382 INFO L125 PetriNetUnfolderBase]: For 562925/562958 co-relation queries the response was YES. [2024-06-28 03:55:29,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104892 conditions, 11854 events. 7570/11854 cut-off events. For 562925/562958 co-relation queries the response was YES. Maximal size of possible extension queue 693. Compared 78694 event pairs, 1845 based on Foata normal form. 60/11914 useless extension candidates. Maximal degree in co-relation 104769. Up to 8494 conditions per place. [2024-06-28 03:55:29,528 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 344 selfloop transitions, 263 changer transitions 0/610 dead transitions. [2024-06-28 03:55:29,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 610 transitions, 15155 flow [2024-06-28 03:55:29,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:55:29,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:55:29,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-28 03:55:29,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.471875 [2024-06-28 03:55:29,529 INFO L175 Difference]: Start difference. First operand has 261 places, 557 transitions, 13315 flow. Second operand 8 states and 151 transitions. [2024-06-28 03:55:29,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 610 transitions, 15155 flow [2024-06-28 03:55:30,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 610 transitions, 14707 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-28 03:55:30,876 INFO L231 Difference]: Finished difference. Result has 263 places, 563 transitions, 13606 flow [2024-06-28 03:55:30,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12867, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=260, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13606, PETRI_PLACES=263, PETRI_TRANSITIONS=563} [2024-06-28 03:55:30,877 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 222 predicate places. [2024-06-28 03:55:30,877 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 563 transitions, 13606 flow [2024-06-28 03:55:30,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:30,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:55:30,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:55:30,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 03:55:30,878 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:55:30,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:55:30,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1847127326, now seen corresponding path program 10 times [2024-06-28 03:55:30,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:55:30,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108594270] [2024-06-28 03:55:30,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:55:30,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:55:30,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:55:31,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:55:31,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:55:31,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108594270] [2024-06-28 03:55:31,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108594270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:55:31,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:55:31,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:55:31,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282612729] [2024-06-28 03:55:31,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:55:31,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:55:31,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:55:31,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:55:31,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:55:31,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 03:55:31,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 563 transitions, 13606 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:31,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:55:31,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 03:55:31,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:55:35,109 INFO L124 PetriNetUnfolderBase]: 7640/11994 cut-off events. [2024-06-28 03:55:35,109 INFO L125 PetriNetUnfolderBase]: For 589309/589342 co-relation queries the response was YES. [2024-06-28 03:55:35,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105221 conditions, 11994 events. 7640/11994 cut-off events. For 589309/589342 co-relation queries the response was YES. Maximal size of possible extension queue 707. Compared 80441 event pairs, 2286 based on Foata normal form. 88/12082 useless extension candidates. Maximal degree in co-relation 105097. Up to 10042 conditions per place. [2024-06-28 03:55:35,259 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 363 selfloop transitions, 244 changer transitions 0/610 dead transitions. [2024-06-28 03:55:35,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 610 transitions, 15216 flow [2024-06-28 03:55:35,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:55:35,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:55:35,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-28 03:55:35,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.459375 [2024-06-28 03:55:35,261 INFO L175 Difference]: Start difference. First operand has 263 places, 563 transitions, 13606 flow. Second operand 8 states and 147 transitions. [2024-06-28 03:55:35,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 610 transitions, 15216 flow [2024-06-28 03:55:36,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 610 transitions, 14868 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-28 03:55:36,625 INFO L231 Difference]: Finished difference. Result has 266 places, 567 transitions, 13902 flow [2024-06-28 03:55:36,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13266, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13902, PETRI_PLACES=266, PETRI_TRANSITIONS=567} [2024-06-28 03:55:36,626 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 225 predicate places. [2024-06-28 03:55:36,626 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 567 transitions, 13902 flow [2024-06-28 03:55:36,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:36,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:55:36,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:55:36,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 03:55:36,627 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:55:36,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:55:36,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1852841618, now seen corresponding path program 3 times [2024-06-28 03:55:36,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:55:36,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512455881] [2024-06-28 03:55:36,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:55:36,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:55:36,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:55:37,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:55:37,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:55:37,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512455881] [2024-06-28 03:55:37,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512455881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:55:37,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:55:37,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:55:37,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621159404] [2024-06-28 03:55:37,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:55:37,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:55:37,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:55:37,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:55:37,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:55:37,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 03:55:37,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 567 transitions, 13902 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:37,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:55:37,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 03:55:37,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:55:41,113 INFO L124 PetriNetUnfolderBase]: 7690/12089 cut-off events. [2024-06-28 03:55:41,113 INFO L125 PetriNetUnfolderBase]: For 544045/544106 co-relation queries the response was YES. [2024-06-28 03:55:41,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106641 conditions, 12089 events. 7690/12089 cut-off events. For 544045/544106 co-relation queries the response was YES. Maximal size of possible extension queue 721. Compared 81346 event pairs, 2201 based on Foata normal form. 62/12151 useless extension candidates. Maximal degree in co-relation 106516. Up to 10620 conditions per place. [2024-06-28 03:55:41,253 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 359 selfloop transitions, 244 changer transitions 0/606 dead transitions. [2024-06-28 03:55:41,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 606 transitions, 15449 flow [2024-06-28 03:55:41,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:55:41,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:55:41,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-28 03:55:41,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43125 [2024-06-28 03:55:41,255 INFO L175 Difference]: Start difference. First operand has 266 places, 567 transitions, 13902 flow. Second operand 8 states and 138 transitions. [2024-06-28 03:55:41,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 606 transitions, 15449 flow [2024-06-28 03:55:42,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 606 transitions, 14924 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-28 03:55:42,821 INFO L231 Difference]: Finished difference. Result has 268 places, 572 transitions, 14051 flow [2024-06-28 03:55:42,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13377, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=239, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14051, PETRI_PLACES=268, PETRI_TRANSITIONS=572} [2024-06-28 03:55:42,822 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 227 predicate places. [2024-06-28 03:55:42,822 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 572 transitions, 14051 flow [2024-06-28 03:55:42,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:42,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:55:42,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:55:42,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 03:55:42,822 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:55:42,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:55:42,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1852849058, now seen corresponding path program 4 times [2024-06-28 03:55:42,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:55:42,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941031621] [2024-06-28 03:55:42,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:55:42,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:55:42,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:55:43,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:55:43,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:55:43,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941031621] [2024-06-28 03:55:43,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941031621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:55:43,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:55:43,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:55:43,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667752499] [2024-06-28 03:55:43,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:55:43,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:55:43,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:55:43,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:55:43,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:55:43,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 03:55:43,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 572 transitions, 14051 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:43,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:55:43,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 03:55:43,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:55:47,145 INFO L124 PetriNetUnfolderBase]: 7729/12158 cut-off events. [2024-06-28 03:55:47,146 INFO L125 PetriNetUnfolderBase]: For 561052/561113 co-relation queries the response was YES. [2024-06-28 03:55:47,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107269 conditions, 12158 events. 7729/12158 cut-off events. For 561052/561113 co-relation queries the response was YES. Maximal size of possible extension queue 723. Compared 82015 event pairs, 2096 based on Foata normal form. 60/12218 useless extension candidates. Maximal degree in co-relation 107143. Up to 9201 conditions per place. [2024-06-28 03:55:47,312 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 335 selfloop transitions, 273 changer transitions 0/611 dead transitions. [2024-06-28 03:55:47,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 611 transitions, 15557 flow [2024-06-28 03:55:47,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:55:47,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:55:47,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-28 03:55:47,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44375 [2024-06-28 03:55:47,314 INFO L175 Difference]: Start difference. First operand has 268 places, 572 transitions, 14051 flow. Second operand 8 states and 142 transitions. [2024-06-28 03:55:47,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 611 transitions, 15557 flow [2024-06-28 03:55:48,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 611 transitions, 14984 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-28 03:55:48,920 INFO L231 Difference]: Finished difference. Result has 270 places, 576 transitions, 14172 flow [2024-06-28 03:55:48,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13478, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14172, PETRI_PLACES=270, PETRI_TRANSITIONS=576} [2024-06-28 03:55:48,921 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 229 predicate places. [2024-06-28 03:55:48,921 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 576 transitions, 14172 flow [2024-06-28 03:55:48,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:48,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:55:48,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:55:48,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-28 03:55:48,921 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:55:48,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:55:48,922 INFO L85 PathProgramCache]: Analyzing trace with hash -941809562, now seen corresponding path program 5 times [2024-06-28 03:55:48,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:55:48,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740415128] [2024-06-28 03:55:48,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:55:48,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:55:48,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:55:49,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:55:49,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:55:49,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740415128] [2024-06-28 03:55:49,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740415128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:55:49,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:55:49,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:55:49,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142568661] [2024-06-28 03:55:49,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:55:49,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:55:49,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:55:49,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:55:49,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:55:49,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 03:55:49,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 576 transitions, 14172 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:49,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:55:49,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 03:55:49,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:55:53,218 INFO L124 PetriNetUnfolderBase]: 7721/12094 cut-off events. [2024-06-28 03:55:53,219 INFO L125 PetriNetUnfolderBase]: For 569816/569820 co-relation queries the response was YES. [2024-06-28 03:55:53,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107899 conditions, 12094 events. 7721/12094 cut-off events. For 569816/569820 co-relation queries the response was YES. Maximal size of possible extension queue 716. Compared 80679 event pairs, 3344 based on Foata normal form. 8/12102 useless extension candidates. Maximal degree in co-relation 107772. Up to 11850 conditions per place. [2024-06-28 03:55:53,389 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 581 selfloop transitions, 19 changer transitions 0/603 dead transitions. [2024-06-28 03:55:53,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 603 transitions, 15496 flow [2024-06-28 03:55:53,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:55:53,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:55:53,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-28 03:55:53,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.390625 [2024-06-28 03:55:53,391 INFO L175 Difference]: Start difference. First operand has 270 places, 576 transitions, 14172 flow. Second operand 8 states and 125 transitions. [2024-06-28 03:55:53,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 603 transitions, 15496 flow [2024-06-28 03:55:54,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 603 transitions, 14871 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-28 03:55:54,979 INFO L231 Difference]: Finished difference. Result has 272 places, 578 transitions, 13638 flow [2024-06-28 03:55:54,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13547, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13638, PETRI_PLACES=272, PETRI_TRANSITIONS=578} [2024-06-28 03:55:54,980 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 231 predicate places. [2024-06-28 03:55:54,980 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 578 transitions, 13638 flow [2024-06-28 03:55:54,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:54,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:55:54,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:55:54,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-28 03:55:54,980 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:55:54,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:55:54,981 INFO L85 PathProgramCache]: Analyzing trace with hash -951013772, now seen corresponding path program 6 times [2024-06-28 03:55:54,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:55:54,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823382994] [2024-06-28 03:55:54,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:55:54,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:55:54,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:55:56,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:55:56,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:55:56,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823382994] [2024-06-28 03:55:56,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823382994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:55:56,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:55:56,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:55:56,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002239773] [2024-06-28 03:55:56,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:55:56,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:55:56,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:55:56,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:55:56,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:55:56,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 03:55:56,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 578 transitions, 13638 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:56,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:55:56,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 03:55:56,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:55:59,326 INFO L124 PetriNetUnfolderBase]: 7698/12083 cut-off events. [2024-06-28 03:55:59,326 INFO L125 PetriNetUnfolderBase]: For 572324/572328 co-relation queries the response was YES. [2024-06-28 03:55:59,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105934 conditions, 12083 events. 7698/12083 cut-off events. For 572324/572328 co-relation queries the response was YES. Maximal size of possible extension queue 718. Compared 81108 event pairs, 3357 based on Foata normal form. 14/12097 useless extension candidates. Maximal degree in co-relation 105806. Up to 11715 conditions per place. [2024-06-28 03:55:59,500 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 554 selfloop transitions, 55 changer transitions 0/612 dead transitions. [2024-06-28 03:55:59,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 612 transitions, 15187 flow [2024-06-28 03:55:59,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:55:59,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:55:59,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-28 03:55:59,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396875 [2024-06-28 03:55:59,501 INFO L175 Difference]: Start difference. First operand has 272 places, 578 transitions, 13638 flow. Second operand 8 states and 127 transitions. [2024-06-28 03:55:59,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 612 transitions, 15187 flow [2024-06-28 03:56:01,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 612 transitions, 15114 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-28 03:56:01,116 INFO L231 Difference]: Finished difference. Result has 274 places, 583 transitions, 13873 flow [2024-06-28 03:56:01,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13565, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13873, PETRI_PLACES=274, PETRI_TRANSITIONS=583} [2024-06-28 03:56:01,117 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 233 predicate places. [2024-06-28 03:56:01,117 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 583 transitions, 13873 flow [2024-06-28 03:56:01,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:01,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:56:01,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:56:01,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-28 03:56:01,117 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:56:01,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:56:01,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1200357002, now seen corresponding path program 7 times [2024-06-28 03:56:01,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:56:01,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990562509] [2024-06-28 03:56:01,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:56:01,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:56:01,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:56:02,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:56:02,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:56:02,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990562509] [2024-06-28 03:56:02,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990562509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:56:02,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:56:02,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:56:02,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955912846] [2024-06-28 03:56:02,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:56:02,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:56:02,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:56:02,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:56:02,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:56:02,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-28 03:56:02,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 583 transitions, 13873 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:02,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:56:02,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-28 03:56:02,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:56:05,353 INFO L124 PetriNetUnfolderBase]: 7680/12055 cut-off events. [2024-06-28 03:56:05,353 INFO L125 PetriNetUnfolderBase]: For 583718/583722 co-relation queries the response was YES. [2024-06-28 03:56:05,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105996 conditions, 12055 events. 7680/12055 cut-off events. For 583718/583722 co-relation queries the response was YES. Maximal size of possible extension queue 715. Compared 80945 event pairs, 3338 based on Foata normal form. 12/12067 useless extension candidates. Maximal degree in co-relation 105867. Up to 11545 conditions per place.