./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix024_power.oepc_pso.oepc_rmo.oepc_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix024_power.oepc_pso.oepc_rmo.oepc_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f 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/mix024_power.oepc_pso.oepc_rmo.oepc_tso.oepc_tso.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix024_power.oepc_pso.oepc_rmo.oepc_tso.oepc_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-04 14:55:52,679 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-04 14:55:52,727 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-04 14:55:52,730 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-04 14:55:52,730 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-04 14:55:52,743 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-04 14:55:52,743 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-04 14:55:52,744 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-04 14:55:52,746 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-04 14:55:52,749 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-04 14:55:52,750 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-04 14:55:52,750 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-04 14:55:52,750 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-04 14:55:52,751 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-04 14:55:52,751 INFO L153 SettingsManager]: * Use SBE=true [2024-06-04 14:55:52,752 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-04 14:55:52,752 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-04 14:55:52,752 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-04 14:55:52,752 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-04 14:55:52,752 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-04 14:55:52,752 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-04 14:55:52,753 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-04 14:55:52,753 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-04 14:55:52,753 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-04 14:55:52,753 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-04 14:55:52,753 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-04 14:55:52,753 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-04 14:55:52,753 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-04 14:55:52,754 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-04 14:55:52,754 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-04 14:55:52,755 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-04 14:55:52,755 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-04 14:55:52,755 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 14:55:52,755 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-04 14:55:52,755 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-04 14:55:52,755 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-04 14:55:52,755 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-04 14:55:52,756 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-04 14:55:52,756 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-04 14:55:52,756 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-04 14:55:52,756 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-04 14:55:52,756 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-04 14:55:52,756 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-04 14:55:52,756 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-04 14:55:52,917 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-04 14:55:52,933 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-04 14:55:52,935 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-04 14:55:52,936 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-04 14:55:52,936 INFO L274 PluginConnector]: CDTParser initialized [2024-06-04 14:55:52,937 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix024_power.oepc_pso.oepc_rmo.oepc_tso.oepc_tso.opt.i [2024-06-04 14:55:53,956 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-04 14:55:54,176 INFO L384 CDTParser]: Found 1 translation units. [2024-06-04 14:55:54,177 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix024_power.oepc_pso.oepc_rmo.oepc_tso.oepc_tso.opt.i [2024-06-04 14:55:54,189 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2389d88b6/96f78bda40d7490b9b0759d16fea121f/FLAG1984f8a9a [2024-06-04 14:55:54,203 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2389d88b6/96f78bda40d7490b9b0759d16fea121f [2024-06-04 14:55:54,205 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-04 14:55:54,206 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-04 14:55:54,208 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix024_power.oepc_pso.oepc_rmo.oepc_tso.oepc_tso.opt.yml/witness.yml [2024-06-04 14:55:54,377 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-04 14:55:54,379 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-04 14:55:54,381 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-04 14:55:54,381 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-04 14:55:54,413 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-04 14:55:54,413 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 02:55:54" (1/2) ... [2024-06-04 14:55:54,414 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@429dad80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:55:54, skipping insertion in model container [2024-06-04 14:55:54,414 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 02:55:54" (1/2) ... [2024-06-04 14:55:54,416 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6c15082c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:55:54, skipping insertion in model container [2024-06-04 14:55:54,416 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:55:54" (2/2) ... [2024-06-04 14:55:54,416 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@429dad80 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:55:54, skipping insertion in model container [2024-06-04 14:55:54,417 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:55:54" (2/2) ... [2024-06-04 14:55:54,417 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-04 14:55:54,484 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-04 14:55:54,485 INFO L97 edCorrectnessWitness]: Location invariant before [L853-L853] ((((((((((((((((((((! multithreaded || a$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) [2024-06-04 14:55:54,485 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] ((((((((((((((((((((! multithreaded || a$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) [2024-06-04 14:55:54,486 INFO L97 edCorrectnessWitness]: Location invariant before [L851-L851] ((((((((((((((((((((! multithreaded || a$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) [2024-06-04 14:55:54,486 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-04 14:55:54,486 INFO L106 edCorrectnessWitness]: ghost_update [L849-L849] multithreaded = 1; [2024-06-04 14:55:54,521 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-04 14:55:54,852 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 14:55:54,861 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-04 14:55:54,951 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 14:55:54,980 INFO L206 MainTranslator]: Completed translation [2024-06-04 14:55:54,980 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:55:54 WrapperNode [2024-06-04 14:55:54,980 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-04 14:55:54,981 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-04 14:55:54,981 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-04 14:55:54,981 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-04 14:55:54,986 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 04.06 02:55:54" (1/1) ... [2024-06-04 14:55:54,997 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 04.06 02:55:54" (1/1) ... [2024-06-04 14:55:55,022 INFO L138 Inliner]: procedures = 175, calls = 49, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 134 [2024-06-04 14:55:55,022 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-04 14:55:55,023 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-04 14:55:55,023 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-04 14:55:55,023 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-04 14:55:55,031 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:55:54" (1/1) ... [2024-06-04 14:55:55,031 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:55:54" (1/1) ... [2024-06-04 14:55:55,033 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:55:54" (1/1) ... [2024-06-04 14:55:55,045 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]. [2024-06-04 14:55:55,046 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:55:54" (1/1) ... [2024-06-04 14:55:55,046 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:55:54" (1/1) ... [2024-06-04 14:55:55,055 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:55:54" (1/1) ... [2024-06-04 14:55:55,056 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:55:54" (1/1) ... [2024-06-04 14:55:55,058 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:55:54" (1/1) ... [2024-06-04 14:55:55,060 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:55:54" (1/1) ... [2024-06-04 14:55:55,062 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-04 14:55:55,063 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-04 14:55:55,063 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-04 14:55:55,063 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-04 14:55:55,063 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:55:54" (1/1) ... [2024-06-04 14:55:55,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 14:55:55,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 14:55:55,110 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) [2024-06-04 14:55:55,132 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 [2024-06-04 14:55:55,145 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-04 14:55:55,145 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-04 14:55:55,145 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-04 14:55:55,145 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-04 14:55:55,145 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-04 14:55:55,146 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-04 14:55:55,146 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-04 14:55:55,146 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-04 14:55:55,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-04 14:55:55,146 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-04 14:55:55,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-04 14:55:55,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-04 14:55:55,148 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-04 14:55:55,267 INFO L244 CfgBuilder]: Building ICFG [2024-06-04 14:55:55,269 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-04 14:55:55,524 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-04 14:55:55,524 INFO L293 CfgBuilder]: Performing block encoding [2024-06-04 14:55:55,647 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-04 14:55:55,647 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-04 14:55:55,648 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 02:55:55 BoogieIcfgContainer [2024-06-04 14:55:55,648 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-04 14:55:55,649 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-04 14:55:55,662 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-04 14:55:55,665 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-04 14:55:55,665 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 02:55:54" (1/4) ... [2024-06-04 14:55:55,666 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@720e8f73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 02:55:55, skipping insertion in model container [2024-06-04 14:55:55,666 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:55:54" (2/4) ... [2024-06-04 14:55:55,666 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@720e8f73 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 02:55:55, skipping insertion in model container [2024-06-04 14:55:55,666 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:55:54" (3/4) ... [2024-06-04 14:55:55,666 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@720e8f73 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 02:55:55, skipping insertion in model container [2024-06-04 14:55:55,667 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 02:55:55" (4/4) ... [2024-06-04 14:55:55,667 INFO L112 eAbstractionObserver]: Analyzing ICFG mix024_power.oepc_pso.oepc_rmo.oepc_tso.oepc_tso.opt.i [2024-06-04 14:55:55,681 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-04 14:55:55,681 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-04 14:55:55,681 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-04 14:55:55,722 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-04 14:55:55,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 44 transitions, 100 flow [2024-06-04 14:55:55,776 INFO L124 PetriNetUnfolderBase]: 0/41 cut-off events. [2024-06-04 14:55:55,776 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 14:55:55,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 41 events. 0/41 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 73 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-04 14:55:55,778 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 44 transitions, 100 flow [2024-06-04 14:55:55,782 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 35 transitions, 79 flow [2024-06-04 14:55:55,795 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-04 14:55:55,824 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;@3f553379, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-04 14:55:55,824 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-04 14:55:55,827 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-04 14:55:55,827 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-04 14:55:55,827 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 14:55:55,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:55,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-04 14:55:55,828 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)] === [2024-06-04 14:55:55,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:55,832 INFO L85 PathProgramCache]: Analyzing trace with hash -971387301, now seen corresponding path program 1 times [2024-06-04 14:55:55,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:55,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397582474] [2024-06-04 14:55:55,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:55,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:55,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:56,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:56,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:56,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397582474] [2024-06-04 14:55:56,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397582474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:56,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:56,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-04 14:55:56,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607589508] [2024-06-04 14:55:56,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:56,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 14:55:56,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:57,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 14:55:57,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 14:55:57,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-04 14:55:57,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 35 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:57,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:57,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-04 14:55:57,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:57,437 INFO L124 PetriNetUnfolderBase]: 1659/2554 cut-off events. [2024-06-04 14:55:57,437 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2024-06-04 14:55:57,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5120 conditions, 2554 events. 1659/2554 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 12710 event pairs, 1184 based on Foata normal form. 1/2510 useless extension candidates. Maximal degree in co-relation 5105. Up to 2465 conditions per place. [2024-06-04 14:55:57,458 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 35 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-04 14:55:57,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 183 flow [2024-06-04 14:55:57,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 14:55:57,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 14:55:57,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 78 transitions. [2024-06-04 14:55:57,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-06-04 14:55:57,469 INFO L175 Difference]: Start difference. First operand has 45 places, 35 transitions, 79 flow. Second operand 3 states and 78 transitions. [2024-06-04 14:55:57,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 183 flow [2024-06-04 14:55:57,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 178 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-04 14:55:57,475 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 106 flow [2024-06-04 14:55:57,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-04 14:55:57,479 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2024-06-04 14:55:57,480 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 106 flow [2024-06-04 14:55:57,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:57,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:57,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:57,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-04 14:55:57,480 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)] === [2024-06-04 14:55:57,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:57,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1495254150, now seen corresponding path program 1 times [2024-06-04 14:55:57,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:57,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335393888] [2024-06-04 14:55:57,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:57,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:57,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:58,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:58,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:58,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335393888] [2024-06-04 14:55:58,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335393888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:58,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:58,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 14:55:58,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533621823] [2024-06-04 14:55:58,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:58,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 14:55:58,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:58,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 14:55:58,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-04 14:55:58,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-04 14:55:58,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:58,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:58,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-04 14:55:58,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:58,687 INFO L124 PetriNetUnfolderBase]: 1653/2545 cut-off events. [2024-06-04 14:55:58,688 INFO L125 PetriNetUnfolderBase]: For 467/467 co-relation queries the response was YES. [2024-06-04 14:55:58,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5736 conditions, 2545 events. 1653/2545 cut-off events. For 467/467 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 12678 event pairs, 1038 based on Foata normal form. 3/2543 useless extension candidates. Maximal degree in co-relation 5721. Up to 2441 conditions per place. [2024-06-04 14:55:58,700 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 42 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-04 14:55:58,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 55 transitions, 250 flow [2024-06-04 14:55:58,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 14:55:58,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 14:55:58,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-06-04 14:55:58,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-04 14:55:58,704 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 106 flow. Second operand 4 states and 100 transitions. [2024-06-04 14:55:58,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 55 transitions, 250 flow [2024-06-04 14:55:58,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 55 transitions, 246 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-04 14:55:58,707 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 142 flow [2024-06-04 14:55:58,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-06-04 14:55:58,708 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2024-06-04 14:55:58,708 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 142 flow [2024-06-04 14:55:58,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:58,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:55:58,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:55:58,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-04 14:55:58,711 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)] === [2024-06-04 14:55:58,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:55:58,711 INFO L85 PathProgramCache]: Analyzing trace with hash 891762882, now seen corresponding path program 1 times [2024-06-04 14:55:58,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:55:58,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086946948] [2024-06-04 14:55:58,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:55:58,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:55:58,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:55:59,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:55:59,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:55:59,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086946948] [2024-06-04 14:55:59,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086946948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:55:59,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:55:59,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 14:55:59,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727400736] [2024-06-04 14:55:59,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:55:59,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 14:55:59,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:55:59,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 14:55:59,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-04 14:55:59,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-04 14:55:59,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 142 flow. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:55:59,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:55:59,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-04 14:55:59,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:55:59,999 INFO L124 PetriNetUnfolderBase]: 1947/2974 cut-off events. [2024-06-04 14:55:59,999 INFO L125 PetriNetUnfolderBase]: For 1495/1495 co-relation queries the response was YES. [2024-06-04 14:56:00,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7389 conditions, 2974 events. 1947/2974 cut-off events. For 1495/1495 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14629 event pairs, 1135 based on Foata normal form. 3/2975 useless extension candidates. Maximal degree in co-relation 7372. Up to 2853 conditions per place. [2024-06-04 14:56:00,041 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 50 selfloop transitions, 10 changer transitions 0/65 dead transitions. [2024-06-04 14:56:00,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 65 transitions, 330 flow [2024-06-04 14:56:00,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:56:00,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:56:00,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-04 14:56:00,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5363636363636364 [2024-06-04 14:56:00,044 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 142 flow. Second operand 5 states and 118 transitions. [2024-06-04 14:56:00,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 65 transitions, 330 flow [2024-06-04 14:56:00,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 65 transitions, 316 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-04 14:56:00,046 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 178 flow [2024-06-04 14:56:00,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=178, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-06-04 14:56:00,047 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 6 predicate places. [2024-06-04 14:56:00,047 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 178 flow [2024-06-04 14:56:00,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:00,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:00,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:00,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-04 14:56:00,048 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)] === [2024-06-04 14:56:00,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:00,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1874846873, now seen corresponding path program 1 times [2024-06-04 14:56:00,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:00,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818666414] [2024-06-04 14:56:00,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:00,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:00,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:00,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:00,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:00,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818666414] [2024-06-04 14:56:00,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818666414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:00,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:00,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:56:00,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056778947] [2024-06-04 14:56:00,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:00,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:56:00,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:00,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:56:00,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:56:01,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-04 14:56:01,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 178 flow. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 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) [2024-06-04 14:56:01,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:01,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-04 14:56:01,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:01,472 INFO L124 PetriNetUnfolderBase]: 1941/2941 cut-off events. [2024-06-04 14:56:01,472 INFO L125 PetriNetUnfolderBase]: For 2827/2827 co-relation queries the response was YES. [2024-06-04 14:56:01,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8028 conditions, 2941 events. 1941/2941 cut-off events. For 2827/2827 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14410 event pairs, 989 based on Foata normal form. 3/2942 useless extension candidates. Maximal degree in co-relation 8010. Up to 2829 conditions per place. [2024-06-04 14:56:01,488 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 57 selfloop transitions, 13 changer transitions 0/75 dead transitions. [2024-06-04 14:56:01,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 75 transitions, 408 flow [2024-06-04 14:56:01,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:56:01,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:56:01,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-04 14:56:01,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5265151515151515 [2024-06-04 14:56:01,490 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 178 flow. Second operand 6 states and 139 transitions. [2024-06-04 14:56:01,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 75 transitions, 408 flow [2024-06-04 14:56:01,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 75 transitions, 384 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-04 14:56:01,493 INFO L231 Difference]: Finished difference. Result has 54 places, 47 transitions, 214 flow [2024-06-04 14:56:01,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=214, PETRI_PLACES=54, PETRI_TRANSITIONS=47} [2024-06-04 14:56:01,494 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 9 predicate places. [2024-06-04 14:56:01,494 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 47 transitions, 214 flow [2024-06-04 14:56:01,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 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) [2024-06-04 14:56:01,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:01,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:01,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-04 14:56:01,494 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:56:01,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:01,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1535487544, now seen corresponding path program 1 times [2024-06-04 14:56:01,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:01,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819151715] [2024-06-04 14:56:01,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:01,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:01,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:02,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:02,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:02,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819151715] [2024-06-04 14:56:02,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819151715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:02,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:02,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:56:02,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707747118] [2024-06-04 14:56:02,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:02,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:56:02,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:02,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:56:02,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:56:02,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:56:02,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 47 transitions, 214 flow. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:02,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:02,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:56:02,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:02,666 INFO L124 PetriNetUnfolderBase]: 2135/3308 cut-off events. [2024-06-04 14:56:02,666 INFO L125 PetriNetUnfolderBase]: For 4911/4911 co-relation queries the response was YES. [2024-06-04 14:56:02,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9577 conditions, 3308 events. 2135/3308 cut-off events. For 4911/4911 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 16531 event pairs, 1193 based on Foata normal form. 2/3308 useless extension candidates. Maximal degree in co-relation 9558. Up to 3145 conditions per place. [2024-06-04 14:56:02,687 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 47 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2024-06-04 14:56:02,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 61 transitions, 368 flow [2024-06-04 14:56:02,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:56:02,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:56:02,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 99 transitions. [2024-06-04 14:56:02,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-04 14:56:02,688 INFO L175 Difference]: Start difference. First operand has 54 places, 47 transitions, 214 flow. Second operand 5 states and 99 transitions. [2024-06-04 14:56:02,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 61 transitions, 368 flow [2024-06-04 14:56:02,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 61 transitions, 334 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-04 14:56:02,692 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 226 flow [2024-06-04 14:56:02,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=226, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2024-06-04 14:56:02,692 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 10 predicate places. [2024-06-04 14:56:02,693 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 226 flow [2024-06-04 14:56:02,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:02,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:02,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:02,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-04 14:56:02,693 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:56:02,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:02,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1170679966, now seen corresponding path program 1 times [2024-06-04 14:56:02,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:02,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560674067] [2024-06-04 14:56:02,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:02,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:02,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:04,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:04,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:04,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560674067] [2024-06-04 14:56:04,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560674067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:04,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:04,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:56:04,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302139329] [2024-06-04 14:56:04,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:04,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:56:04,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:04,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:56:04,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:56:04,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:56:04,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 226 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:04,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:04,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:56:04,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:04,695 INFO L124 PetriNetUnfolderBase]: 2224/3384 cut-off events. [2024-06-04 14:56:04,695 INFO L125 PetriNetUnfolderBase]: For 6864/6864 co-relation queries the response was YES. [2024-06-04 14:56:04,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10526 conditions, 3384 events. 2224/3384 cut-off events. For 6864/6864 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 16536 event pairs, 922 based on Foata normal form. 3/3385 useless extension candidates. Maximal degree in co-relation 10505. Up to 3210 conditions per place. [2024-06-04 14:56:04,718 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 75 selfloop transitions, 19 changer transitions 0/98 dead transitions. [2024-06-04 14:56:04,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 98 transitions, 556 flow [2024-06-04 14:56:04,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:56:04,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:56:04,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-04 14:56:04,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4943181818181818 [2024-06-04 14:56:04,720 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 226 flow. Second operand 8 states and 174 transitions. [2024-06-04 14:56:04,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 98 transitions, 556 flow [2024-06-04 14:56:04,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 98 transitions, 534 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-04 14:56:04,726 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 298 flow [2024-06-04 14:56:04,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=298, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2024-06-04 14:56:04,728 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 16 predicate places. [2024-06-04 14:56:04,728 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 298 flow [2024-06-04 14:56:04,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:04,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:04,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:04,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-04 14:56:04,729 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)] === [2024-06-04 14:56:04,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:04,730 INFO L85 PathProgramCache]: Analyzing trace with hash 355475342, now seen corresponding path program 1 times [2024-06-04 14:56:04,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:04,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603662350] [2024-06-04 14:56:04,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:04,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:04,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:05,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:05,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:05,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603662350] [2024-06-04 14:56:05,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603662350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:05,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:05,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:56:05,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37903344] [2024-06-04 14:56:05,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:05,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:56:05,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:05,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:56:05,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:56:05,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:56:05,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 298 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:05,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:05,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:56:05,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:06,143 INFO L124 PetriNetUnfolderBase]: 2462/3682 cut-off events. [2024-06-04 14:56:06,144 INFO L125 PetriNetUnfolderBase]: For 10921/10921 co-relation queries the response was YES. [2024-06-04 14:56:06,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12496 conditions, 3682 events. 2462/3682 cut-off events. For 10921/10921 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 17515 event pairs, 1038 based on Foata normal form. 6/3686 useless extension candidates. Maximal degree in co-relation 12474. Up to 3562 conditions per place. [2024-06-04 14:56:06,162 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 64 selfloop transitions, 17 changer transitions 0/86 dead transitions. [2024-06-04 14:56:06,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 86 transitions, 588 flow [2024-06-04 14:56:06,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:56:06,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:56:06,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-04 14:56:06,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45075757575757575 [2024-06-04 14:56:06,163 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 298 flow. Second operand 6 states and 119 transitions. [2024-06-04 14:56:06,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 86 transitions, 588 flow [2024-06-04 14:56:06,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 86 transitions, 538 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-04 14:56:06,168 INFO L231 Difference]: Finished difference. Result has 64 places, 67 transitions, 377 flow [2024-06-04 14:56:06,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=377, PETRI_PLACES=64, PETRI_TRANSITIONS=67} [2024-06-04 14:56:06,169 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 19 predicate places. [2024-06-04 14:56:06,169 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 67 transitions, 377 flow [2024-06-04 14:56:06,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:06,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:06,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:06,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-04 14:56:06,170 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)] === [2024-06-04 14:56:06,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:06,170 INFO L85 PathProgramCache]: Analyzing trace with hash -767070121, now seen corresponding path program 1 times [2024-06-04 14:56:06,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:06,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887974049] [2024-06-04 14:56:06,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:06,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:06,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:06,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:06,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:06,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887974049] [2024-06-04 14:56:06,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887974049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:06,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:06,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:56:06,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905045159] [2024-06-04 14:56:06,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:06,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:56:06,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:06,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:56:06,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:56:07,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:56:07,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 67 transitions, 377 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:07,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:07,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:56:07,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:07,544 INFO L124 PetriNetUnfolderBase]: 2201/3426 cut-off events. [2024-06-04 14:56:07,544 INFO L125 PetriNetUnfolderBase]: For 13918/13938 co-relation queries the response was YES. [2024-06-04 14:56:07,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12670 conditions, 3426 events. 2201/3426 cut-off events. For 13918/13938 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 17213 event pairs, 908 based on Foata normal form. 6/3415 useless extension candidates. Maximal degree in co-relation 12644. Up to 3190 conditions per place. [2024-06-04 14:56:07,562 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 68 selfloop transitions, 16 changer transitions 0/93 dead transitions. [2024-06-04 14:56:07,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 93 transitions, 675 flow [2024-06-04 14:56:07,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:56:07,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:56:07,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-04 14:56:07,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2024-06-04 14:56:07,564 INFO L175 Difference]: Start difference. First operand has 64 places, 67 transitions, 377 flow. Second operand 6 states and 123 transitions. [2024-06-04 14:56:07,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 93 transitions, 675 flow [2024-06-04 14:56:07,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 93 transitions, 657 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-04 14:56:07,571 INFO L231 Difference]: Finished difference. Result has 69 places, 73 transitions, 457 flow [2024-06-04 14:56:07,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=457, PETRI_PLACES=69, PETRI_TRANSITIONS=73} [2024-06-04 14:56:07,573 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 24 predicate places. [2024-06-04 14:56:07,574 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 73 transitions, 457 flow [2024-06-04 14:56:07,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:07,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:07,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:07,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-04 14:56:07,574 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:56:07,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:07,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1931341978, now seen corresponding path program 1 times [2024-06-04 14:56:07,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:07,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895113452] [2024-06-04 14:56:07,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:07,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:07,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:09,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:09,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:09,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895113452] [2024-06-04 14:56:09,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895113452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:09,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:09,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:56:09,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548955255] [2024-06-04 14:56:09,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:09,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:56:09,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:09,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:56:09,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:56:09,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:56:09,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 73 transitions, 457 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:09,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:09,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:56:09,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:09,937 INFO L124 PetriNetUnfolderBase]: 2305/3505 cut-off events. [2024-06-04 14:56:09,937 INFO L125 PetriNetUnfolderBase]: For 17078/17092 co-relation queries the response was YES. [2024-06-04 14:56:09,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13646 conditions, 3505 events. 2305/3505 cut-off events. For 17078/17092 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 17168 event pairs, 743 based on Foata normal form. 6/3481 useless extension candidates. Maximal degree in co-relation 13617. Up to 3276 conditions per place. [2024-06-04 14:56:09,956 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 93 selfloop transitions, 21 changer transitions 0/121 dead transitions. [2024-06-04 14:56:09,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 121 transitions, 825 flow [2024-06-04 14:56:09,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:56:09,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:56:09,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-04 14:56:09,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797979797979798 [2024-06-04 14:56:09,957 INFO L175 Difference]: Start difference. First operand has 69 places, 73 transitions, 457 flow. Second operand 9 states and 190 transitions. [2024-06-04 14:56:09,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 121 transitions, 825 flow [2024-06-04 14:56:09,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 121 transitions, 795 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-04 14:56:09,968 INFO L231 Difference]: Finished difference. Result has 75 places, 74 transitions, 500 flow [2024-06-04 14:56:09,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=500, PETRI_PLACES=75, PETRI_TRANSITIONS=74} [2024-06-04 14:56:09,968 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 30 predicate places. [2024-06-04 14:56:09,968 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 74 transitions, 500 flow [2024-06-04 14:56:09,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:09,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:09,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:09,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-04 14:56:09,969 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)] === [2024-06-04 14:56:09,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:09,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1865174441, now seen corresponding path program 2 times [2024-06-04 14:56:09,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:09,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147318312] [2024-06-04 14:56:09,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:09,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:09,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:10,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:10,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:10,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147318312] [2024-06-04 14:56:10,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147318312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:10,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:10,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:56:10,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036887842] [2024-06-04 14:56:10,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:10,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:56:10,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:10,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:56:10,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:56:10,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:56:10,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 74 transitions, 500 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:10,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:10,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:56:10,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:11,287 INFO L124 PetriNetUnfolderBase]: 2199/3397 cut-off events. [2024-06-04 14:56:11,288 INFO L125 PetriNetUnfolderBase]: For 20682/20696 co-relation queries the response was YES. [2024-06-04 14:56:11,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13890 conditions, 3397 events. 2199/3397 cut-off events. For 20682/20696 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 17032 event pairs, 868 based on Foata normal form. 2/3369 useless extension candidates. Maximal degree in co-relation 13860. Up to 3214 conditions per place. [2024-06-04 14:56:11,308 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 69 selfloop transitions, 11 changer transitions 0/89 dead transitions. [2024-06-04 14:56:11,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 89 transitions, 698 flow [2024-06-04 14:56:11,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:56:11,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:56:11,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-04 14:56:11,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4356060606060606 [2024-06-04 14:56:11,310 INFO L175 Difference]: Start difference. First operand has 75 places, 74 transitions, 500 flow. Second operand 6 states and 115 transitions. [2024-06-04 14:56:11,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 89 transitions, 698 flow [2024-06-04 14:56:11,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 89 transitions, 617 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-04 14:56:11,320 INFO L231 Difference]: Finished difference. Result has 74 places, 74 transitions, 449 flow [2024-06-04 14:56:11,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=449, PETRI_PLACES=74, PETRI_TRANSITIONS=74} [2024-06-04 14:56:11,321 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 29 predicate places. [2024-06-04 14:56:11,323 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 74 transitions, 449 flow [2024-06-04 14:56:11,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:11,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:11,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:11,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-04 14:56:11,324 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)] === [2024-06-04 14:56:11,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:11,324 INFO L85 PathProgramCache]: Analyzing trace with hash 2072781109, now seen corresponding path program 1 times [2024-06-04 14:56:11,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:11,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712720888] [2024-06-04 14:56:11,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:11,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:11,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:12,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:12,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:12,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712720888] [2024-06-04 14:56:12,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712720888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:12,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:12,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:56:12,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865553501] [2024-06-04 14:56:12,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:12,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:56:12,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:12,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:56:12,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:56:12,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:56:12,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 74 transitions, 449 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-04 14:56:12,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:12,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:56:12,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:12,735 INFO L124 PetriNetUnfolderBase]: 2313/3517 cut-off events. [2024-06-04 14:56:12,736 INFO L125 PetriNetUnfolderBase]: For 23823/23843 co-relation queries the response was YES. [2024-06-04 14:56:12,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14471 conditions, 3517 events. 2313/3517 cut-off events. For 23823/23843 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 17240 event pairs, 854 based on Foata normal form. 6/3491 useless extension candidates. Maximal degree in co-relation 14439. Up to 3311 conditions per place. [2024-06-04 14:56:12,753 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 76 selfloop transitions, 24 changer transitions 0/107 dead transitions. [2024-06-04 14:56:12,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 107 transitions, 821 flow [2024-06-04 14:56:12,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:56:12,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:56:12,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-04 14:56:12,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4448051948051948 [2024-06-04 14:56:12,755 INFO L175 Difference]: Start difference. First operand has 74 places, 74 transitions, 449 flow. Second operand 7 states and 137 transitions. [2024-06-04 14:56:12,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 107 transitions, 821 flow [2024-06-04 14:56:12,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 107 transitions, 791 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-04 14:56:12,766 INFO L231 Difference]: Finished difference. Result has 76 places, 80 transitions, 545 flow [2024-06-04 14:56:12,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=545, PETRI_PLACES=76, PETRI_TRANSITIONS=80} [2024-06-04 14:56:12,766 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 31 predicate places. [2024-06-04 14:56:12,766 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 80 transitions, 545 flow [2024-06-04 14:56:12,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-04 14:56:12,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:12,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:12,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-04 14:56:12,767 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)] === [2024-06-04 14:56:12,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:12,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1990631511, now seen corresponding path program 2 times [2024-06-04 14:56:12,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:12,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275710390] [2024-06-04 14:56:12,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:12,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:12,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:13,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:13,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:13,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275710390] [2024-06-04 14:56:13,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275710390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:13,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:13,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:56:13,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789382921] [2024-06-04 14:56:13,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:13,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:56:13,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:13,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:56:13,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:56:13,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:56:13,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 80 transitions, 545 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-04 14:56:13,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:13,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:56:13,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:14,054 INFO L124 PetriNetUnfolderBase]: 2324/3533 cut-off events. [2024-06-04 14:56:14,055 INFO L125 PetriNetUnfolderBase]: For 28403/28423 co-relation queries the response was YES. [2024-06-04 14:56:14,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15311 conditions, 3533 events. 2324/3533 cut-off events. For 28403/28423 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 17302 event pairs, 854 based on Foata normal form. 6/3507 useless extension candidates. Maximal degree in co-relation 15278. Up to 3323 conditions per place. [2024-06-04 14:56:14,076 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 74 selfloop transitions, 26 changer transitions 0/107 dead transitions. [2024-06-04 14:56:14,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 107 transitions, 887 flow [2024-06-04 14:56:14,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:56:14,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:56:14,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-04 14:56:14,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4383116883116883 [2024-06-04 14:56:14,077 INFO L175 Difference]: Start difference. First operand has 76 places, 80 transitions, 545 flow. Second operand 7 states and 135 transitions. [2024-06-04 14:56:14,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 107 transitions, 887 flow [2024-06-04 14:56:14,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 107 transitions, 831 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-04 14:56:14,096 INFO L231 Difference]: Finished difference. Result has 80 places, 83 transitions, 587 flow [2024-06-04 14:56:14,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=495, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=587, PETRI_PLACES=80, PETRI_TRANSITIONS=83} [2024-06-04 14:56:14,096 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 35 predicate places. [2024-06-04 14:56:14,096 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 83 transitions, 587 flow [2024-06-04 14:56:14,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-04 14:56:14,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:14,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:14,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-04 14:56:14,097 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)] === [2024-06-04 14:56:14,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:14,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1990631759, now seen corresponding path program 1 times [2024-06-04 14:56:14,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:14,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048242715] [2024-06-04 14:56:14,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:14,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:14,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:14,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:14,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:14,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048242715] [2024-06-04 14:56:14,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048242715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:14,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:14,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:56:14,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245534765] [2024-06-04 14:56:14,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:14,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:56:14,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:14,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:56:14,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:56:14,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:56:14,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 83 transitions, 587 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-04 14:56:14,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:14,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:56:14,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:15,506 INFO L124 PetriNetUnfolderBase]: 2559/3822 cut-off events. [2024-06-04 14:56:15,507 INFO L125 PetriNetUnfolderBase]: For 37389/37395 co-relation queries the response was YES. [2024-06-04 14:56:15,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17234 conditions, 3822 events. 2559/3822 cut-off events. For 37389/37395 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 18224 event pairs, 918 based on Foata normal form. 7/3826 useless extension candidates. Maximal degree in co-relation 17199. Up to 3575 conditions per place. [2024-06-04 14:56:15,527 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 96 selfloop transitions, 28 changer transitions 0/132 dead transitions. [2024-06-04 14:56:15,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 132 transitions, 1155 flow [2024-06-04 14:56:15,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:56:15,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:56:15,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-04 14:56:15,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4707792207792208 [2024-06-04 14:56:15,529 INFO L175 Difference]: Start difference. First operand has 80 places, 83 transitions, 587 flow. Second operand 7 states and 145 transitions. [2024-06-04 14:56:15,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 132 transitions, 1155 flow [2024-06-04 14:56:15,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 132 transitions, 1099 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-04 14:56:15,550 INFO L231 Difference]: Finished difference. Result has 86 places, 100 transitions, 766 flow [2024-06-04 14:56:15,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=531, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=766, PETRI_PLACES=86, PETRI_TRANSITIONS=100} [2024-06-04 14:56:15,550 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 41 predicate places. [2024-06-04 14:56:15,550 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 100 transitions, 766 flow [2024-06-04 14:56:15,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-04 14:56:15,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:15,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:15,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-04 14:56:15,551 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)] === [2024-06-04 14:56:15,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:15,552 INFO L85 PathProgramCache]: Analyzing trace with hash -657745035, now seen corresponding path program 3 times [2024-06-04 14:56:15,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:15,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423998064] [2024-06-04 14:56:15,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:15,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:15,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:16,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:16,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:16,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423998064] [2024-06-04 14:56:16,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423998064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:16,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:16,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:56:16,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938869566] [2024-06-04 14:56:16,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:16,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:56:16,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:16,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:56:16,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:56:16,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:56:16,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 100 transitions, 766 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-04 14:56:16,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:16,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:56:16,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:16,908 INFO L124 PetriNetUnfolderBase]: 2433/3674 cut-off events. [2024-06-04 14:56:16,909 INFO L125 PetriNetUnfolderBase]: For 39618/39666 co-relation queries the response was YES. [2024-06-04 14:56:16,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17805 conditions, 3674 events. 2433/3674 cut-off events. For 39618/39666 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 17846 event pairs, 822 based on Foata normal form. 2/3635 useless extension candidates. Maximal degree in co-relation 17766. Up to 3509 conditions per place. [2024-06-04 14:56:16,927 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 93 selfloop transitions, 14 changer transitions 0/119 dead transitions. [2024-06-04 14:56:16,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 119 transitions, 1028 flow [2024-06-04 14:56:16,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:56:16,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:56:16,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-04 14:56:16,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-04 14:56:16,930 INFO L175 Difference]: Start difference. First operand has 86 places, 100 transitions, 766 flow. Second operand 7 states and 126 transitions. [2024-06-04 14:56:16,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 119 transitions, 1028 flow [2024-06-04 14:56:16,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 119 transitions, 970 flow, removed 28 selfloop flow, removed 1 redundant places. [2024-06-04 14:56:16,957 INFO L231 Difference]: Finished difference. Result has 92 places, 100 transitions, 744 flow [2024-06-04 14:56:16,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=708, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=744, PETRI_PLACES=92, PETRI_TRANSITIONS=100} [2024-06-04 14:56:16,958 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 47 predicate places. [2024-06-04 14:56:16,958 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 100 transitions, 744 flow [2024-06-04 14:56:16,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-04 14:56:16,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:16,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:16,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-04 14:56:16,958 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)] === [2024-06-04 14:56:16,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:16,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1985534419, now seen corresponding path program 2 times [2024-06-04 14:56:16,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:16,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722142397] [2024-06-04 14:56:16,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:16,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:16,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:17,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:17,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:17,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722142397] [2024-06-04 14:56:17,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722142397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:17,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:17,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:56:17,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978765627] [2024-06-04 14:56:17,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:17,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:56:17,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:17,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:56:17,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:56:17,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:56:17,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 100 transitions, 744 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-04 14:56:17,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:17,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:56:17,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:18,329 INFO L124 PetriNetUnfolderBase]: 2590/3866 cut-off events. [2024-06-04 14:56:18,330 INFO L125 PetriNetUnfolderBase]: For 50139/50139 co-relation queries the response was YES. [2024-06-04 14:56:18,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19426 conditions, 3866 events. 2590/3866 cut-off events. For 50139/50139 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 18425 event pairs, 942 based on Foata normal form. 6/3870 useless extension candidates. Maximal degree in co-relation 19384. Up to 3738 conditions per place. [2024-06-04 14:56:18,350 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 99 selfloop transitions, 21 changer transitions 0/128 dead transitions. [2024-06-04 14:56:18,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 128 transitions, 1150 flow [2024-06-04 14:56:18,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:56:18,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:56:18,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-04 14:56:18,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43506493506493504 [2024-06-04 14:56:18,352 INFO L175 Difference]: Start difference. First operand has 92 places, 100 transitions, 744 flow. Second operand 7 states and 134 transitions. [2024-06-04 14:56:18,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 128 transitions, 1150 flow [2024-06-04 14:56:18,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 128 transitions, 1098 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-04 14:56:18,379 INFO L231 Difference]: Finished difference. Result has 93 places, 106 transitions, 813 flow [2024-06-04 14:56:18,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=692, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=813, PETRI_PLACES=93, PETRI_TRANSITIONS=106} [2024-06-04 14:56:18,379 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 48 predicate places. [2024-06-04 14:56:18,379 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 106 transitions, 813 flow [2024-06-04 14:56:18,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-04 14:56:18,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:18,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:18,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-04 14:56:18,380 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)] === [2024-06-04 14:56:18,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:18,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1128740497, now seen corresponding path program 3 times [2024-06-04 14:56:18,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:18,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265690046] [2024-06-04 14:56:18,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:18,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:18,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:19,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:19,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:19,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265690046] [2024-06-04 14:56:19,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265690046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:19,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:19,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:56:19,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354330503] [2024-06-04 14:56:19,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:19,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:56:19,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:19,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:56:19,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:56:19,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:56:19,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 106 transitions, 813 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-04 14:56:19,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:19,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:56:19,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:19,761 INFO L124 PetriNetUnfolderBase]: 2596/3874 cut-off events. [2024-06-04 14:56:19,762 INFO L125 PetriNetUnfolderBase]: For 55829/55829 co-relation queries the response was YES. [2024-06-04 14:56:19,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19992 conditions, 3874 events. 2596/3874 cut-off events. For 55829/55829 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 18449 event pairs, 935 based on Foata normal form. 6/3878 useless extension candidates. Maximal degree in co-relation 19948. Up to 3684 conditions per place. [2024-06-04 14:56:19,782 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 102 selfloop transitions, 27 changer transitions 0/137 dead transitions. [2024-06-04 14:56:19,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 137 transitions, 1304 flow [2024-06-04 14:56:19,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:56:19,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:56:19,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-04 14:56:19,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4448051948051948 [2024-06-04 14:56:19,786 INFO L175 Difference]: Start difference. First operand has 93 places, 106 transitions, 813 flow. Second operand 7 states and 137 transitions. [2024-06-04 14:56:19,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 137 transitions, 1304 flow [2024-06-04 14:56:19,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 137 transitions, 1245 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-04 14:56:19,811 INFO L231 Difference]: Finished difference. Result has 97 places, 113 transitions, 920 flow [2024-06-04 14:56:19,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=754, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=920, PETRI_PLACES=97, PETRI_TRANSITIONS=113} [2024-06-04 14:56:19,812 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 52 predicate places. [2024-06-04 14:56:19,812 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 113 transitions, 920 flow [2024-06-04 14:56:19,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 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) [2024-06-04 14:56:19,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:19,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:19,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-04 14:56:19,813 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)] === [2024-06-04 14:56:19,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:19,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1985523507, now seen corresponding path program 1 times [2024-06-04 14:56:19,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:19,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126025324] [2024-06-04 14:56:19,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:19,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:19,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:20,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:20,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:20,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126025324] [2024-06-04 14:56:20,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126025324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:20,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:20,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:56:20,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814491182] [2024-06-04 14:56:20,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:20,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:56:20,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:20,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:56:20,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:56:20,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:56:20,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 113 transitions, 920 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:20,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:20,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:56:20,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:21,716 INFO L124 PetriNetUnfolderBase]: 2598/3878 cut-off events. [2024-06-04 14:56:21,716 INFO L125 PetriNetUnfolderBase]: For 62682/62682 co-relation queries the response was YES. [2024-06-04 14:56:21,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20671 conditions, 3878 events. 2598/3878 cut-off events. For 62682/62682 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 18510 event pairs, 915 based on Foata normal form. 6/3882 useless extension candidates. Maximal degree in co-relation 20626. Up to 3729 conditions per place. [2024-06-04 14:56:21,735 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 105 selfloop transitions, 25 changer transitions 0/138 dead transitions. [2024-06-04 14:56:21,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 138 transitions, 1340 flow [2024-06-04 14:56:21,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:56:21,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:56:21,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-04 14:56:21,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4383116883116883 [2024-06-04 14:56:21,737 INFO L175 Difference]: Start difference. First operand has 97 places, 113 transitions, 920 flow. Second operand 7 states and 135 transitions. [2024-06-04 14:56:21,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 138 transitions, 1340 flow [2024-06-04 14:56:21,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 138 transitions, 1285 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-04 14:56:21,765 INFO L231 Difference]: Finished difference. Result has 101 places, 116 transitions, 971 flow [2024-06-04 14:56:21,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=865, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=971, PETRI_PLACES=101, PETRI_TRANSITIONS=116} [2024-06-04 14:56:21,766 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 56 predicate places. [2024-06-04 14:56:21,766 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 116 transitions, 971 flow [2024-06-04 14:56:21,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:21,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:21,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:21,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-04 14:56:21,767 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:56:21,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:21,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1120993648, now seen corresponding path program 1 times [2024-06-04 14:56:21,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:21,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700798058] [2024-06-04 14:56:21,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:21,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:21,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:22,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:22,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:22,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700798058] [2024-06-04 14:56:22,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700798058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:22,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:22,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:56:22,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479777065] [2024-06-04 14:56:22,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:22,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:56:22,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:22,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:56:22,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:56:22,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:56:22,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 116 transitions, 971 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:22,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:22,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:56:22,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:22,976 INFO L124 PetriNetUnfolderBase]: 2453/3732 cut-off events. [2024-06-04 14:56:22,976 INFO L125 PetriNetUnfolderBase]: For 67423/67423 co-relation queries the response was YES. [2024-06-04 14:56:22,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20876 conditions, 3732 events. 2453/3732 cut-off events. For 67423/67423 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 18296 event pairs, 939 based on Foata normal form. 1/3731 useless extension candidates. Maximal degree in co-relation 20829. Up to 3647 conditions per place. [2024-06-04 14:56:23,001 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 106 selfloop transitions, 8 changer transitions 0/124 dead transitions. [2024-06-04 14:56:23,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 124 transitions, 1219 flow [2024-06-04 14:56:23,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:56:23,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:56:23,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 94 transitions. [2024-06-04 14:56:23,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42727272727272725 [2024-06-04 14:56:23,002 INFO L175 Difference]: Start difference. First operand has 101 places, 116 transitions, 971 flow. Second operand 5 states and 94 transitions. [2024-06-04 14:56:23,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 124 transitions, 1219 flow [2024-06-04 14:56:23,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 124 transitions, 1127 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-04 14:56:23,037 INFO L231 Difference]: Finished difference. Result has 101 places, 116 transitions, 901 flow [2024-06-04 14:56:23,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=879, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=901, PETRI_PLACES=101, PETRI_TRANSITIONS=116} [2024-06-04 14:56:23,038 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 56 predicate places. [2024-06-04 14:56:23,038 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 116 transitions, 901 flow [2024-06-04 14:56:23,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:23,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:23,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:23,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-04 14:56:23,039 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)] === [2024-06-04 14:56:23,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:23,039 INFO L85 PathProgramCache]: Analyzing trace with hash -168443274, now seen corresponding path program 1 times [2024-06-04 14:56:23,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:23,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121352616] [2024-06-04 14:56:23,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:23,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:23,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:23,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:23,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:23,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121352616] [2024-06-04 14:56:23,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121352616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:23,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:23,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:56:23,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271007584] [2024-06-04 14:56:23,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:23,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:56:23,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:23,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:56:23,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:56:24,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:56:24,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 116 transitions, 901 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:24,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:24,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:56:24,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:24,660 INFO L124 PetriNetUnfolderBase]: 2494/3763 cut-off events. [2024-06-04 14:56:24,660 INFO L125 PetriNetUnfolderBase]: For 71549/71584 co-relation queries the response was YES. [2024-06-04 14:56:24,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20863 conditions, 3763 events. 2494/3763 cut-off events. For 71549/71584 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 18297 event pairs, 835 based on Foata normal form. 12/3745 useless extension candidates. Maximal degree in co-relation 20815. Up to 3469 conditions per place. [2024-06-04 14:56:24,686 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 105 selfloop transitions, 35 changer transitions 0/156 dead transitions. [2024-06-04 14:56:24,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 156 transitions, 1433 flow [2024-06-04 14:56:24,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:56:24,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:56:24,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-04 14:56:24,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460227272727273 [2024-06-04 14:56:24,688 INFO L175 Difference]: Start difference. First operand has 101 places, 116 transitions, 901 flow. Second operand 8 states and 157 transitions. [2024-06-04 14:56:24,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 156 transitions, 1433 flow [2024-06-04 14:56:24,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 156 transitions, 1411 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-04 14:56:24,729 INFO L231 Difference]: Finished difference. Result has 105 places, 122 transitions, 1059 flow [2024-06-04 14:56:24,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=879, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1059, PETRI_PLACES=105, PETRI_TRANSITIONS=122} [2024-06-04 14:56:24,730 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 60 predicate places. [2024-06-04 14:56:24,730 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 122 transitions, 1059 flow [2024-06-04 14:56:24,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:24,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:24,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:24,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-04 14:56:24,730 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)] === [2024-06-04 14:56:24,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:24,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1574472241, now seen corresponding path program 1 times [2024-06-04 14:56:24,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:24,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564944799] [2024-06-04 14:56:24,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:24,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:24,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:25,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:25,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:25,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564944799] [2024-06-04 14:56:25,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564944799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:25,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:25,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:56:25,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710122428] [2024-06-04 14:56:25,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:25,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:56:25,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:25,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:56:25,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:56:25,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:56:25,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 122 transitions, 1059 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:25,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:25,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:56:25,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:26,362 INFO L124 PetriNetUnfolderBase]: 2803/4123 cut-off events. [2024-06-04 14:56:26,363 INFO L125 PetriNetUnfolderBase]: For 84019/84028 co-relation queries the response was YES. [2024-06-04 14:56:26,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23576 conditions, 4123 events. 2803/4123 cut-off events. For 84019/84028 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 19329 event pairs, 885 based on Foata normal form. 8/4128 useless extension candidates. Maximal degree in co-relation 23528. Up to 3704 conditions per place. [2024-06-04 14:56:26,388 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 121 selfloop transitions, 50 changer transitions 0/174 dead transitions. [2024-06-04 14:56:26,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 174 transitions, 1863 flow [2024-06-04 14:56:26,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:56:26,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:56:26,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-04 14:56:26,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4602272727272727 [2024-06-04 14:56:26,389 INFO L175 Difference]: Start difference. First operand has 105 places, 122 transitions, 1059 flow. Second operand 8 states and 162 transitions. [2024-06-04 14:56:26,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 174 transitions, 1863 flow [2024-06-04 14:56:26,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 174 transitions, 1773 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-04 14:56:26,435 INFO L231 Difference]: Finished difference. Result has 111 places, 134 transitions, 1243 flow [2024-06-04 14:56:26,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=969, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1243, PETRI_PLACES=111, PETRI_TRANSITIONS=134} [2024-06-04 14:56:26,436 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 66 predicate places. [2024-06-04 14:56:26,436 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 134 transitions, 1243 flow [2024-06-04 14:56:26,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:26,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:26,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:26,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-04 14:56:26,437 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)] === [2024-06-04 14:56:26,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:26,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1688103414, now seen corresponding path program 2 times [2024-06-04 14:56:26,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:26,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539267174] [2024-06-04 14:56:26,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:26,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:26,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:27,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:27,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:27,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539267174] [2024-06-04 14:56:27,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539267174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:27,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:27,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:56:27,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335089752] [2024-06-04 14:56:27,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:27,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:56:27,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:27,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:56:27,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:56:27,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:56:27,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 134 transitions, 1243 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:27,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:27,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:56:27,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:28,038 INFO L124 PetriNetUnfolderBase]: 2615/3924 cut-off events. [2024-06-04 14:56:28,038 INFO L125 PetriNetUnfolderBase]: For 92682/92725 co-relation queries the response was YES. [2024-06-04 14:56:28,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23913 conditions, 3924 events. 2615/3924 cut-off events. For 92682/92725 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 18998 event pairs, 836 based on Foata normal form. 12/3906 useless extension candidates. Maximal degree in co-relation 23861. Up to 3611 conditions per place. [2024-06-04 14:56:28,065 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 113 selfloop transitions, 36 changer transitions 0/168 dead transitions. [2024-06-04 14:56:28,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 168 transitions, 1737 flow [2024-06-04 14:56:28,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:56:28,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:56:28,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-04 14:56:28,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-04 14:56:28,066 INFO L175 Difference]: Start difference. First operand has 111 places, 134 transitions, 1243 flow. Second operand 8 states and 155 transitions. [2024-06-04 14:56:28,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 168 transitions, 1737 flow [2024-06-04 14:56:28,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 168 transitions, 1627 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-04 14:56:28,124 INFO L231 Difference]: Finished difference. Result has 116 places, 137 transitions, 1253 flow [2024-06-04 14:56:28,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1133, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1253, PETRI_PLACES=116, PETRI_TRANSITIONS=137} [2024-06-04 14:56:28,125 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 71 predicate places. [2024-06-04 14:56:28,125 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 137 transitions, 1253 flow [2024-06-04 14:56:28,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:28,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:28,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:28,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-04 14:56:28,125 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)] === [2024-06-04 14:56:28,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:28,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1580036431, now seen corresponding path program 2 times [2024-06-04 14:56:28,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:28,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708743084] [2024-06-04 14:56:28,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:28,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:28,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:28,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:28,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:28,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708743084] [2024-06-04 14:56:28,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708743084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:28,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:28,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:56:28,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681537306] [2024-06-04 14:56:28,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:28,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:56:28,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:28,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:56:28,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:56:29,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:56:29,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 137 transitions, 1253 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:29,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:29,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:56:29,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:29,770 INFO L124 PetriNetUnfolderBase]: 2906/4270 cut-off events. [2024-06-04 14:56:29,770 INFO L125 PetriNetUnfolderBase]: For 104522/104531 co-relation queries the response was YES. [2024-06-04 14:56:29,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26195 conditions, 4270 events. 2906/4270 cut-off events. For 104522/104531 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 20085 event pairs, 893 based on Foata normal form. 8/4275 useless extension candidates. Maximal degree in co-relation 26141. Up to 3792 conditions per place. [2024-06-04 14:56:29,803 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 129 selfloop transitions, 52 changer transitions 0/184 dead transitions. [2024-06-04 14:56:29,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 184 transitions, 2137 flow [2024-06-04 14:56:29,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:56:29,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:56:29,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-04 14:56:29,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45738636363636365 [2024-06-04 14:56:29,804 INFO L175 Difference]: Start difference. First operand has 116 places, 137 transitions, 1253 flow. Second operand 8 states and 161 transitions. [2024-06-04 14:56:29,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 184 transitions, 2137 flow [2024-06-04 14:56:29,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 184 transitions, 2056 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-04 14:56:29,871 INFO L231 Difference]: Finished difference. Result has 120 places, 145 transitions, 1394 flow [2024-06-04 14:56:29,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1172, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1394, PETRI_PLACES=120, PETRI_TRANSITIONS=145} [2024-06-04 14:56:29,871 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 75 predicate places. [2024-06-04 14:56:29,871 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 145 transitions, 1394 flow [2024-06-04 14:56:29,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:29,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:29,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:29,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-04 14:56:29,872 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)] === [2024-06-04 14:56:29,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:29,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1580036214, now seen corresponding path program 3 times [2024-06-04 14:56:29,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:29,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536600685] [2024-06-04 14:56:29,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:29,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:29,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:30,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:30,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:30,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536600685] [2024-06-04 14:56:30,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536600685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:30,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:30,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:56:30,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606577032] [2024-06-04 14:56:30,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:30,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:56:30,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:30,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:56:30,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:56:30,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:56:30,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 145 transitions, 1394 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:30,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:30,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:56:30,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:31,484 INFO L124 PetriNetUnfolderBase]: 2715/4068 cut-off events. [2024-06-04 14:56:31,484 INFO L125 PetriNetUnfolderBase]: For 111944/111987 co-relation queries the response was YES. [2024-06-04 14:56:31,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26003 conditions, 4068 events. 2715/4068 cut-off events. For 111944/111987 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 19773 event pairs, 846 based on Foata normal form. 12/4050 useless extension candidates. Maximal degree in co-relation 25947. Up to 3739 conditions per place. [2024-06-04 14:56:31,516 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 117 selfloop transitions, 38 changer transitions 0/176 dead transitions. [2024-06-04 14:56:31,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 176 transitions, 1903 flow [2024-06-04 14:56:31,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:56:31,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:56:31,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-04 14:56:31,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-04 14:56:31,518 INFO L175 Difference]: Start difference. First operand has 120 places, 145 transitions, 1394 flow. Second operand 8 states and 153 transitions. [2024-06-04 14:56:31,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 176 transitions, 1903 flow [2024-06-04 14:56:31,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 176 transitions, 1790 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-04 14:56:31,599 INFO L231 Difference]: Finished difference. Result has 124 places, 148 transitions, 1408 flow [2024-06-04 14:56:31,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1281, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1408, PETRI_PLACES=124, PETRI_TRANSITIONS=148} [2024-06-04 14:56:31,599 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 79 predicate places. [2024-06-04 14:56:31,600 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 148 transitions, 1408 flow [2024-06-04 14:56:31,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:31,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:31,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:31,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-04 14:56:31,600 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)] === [2024-06-04 14:56:31,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:31,600 INFO L85 PathProgramCache]: Analyzing trace with hash -162721697, now seen corresponding path program 3 times [2024-06-04 14:56:31,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:31,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335759013] [2024-06-04 14:56:31,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:31,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:31,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:32,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:32,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:32,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335759013] [2024-06-04 14:56:32,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335759013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:32,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:32,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:56:32,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995215684] [2024-06-04 14:56:32,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:32,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:56:32,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:32,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:56:32,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:56:32,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:56:32,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 148 transitions, 1408 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:32,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:32,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:56:32,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:33,194 INFO L124 PetriNetUnfolderBase]: 2921/4292 cut-off events. [2024-06-04 14:56:33,194 INFO L125 PetriNetUnfolderBase]: For 121666/121675 co-relation queries the response was YES. [2024-06-04 14:56:33,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27259 conditions, 4292 events. 2921/4292 cut-off events. For 121666/121675 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 20196 event pairs, 887 based on Foata normal form. 8/4297 useless extension candidates. Maximal degree in co-relation 27202. Up to 3817 conditions per place. [2024-06-04 14:56:33,228 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 125 selfloop transitions, 60 changer transitions 0/188 dead transitions. [2024-06-04 14:56:33,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 188 transitions, 2169 flow [2024-06-04 14:56:33,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:56:33,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:56:33,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-04 14:56:33,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-04 14:56:33,229 INFO L175 Difference]: Start difference. First operand has 124 places, 148 transitions, 1408 flow. Second operand 8 states and 159 transitions. [2024-06-04 14:56:33,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 188 transitions, 2169 flow [2024-06-04 14:56:33,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 188 transitions, 2085 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-04 14:56:33,311 INFO L231 Difference]: Finished difference. Result has 127 places, 152 transitions, 1518 flow [2024-06-04 14:56:33,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1324, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1518, PETRI_PLACES=127, PETRI_TRANSITIONS=152} [2024-06-04 14:56:33,312 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 82 predicate places. [2024-06-04 14:56:33,312 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 152 transitions, 1518 flow [2024-06-04 14:56:33,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:33,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:33,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:33,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-04 14:56:33,312 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)] === [2024-06-04 14:56:33,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:33,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1093946339, now seen corresponding path program 4 times [2024-06-04 14:56:33,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:33,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982647782] [2024-06-04 14:56:33,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:33,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:33,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:34,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:34,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:34,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982647782] [2024-06-04 14:56:34,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982647782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:34,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:34,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:56:34,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705958043] [2024-06-04 14:56:34,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:34,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:56:34,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:34,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:56:34,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:56:34,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:56:34,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 152 transitions, 1518 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:34,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:34,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:56:34,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:34,956 INFO L124 PetriNetUnfolderBase]: 2957/4343 cut-off events. [2024-06-04 14:56:34,956 INFO L125 PetriNetUnfolderBase]: For 132649/132649 co-relation queries the response was YES. [2024-06-04 14:56:34,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28299 conditions, 4343 events. 2957/4343 cut-off events. For 132649/132649 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 20449 event pairs, 926 based on Foata normal form. 6/4347 useless extension candidates. Maximal degree in co-relation 28241. Up to 4235 conditions per place. [2024-06-04 14:56:34,983 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 154 selfloop transitions, 25 changer transitions 0/182 dead transitions. [2024-06-04 14:56:34,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 182 transitions, 2060 flow [2024-06-04 14:56:34,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:56:34,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:56:34,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-04 14:56:34,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-04 14:56:34,984 INFO L175 Difference]: Start difference. First operand has 127 places, 152 transitions, 1518 flow. Second operand 8 states and 144 transitions. [2024-06-04 14:56:34,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 182 transitions, 2060 flow [2024-06-04 14:56:35,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 182 transitions, 1923 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-04 14:56:35,070 INFO L231 Difference]: Finished difference. Result has 130 places, 156 transitions, 1516 flow [2024-06-04 14:56:35,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1387, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1516, PETRI_PLACES=130, PETRI_TRANSITIONS=156} [2024-06-04 14:56:35,070 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 85 predicate places. [2024-06-04 14:56:35,071 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 156 transitions, 1516 flow [2024-06-04 14:56:35,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:35,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:35,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:35,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-04 14:56:35,071 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)] === [2024-06-04 14:56:35,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:35,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1431227569, now seen corresponding path program 5 times [2024-06-04 14:56:35,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:35,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063177] [2024-06-04 14:56:35,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:35,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:35,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:35,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:35,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:35,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063177] [2024-06-04 14:56:35,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:35,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:35,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:56:35,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407841686] [2024-06-04 14:56:35,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:35,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:56:35,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:35,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:56:35,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:56:35,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:56:35,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 156 transitions, 1516 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:35,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:35,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:56:35,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:36,653 INFO L124 PetriNetUnfolderBase]: 2993/4395 cut-off events. [2024-06-04 14:56:36,653 INFO L125 PetriNetUnfolderBase]: For 142276/142276 co-relation queries the response was YES. [2024-06-04 14:56:36,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28815 conditions, 4395 events. 2993/4395 cut-off events. For 142276/142276 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 20759 event pairs, 919 based on Foata normal form. 6/4399 useless extension candidates. Maximal degree in co-relation 28756. Up to 4123 conditions per place. [2024-06-04 14:56:36,686 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 154 selfloop transitions, 37 changer transitions 0/194 dead transitions. [2024-06-04 14:56:36,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 194 transitions, 2326 flow [2024-06-04 14:56:36,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:56:36,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:56:36,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-04 14:56:36,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-04 14:56:36,687 INFO L175 Difference]: Start difference. First operand has 130 places, 156 transitions, 1516 flow. Second operand 8 states and 150 transitions. [2024-06-04 14:56:36,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 194 transitions, 2326 flow [2024-06-04 14:56:36,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 194 transitions, 2237 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-04 14:56:36,785 INFO L231 Difference]: Finished difference. Result has 133 places, 163 transitions, 1645 flow [2024-06-04 14:56:36,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1427, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1645, PETRI_PLACES=133, PETRI_TRANSITIONS=163} [2024-06-04 14:56:36,786 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 88 predicate places. [2024-06-04 14:56:36,786 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 163 transitions, 1645 flow [2024-06-04 14:56:36,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:36,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:36,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:36,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-04 14:56:36,786 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)] === [2024-06-04 14:56:36,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:36,786 INFO L85 PathProgramCache]: Analyzing trace with hash -631223210, now seen corresponding path program 4 times [2024-06-04 14:56:36,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:36,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916025687] [2024-06-04 14:56:36,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:36,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:36,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:37,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:37,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:37,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916025687] [2024-06-04 14:56:37,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916025687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:37,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:37,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:56:37,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355803459] [2024-06-04 14:56:37,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:37,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:56:37,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:37,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:56:37,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:56:37,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:56:37,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 163 transitions, 1645 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:37,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:37,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:56:37,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:38,299 INFO L124 PetriNetUnfolderBase]: 2783/4167 cut-off events. [2024-06-04 14:56:38,300 INFO L125 PetriNetUnfolderBase]: For 149326/149360 co-relation queries the response was YES. [2024-06-04 14:56:38,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28233 conditions, 4167 events. 2783/4167 cut-off events. For 149326/149360 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 20282 event pairs, 854 based on Foata normal form. 6/4144 useless extension candidates. Maximal degree in co-relation 28172. Up to 3925 conditions per place. [2024-06-04 14:56:38,333 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 144 selfloop transitions, 17 changer transitions 0/186 dead transitions. [2024-06-04 14:56:38,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 186 transitions, 2025 flow [2024-06-04 14:56:38,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:56:38,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:56:38,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-04 14:56:38,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4034090909090909 [2024-06-04 14:56:38,335 INFO L175 Difference]: Start difference. First operand has 133 places, 163 transitions, 1645 flow. Second operand 8 states and 142 transitions. [2024-06-04 14:56:38,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 186 transitions, 2025 flow [2024-06-04 14:56:38,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 186 transitions, 1911 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-04 14:56:38,443 INFO L231 Difference]: Finished difference. Result has 137 places, 163 transitions, 1573 flow [2024-06-04 14:56:38,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1531, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1573, PETRI_PLACES=137, PETRI_TRANSITIONS=163} [2024-06-04 14:56:38,444 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 92 predicate places. [2024-06-04 14:56:38,444 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 163 transitions, 1573 flow [2024-06-04 14:56:38,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:38,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:38,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:38,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-04 14:56:38,445 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)] === [2024-06-04 14:56:38,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:38,445 INFO L85 PathProgramCache]: Analyzing trace with hash -621692074, now seen corresponding path program 1 times [2024-06-04 14:56:38,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:38,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874696696] [2024-06-04 14:56:38,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:38,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:38,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:39,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:39,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:39,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874696696] [2024-06-04 14:56:39,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874696696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:39,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:39,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:56:39,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358114014] [2024-06-04 14:56:39,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:39,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:56:39,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:39,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:56:39,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:56:39,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:56:39,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 163 transitions, 1573 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:39,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:39,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:56:39,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:40,151 INFO L124 PetriNetUnfolderBase]: 2862/4263 cut-off events. [2024-06-04 14:56:40,152 INFO L125 PetriNetUnfolderBase]: For 159552/159552 co-relation queries the response was YES. [2024-06-04 14:56:40,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28920 conditions, 4263 events. 2862/4263 cut-off events. For 159552/159552 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 20576 event pairs, 911 based on Foata normal form. 3/4264 useless extension candidates. Maximal degree in co-relation 28857. Up to 3998 conditions per place. [2024-06-04 14:56:40,186 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 141 selfloop transitions, 30 changer transitions 0/188 dead transitions. [2024-06-04 14:56:40,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 188 transitions, 2091 flow [2024-06-04 14:56:40,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:56:40,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:56:40,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-04 14:56:40,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4383116883116883 [2024-06-04 14:56:40,187 INFO L175 Difference]: Start difference. First operand has 137 places, 163 transitions, 1573 flow. Second operand 7 states and 135 transitions. [2024-06-04 14:56:40,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 188 transitions, 2091 flow [2024-06-04 14:56:40,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 188 transitions, 2003 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-04 14:56:40,361 INFO L231 Difference]: Finished difference. Result has 134 places, 167 transitions, 1635 flow [2024-06-04 14:56:40,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1485, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1635, PETRI_PLACES=134, PETRI_TRANSITIONS=167} [2024-06-04 14:56:40,361 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 89 predicate places. [2024-06-04 14:56:40,361 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 167 transitions, 1635 flow [2024-06-04 14:56:40,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:40,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:40,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:40,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-04 14:56:40,362 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)] === [2024-06-04 14:56:40,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:40,363 INFO L85 PathProgramCache]: Analyzing trace with hash -631215553, now seen corresponding path program 6 times [2024-06-04 14:56:40,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:40,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867517064] [2024-06-04 14:56:40,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:40,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:40,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:41,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:41,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:41,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867517064] [2024-06-04 14:56:41,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867517064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:41,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:41,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:56:41,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616826905] [2024-06-04 14:56:41,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:41,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:56:41,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:41,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:56:41,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:56:41,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:56:41,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 167 transitions, 1635 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:41,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:41,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:56:41,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:41,998 INFO L124 PetriNetUnfolderBase]: 2994/4397 cut-off events. [2024-06-04 14:56:41,998 INFO L125 PetriNetUnfolderBase]: For 169700/169700 co-relation queries the response was YES. [2024-06-04 14:56:42,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30529 conditions, 4397 events. 2994/4397 cut-off events. For 169700/169700 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 20759 event pairs, 915 based on Foata normal form. 6/4401 useless extension candidates. Maximal degree in co-relation 30466. Up to 4128 conditions per place. [2024-06-04 14:56:42,037 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 155 selfloop transitions, 41 changer transitions 0/199 dead transitions. [2024-06-04 14:56:42,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 199 transitions, 2296 flow [2024-06-04 14:56:42,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:56:42,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:56:42,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-04 14:56:42,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42329545454545453 [2024-06-04 14:56:42,040 INFO L175 Difference]: Start difference. First operand has 134 places, 167 transitions, 1635 flow. Second operand 8 states and 149 transitions. [2024-06-04 14:56:42,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 199 transitions, 2296 flow [2024-06-04 14:56:42,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 199 transitions, 2198 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-04 14:56:42,155 INFO L231 Difference]: Finished difference. Result has 137 places, 171 transitions, 1713 flow [2024-06-04 14:56:42,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1537, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1713, PETRI_PLACES=137, PETRI_TRANSITIONS=171} [2024-06-04 14:56:42,156 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 92 predicate places. [2024-06-04 14:56:42,156 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 171 transitions, 1713 flow [2024-06-04 14:56:42,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:42,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:42,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:42,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-04 14:56:42,157 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:56:42,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:42,157 INFO L85 PathProgramCache]: Analyzing trace with hash 391066010, now seen corresponding path program 1 times [2024-06-04 14:56:42,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:42,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64955296] [2024-06-04 14:56:42,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:42,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:42,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:42,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:42,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:42,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64955296] [2024-06-04 14:56:42,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64955296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:42,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:42,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:56:42,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036721528] [2024-06-04 14:56:42,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:42,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:56:42,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:42,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:56:42,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:56:42,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:56:42,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 171 transitions, 1713 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 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) [2024-06-04 14:56:42,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:42,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:56:42,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:43,650 INFO L124 PetriNetUnfolderBase]: 2743/4143 cut-off events. [2024-06-04 14:56:43,650 INFO L125 PetriNetUnfolderBase]: For 174389/174389 co-relation queries the response was YES. [2024-06-04 14:56:43,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29780 conditions, 4143 events. 2743/4143 cut-off events. For 174389/174389 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 20213 event pairs, 915 based on Foata normal form. 3/4144 useless extension candidates. Maximal degree in co-relation 29716. Up to 3901 conditions per place. [2024-06-04 14:56:43,680 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 150 selfloop transitions, 11 changer transitions 0/185 dead transitions. [2024-06-04 14:56:43,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 185 transitions, 2093 flow [2024-06-04 14:56:43,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:56:43,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:56:43,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-04 14:56:43,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-04 14:56:43,681 INFO L175 Difference]: Start difference. First operand has 137 places, 171 transitions, 1713 flow. Second operand 6 states and 110 transitions. [2024-06-04 14:56:43,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 185 transitions, 2093 flow [2024-06-04 14:56:43,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 185 transitions, 1983 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-04 14:56:43,781 INFO L231 Difference]: Finished difference. Result has 138 places, 174 transitions, 1669 flow [2024-06-04 14:56:43,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1603, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1669, PETRI_PLACES=138, PETRI_TRANSITIONS=174} [2024-06-04 14:56:43,782 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 93 predicate places. [2024-06-04 14:56:43,782 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 174 transitions, 1669 flow [2024-06-04 14:56:43,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 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) [2024-06-04 14:56:43,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:43,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:43,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-04 14:56:43,783 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)] === [2024-06-04 14:56:43,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:43,783 INFO L85 PathProgramCache]: Analyzing trace with hash -926777300, now seen corresponding path program 1 times [2024-06-04 14:56:43,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:43,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752777835] [2024-06-04 14:56:43,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:43,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:43,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:44,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:44,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:44,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752777835] [2024-06-04 14:56:44,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752777835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:44,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:44,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:56:44,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254713183] [2024-06-04 14:56:44,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:44,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:56:44,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:44,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:56:44,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:56:44,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:56:44,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 174 transitions, 1669 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:44,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:44,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:56:44,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:45,762 INFO L124 PetriNetUnfolderBase]: 2784/4188 cut-off events. [2024-06-04 14:56:45,762 INFO L125 PetriNetUnfolderBase]: For 179565/179595 co-relation queries the response was YES. [2024-06-04 14:56:45,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30155 conditions, 4188 events. 2784/4188 cut-off events. For 179565/179595 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 20467 event pairs, 816 based on Foata normal form. 6/4181 useless extension candidates. Maximal degree in co-relation 30090. Up to 3888 conditions per place. [2024-06-04 14:56:45,796 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 169 selfloop transitions, 20 changer transitions 0/216 dead transitions. [2024-06-04 14:56:45,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 216 transitions, 2219 flow [2024-06-04 14:56:45,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:56:45,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:56:45,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-04 14:56:45,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292929292929293 [2024-06-04 14:56:45,797 INFO L175 Difference]: Start difference. First operand has 138 places, 174 transitions, 1669 flow. Second operand 9 states and 170 transitions. [2024-06-04 14:56:45,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 216 transitions, 2219 flow [2024-06-04 14:56:45,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 216 transitions, 2173 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-04 14:56:45,896 INFO L231 Difference]: Finished difference. Result has 143 places, 177 transitions, 1749 flow [2024-06-04 14:56:45,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1623, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1749, PETRI_PLACES=143, PETRI_TRANSITIONS=177} [2024-06-04 14:56:45,896 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 98 predicate places. [2024-06-04 14:56:45,896 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 177 transitions, 1749 flow [2024-06-04 14:56:45,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:45,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:45,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:45,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-04 14:56:45,897 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)] === [2024-06-04 14:56:45,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:45,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1559352592, now seen corresponding path program 1 times [2024-06-04 14:56:45,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:45,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908631672] [2024-06-04 14:56:45,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:45,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:45,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:46,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:46,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:46,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908631672] [2024-06-04 14:56:46,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908631672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:46,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:46,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:56:46,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648671907] [2024-06-04 14:56:46,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:46,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:56:46,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:46,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:56:46,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:56:46,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:56:46,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 177 transitions, 1749 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:46,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:46,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:56:46,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:47,664 INFO L124 PetriNetUnfolderBase]: 3080/4521 cut-off events. [2024-06-04 14:56:47,664 INFO L125 PetriNetUnfolderBase]: For 200597/200606 co-relation queries the response was YES. [2024-06-04 14:56:47,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32994 conditions, 4521 events. 3080/4521 cut-off events. For 200597/200606 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 21492 event pairs, 775 based on Foata normal form. 8/4526 useless extension candidates. Maximal degree in co-relation 32928. Up to 3722 conditions per place. [2024-06-04 14:56:47,705 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 151 selfloop transitions, 84 changer transitions 0/238 dead transitions. [2024-06-04 14:56:47,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 238 transitions, 2955 flow [2024-06-04 14:56:47,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:56:47,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:56:47,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-04 14:56:47,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4671717171717172 [2024-06-04 14:56:47,707 INFO L175 Difference]: Start difference. First operand has 143 places, 177 transitions, 1749 flow. Second operand 9 states and 185 transitions. [2024-06-04 14:56:47,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 238 transitions, 2955 flow [2024-06-04 14:56:47,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 238 transitions, 2853 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-04 14:56:47,845 INFO L231 Difference]: Finished difference. Result has 147 places, 189 transitions, 2041 flow [2024-06-04 14:56:47,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1647, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2041, PETRI_PLACES=147, PETRI_TRANSITIONS=189} [2024-06-04 14:56:47,846 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 102 predicate places. [2024-06-04 14:56:47,846 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 189 transitions, 2041 flow [2024-06-04 14:56:47,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:47,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:47,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:47,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-04 14:56:47,846 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)] === [2024-06-04 14:56:47,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:47,846 INFO L85 PathProgramCache]: Analyzing trace with hash -926772650, now seen corresponding path program 2 times [2024-06-04 14:56:47,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:47,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908464274] [2024-06-04 14:56:47,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:47,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:47,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:48,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:48,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:48,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908464274] [2024-06-04 14:56:48,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908464274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:48,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:48,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:56:48,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644622422] [2024-06-04 14:56:48,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:48,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:56:48,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:48,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:56:48,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:56:48,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:56:48,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 189 transitions, 2041 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:48,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:48,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:56:48,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:49,727 INFO L124 PetriNetUnfolderBase]: 2905/4350 cut-off events. [2024-06-04 14:56:49,728 INFO L125 PetriNetUnfolderBase]: For 213683/213724 co-relation queries the response was YES. [2024-06-04 14:56:49,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33629 conditions, 4350 events. 2905/4350 cut-off events. For 213683/213724 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 21260 event pairs, 821 based on Foata normal form. 12/4348 useless extension candidates. Maximal degree in co-relation 33560. Up to 3914 conditions per place. [2024-06-04 14:56:49,764 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 154 selfloop transitions, 49 changer transitions 0/233 dead transitions. [2024-06-04 14:56:49,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 233 transitions, 2831 flow [2024-06-04 14:56:49,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:56:49,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:56:49,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-04 14:56:49,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44191919191919193 [2024-06-04 14:56:49,766 INFO L175 Difference]: Start difference. First operand has 147 places, 189 transitions, 2041 flow. Second operand 9 states and 175 transitions. [2024-06-04 14:56:49,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 233 transitions, 2831 flow [2024-06-04 14:56:49,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 233 transitions, 2639 flow, removed 56 selfloop flow, removed 4 redundant places. [2024-06-04 14:56:49,908 INFO L231 Difference]: Finished difference. Result has 152 places, 195 transitions, 2125 flow [2024-06-04 14:56:49,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1849, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2125, PETRI_PLACES=152, PETRI_TRANSITIONS=195} [2024-06-04 14:56:49,909 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 107 predicate places. [2024-06-04 14:56:49,909 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 195 transitions, 2125 flow [2024-06-04 14:56:49,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:49,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:49,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:49,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-04 14:56:49,910 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)] === [2024-06-04 14:56:49,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:49,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1730228002, now seen corresponding path program 2 times [2024-06-04 14:56:49,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:49,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407358441] [2024-06-04 14:56:49,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:49,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:49,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:50,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:50,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:50,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407358441] [2024-06-04 14:56:50,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407358441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:50,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:50,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:56:50,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60656848] [2024-06-04 14:56:50,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:50,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:56:50,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:50,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:56:50,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:56:50,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:56:50,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 195 transitions, 2125 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:50,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:50,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:56:50,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:51,705 INFO L124 PetriNetUnfolderBase]: 3183/4668 cut-off events. [2024-06-04 14:56:51,706 INFO L125 PetriNetUnfolderBase]: For 237768/237777 co-relation queries the response was YES. [2024-06-04 14:56:51,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36448 conditions, 4668 events. 3183/4668 cut-off events. For 237768/237777 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 22329 event pairs, 794 based on Foata normal form. 8/4673 useless extension candidates. Maximal degree in co-relation 36377. Up to 3810 conditions per place. [2024-06-04 14:56:51,746 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 167 selfloop transitions, 81 changer transitions 0/251 dead transitions. [2024-06-04 14:56:51,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 251 transitions, 3451 flow [2024-06-04 14:56:51,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:56:51,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:56:51,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-04 14:56:51,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46464646464646464 [2024-06-04 14:56:51,747 INFO L175 Difference]: Start difference. First operand has 152 places, 195 transitions, 2125 flow. Second operand 9 states and 184 transitions. [2024-06-04 14:56:51,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 251 transitions, 3451 flow [2024-06-04 14:56:51,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 251 transitions, 3313 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-04 14:56:51,943 INFO L231 Difference]: Finished difference. Result has 157 places, 203 transitions, 2299 flow [2024-06-04 14:56:51,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1987, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2299, PETRI_PLACES=157, PETRI_TRANSITIONS=203} [2024-06-04 14:56:51,943 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 112 predicate places. [2024-06-04 14:56:51,944 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 203 transitions, 2299 flow [2024-06-04 14:56:51,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:51,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:51,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:51,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-04 14:56:51,944 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)] === [2024-06-04 14:56:51,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:51,944 INFO L85 PathProgramCache]: Analyzing trace with hash -922131020, now seen corresponding path program 3 times [2024-06-04 14:56:51,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:51,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014513165] [2024-06-04 14:56:51,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:51,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:51,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:52,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:52,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:52,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014513165] [2024-06-04 14:56:52,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014513165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:52,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:52,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:56:52,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608759327] [2024-06-04 14:56:52,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:52,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:56:52,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:52,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:56:52,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:56:53,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:56:53,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 203 transitions, 2299 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:53,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:53,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:56:53,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:53,849 INFO L124 PetriNetUnfolderBase]: 3005/4494 cut-off events. [2024-06-04 14:56:53,849 INFO L125 PetriNetUnfolderBase]: For 246504/246545 co-relation queries the response was YES. [2024-06-04 14:56:53,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36275 conditions, 4494 events. 3005/4494 cut-off events. For 246504/246545 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 22132 event pairs, 833 based on Foata normal form. 12/4492 useless extension candidates. Maximal degree in co-relation 36201. Up to 4042 conditions per place. [2024-06-04 14:56:53,887 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 159 selfloop transitions, 50 changer transitions 0/241 dead transitions. [2024-06-04 14:56:53,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 241 transitions, 3003 flow [2024-06-04 14:56:53,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:56:53,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:56:53,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-04 14:56:53,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43686868686868685 [2024-06-04 14:56:53,889 INFO L175 Difference]: Start difference. First operand has 157 places, 203 transitions, 2299 flow. Second operand 9 states and 173 transitions. [2024-06-04 14:56:53,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 241 transitions, 3003 flow [2024-06-04 14:56:54,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 241 transitions, 2819 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-04 14:56:54,051 INFO L231 Difference]: Finished difference. Result has 161 places, 206 transitions, 2289 flow [2024-06-04 14:56:54,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2115, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2289, PETRI_PLACES=161, PETRI_TRANSITIONS=206} [2024-06-04 14:56:54,052 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 116 predicate places. [2024-06-04 14:56:54,052 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 206 transitions, 2289 flow [2024-06-04 14:56:54,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:54,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:54,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:54,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-04 14:56:54,052 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)] === [2024-06-04 14:56:54,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:54,053 INFO L85 PathProgramCache]: Analyzing trace with hash -922124324, now seen corresponding path program 3 times [2024-06-04 14:56:54,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:54,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279317242] [2024-06-04 14:56:54,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:54,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:54,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:54,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:54,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:54,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279317242] [2024-06-04 14:56:54,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279317242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:54,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:54,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:56:54,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035864703] [2024-06-04 14:56:54,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:54,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:56:54,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:54,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:56:54,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:56:55,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:56:55,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 206 transitions, 2289 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:55,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:55,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:56:55,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:55,916 INFO L124 PetriNetUnfolderBase]: 3198/4690 cut-off events. [2024-06-04 14:56:55,916 INFO L125 PetriNetUnfolderBase]: For 260784/260793 co-relation queries the response was YES. [2024-06-04 14:56:55,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37457 conditions, 4690 events. 3198/4690 cut-off events. For 260784/260793 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 22455 event pairs, 772 based on Foata normal form. 8/4695 useless extension candidates. Maximal degree in co-relation 37382. Up to 3835 conditions per place. [2024-06-04 14:56:55,956 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 163 selfloop transitions, 89 changer transitions 0/255 dead transitions. [2024-06-04 14:56:55,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 255 transitions, 3420 flow [2024-06-04 14:56:55,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:56:55,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:56:55,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-04 14:56:55,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595959595959596 [2024-06-04 14:56:55,957 INFO L175 Difference]: Start difference. First operand has 161 places, 206 transitions, 2289 flow. Second operand 9 states and 182 transitions. [2024-06-04 14:56:55,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 255 transitions, 3420 flow [2024-06-04 14:56:56,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 255 transitions, 3291 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-04 14:56:56,167 INFO L231 Difference]: Finished difference. Result has 164 places, 210 transitions, 2432 flow [2024-06-04 14:56:56,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2160, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2432, PETRI_PLACES=164, PETRI_TRANSITIONS=210} [2024-06-04 14:56:56,168 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 119 predicate places. [2024-06-04 14:56:56,168 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 210 transitions, 2432 flow [2024-06-04 14:56:56,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:56,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:56,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:56,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-04 14:56:56,168 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)] === [2024-06-04 14:56:56,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:56,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1736730190, now seen corresponding path program 1 times [2024-06-04 14:56:56,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:56,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222207652] [2024-06-04 14:56:56,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:56,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:56,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:57,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:57,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:57,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222207652] [2024-06-04 14:56:57,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222207652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:57,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:57,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:56:57,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842349507] [2024-06-04 14:56:57,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:57,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:56:57,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:57,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:56:57,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:56:57,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:56:57,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 210 transitions, 2432 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:57,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:57,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:56:57,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:56:58,305 INFO L124 PetriNetUnfolderBase]: 3095/4595 cut-off events. [2024-06-04 14:56:58,305 INFO L125 PetriNetUnfolderBase]: For 280850/280872 co-relation queries the response was YES. [2024-06-04 14:56:58,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37954 conditions, 4595 events. 3095/4595 cut-off events. For 280850/280872 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 22510 event pairs, 840 based on Foata normal form. 8/4578 useless extension candidates. Maximal degree in co-relation 37878. Up to 4190 conditions per place. [2024-06-04 14:56:58,346 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 188 selfloop transitions, 40 changer transitions 0/246 dead transitions. [2024-06-04 14:56:58,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 246 transitions, 3270 flow [2024-06-04 14:56:58,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:56:58,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:56:58,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-04 14:56:58,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45738636363636365 [2024-06-04 14:56:58,347 INFO L175 Difference]: Start difference. First operand has 164 places, 210 transitions, 2432 flow. Second operand 8 states and 161 transitions. [2024-06-04 14:56:58,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 246 transitions, 3270 flow [2024-06-04 14:56:58,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 246 transitions, 3059 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-04 14:56:58,563 INFO L231 Difference]: Finished difference. Result has 166 places, 213 transitions, 2395 flow [2024-06-04 14:56:58,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2221, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2395, PETRI_PLACES=166, PETRI_TRANSITIONS=213} [2024-06-04 14:56:58,563 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 121 predicate places. [2024-06-04 14:56:58,563 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 213 transitions, 2395 flow [2024-06-04 14:56:58,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:58,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:56:58,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:56:58,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-04 14:56:58,564 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)] === [2024-06-04 14:56:58,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:56:58,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1736490622, now seen corresponding path program 4 times [2024-06-04 14:56:58,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:56:58,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140208266] [2024-06-04 14:56:58,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:56:58,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:56:58,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:56:59,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:56:59,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:56:59,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140208266] [2024-06-04 14:56:59,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140208266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:56:59,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:56:59,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:56:59,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296896545] [2024-06-04 14:56:59,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:56:59,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:56:59,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:56:59,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:56:59,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:56:59,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:56:59,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 213 transitions, 2395 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:56:59,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:56:59,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:56:59,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:00,439 INFO L124 PetriNetUnfolderBase]: 3366/4933 cut-off events. [2024-06-04 14:57:00,440 INFO L125 PetriNetUnfolderBase]: For 301609/301618 co-relation queries the response was YES. [2024-06-04 14:57:00,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40596 conditions, 4933 events. 3366/4933 cut-off events. For 301609/301618 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 23799 event pairs, 830 based on Foata normal form. 8/4938 useless extension candidates. Maximal degree in co-relation 40519. Up to 3987 conditions per place. [2024-06-04 14:57:00,481 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 177 selfloop transitions, 91 changer transitions 0/271 dead transitions. [2024-06-04 14:57:00,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 271 transitions, 3993 flow [2024-06-04 14:57:00,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:57:00,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:57:00,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-04 14:57:00,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46464646464646464 [2024-06-04 14:57:00,482 INFO L175 Difference]: Start difference. First operand has 166 places, 213 transitions, 2395 flow. Second operand 9 states and 184 transitions. [2024-06-04 14:57:00,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 271 transitions, 3993 flow [2024-06-04 14:57:00,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 271 transitions, 3841 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-04 14:57:00,721 INFO L231 Difference]: Finished difference. Result has 171 places, 225 transitions, 2694 flow [2024-06-04 14:57:00,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2243, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2694, PETRI_PLACES=171, PETRI_TRANSITIONS=225} [2024-06-04 14:57:00,721 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 126 predicate places. [2024-06-04 14:57:00,722 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 225 transitions, 2694 flow [2024-06-04 14:57:00,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:00,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:00,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:57:00,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-04 14:57:00,722 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)] === [2024-06-04 14:57:00,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:00,722 INFO L85 PathProgramCache]: Analyzing trace with hash -749640944, now seen corresponding path program 5 times [2024-06-04 14:57:00,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:00,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545504581] [2024-06-04 14:57:00,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:00,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:00,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:57:01,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:57:01,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:57:01,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545504581] [2024-06-04 14:57:01,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545504581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:57:01,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:57:01,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:57:01,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667176785] [2024-06-04 14:57:01,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:57:01,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:57:01,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:57:01,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:57:01,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:57:01,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:57:01,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 225 transitions, 2694 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:01,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:57:01,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:57:01,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:02,656 INFO L124 PetriNetUnfolderBase]: 3354/4917 cut-off events. [2024-06-04 14:57:02,656 INFO L125 PetriNetUnfolderBase]: For 317155/317164 co-relation queries the response was YES. [2024-06-04 14:57:02,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41370 conditions, 4917 events. 3354/4917 cut-off events. For 317155/317164 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 23719 event pairs, 831 based on Foata normal form. 8/4922 useless extension candidates. Maximal degree in co-relation 41290. Up to 3981 conditions per place. [2024-06-04 14:57:02,705 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 177 selfloop transitions, 90 changer transitions 0/270 dead transitions. [2024-06-04 14:57:02,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 270 transitions, 4018 flow [2024-06-04 14:57:02,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:57:02,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:57:02,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-04 14:57:02,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595959595959596 [2024-06-04 14:57:02,706 INFO L175 Difference]: Start difference. First operand has 171 places, 225 transitions, 2694 flow. Second operand 9 states and 182 transitions. [2024-06-04 14:57:02,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 270 transitions, 4018 flow [2024-06-04 14:57:03,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 270 transitions, 3759 flow, removed 72 selfloop flow, removed 4 redundant places. [2024-06-04 14:57:03,033 INFO L231 Difference]: Finished difference. Result has 176 places, 225 transitions, 2627 flow [2024-06-04 14:57:03,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2437, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2627, PETRI_PLACES=176, PETRI_TRANSITIONS=225} [2024-06-04 14:57:03,034 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 131 predicate places. [2024-06-04 14:57:03,034 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 225 transitions, 2627 flow [2024-06-04 14:57:03,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:03,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:03,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:57:03,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-04 14:57:03,035 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:57:03,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:03,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1736483926, now seen corresponding path program 4 times [2024-06-04 14:57:03,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:03,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515409237] [2024-06-04 14:57:03,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:03,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:03,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:57:03,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:57:03,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:57:03,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515409237] [2024-06-04 14:57:03,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515409237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:57:03,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:57:03,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:57:03,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474105294] [2024-06-04 14:57:03,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:57:03,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:57:03,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:57:03,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:57:03,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:57:04,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:57:04,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 225 transitions, 2627 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:04,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:57:04,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:57:04,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:04,881 INFO L124 PetriNetUnfolderBase]: 3170/4737 cut-off events. [2024-06-04 14:57:04,881 INFO L125 PetriNetUnfolderBase]: For 319695/319742 co-relation queries the response was YES. [2024-06-04 14:57:04,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40102 conditions, 4737 events. 3170/4737 cut-off events. For 319695/319742 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 23508 event pairs, 853 based on Foata normal form. 12/4735 useless extension candidates. Maximal degree in co-relation 40021. Up to 4254 conditions per place. [2024-06-04 14:57:04,918 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 171 selfloop transitions, 52 changer transitions 0/260 dead transitions. [2024-06-04 14:57:04,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 260 transitions, 3374 flow [2024-06-04 14:57:04,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:57:04,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:57:04,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-04 14:57:04,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-04 14:57:04,919 INFO L175 Difference]: Start difference. First operand has 176 places, 225 transitions, 2627 flow. Second operand 9 states and 171 transitions. [2024-06-04 14:57:04,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 260 transitions, 3374 flow [2024-06-04 14:57:05,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 260 transitions, 3185 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-04 14:57:05,120 INFO L231 Difference]: Finished difference. Result has 177 places, 228 transitions, 2619 flow [2024-06-04 14:57:05,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2438, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2619, PETRI_PLACES=177, PETRI_TRANSITIONS=228} [2024-06-04 14:57:05,121 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 132 predicate places. [2024-06-04 14:57:05,121 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 228 transitions, 2619 flow [2024-06-04 14:57:05,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:05,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:05,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:57:05,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-04 14:57:05,122 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)] === [2024-06-04 14:57:05,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:05,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1736721262, now seen corresponding path program 6 times [2024-06-04 14:57:05,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:05,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127447122] [2024-06-04 14:57:05,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:05,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:05,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:57:06,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:57:06,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:57:06,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127447122] [2024-06-04 14:57:06,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127447122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:57:06,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:57:06,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:57:06,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665315717] [2024-06-04 14:57:06,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:57:06,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:57:06,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:57:06,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:57:06,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:57:06,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:57:06,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 228 transitions, 2619 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:06,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:57:06,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:57:06,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:06,964 INFO L124 PetriNetUnfolderBase]: 3369/4939 cut-off events. [2024-06-04 14:57:06,964 INFO L125 PetriNetUnfolderBase]: For 336344/336353 co-relation queries the response was YES. [2024-06-04 14:57:06,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41264 conditions, 4939 events. 3369/4939 cut-off events. For 336344/336353 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 23835 event pairs, 824 based on Foata normal form. 8/4944 useless extension candidates. Maximal degree in co-relation 41183. Up to 4006 conditions per place. [2024-06-04 14:57:07,007 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 163 selfloop transitions, 107 changer transitions 0/273 dead transitions. [2024-06-04 14:57:07,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 273 transitions, 3768 flow [2024-06-04 14:57:07,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:57:07,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:57:07,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-04 14:57:07,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45202020202020204 [2024-06-04 14:57:07,008 INFO L175 Difference]: Start difference. First operand has 177 places, 228 transitions, 2619 flow. Second operand 9 states and 179 transitions. [2024-06-04 14:57:07,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 273 transitions, 3768 flow [2024-06-04 14:57:07,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 273 transitions, 3634 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-04 14:57:07,277 INFO L231 Difference]: Finished difference. Result has 180 places, 232 transitions, 2807 flow [2024-06-04 14:57:07,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2485, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2807, PETRI_PLACES=180, PETRI_TRANSITIONS=232} [2024-06-04 14:57:07,278 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 135 predicate places. [2024-06-04 14:57:07,278 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 232 transitions, 2807 flow [2024-06-04 14:57:07,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:07,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:07,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:57:07,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-04 14:57:07,279 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:57:07,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:07,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1945906157, now seen corresponding path program 1 times [2024-06-04 14:57:07,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:07,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95722504] [2024-06-04 14:57:07,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:07,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:07,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:57:07,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:57:07,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:57:07,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95722504] [2024-06-04 14:57:07,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95722504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:57:07,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:57:07,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:57:07,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322630386] [2024-06-04 14:57:07,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:57:07,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:57:07,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:57:07,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:57:07,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:57:08,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:57:08,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 232 transitions, 2807 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 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) [2024-06-04 14:57:08,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:57:08,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:57:08,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:08,742 INFO L124 PetriNetUnfolderBase]: 3028/4575 cut-off events. [2024-06-04 14:57:08,742 INFO L125 PetriNetUnfolderBase]: For 349375/349399 co-relation queries the response was YES. [2024-06-04 14:57:08,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40273 conditions, 4575 events. 3028/4575 cut-off events. For 349375/349399 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 23085 event pairs, 901 based on Foata normal form. 1/4559 useless extension candidates. Maximal degree in co-relation 40191. Up to 4228 conditions per place. [2024-06-04 14:57:08,785 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 201 selfloop transitions, 16 changer transitions 0/251 dead transitions. [2024-06-04 14:57:08,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 251 transitions, 3417 flow [2024-06-04 14:57:08,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:57:08,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:57:08,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-06-04 14:57:08,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-04 14:57:08,786 INFO L175 Difference]: Start difference. First operand has 180 places, 232 transitions, 2807 flow. Second operand 6 states and 117 transitions. [2024-06-04 14:57:08,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 251 transitions, 3417 flow [2024-06-04 14:57:09,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 251 transitions, 3217 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-04 14:57:09,103 INFO L231 Difference]: Finished difference. Result has 181 places, 235 transitions, 2699 flow [2024-06-04 14:57:09,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2608, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2699, PETRI_PLACES=181, PETRI_TRANSITIONS=235} [2024-06-04 14:57:09,104 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 136 predicate places. [2024-06-04 14:57:09,104 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 235 transitions, 2699 flow [2024-06-04 14:57:09,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 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) [2024-06-04 14:57:09,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:09,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:57:09,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-04 14:57:09,104 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)] === [2024-06-04 14:57:09,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:09,105 INFO L85 PathProgramCache]: Analyzing trace with hash -2092227124, now seen corresponding path program 2 times [2024-06-04 14:57:09,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:09,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267870022] [2024-06-04 14:57:09,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:09,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:09,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:57:10,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:57:10,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:57:10,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267870022] [2024-06-04 14:57:10,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267870022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:57:10,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:57:10,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:57:10,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798431438] [2024-06-04 14:57:10,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:57:10,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:57:10,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:57:10,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:57:10,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:57:10,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:57:10,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 235 transitions, 2699 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:10,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:57:10,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:57:10,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:11,016 INFO L124 PetriNetUnfolderBase]: 3229/4800 cut-off events. [2024-06-04 14:57:11,016 INFO L125 PetriNetUnfolderBase]: For 367134/367150 co-relation queries the response was YES. [2024-06-04 14:57:11,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41276 conditions, 4800 events. 3229/4800 cut-off events. For 367134/367150 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 23794 event pairs, 875 based on Foata normal form. 6/4778 useless extension candidates. Maximal degree in co-relation 41193. Up to 4502 conditions per place. [2024-06-04 14:57:11,062 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 218 selfloop transitions, 28 changer transitions 0/264 dead transitions. [2024-06-04 14:57:11,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 264 transitions, 3431 flow [2024-06-04 14:57:11,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:57:11,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:57:11,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-04 14:57:11,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289772727272727 [2024-06-04 14:57:11,064 INFO L175 Difference]: Start difference. First operand has 181 places, 235 transitions, 2699 flow. Second operand 8 states and 151 transitions. [2024-06-04 14:57:11,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 264 transitions, 3431 flow [2024-06-04 14:57:11,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 264 transitions, 3338 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-04 14:57:11,395 INFO L231 Difference]: Finished difference. Result has 184 places, 238 transitions, 2768 flow [2024-06-04 14:57:11,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2606, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2768, PETRI_PLACES=184, PETRI_TRANSITIONS=238} [2024-06-04 14:57:11,395 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 139 predicate places. [2024-06-04 14:57:11,395 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 238 transitions, 2768 flow [2024-06-04 14:57:11,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:11,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:11,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:57:11,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-04 14:57:11,396 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)] === [2024-06-04 14:57:11,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:11,397 INFO L85 PathProgramCache]: Analyzing trace with hash 188610494, now seen corresponding path program 3 times [2024-06-04 14:57:11,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:11,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291041687] [2024-06-04 14:57:11,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:11,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:11,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:57:12,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:57:12,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:57:12,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291041687] [2024-06-04 14:57:12,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291041687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:57:12,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:57:12,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:57:12,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513669072] [2024-06-04 14:57:12,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:57:12,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:57:12,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:57:12,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:57:12,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:57:12,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:57:12,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 238 transitions, 2768 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:12,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:57:12,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:57:12,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:13,406 INFO L124 PetriNetUnfolderBase]: 3249/4836 cut-off events. [2024-06-04 14:57:13,406 INFO L125 PetriNetUnfolderBase]: For 385322/385338 co-relation queries the response was YES. [2024-06-04 14:57:13,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42199 conditions, 4836 events. 3249/4836 cut-off events. For 385322/385338 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 23994 event pairs, 894 based on Foata normal form. 6/4814 useless extension candidates. Maximal degree in co-relation 42116. Up to 4574 conditions per place. [2024-06-04 14:57:13,452 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 225 selfloop transitions, 24 changer transitions 0/267 dead transitions. [2024-06-04 14:57:13,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 267 transitions, 3516 flow [2024-06-04 14:57:13,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:57:13,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:57:13,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-04 14:57:13,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-04 14:57:13,453 INFO L175 Difference]: Start difference. First operand has 184 places, 238 transitions, 2768 flow. Second operand 8 states and 150 transitions. [2024-06-04 14:57:13,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 267 transitions, 3516 flow [2024-06-04 14:57:13,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 267 transitions, 3378 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-04 14:57:13,820 INFO L231 Difference]: Finished difference. Result has 186 places, 241 transitions, 2790 flow [2024-06-04 14:57:13,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2630, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2790, PETRI_PLACES=186, PETRI_TRANSITIONS=241} [2024-06-04 14:57:13,820 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 141 predicate places. [2024-06-04 14:57:13,820 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 241 transitions, 2790 flow [2024-06-04 14:57:13,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:13,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:13,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:57:13,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-04 14:57:13,821 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)] === [2024-06-04 14:57:13,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:13,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1907164782, now seen corresponding path program 4 times [2024-06-04 14:57:13,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:13,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530519417] [2024-06-04 14:57:13,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:13,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:13,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:57:14,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:57:14,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:57:14,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530519417] [2024-06-04 14:57:14,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530519417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:57:14,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:57:14,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:57:14,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853576774] [2024-06-04 14:57:14,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:57:14,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:57:14,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:57:14,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:57:14,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:57:14,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:57:14,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 241 transitions, 2790 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:14,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:57:14,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:57:14,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:15,947 INFO L124 PetriNetUnfolderBase]: 3274/4872 cut-off events. [2024-06-04 14:57:15,947 INFO L125 PetriNetUnfolderBase]: For 404109/404130 co-relation queries the response was YES. [2024-06-04 14:57:15,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42989 conditions, 4872 events. 3274/4872 cut-off events. For 404109/404130 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 24234 event pairs, 886 based on Foata normal form. 6/4841 useless extension candidates. Maximal degree in co-relation 42905. Up to 4558 conditions per place. [2024-06-04 14:57:15,990 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 224 selfloop transitions, 30 changer transitions 0/272 dead transitions. [2024-06-04 14:57:15,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 272 transitions, 3650 flow [2024-06-04 14:57:15,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:57:15,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:57:15,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-04 14:57:15,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-04 14:57:15,993 INFO L175 Difference]: Start difference. First operand has 186 places, 241 transitions, 2790 flow. Second operand 8 states and 153 transitions. [2024-06-04 14:57:15,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 272 transitions, 3650 flow [2024-06-04 14:57:16,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 272 transitions, 3514 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-04 14:57:16,282 INFO L231 Difference]: Finished difference. Result has 188 places, 244 transitions, 2832 flow [2024-06-04 14:57:16,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2654, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2832, PETRI_PLACES=188, PETRI_TRANSITIONS=244} [2024-06-04 14:57:16,283 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 143 predicate places. [2024-06-04 14:57:16,283 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 244 transitions, 2832 flow [2024-06-04 14:57:16,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:16,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:16,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:57:16,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-04 14:57:16,284 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)] === [2024-06-04 14:57:16,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:16,284 INFO L85 PathProgramCache]: Analyzing trace with hash -2102414344, now seen corresponding path program 5 times [2024-06-04 14:57:16,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:16,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944457417] [2024-06-04 14:57:16,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:16,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:16,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:57:17,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:57:17,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:57:17,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944457417] [2024-06-04 14:57:17,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944457417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:57:17,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:57:17,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:57:17,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243854734] [2024-06-04 14:57:17,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:57:17,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:57:17,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:57:17,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:57:17,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:57:17,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:57:17,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 244 transitions, 2832 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:17,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:57:17,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:57:17,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:18,319 INFO L124 PetriNetUnfolderBase]: 3294/4899 cut-off events. [2024-06-04 14:57:18,319 INFO L125 PetriNetUnfolderBase]: For 418601/418622 co-relation queries the response was YES. [2024-06-04 14:57:18,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43589 conditions, 4899 events. 3294/4899 cut-off events. For 418601/418622 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 24362 event pairs, 889 based on Foata normal form. 6/4868 useless extension candidates. Maximal degree in co-relation 43504. Up to 4578 conditions per place. [2024-06-04 14:57:18,363 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 219 selfloop transitions, 36 changer transitions 0/273 dead transitions. [2024-06-04 14:57:18,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 273 transitions, 3608 flow [2024-06-04 14:57:18,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:57:18,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:57:18,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-04 14:57:18,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-04 14:57:18,364 INFO L175 Difference]: Start difference. First operand has 188 places, 244 transitions, 2832 flow. Second operand 8 states and 152 transitions. [2024-06-04 14:57:18,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 273 transitions, 3608 flow [2024-06-04 14:57:18,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 273 transitions, 3454 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-04 14:57:18,702 INFO L231 Difference]: Finished difference. Result has 190 places, 247 transitions, 2878 flow [2024-06-04 14:57:18,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2678, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2878, PETRI_PLACES=190, PETRI_TRANSITIONS=247} [2024-06-04 14:57:18,702 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 145 predicate places. [2024-06-04 14:57:18,702 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 247 transitions, 2878 flow [2024-06-04 14:57:18,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:18,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:18,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:57:18,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-04 14:57:18,703 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)] === [2024-06-04 14:57:18,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:18,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1410105952, now seen corresponding path program 7 times [2024-06-04 14:57:18,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:18,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462951988] [2024-06-04 14:57:18,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:18,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:18,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:57:19,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:57:19,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:57:19,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462951988] [2024-06-04 14:57:19,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462951988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:57:19,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:57:19,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:57:19,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129551303] [2024-06-04 14:57:19,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:57:19,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:57:19,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:57:19,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:57:19,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:57:19,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:57:19,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 247 transitions, 2878 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:19,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:57:19,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:57:19,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:20,583 INFO L124 PetriNetUnfolderBase]: 3497/5134 cut-off events. [2024-06-04 14:57:20,584 INFO L125 PetriNetUnfolderBase]: For 430958/430958 co-relation queries the response was YES. [2024-06-04 14:57:20,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45171 conditions, 5134 events. 3497/5134 cut-off events. For 430958/430958 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 24968 event pairs, 913 based on Foata normal form. 6/5138 useless extension candidates. Maximal degree in co-relation 45085. Up to 4992 conditions per place. [2024-06-04 14:57:20,632 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 250 selfloop transitions, 29 changer transitions 0/282 dead transitions. [2024-06-04 14:57:20,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 282 transitions, 3714 flow [2024-06-04 14:57:20,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:57:20,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:57:20,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-04 14:57:20,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065656565656566 [2024-06-04 14:57:20,633 INFO L175 Difference]: Start difference. First operand has 190 places, 247 transitions, 2878 flow. Second operand 9 states and 161 transitions. [2024-06-04 14:57:20,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 282 transitions, 3714 flow [2024-06-04 14:57:21,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 282 transitions, 3538 flow, removed 56 selfloop flow, removed 6 redundant places. [2024-06-04 14:57:21,109 INFO L231 Difference]: Finished difference. Result has 193 places, 251 transitions, 2883 flow [2024-06-04 14:57:21,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2706, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2883, PETRI_PLACES=193, PETRI_TRANSITIONS=251} [2024-06-04 14:57:21,109 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 148 predicate places. [2024-06-04 14:57:21,109 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 251 transitions, 2883 flow [2024-06-04 14:57:21,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:21,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:21,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:57:21,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-04 14:57:21,110 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)] === [2024-06-04 14:57:21,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:21,110 INFO L85 PathProgramCache]: Analyzing trace with hash -611106092, now seen corresponding path program 1 times [2024-06-04 14:57:21,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:21,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455040093] [2024-06-04 14:57:21,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:21,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:21,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:57:22,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:57:22,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:57:22,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455040093] [2024-06-04 14:57:22,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455040093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:57:22,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:57:22,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:57:22,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245634787] [2024-06-04 14:57:22,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:57:22,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:57:22,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:57:22,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:57:22,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:57:22,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:57:22,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 251 transitions, 2883 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:22,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:57:22,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:57:22,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:23,057 INFO L124 PetriNetUnfolderBase]: 3499/5137 cut-off events. [2024-06-04 14:57:23,057 INFO L125 PetriNetUnfolderBase]: For 426674/426674 co-relation queries the response was YES. [2024-06-04 14:57:23,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44660 conditions, 5137 events. 3499/5137 cut-off events. For 426674/426674 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 25002 event pairs, 905 based on Foata normal form. 3/5138 useless extension candidates. Maximal degree in co-relation 44573. Up to 4983 conditions per place. [2024-06-04 14:57:23,106 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 240 selfloop transitions, 38 changer transitions 0/281 dead transitions. [2024-06-04 14:57:23,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 281 transitions, 3713 flow [2024-06-04 14:57:23,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:57:23,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:57:23,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-04 14:57:23,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4147727272727273 [2024-06-04 14:57:23,107 INFO L175 Difference]: Start difference. First operand has 193 places, 251 transitions, 2883 flow. Second operand 8 states and 146 transitions. [2024-06-04 14:57:23,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 281 transitions, 3713 flow [2024-06-04 14:57:23,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 281 transitions, 3584 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-04 14:57:23,520 INFO L231 Difference]: Finished difference. Result has 194 places, 255 transitions, 2966 flow [2024-06-04 14:57:23,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2754, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2966, PETRI_PLACES=194, PETRI_TRANSITIONS=255} [2024-06-04 14:57:23,520 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 149 predicate places. [2024-06-04 14:57:23,520 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 255 transitions, 2966 flow [2024-06-04 14:57:23,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:23,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:23,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:57:23,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-04 14:57:23,521 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)] === [2024-06-04 14:57:23,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:23,521 INFO L85 PathProgramCache]: Analyzing trace with hash -619446580, now seen corresponding path program 8 times [2024-06-04 14:57:23,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:23,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288440523] [2024-06-04 14:57:23,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:23,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:23,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:57:24,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:57:24,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:57:24,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288440523] [2024-06-04 14:57:24,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288440523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:57:24,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:57:24,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:57:24,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555376696] [2024-06-04 14:57:24,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:57:24,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:57:24,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:57:24,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:57:24,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:57:24,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:57:24,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 255 transitions, 2966 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:24,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:57:24,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:57:24,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:25,499 INFO L124 PetriNetUnfolderBase]: 3551/5211 cut-off events. [2024-06-04 14:57:25,499 INFO L125 PetriNetUnfolderBase]: For 450940/450940 co-relation queries the response was YES. [2024-06-04 14:57:25,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46011 conditions, 5211 events. 3551/5211 cut-off events. For 450940/450940 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 25379 event pairs, 912 based on Foata normal form. 6/5215 useless extension candidates. Maximal degree in co-relation 45923. Up to 4781 conditions per place. [2024-06-04 14:57:25,550 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 244 selfloop transitions, 54 changer transitions 0/301 dead transitions. [2024-06-04 14:57:25,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 301 transitions, 4304 flow [2024-06-04 14:57:25,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:57:25,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:57:25,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-04 14:57:25,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292929292929293 [2024-06-04 14:57:25,551 INFO L175 Difference]: Start difference. First operand has 194 places, 255 transitions, 2966 flow. Second operand 9 states and 170 transitions. [2024-06-04 14:57:25,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 301 transitions, 4304 flow [2024-06-04 14:57:25,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 301 transitions, 4144 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-04 14:57:25,922 INFO L231 Difference]: Finished difference. Result has 198 places, 266 transitions, 3240 flow [2024-06-04 14:57:25,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2806, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3240, PETRI_PLACES=198, PETRI_TRANSITIONS=266} [2024-06-04 14:57:25,922 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 153 predicate places. [2024-06-04 14:57:25,922 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 266 transitions, 3240 flow [2024-06-04 14:57:25,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:25,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:25,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:57:25,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-04 14:57:25,923 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)] === [2024-06-04 14:57:25,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:25,923 INFO L85 PathProgramCache]: Analyzing trace with hash -619677220, now seen corresponding path program 9 times [2024-06-04 14:57:25,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:25,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331998699] [2024-06-04 14:57:25,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:25,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:25,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:57:26,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:57:26,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:57:26,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331998699] [2024-06-04 14:57:26,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331998699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:57:26,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:57:26,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:57:26,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017259013] [2024-06-04 14:57:26,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:57:26,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:57:26,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:57:26,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:57:26,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:57:26,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:57:26,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 266 transitions, 3240 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:26,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:57:26,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:57:26,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:27,878 INFO L124 PetriNetUnfolderBase]: 3587/5263 cut-off events. [2024-06-04 14:57:27,878 INFO L125 PetriNetUnfolderBase]: For 476419/476419 co-relation queries the response was YES. [2024-06-04 14:57:27,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47238 conditions, 5263 events. 3587/5263 cut-off events. For 476419/476419 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 25657 event pairs, 885 based on Foata normal form. 6/5267 useless extension candidates. Maximal degree in co-relation 47148. Up to 4811 conditions per place. [2024-06-04 14:57:27,931 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 247 selfloop transitions, 56 changer transitions 0/306 dead transitions. [2024-06-04 14:57:27,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 306 transitions, 4535 flow [2024-06-04 14:57:27,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:57:27,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:57:27,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-04 14:57:27,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292929292929293 [2024-06-04 14:57:27,932 INFO L175 Difference]: Start difference. First operand has 198 places, 266 transitions, 3240 flow. Second operand 9 states and 170 transitions. [2024-06-04 14:57:27,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 306 transitions, 4535 flow [2024-06-04 14:57:28,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 306 transitions, 4389 flow, removed 62 selfloop flow, removed 4 redundant places. [2024-06-04 14:57:28,338 INFO L231 Difference]: Finished difference. Result has 203 places, 270 transitions, 3336 flow [2024-06-04 14:57:28,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3106, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3336, PETRI_PLACES=203, PETRI_TRANSITIONS=270} [2024-06-04 14:57:28,338 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 158 predicate places. [2024-06-04 14:57:28,338 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 270 transitions, 3336 flow [2024-06-04 14:57:28,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:28,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:28,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:57:28,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-04 14:57:28,339 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)] === [2024-06-04 14:57:28,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:28,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1418386858, now seen corresponding path program 5 times [2024-06-04 14:57:28,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:28,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158715858] [2024-06-04 14:57:28,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:28,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:28,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:57:29,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:57:29,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:57:29,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158715858] [2024-06-04 14:57:29,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158715858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:57:29,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:57:29,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:57:29,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159962501] [2024-06-04 14:57:29,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:57:29,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:57:29,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:57:29,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:57:29,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:57:29,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:57:29,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 270 transitions, 3336 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:29,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:57:29,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:57:29,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:30,236 INFO L124 PetriNetUnfolderBase]: 3367/5040 cut-off events. [2024-06-04 14:57:30,236 INFO L125 PetriNetUnfolderBase]: For 473263/473323 co-relation queries the response was YES. [2024-06-04 14:57:30,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45803 conditions, 5040 events. 3367/5040 cut-off events. For 473263/473323 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 25360 event pairs, 856 based on Foata normal form. 6/5033 useless extension candidates. Maximal degree in co-relation 45711. Up to 4666 conditions per place. [2024-06-04 14:57:30,370 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 228 selfloop transitions, 20 changer transitions 0/297 dead transitions. [2024-06-04 14:57:30,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 297 transitions, 3900 flow [2024-06-04 14:57:30,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:57:30,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:57:30,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-04 14:57:30,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.398989898989899 [2024-06-04 14:57:30,372 INFO L175 Difference]: Start difference. First operand has 203 places, 270 transitions, 3336 flow. Second operand 9 states and 158 transitions. [2024-06-04 14:57:30,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 297 transitions, 3900 flow [2024-06-04 14:57:30,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 297 transitions, 3674 flow, removed 62 selfloop flow, removed 7 redundant places. [2024-06-04 14:57:30,786 INFO L231 Difference]: Finished difference. Result has 205 places, 270 transitions, 3158 flow [2024-06-04 14:57:30,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3110, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3158, PETRI_PLACES=205, PETRI_TRANSITIONS=270} [2024-06-04 14:57:30,786 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 160 predicate places. [2024-06-04 14:57:30,786 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 270 transitions, 3158 flow [2024-06-04 14:57:30,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:30,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:30,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:57:30,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-04 14:57:30,787 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)] === [2024-06-04 14:57:30,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:30,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1906918704, now seen corresponding path program 10 times [2024-06-04 14:57:30,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:30,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389588422] [2024-06-04 14:57:30,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:30,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:30,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:57:31,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:57:31,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:57:31,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389588422] [2024-06-04 14:57:31,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389588422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:57:31,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:57:31,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:57:31,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319902174] [2024-06-04 14:57:31,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:57:31,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:57:31,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:57:31,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:57:31,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:57:31,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:57:31,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 270 transitions, 3158 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:31,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:57:31,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:57:31,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:32,746 INFO L124 PetriNetUnfolderBase]: 3570/5240 cut-off events. [2024-06-04 14:57:32,746 INFO L125 PetriNetUnfolderBase]: For 491336/491336 co-relation queries the response was YES. [2024-06-04 14:57:32,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46794 conditions, 5240 events. 3570/5240 cut-off events. For 491336/491336 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 25504 event pairs, 883 based on Foata normal form. 6/5244 useless extension candidates. Maximal degree in co-relation 46702. Up to 4798 conditions per place. [2024-06-04 14:57:32,798 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 246 selfloop transitions, 56 changer transitions 0/305 dead transitions. [2024-06-04 14:57:32,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 305 transitions, 4254 flow [2024-06-04 14:57:32,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:57:32,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:57:32,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-04 14:57:32,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-04 14:57:32,799 INFO L175 Difference]: Start difference. First operand has 205 places, 270 transitions, 3158 flow. Second operand 9 states and 168 transitions. [2024-06-04 14:57:32,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 305 transitions, 4254 flow [2024-06-04 14:57:33,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 305 transitions, 4070 flow, removed 40 selfloop flow, removed 10 redundant places. [2024-06-04 14:57:33,255 INFO L231 Difference]: Finished difference. Result has 204 places, 270 transitions, 3096 flow [2024-06-04 14:57:33,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2974, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3096, PETRI_PLACES=204, PETRI_TRANSITIONS=270} [2024-06-04 14:57:33,256 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 159 predicate places. [2024-06-04 14:57:33,256 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 270 transitions, 3096 flow [2024-06-04 14:57:33,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:33,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:33,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:57:33,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-04 14:57:33,256 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:57:33,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:33,257 INFO L85 PathProgramCache]: Analyzing trace with hash -761870129, now seen corresponding path program 2 times [2024-06-04 14:57:33,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:33,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470297680] [2024-06-04 14:57:33,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:33,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:33,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:57:33,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:57:33,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:57:33,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470297680] [2024-06-04 14:57:33,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470297680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:57:33,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:57:33,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:57:33,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303336750] [2024-06-04 14:57:33,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:57:33,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:57:33,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:57:33,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:57:33,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:57:33,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:57:33,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 270 transitions, 3096 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 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) [2024-06-04 14:57:33,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:57:33,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:57:33,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:34,765 INFO L124 PetriNetUnfolderBase]: 3188/4833 cut-off events. [2024-06-04 14:57:34,765 INFO L125 PetriNetUnfolderBase]: For 493056/493080 co-relation queries the response was YES. [2024-06-04 14:57:34,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45074 conditions, 4833 events. 3188/4833 cut-off events. For 493056/493080 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 24799 event pairs, 882 based on Foata normal form. 1/4817 useless extension candidates. Maximal degree in co-relation 44981. Up to 4446 conditions per place. [2024-06-04 14:57:34,816 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 228 selfloop transitions, 11 changer transitions 0/279 dead transitions. [2024-06-04 14:57:34,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 279 transitions, 3596 flow [2024-06-04 14:57:34,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:57:34,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:57:34,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-04 14:57:34,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-04 14:57:34,817 INFO L175 Difference]: Start difference. First operand has 204 places, 270 transitions, 3096 flow. Second operand 6 states and 108 transitions. [2024-06-04 14:57:34,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 279 transitions, 3596 flow [2024-06-04 14:57:35,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 279 transitions, 3479 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-04 14:57:35,253 INFO L231 Difference]: Finished difference. Result has 203 places, 270 transitions, 3007 flow [2024-06-04 14:57:35,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2979, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3007, PETRI_PLACES=203, PETRI_TRANSITIONS=270} [2024-06-04 14:57:35,254 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 158 predicate places. [2024-06-04 14:57:35,254 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 270 transitions, 3007 flow [2024-06-04 14:57:35,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 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) [2024-06-04 14:57:35,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:35,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:57:35,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-04 14:57:35,255 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:57:35,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:35,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1953532653, now seen corresponding path program 1 times [2024-06-04 14:57:35,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:35,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069623840] [2024-06-04 14:57:35,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:35,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:35,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:57:35,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:57:35,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:57:35,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069623840] [2024-06-04 14:57:35,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069623840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:57:35,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:57:35,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:57:35,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820924513] [2024-06-04 14:57:35,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:57:35,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:57:35,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:57:35,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:57:35,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:57:35,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:57:35,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 270 transitions, 3007 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 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) [2024-06-04 14:57:35,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:57:35,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:57:35,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:36,943 INFO L124 PetriNetUnfolderBase]: 3360/5005 cut-off events. [2024-06-04 14:57:36,943 INFO L125 PetriNetUnfolderBase]: For 508689/508713 co-relation queries the response was YES. [2024-06-04 14:57:36,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45927 conditions, 5005 events. 3360/5005 cut-off events. For 508689/508713 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 24984 event pairs, 880 based on Foata normal form. 3/4967 useless extension candidates. Maximal degree in co-relation 45833. Up to 4766 conditions per place. [2024-06-04 14:57:36,990 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 243 selfloop transitions, 24 changer transitions 0/286 dead transitions. [2024-06-04 14:57:36,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 286 transitions, 3719 flow [2024-06-04 14:57:36,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:57:36,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:57:36,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-04 14:57:36,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42803030303030304 [2024-06-04 14:57:36,991 INFO L175 Difference]: Start difference. First operand has 203 places, 270 transitions, 3007 flow. Second operand 6 states and 113 transitions. [2024-06-04 14:57:36,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 286 transitions, 3719 flow [2024-06-04 14:57:37,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 286 transitions, 3687 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-04 14:57:37,378 INFO L231 Difference]: Finished difference. Result has 204 places, 273 transitions, 3078 flow [2024-06-04 14:57:37,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2975, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3078, PETRI_PLACES=204, PETRI_TRANSITIONS=273} [2024-06-04 14:57:37,378 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 159 predicate places. [2024-06-04 14:57:37,378 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 273 transitions, 3078 flow [2024-06-04 14:57:37,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 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) [2024-06-04 14:57:37,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:37,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:57:37,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-04 14:57:37,379 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:57:37,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:37,379 INFO L85 PathProgramCache]: Analyzing trace with hash -760449523, now seen corresponding path program 2 times [2024-06-04 14:57:37,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:37,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471735127] [2024-06-04 14:57:37,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:37,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:37,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:57:37,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:57:37,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:57:37,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471735127] [2024-06-04 14:57:37,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471735127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:57:37,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:57:37,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:57:37,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545639904] [2024-06-04 14:57:37,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:57:37,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:57:37,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:57:37,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:57:37,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:57:38,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:57:38,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 273 transitions, 3078 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 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) [2024-06-04 14:57:38,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:57:38,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:57:38,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:38,955 INFO L124 PetriNetUnfolderBase]: 3326/4953 cut-off events. [2024-06-04 14:57:38,956 INFO L125 PetriNetUnfolderBase]: For 520689/520719 co-relation queries the response was YES. [2024-06-04 14:57:38,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45925 conditions, 4953 events. 3326/4953 cut-off events. For 520689/520719 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 24671 event pairs, 891 based on Foata normal form. 2/4913 useless extension candidates. Maximal degree in co-relation 45830. Up to 4719 conditions per place. [2024-06-04 14:57:39,006 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 238 selfloop transitions, 25 changer transitions 0/282 dead transitions. [2024-06-04 14:57:39,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 282 transitions, 3626 flow [2024-06-04 14:57:39,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:57:39,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:57:39,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-04 14:57:39,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-04 14:57:39,007 INFO L175 Difference]: Start difference. First operand has 204 places, 273 transitions, 3078 flow. Second operand 6 states and 110 transitions. [2024-06-04 14:57:39,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 282 transitions, 3626 flow [2024-06-04 14:57:39,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 282 transitions, 3574 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-04 14:57:39,418 INFO L231 Difference]: Finished difference. Result has 206 places, 273 transitions, 3082 flow [2024-06-04 14:57:39,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3026, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3082, PETRI_PLACES=206, PETRI_TRANSITIONS=273} [2024-06-04 14:57:39,419 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 161 predicate places. [2024-06-04 14:57:39,419 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 273 transitions, 3082 flow [2024-06-04 14:57:39,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 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) [2024-06-04 14:57:39,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:39,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:57:39,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-04 14:57:39,419 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)] === [2024-06-04 14:57:39,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:39,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1331011221, now seen corresponding path program 1 times [2024-06-04 14:57:39,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:39,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933725968] [2024-06-04 14:57:39,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:39,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:39,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:57:40,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:57:40,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:57:40,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933725968] [2024-06-04 14:57:40,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933725968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:57:40,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:57:40,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:57:40,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154451199] [2024-06-04 14:57:40,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:57:40,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:57:40,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:57:40,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:57:40,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:57:40,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:57:40,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 273 transitions, 3082 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:40,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:57:40,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:57:40,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:41,902 INFO L124 PetriNetUnfolderBase]: 3331/4986 cut-off events. [2024-06-04 14:57:41,902 INFO L125 PetriNetUnfolderBase]: For 535780/535824 co-relation queries the response was YES. [2024-06-04 14:57:41,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46189 conditions, 4986 events. 3331/4986 cut-off events. For 535780/535824 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 24945 event pairs, 831 based on Foata normal form. 2/4978 useless extension candidates. Maximal degree in co-relation 46093. Up to 4571 conditions per place. [2024-06-04 14:57:41,956 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 250 selfloop transitions, 26 changer transitions 0/326 dead transitions. [2024-06-04 14:57:41,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 326 transitions, 3872 flow [2024-06-04 14:57:41,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:57:41,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:57:41,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 205 transitions. [2024-06-04 14:57:41,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42355371900826444 [2024-06-04 14:57:41,957 INFO L175 Difference]: Start difference. First operand has 206 places, 273 transitions, 3082 flow. Second operand 11 states and 205 transitions. [2024-06-04 14:57:41,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 326 transitions, 3872 flow [2024-06-04 14:57:42,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 326 transitions, 3806 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-04 14:57:42,422 INFO L231 Difference]: Finished difference. Result has 212 places, 276 transitions, 3193 flow [2024-06-04 14:57:42,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3016, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3193, PETRI_PLACES=212, PETRI_TRANSITIONS=276} [2024-06-04 14:57:42,422 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 167 predicate places. [2024-06-04 14:57:42,422 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 276 transitions, 3193 flow [2024-06-04 14:57:42,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:42,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:42,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:57:42,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-04 14:57:42,423 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)] === [2024-06-04 14:57:42,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:42,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1091566994, now seen corresponding path program 1 times [2024-06-04 14:57:42,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:42,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173392105] [2024-06-04 14:57:42,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:42,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:42,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:57:43,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:57:43,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:57:43,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173392105] [2024-06-04 14:57:43,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173392105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:57:43,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:57:43,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:57:43,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269725685] [2024-06-04 14:57:43,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:57:43,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:57:43,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:57:43,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:57:43,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:57:43,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:57:43,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 276 transitions, 3193 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:43,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:57:43,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:57:43,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:44,713 INFO L124 PetriNetUnfolderBase]: 3602/5282 cut-off events. [2024-06-04 14:57:44,713 INFO L125 PetriNetUnfolderBase]: For 572499/572499 co-relation queries the response was YES. [2024-06-04 14:57:44,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49197 conditions, 5282 events. 3602/5282 cut-off events. For 572499/572499 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 25737 event pairs, 886 based on Foata normal form. 6/5286 useless extension candidates. Maximal degree in co-relation 49100. Up to 5125 conditions per place. [2024-06-04 14:57:44,767 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 293 selfloop transitions, 40 changer transitions 0/336 dead transitions. [2024-06-04 14:57:44,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 336 transitions, 4683 flow [2024-06-04 14:57:44,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:57:44,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:57:44,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-04 14:57:44,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4340909090909091 [2024-06-04 14:57:44,768 INFO L175 Difference]: Start difference. First operand has 212 places, 276 transitions, 3193 flow. Second operand 10 states and 191 transitions. [2024-06-04 14:57:44,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 336 transitions, 4683 flow [2024-06-04 14:57:45,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 336 transitions, 4532 flow, removed 52 selfloop flow, removed 9 redundant places. [2024-06-04 14:57:45,258 INFO L231 Difference]: Finished difference. Result has 215 places, 287 transitions, 3418 flow [2024-06-04 14:57:45,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3042, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3418, PETRI_PLACES=215, PETRI_TRANSITIONS=287} [2024-06-04 14:57:45,258 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 170 predicate places. [2024-06-04 14:57:45,258 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 287 transitions, 3418 flow [2024-06-04 14:57:45,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:45,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:45,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:57:45,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-04 14:57:45,259 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:57:45,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:45,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1095291644, now seen corresponding path program 2 times [2024-06-04 14:57:45,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:45,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533250585] [2024-06-04 14:57:45,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:45,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:45,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:57:46,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:57:46,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:57:46,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533250585] [2024-06-04 14:57:46,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533250585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:57:46,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:57:46,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:57:46,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009182384] [2024-06-04 14:57:46,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:57:46,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:57:46,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:57:46,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:57:46,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:57:46,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:57:46,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 287 transitions, 3418 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:46,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:57:46,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:57:46,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:47,491 INFO L124 PetriNetUnfolderBase]: 3734/5470 cut-off events. [2024-06-04 14:57:47,491 INFO L125 PetriNetUnfolderBase]: For 622124/622130 co-relation queries the response was YES. [2024-06-04 14:57:47,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52663 conditions, 5470 events. 3734/5470 cut-off events. For 622124/622130 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 26851 event pairs, 729 based on Foata normal form. 7/5474 useless extension candidates. Maximal degree in co-relation 52563. Up to 4044 conditions per place. [2024-06-04 14:57:47,545 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 215 selfloop transitions, 139 changer transitions 0/357 dead transitions. [2024-06-04 14:57:47,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 357 transitions, 5542 flow [2024-06-04 14:57:47,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:57:47,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:57:47,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-06-04 14:57:47,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681818181818182 [2024-06-04 14:57:47,546 INFO L175 Difference]: Start difference. First operand has 215 places, 287 transitions, 3418 flow. Second operand 10 states and 206 transitions. [2024-06-04 14:57:47,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 357 transitions, 5542 flow [2024-06-04 14:57:48,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 357 transitions, 5028 flow, removed 89 selfloop flow, removed 10 redundant places. [2024-06-04 14:57:48,233 INFO L231 Difference]: Finished difference. Result has 217 places, 302 transitions, 3647 flow [2024-06-04 14:57:48,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2904, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3647, PETRI_PLACES=217, PETRI_TRANSITIONS=302} [2024-06-04 14:57:48,234 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 172 predicate places. [2024-06-04 14:57:48,234 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 302 transitions, 3647 flow [2024-06-04 14:57:48,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:48,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:48,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:57:48,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-04 14:57:48,234 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:57:48,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:48,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1095285909, now seen corresponding path program 2 times [2024-06-04 14:57:48,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:48,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358221485] [2024-06-04 14:57:48,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:48,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:48,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:57:49,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:57:49,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:57:49,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358221485] [2024-06-04 14:57:49,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358221485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:57:49,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:57:49,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:57:49,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86493569] [2024-06-04 14:57:49,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:57:49,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:57:49,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:57:49,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:57:49,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:57:49,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:57:49,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 302 transitions, 3647 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:49,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:57:49,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:57:49,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:50,634 INFO L124 PetriNetUnfolderBase]: 3557/5298 cut-off events. [2024-06-04 14:57:50,634 INFO L125 PetriNetUnfolderBase]: For 638521/638573 co-relation queries the response was YES. [2024-06-04 14:57:50,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52700 conditions, 5298 events. 3557/5298 cut-off events. For 638521/638573 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 26716 event pairs, 858 based on Foata normal form. 6/5293 useless extension candidates. Maximal degree in co-relation 52597. Up to 4743 conditions per place. [2024-06-04 14:57:50,687 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 230 selfloop transitions, 58 changer transitions 0/345 dead transitions. [2024-06-04 14:57:50,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 345 transitions, 4451 flow [2024-06-04 14:57:50,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:57:50,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:57:50,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-04 14:57:50,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42954545454545456 [2024-06-04 14:57:50,688 INFO L175 Difference]: Start difference. First operand has 217 places, 302 transitions, 3647 flow. Second operand 10 states and 189 transitions. [2024-06-04 14:57:50,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 345 transitions, 4451 flow [2024-06-04 14:57:51,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 345 transitions, 4159 flow, removed 103 selfloop flow, removed 4 redundant places. [2024-06-04 14:57:51,249 INFO L231 Difference]: Finished difference. Result has 223 places, 305 transitions, 3611 flow [2024-06-04 14:57:51,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3359, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3611, PETRI_PLACES=223, PETRI_TRANSITIONS=305} [2024-06-04 14:57:51,250 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 178 predicate places. [2024-06-04 14:57:51,250 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 305 transitions, 3611 flow [2024-06-04 14:57:51,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:51,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:51,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:57:51,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-04 14:57:51,250 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:57:51,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:51,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1095286064, now seen corresponding path program 3 times [2024-06-04 14:57:51,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:51,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198778975] [2024-06-04 14:57:51,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:51,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:51,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:57:52,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:57:52,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:57:52,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198778975] [2024-06-04 14:57:52,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198778975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:57:52,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:57:52,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:57:52,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246421119] [2024-06-04 14:57:52,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:57:52,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:57:52,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:57:52,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:57:52,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:57:52,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:57:52,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 305 transitions, 3611 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:52,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:57:52,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:57:52,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:53,447 INFO L124 PetriNetUnfolderBase]: 3733/5470 cut-off events. [2024-06-04 14:57:53,447 INFO L125 PetriNetUnfolderBase]: For 651679/651685 co-relation queries the response was YES. [2024-06-04 14:57:53,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53207 conditions, 5470 events. 3733/5470 cut-off events. For 651679/651685 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 26826 event pairs, 746 based on Foata normal form. 7/5474 useless extension candidates. Maximal degree in co-relation 53102. Up to 4054 conditions per place. [2024-06-04 14:57:53,510 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 222 selfloop transitions, 134 changer transitions 0/359 dead transitions. [2024-06-04 14:57:53,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 359 transitions, 5265 flow [2024-06-04 14:57:53,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:57:53,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:57:53,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2024-06-04 14:57:53,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2024-06-04 14:57:53,511 INFO L175 Difference]: Start difference. First operand has 223 places, 305 transitions, 3611 flow. Second operand 10 states and 205 transitions. [2024-06-04 14:57:53,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 359 transitions, 5265 flow [2024-06-04 14:57:54,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 359 transitions, 4953 flow, removed 100 selfloop flow, removed 8 redundant places. [2024-06-04 14:57:54,174 INFO L231 Difference]: Finished difference. Result has 225 places, 305 transitions, 3577 flow [2024-06-04 14:57:54,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3299, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3577, PETRI_PLACES=225, PETRI_TRANSITIONS=305} [2024-06-04 14:57:54,174 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 180 predicate places. [2024-06-04 14:57:54,174 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 305 transitions, 3577 flow [2024-06-04 14:57:54,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:54,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:54,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:57:54,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-04 14:57:54,175 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:57:54,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:54,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1478716766, now seen corresponding path program 4 times [2024-06-04 14:57:54,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:54,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630473166] [2024-06-04 14:57:54,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:54,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:54,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:57:55,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:57:55,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:57:55,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630473166] [2024-06-04 14:57:55,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630473166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:57:55,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:57:55,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:57:55,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105346482] [2024-06-04 14:57:55,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:57:55,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:57:55,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:57:55,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:57:55,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:57:55,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:57:55,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 305 transitions, 3577 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:55,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:57:55,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:57:55,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:56,340 INFO L124 PetriNetUnfolderBase]: 3873/5669 cut-off events. [2024-06-04 14:57:56,340 INFO L125 PetriNetUnfolderBase]: For 699879/699885 co-relation queries the response was YES. [2024-06-04 14:57:56,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56575 conditions, 5669 events. 3873/5669 cut-off events. For 699879/699885 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 27948 event pairs, 768 based on Foata normal form. 7/5673 useless extension candidates. Maximal degree in co-relation 56469. Up to 4162 conditions per place. [2024-06-04 14:57:56,403 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 232 selfloop transitions, 136 changer transitions 0/371 dead transitions. [2024-06-04 14:57:56,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 371 transitions, 5923 flow [2024-06-04 14:57:56,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:57:56,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:57:56,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-06-04 14:57:56,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681818181818182 [2024-06-04 14:57:56,404 INFO L175 Difference]: Start difference. First operand has 225 places, 305 transitions, 3577 flow. Second operand 10 states and 206 transitions. [2024-06-04 14:57:56,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 371 transitions, 5923 flow [2024-06-04 14:57:56,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 371 transitions, 5590 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-06-04 14:57:57,000 INFO L231 Difference]: Finished difference. Result has 227 places, 317 transitions, 3923 flow [2024-06-04 14:57:57,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3262, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3923, PETRI_PLACES=227, PETRI_TRANSITIONS=317} [2024-06-04 14:57:57,000 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 182 predicate places. [2024-06-04 14:57:57,000 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 317 transitions, 3923 flow [2024-06-04 14:57:57,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:57,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:57:57,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:57:57,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-04 14:57:57,001 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:57:57,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:57:57,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1478926512, now seen corresponding path program 1 times [2024-06-04 14:57:57,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:57:57,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502468905] [2024-06-04 14:57:57,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:57:57,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:57:57,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:57:58,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:57:58,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:57:58,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502468905] [2024-06-04 14:57:58,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502468905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:57:58,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:57:58,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:57:58,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617676397] [2024-06-04 14:57:58,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:57:58,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:57:58,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:57:58,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:57:58,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:57:58,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:57:58,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 317 transitions, 3923 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:57:58,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:57:58,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:57:58,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:57:59,484 INFO L124 PetriNetUnfolderBase]: 3901/5713 cut-off events. [2024-06-04 14:57:59,484 INFO L125 PetriNetUnfolderBase]: For 734182/734188 co-relation queries the response was YES. [2024-06-04 14:57:59,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57616 conditions, 5713 events. 3901/5713 cut-off events. For 734182/734188 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 28284 event pairs, 801 based on Foata normal form. 7/5717 useless extension candidates. Maximal degree in co-relation 57509. Up to 5174 conditions per place. [2024-06-04 14:57:59,546 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 281 selfloop transitions, 77 changer transitions 0/361 dead transitions. [2024-06-04 14:57:59,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 361 transitions, 5233 flow [2024-06-04 14:57:59,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:57:59,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:57:59,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-04 14:57:59,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-04 14:57:59,547 INFO L175 Difference]: Start difference. First operand has 227 places, 317 transitions, 3923 flow. Second operand 9 states and 176 transitions. [2024-06-04 14:57:59,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 361 transitions, 5233 flow [2024-06-04 14:58:00,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 361 transitions, 4892 flow, removed 81 selfloop flow, removed 5 redundant places. [2024-06-04 14:58:00,262 INFO L231 Difference]: Finished difference. Result has 231 places, 320 transitions, 3876 flow [2024-06-04 14:58:00,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3582, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3876, PETRI_PLACES=231, PETRI_TRANSITIONS=320} [2024-06-04 14:58:00,263 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 186 predicate places. [2024-06-04 14:58:00,263 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 320 transitions, 3876 flow [2024-06-04 14:58:00,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:00,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:58:00,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:58:00,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-04 14:58:00,263 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:58:00,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:58:00,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1478918576, now seen corresponding path program 5 times [2024-06-04 14:58:00,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:58:00,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601668629] [2024-06-04 14:58:00,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:58:00,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:58:00,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:58:01,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:58:01,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:58:01,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601668629] [2024-06-04 14:58:01,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601668629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:58:01,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:58:01,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:58:01,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332611501] [2024-06-04 14:58:01,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:58:01,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:58:01,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:58:01,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:58:01,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:58:01,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:58:01,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 320 transitions, 3876 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:01,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:58:01,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:58:01,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:58:02,483 INFO L124 PetriNetUnfolderBase]: 3905/5719 cut-off events. [2024-06-04 14:58:02,483 INFO L125 PetriNetUnfolderBase]: For 739870/739876 co-relation queries the response was YES. [2024-06-04 14:58:02,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57184 conditions, 5719 events. 3905/5719 cut-off events. For 739870/739876 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 28292 event pairs, 760 based on Foata normal form. 7/5723 useless extension candidates. Maximal degree in co-relation 57076. Up to 4215 conditions per place. [2024-06-04 14:58:02,550 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 220 selfloop transitions, 152 changer transitions 0/375 dead transitions. [2024-06-04 14:58:02,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 375 transitions, 5722 flow [2024-06-04 14:58:02,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:58:02,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:58:02,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-04 14:58:02,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46136363636363636 [2024-06-04 14:58:02,551 INFO L175 Difference]: Start difference. First operand has 231 places, 320 transitions, 3876 flow. Second operand 10 states and 203 transitions. [2024-06-04 14:58:02,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 375 transitions, 5722 flow [2024-06-04 14:58:03,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 375 transitions, 5452 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-06-04 14:58:03,350 INFO L231 Difference]: Finished difference. Result has 234 places, 324 transitions, 4059 flow [2024-06-04 14:58:03,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3606, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4059, PETRI_PLACES=234, PETRI_TRANSITIONS=324} [2024-06-04 14:58:03,350 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 189 predicate places. [2024-06-04 14:58:03,350 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 324 transitions, 4059 flow [2024-06-04 14:58:03,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:03,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:58:03,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:58:03,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-04 14:58:03,351 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:58:03,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:58:03,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1478711031, now seen corresponding path program 3 times [2024-06-04 14:58:03,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:58:03,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601856099] [2024-06-04 14:58:03,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:58:03,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:58:03,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:58:04,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:58:04,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:58:04,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601856099] [2024-06-04 14:58:04,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601856099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:58:04,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:58:04,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:58:04,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407865615] [2024-06-04 14:58:04,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:58:04,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:58:04,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:58:04,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:58:04,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:58:04,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:58:04,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 324 transitions, 4059 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:04,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:58:04,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:58:04,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:58:05,756 INFO L124 PetriNetUnfolderBase]: 3722/5541 cut-off events. [2024-06-04 14:58:05,756 INFO L125 PetriNetUnfolderBase]: For 757389/757443 co-relation queries the response was YES. [2024-06-04 14:58:05,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56545 conditions, 5541 events. 3722/5541 cut-off events. For 757389/757443 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 28119 event pairs, 873 based on Foata normal form. 6/5536 useless extension candidates. Maximal degree in co-relation 56436. Up to 4959 conditions per place. [2024-06-04 14:58:05,820 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 246 selfloop transitions, 56 changer transitions 0/364 dead transitions. [2024-06-04 14:58:05,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 364 transitions, 4893 flow [2024-06-04 14:58:05,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:58:05,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:58:05,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-04 14:58:05,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-04 14:58:05,822 INFO L175 Difference]: Start difference. First operand has 234 places, 324 transitions, 4059 flow. Second operand 10 states and 187 transitions. [2024-06-04 14:58:05,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 364 transitions, 4893 flow [2024-06-04 14:58:06,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 364 transitions, 4520 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-06-04 14:58:06,566 INFO L231 Difference]: Finished difference. Result has 237 places, 327 transitions, 3948 flow [2024-06-04 14:58:06,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3686, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3948, PETRI_PLACES=237, PETRI_TRANSITIONS=327} [2024-06-04 14:58:06,568 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 192 predicate places. [2024-06-04 14:58:06,568 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 327 transitions, 3948 flow [2024-06-04 14:58:06,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:06,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:58:06,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:58:06,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-04 14:58:06,569 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:58:06,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:58:06,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1478711186, now seen corresponding path program 6 times [2024-06-04 14:58:06,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:58:06,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704193888] [2024-06-04 14:58:06,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:58:06,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:58:06,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:58:07,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:58:07,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:58:07,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704193888] [2024-06-04 14:58:07,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704193888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:58:07,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:58:07,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:58:07,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501006344] [2024-06-04 14:58:07,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:58:07,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:58:07,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:58:07,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:58:07,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:58:07,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:58:07,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 327 transitions, 3948 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:07,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:58:07,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:58:07,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:58:08,838 INFO L124 PetriNetUnfolderBase]: 3904/5719 cut-off events. [2024-06-04 14:58:08,838 INFO L125 PetriNetUnfolderBase]: For 778275/778281 co-relation queries the response was YES. [2024-06-04 14:58:08,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57309 conditions, 5719 events. 3904/5719 cut-off events. For 778275/778281 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 28280 event pairs, 773 based on Foata normal form. 7/5723 useless extension candidates. Maximal degree in co-relation 57199. Up to 4225 conditions per place. [2024-06-04 14:58:08,906 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 237 selfloop transitions, 138 changer transitions 0/378 dead transitions. [2024-06-04 14:58:08,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 378 transitions, 5704 flow [2024-06-04 14:58:08,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:58:08,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:58:08,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-04 14:58:08,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46136363636363636 [2024-06-04 14:58:08,908 INFO L175 Difference]: Start difference. First operand has 237 places, 327 transitions, 3948 flow. Second operand 10 states and 203 transitions. [2024-06-04 14:58:08,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 378 transitions, 5704 flow [2024-06-04 14:58:09,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 378 transitions, 5374 flow, removed 111 selfloop flow, removed 8 redundant places. [2024-06-04 14:58:09,888 INFO L231 Difference]: Finished difference. Result has 239 places, 327 transitions, 3904 flow [2024-06-04 14:58:09,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3618, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3904, PETRI_PLACES=239, PETRI_TRANSITIONS=327} [2024-06-04 14:58:09,889 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 194 predicate places. [2024-06-04 14:58:09,889 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 327 transitions, 3904 flow [2024-06-04 14:58:09,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:09,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:58:09,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:58:09,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-04 14:58:09,889 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:58:09,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:58:09,889 INFO L85 PathProgramCache]: Analyzing trace with hash 586493693, now seen corresponding path program 1 times [2024-06-04 14:58:09,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:58:09,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065721240] [2024-06-04 14:58:09,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:58:09,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:58:09,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:58:10,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:58:10,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:58:10,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065721240] [2024-06-04 14:58:10,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065721240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:58:10,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:58:10,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:58:10,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786008767] [2024-06-04 14:58:10,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:58:10,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:58:10,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:58:10,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:58:10,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:58:10,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:58:10,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 327 transitions, 3904 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:10,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:58:10,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:58:10,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:58:11,802 INFO L124 PetriNetUnfolderBase]: 3706/5504 cut-off events. [2024-06-04 14:58:11,802 INFO L125 PetriNetUnfolderBase]: For 784997/785013 co-relation queries the response was YES. [2024-06-04 14:58:11,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56894 conditions, 5504 events. 3706/5504 cut-off events. For 784997/785013 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 27905 event pairs, 903 based on Foata normal form. 1/5474 useless extension candidates. Maximal degree in co-relation 56783. Up to 5223 conditions per place. [2024-06-04 14:58:11,859 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 305 selfloop transitions, 24 changer transitions 0/353 dead transitions. [2024-06-04 14:58:11,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 353 transitions, 4803 flow [2024-06-04 14:58:11,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:58:11,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:58:11,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-04 14:58:11,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-04 14:58:11,860 INFO L175 Difference]: Start difference. First operand has 239 places, 327 transitions, 3904 flow. Second operand 7 states and 132 transitions. [2024-06-04 14:58:11,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 353 transitions, 4803 flow [2024-06-04 14:58:12,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 353 transitions, 4507 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-04 14:58:12,602 INFO L231 Difference]: Finished difference. Result has 237 places, 330 transitions, 3717 flow [2024-06-04 14:58:12,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3612, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3717, PETRI_PLACES=237, PETRI_TRANSITIONS=330} [2024-06-04 14:58:12,603 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 192 predicate places. [2024-06-04 14:58:12,603 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 330 transitions, 3717 flow [2024-06-04 14:58:12,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:12,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:58:12,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:58:12,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-04 14:58:12,604 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:58:12,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:58:12,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1603671342, now seen corresponding path program 2 times [2024-06-04 14:58:12,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:58:12,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288908799] [2024-06-04 14:58:12,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:58:12,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:58:12,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:58:13,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:58:13,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:58:13,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288908799] [2024-06-04 14:58:13,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288908799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:58:13,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:58:13,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:58:13,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356641728] [2024-06-04 14:58:13,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:58:13,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:58:13,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:58:13,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:58:13,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:58:13,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:58:13,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 330 transitions, 3717 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:13,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:58:13,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:58:13,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:58:15,001 INFO L124 PetriNetUnfolderBase]: 3937/5770 cut-off events. [2024-06-04 14:58:15,001 INFO L125 PetriNetUnfolderBase]: For 820149/820155 co-relation queries the response was YES. [2024-06-04 14:58:15,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57942 conditions, 5770 events. 3937/5770 cut-off events. For 820149/820155 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 28598 event pairs, 821 based on Foata normal form. 7/5774 useless extension candidates. Maximal degree in co-relation 57831. Up to 5228 conditions per place. [2024-06-04 14:58:15,061 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 286 selfloop transitions, 81 changer transitions 0/370 dead transitions. [2024-06-04 14:58:15,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 370 transitions, 4945 flow [2024-06-04 14:58:15,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:58:15,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:58:15,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-04 14:58:15,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43686868686868685 [2024-06-04 14:58:15,062 INFO L175 Difference]: Start difference. First operand has 237 places, 330 transitions, 3717 flow. Second operand 9 states and 173 transitions. [2024-06-04 14:58:15,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 370 transitions, 4945 flow [2024-06-04 14:58:15,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 370 transitions, 4877 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-04 14:58:15,747 INFO L231 Difference]: Finished difference. Result has 241 places, 333 transitions, 3961 flow [2024-06-04 14:58:15,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3649, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3961, PETRI_PLACES=241, PETRI_TRANSITIONS=333} [2024-06-04 14:58:15,748 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 196 predicate places. [2024-06-04 14:58:15,748 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 333 transitions, 3961 flow [2024-06-04 14:58:15,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:15,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:58:15,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:58:15,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-04 14:58:15,748 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:58:15,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:58:15,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1603680642, now seen corresponding path program 3 times [2024-06-04 14:58:15,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:58:15,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796288955] [2024-06-04 14:58:15,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:58:15,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:58:15,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:58:16,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:58:16,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:58:16,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796288955] [2024-06-04 14:58:16,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796288955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:58:16,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:58:16,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:58:16,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640526243] [2024-06-04 14:58:16,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:58:16,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:58:16,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:58:16,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:58:16,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:58:17,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:58:17,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 333 transitions, 3961 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:17,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:58:17,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:58:17,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:58:18,425 INFO L124 PetriNetUnfolderBase]: 4003/5872 cut-off events. [2024-06-04 14:58:18,425 INFO L125 PetriNetUnfolderBase]: For 868131/868137 co-relation queries the response was YES. [2024-06-04 14:58:18,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60464 conditions, 5872 events. 4003/5872 cut-off events. For 868131/868137 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 29303 event pairs, 828 based on Foata normal form. 7/5876 useless extension candidates. Maximal degree in co-relation 60352. Up to 5210 conditions per place. [2024-06-04 14:58:18,486 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 283 selfloop transitions, 92 changer transitions 0/378 dead transitions. [2024-06-04 14:58:18,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 378 transitions, 5609 flow [2024-06-04 14:58:18,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:58:18,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:58:18,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-04 14:58:18,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44191919191919193 [2024-06-04 14:58:18,487 INFO L175 Difference]: Start difference. First operand has 241 places, 333 transitions, 3961 flow. Second operand 9 states and 175 transitions. [2024-06-04 14:58:18,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 378 transitions, 5609 flow [2024-06-04 14:58:19,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 378 transitions, 5321 flow, removed 65 selfloop flow, removed 7 redundant places. [2024-06-04 14:58:19,222 INFO L231 Difference]: Finished difference. Result has 243 places, 339 transitions, 4155 flow [2024-06-04 14:58:19,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3673, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4155, PETRI_PLACES=243, PETRI_TRANSITIONS=339} [2024-06-04 14:58:19,223 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 198 predicate places. [2024-06-04 14:58:19,223 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 339 transitions, 4155 flow [2024-06-04 14:58:19,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:19,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:58:19,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:58:19,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-04 14:58:19,223 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:58:19,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:58:19,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1036052576, now seen corresponding path program 4 times [2024-06-04 14:58:19,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:58:19,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763326849] [2024-06-04 14:58:19,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:58:19,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:58:19,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:58:20,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:58:20,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:58:20,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763326849] [2024-06-04 14:58:20,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763326849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:58:20,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:58:20,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:58:20,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271929576] [2024-06-04 14:58:20,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:58:20,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:58:20,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:58:20,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:58:20,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:58:20,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:58:20,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 339 transitions, 4155 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:20,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:58:20,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:58:20,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:58:21,742 INFO L124 PetriNetUnfolderBase]: 3993/5858 cut-off events. [2024-06-04 14:58:21,743 INFO L125 PetriNetUnfolderBase]: For 877266/877272 co-relation queries the response was YES. [2024-06-04 14:58:21,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60356 conditions, 5858 events. 3993/5858 cut-off events. For 877266/877272 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 29176 event pairs, 849 based on Foata normal form. 7/5862 useless extension candidates. Maximal degree in co-relation 60243. Up to 5316 conditions per place. [2024-06-04 14:58:21,802 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 298 selfloop transitions, 76 changer transitions 0/377 dead transitions. [2024-06-04 14:58:21,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 377 transitions, 5405 flow [2024-06-04 14:58:21,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:58:21,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:58:21,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-04 14:58:21,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-04 14:58:21,804 INFO L175 Difference]: Start difference. First operand has 243 places, 339 transitions, 4155 flow. Second operand 9 states and 174 transitions. [2024-06-04 14:58:21,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 377 transitions, 5405 flow [2024-06-04 14:58:22,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 377 transitions, 5049 flow, removed 128 selfloop flow, removed 5 redundant places. [2024-06-04 14:58:22,679 INFO L231 Difference]: Finished difference. Result has 247 places, 339 transitions, 3959 flow [2024-06-04 14:58:22,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3799, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3959, PETRI_PLACES=247, PETRI_TRANSITIONS=339} [2024-06-04 14:58:22,679 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 202 predicate places. [2024-06-04 14:58:22,679 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 339 transitions, 3959 flow [2024-06-04 14:58:22,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:22,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:58:22,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:58:22,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-04 14:58:22,680 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:58:22,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:58:22,680 INFO L85 PathProgramCache]: Analyzing trace with hash -2003565828, now seen corresponding path program 7 times [2024-06-04 14:58:22,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:58:22,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950080957] [2024-06-04 14:58:22,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:58:22,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:58:22,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:58:23,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:58:23,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:58:23,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950080957] [2024-06-04 14:58:23,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950080957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:58:23,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:58:23,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:58:23,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182034287] [2024-06-04 14:58:23,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:58:23,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:58:23,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:58:23,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:58:23,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:58:23,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:58:23,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 339 transitions, 3959 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:23,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:58:23,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:58:23,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:58:24,965 INFO L124 PetriNetUnfolderBase]: 4133/6057 cut-off events. [2024-06-04 14:58:24,965 INFO L125 PetriNetUnfolderBase]: For 930219/930225 co-relation queries the response was YES. [2024-06-04 14:58:25,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63222 conditions, 6057 events. 4133/6057 cut-off events. For 930219/930225 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 30331 event pairs, 857 based on Foata normal form. 7/6061 useless extension candidates. Maximal degree in co-relation 63107. Up to 4467 conditions per place. [2024-06-04 14:58:25,171 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 252 selfloop transitions, 147 changer transitions 0/402 dead transitions. [2024-06-04 14:58:25,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 402 transitions, 6548 flow [2024-06-04 14:58:25,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:58:25,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:58:25,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-04 14:58:25,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4636363636363636 [2024-06-04 14:58:25,172 INFO L175 Difference]: Start difference. First operand has 247 places, 339 transitions, 3959 flow. Second operand 10 states and 204 transitions. [2024-06-04 14:58:25,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 402 transitions, 6548 flow [2024-06-04 14:58:26,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 402 transitions, 6368 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-04 14:58:26,109 INFO L231 Difference]: Finished difference. Result has 251 places, 351 transitions, 4504 flow [2024-06-04 14:58:26,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3779, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4504, PETRI_PLACES=251, PETRI_TRANSITIONS=351} [2024-06-04 14:58:26,109 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 206 predicate places. [2024-06-04 14:58:26,109 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 351 transitions, 4504 flow [2024-06-04 14:58:26,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:26,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:58:26,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:58:26,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-04 14:58:26,110 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:58:26,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:58:26,110 INFO L85 PathProgramCache]: Analyzing trace with hash -2003364018, now seen corresponding path program 8 times [2024-06-04 14:58:26,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:58:26,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312387439] [2024-06-04 14:58:26,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:58:26,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:58:26,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:58:27,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:58:27,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:58:27,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312387439] [2024-06-04 14:58:27,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312387439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:58:27,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:58:27,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:58:27,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244314961] [2024-06-04 14:58:27,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:58:27,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:58:27,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:58:27,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:58:27,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:58:27,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:58:27,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 351 transitions, 4504 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:27,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:58:27,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:58:27,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:58:28,460 INFO L124 PetriNetUnfolderBase]: 4169/6109 cut-off events. [2024-06-04 14:58:28,460 INFO L125 PetriNetUnfolderBase]: For 970560/970566 co-relation queries the response was YES. [2024-06-04 14:58:28,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65142 conditions, 6109 events. 4169/6109 cut-off events. For 970560/970566 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 30557 event pairs, 862 based on Foata normal form. 7/6113 useless extension candidates. Maximal degree in co-relation 65024. Up to 4497 conditions per place. [2024-06-04 14:58:28,538 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 250 selfloop transitions, 152 changer transitions 0/405 dead transitions. [2024-06-04 14:58:28,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 405 transitions, 6764 flow [2024-06-04 14:58:28,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:58:28,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:58:28,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-04 14:58:28,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4636363636363636 [2024-06-04 14:58:28,547 INFO L175 Difference]: Start difference. First operand has 251 places, 351 transitions, 4504 flow. Second operand 10 states and 204 transitions. [2024-06-04 14:58:28,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 405 transitions, 6764 flow [2024-06-04 14:58:29,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 405 transitions, 6375 flow, removed 91 selfloop flow, removed 5 redundant places. [2024-06-04 14:58:29,561 INFO L231 Difference]: Finished difference. Result has 256 places, 355 transitions, 4592 flow [2024-06-04 14:58:29,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4124, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4592, PETRI_PLACES=256, PETRI_TRANSITIONS=355} [2024-06-04 14:58:29,562 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 211 predicate places. [2024-06-04 14:58:29,562 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 355 transitions, 4592 flow [2024-06-04 14:58:29,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:29,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:58:29,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:58:29,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-04 14:58:29,563 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:58:29,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:58:29,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1756679586, now seen corresponding path program 9 times [2024-06-04 14:58:29,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:58:29,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528364625] [2024-06-04 14:58:29,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:58:29,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:58:29,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:58:30,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:58:30,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:58:30,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528364625] [2024-06-04 14:58:30,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528364625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:58:30,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:58:30,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:58:30,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810145968] [2024-06-04 14:58:30,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:58:30,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:58:30,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:58:30,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:58:30,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:58:30,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:58:30,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 355 transitions, 4592 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:30,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:58:30,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:58:30,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:58:31,923 INFO L124 PetriNetUnfolderBase]: 4173/6115 cut-off events. [2024-06-04 14:58:31,923 INFO L125 PetriNetUnfolderBase]: For 982915/982921 co-relation queries the response was YES. [2024-06-04 14:58:31,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64926 conditions, 6115 events. 4173/6115 cut-off events. For 982915/982921 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 30656 event pairs, 860 based on Foata normal form. 7/6119 useless extension candidates. Maximal degree in co-relation 64807. Up to 4506 conditions per place. [2024-06-04 14:58:31,995 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 222 selfloop transitions, 181 changer transitions 0/406 dead transitions. [2024-06-04 14:58:31,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 406 transitions, 6495 flow [2024-06-04 14:58:31,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:58:31,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:58:31,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-04 14:58:31,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-04 14:58:31,996 INFO L175 Difference]: Start difference. First operand has 256 places, 355 transitions, 4592 flow. Second operand 10 states and 200 transitions. [2024-06-04 14:58:31,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 406 transitions, 6495 flow [2024-06-04 14:58:33,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 406 transitions, 6142 flow, removed 65 selfloop flow, removed 6 redundant places. [2024-06-04 14:58:33,122 INFO L231 Difference]: Finished difference. Result has 260 places, 359 transitions, 4773 flow [2024-06-04 14:58:33,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4242, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4773, PETRI_PLACES=260, PETRI_TRANSITIONS=359} [2024-06-04 14:58:33,123 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 215 predicate places. [2024-06-04 14:58:33,123 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 359 transitions, 4773 flow [2024-06-04 14:58:33,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:33,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:58:33,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:58:33,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-04 14:58:33,123 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:58:33,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:58:33,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1764036816, now seen corresponding path program 10 times [2024-06-04 14:58:33,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:58:33,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894506973] [2024-06-04 14:58:33,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:58:33,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:58:33,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:58:34,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:58:34,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:58:34,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894506973] [2024-06-04 14:58:34,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894506973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:58:34,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:58:34,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:58:34,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669431122] [2024-06-04 14:58:34,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:58:34,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:58:34,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:58:34,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:58:34,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:58:34,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:58:34,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 359 transitions, 4773 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:34,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:58:34,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:58:34,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:58:35,516 INFO L124 PetriNetUnfolderBase]: 4161/6099 cut-off events. [2024-06-04 14:58:35,516 INFO L125 PetriNetUnfolderBase]: For 992258/992264 co-relation queries the response was YES. [2024-06-04 14:58:35,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64712 conditions, 6099 events. 4161/6099 cut-off events. For 992258/992264 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 30534 event pairs, 850 based on Foata normal form. 7/6103 useless extension candidates. Maximal degree in co-relation 64592. Up to 4500 conditions per place. [2024-06-04 14:58:35,592 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 251 selfloop transitions, 153 changer transitions 0/407 dead transitions. [2024-06-04 14:58:35,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 407 transitions, 6687 flow [2024-06-04 14:58:35,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:58:35,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:58:35,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 201 transitions. [2024-06-04 14:58:35,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45681818181818185 [2024-06-04 14:58:35,593 INFO L175 Difference]: Start difference. First operand has 260 places, 359 transitions, 4773 flow. Second operand 10 states and 201 transitions. [2024-06-04 14:58:35,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 407 transitions, 6687 flow [2024-06-04 14:58:36,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 407 transitions, 6174 flow, removed 117 selfloop flow, removed 7 redundant places. [2024-06-04 14:58:36,782 INFO L231 Difference]: Finished difference. Result has 263 places, 359 transitions, 4576 flow [2024-06-04 14:58:36,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4260, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4576, PETRI_PLACES=263, PETRI_TRANSITIONS=359} [2024-06-04 14:58:36,782 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 218 predicate places. [2024-06-04 14:58:36,782 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 359 transitions, 4576 flow [2024-06-04 14:58:36,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:36,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:58:36,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:58:36,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-04 14:58:36,783 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:58:36,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:58:36,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1764036971, now seen corresponding path program 4 times [2024-06-04 14:58:36,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:58:36,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256376117] [2024-06-04 14:58:36,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:58:36,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:58:36,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:58:37,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:58:37,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:58:37,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256376117] [2024-06-04 14:58:37,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256376117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:58:37,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:58:37,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:58:37,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184451384] [2024-06-04 14:58:37,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:58:37,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:58:37,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:58:37,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:58:37,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:58:38,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:58:38,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 359 transitions, 4576 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:38,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:58:38,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:58:38,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:58:39,169 INFO L124 PetriNetUnfolderBase]: 3969/5912 cut-off events. [2024-06-04 14:58:39,169 INFO L125 PetriNetUnfolderBase]: For 1000755/1000764 co-relation queries the response was YES. [2024-06-04 14:58:39,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63191 conditions, 5912 events. 3969/5912 cut-off events. For 1000755/1000764 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 30400 event pairs, 903 based on Foata normal form. 9/5918 useless extension candidates. Maximal degree in co-relation 63070. Up to 5286 conditions per place. [2024-06-04 14:58:39,243 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 270 selfloop transitions, 55 changer transitions 0/396 dead transitions. [2024-06-04 14:58:39,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 396 transitions, 5468 flow [2024-06-04 14:58:39,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:58:39,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:58:39,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-04 14:58:39,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-06-04 14:58:39,244 INFO L175 Difference]: Start difference. First operand has 263 places, 359 transitions, 4576 flow. Second operand 10 states and 185 transitions. [2024-06-04 14:58:39,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 396 transitions, 5468 flow [2024-06-04 14:58:40,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 396 transitions, 5159 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-04 14:58:40,318 INFO L231 Difference]: Finished difference. Result has 265 places, 362 transitions, 4547 flow [2024-06-04 14:58:40,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4267, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4547, PETRI_PLACES=265, PETRI_TRANSITIONS=362} [2024-06-04 14:58:40,319 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 220 predicate places. [2024-06-04 14:58:40,319 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 362 transitions, 4547 flow [2024-06-04 14:58:40,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:40,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:58:40,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:58:40,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-04 14:58:40,319 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:58:40,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:58:40,319 INFO L85 PathProgramCache]: Analyzing trace with hash 193549579, now seen corresponding path program 2 times [2024-06-04 14:58:40,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:58:40,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932680691] [2024-06-04 14:58:40,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:58:40,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:58:40,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:58:41,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:58:41,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:58:41,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932680691] [2024-06-04 14:58:41,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932680691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:58:41,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:58:41,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:58:41,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615602740] [2024-06-04 14:58:41,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:58:41,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:58:41,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:58:41,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:58:41,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:58:41,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:58:41,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 362 transitions, 4547 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:41,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:58:41,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:58:41,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:58:42,418 INFO L124 PetriNetUnfolderBase]: 3968/5912 cut-off events. [2024-06-04 14:58:42,419 INFO L125 PetriNetUnfolderBase]: For 1035747/1035775 co-relation queries the response was YES. [2024-06-04 14:58:42,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63974 conditions, 5912 events. 3968/5912 cut-off events. For 1035747/1035775 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 30634 event pairs, 1521 based on Foata normal form. 5/5864 useless extension candidates. Maximal degree in co-relation 63852. Up to 5633 conditions per place. [2024-06-04 14:58:42,491 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 344 selfloop transitions, 28 changer transitions 0/396 dead transitions. [2024-06-04 14:58:42,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 396 transitions, 5768 flow [2024-06-04 14:58:42,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:58:42,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:58:42,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-04 14:58:42,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835227272727273 [2024-06-04 14:58:42,492 INFO L175 Difference]: Start difference. First operand has 265 places, 362 transitions, 4547 flow. Second operand 8 states and 135 transitions. [2024-06-04 14:58:42,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 396 transitions, 5768 flow [2024-06-04 14:58:43,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 396 transitions, 5502 flow, removed 75 selfloop flow, removed 8 redundant places. [2024-06-04 14:58:43,751 INFO L231 Difference]: Finished difference. Result has 268 places, 381 transitions, 4679 flow [2024-06-04 14:58:43,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4291, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4679, PETRI_PLACES=268, PETRI_TRANSITIONS=381} [2024-06-04 14:58:43,752 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 223 predicate places. [2024-06-04 14:58:43,752 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 381 transitions, 4679 flow [2024-06-04 14:58:43,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:43,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:58:43,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:58:43,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-04 14:58:43,752 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:58:43,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:58:43,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1257236427, now seen corresponding path program 1 times [2024-06-04 14:58:43,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:58:43,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97357090] [2024-06-04 14:58:43,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:58:43,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:58:43,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:58:44,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:58:44,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:58:44,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97357090] [2024-06-04 14:58:44,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97357090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:58:44,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:58:44,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:58:44,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265823623] [2024-06-04 14:58:44,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:58:44,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:58:44,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:58:44,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:58:44,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:58:44,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:58:44,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 381 transitions, 4679 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:44,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:58:44,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:58:44,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:58:45,925 INFO L124 PetriNetUnfolderBase]: 3766/5674 cut-off events. [2024-06-04 14:58:45,925 INFO L125 PetriNetUnfolderBase]: For 1066747/1066859 co-relation queries the response was YES. [2024-06-04 14:58:45,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62681 conditions, 5674 events. 3766/5674 cut-off events. For 1066747/1066859 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 30015 event pairs, 1275 based on Foata normal form. 41/5624 useless extension candidates. Maximal degree in co-relation 62555. Up to 5197 conditions per place. [2024-06-04 14:58:45,997 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 335 selfloop transitions, 35 changer transitions 0/419 dead transitions. [2024-06-04 14:58:45,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 419 transitions, 5820 flow [2024-06-04 14:58:45,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:58:45,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:58:45,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-04 14:58:45,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-04 14:58:45,998 INFO L175 Difference]: Start difference. First operand has 268 places, 381 transitions, 4679 flow. Second operand 8 states and 153 transitions. [2024-06-04 14:58:45,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 419 transitions, 5820 flow [2024-06-04 14:58:47,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 419 transitions, 5796 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-06-04 14:58:47,279 INFO L231 Difference]: Finished difference. Result has 279 places, 398 transitions, 4992 flow [2024-06-04 14:58:47,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4655, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4992, PETRI_PLACES=279, PETRI_TRANSITIONS=398} [2024-06-04 14:58:47,279 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 234 predicate places. [2024-06-04 14:58:47,279 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 398 transitions, 4992 flow [2024-06-04 14:58:47,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:47,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:58:47,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:58:47,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-04 14:58:47,279 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:58:47,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:58:47,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1940822325, now seen corresponding path program 3 times [2024-06-04 14:58:47,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:58:47,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043391947] [2024-06-04 14:58:47,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:58:47,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:58:47,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:58:47,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:58:47,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:58:47,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043391947] [2024-06-04 14:58:47,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043391947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:58:47,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:58:47,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:58:47,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721468596] [2024-06-04 14:58:47,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:58:47,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:58:47,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:58:47,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:58:47,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:58:48,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:58:48,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 398 transitions, 4992 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:48,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:58:48,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:58:48,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:58:49,302 INFO L124 PetriNetUnfolderBase]: 4009/5970 cut-off events. [2024-06-04 14:58:49,302 INFO L125 PetriNetUnfolderBase]: For 1076893/1076921 co-relation queries the response was YES. [2024-06-04 14:58:49,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65800 conditions, 5970 events. 4009/5970 cut-off events. For 1076893/1076921 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 30906 event pairs, 1232 based on Foata normal form. 5/5929 useless extension candidates. Maximal degree in co-relation 65667. Up to 5642 conditions per place. [2024-06-04 14:58:49,379 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 348 selfloop transitions, 57 changer transitions 0/429 dead transitions. [2024-06-04 14:58:49,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 429 transitions, 6178 flow [2024-06-04 14:58:49,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:58:49,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:58:49,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-04 14:58:49,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119318181818182 [2024-06-04 14:58:49,379 INFO L175 Difference]: Start difference. First operand has 279 places, 398 transitions, 4992 flow. Second operand 8 states and 145 transitions. [2024-06-04 14:58:49,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 429 transitions, 6178 flow [2024-06-04 14:58:50,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 429 transitions, 6115 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-04 14:58:50,798 INFO L231 Difference]: Finished difference. Result has 287 places, 410 transitions, 5269 flow [2024-06-04 14:58:50,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4929, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5269, PETRI_PLACES=287, PETRI_TRANSITIONS=410} [2024-06-04 14:58:50,798 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 242 predicate places. [2024-06-04 14:58:50,798 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 410 transitions, 5269 flow [2024-06-04 14:58:50,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:50,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:58:50,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:58:50,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-04 14:58:50,798 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:58:50,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:58:50,799 INFO L85 PathProgramCache]: Analyzing trace with hash 193550013, now seen corresponding path program 2 times [2024-06-04 14:58:50,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:58:50,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528611346] [2024-06-04 14:58:50,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:58:50,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:58:50,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:58:51,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:58:51,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:58:51,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528611346] [2024-06-04 14:58:51,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528611346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:58:51,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:58:51,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:58:51,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243361729] [2024-06-04 14:58:51,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:58:51,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:58:51,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:58:51,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:58:51,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:58:51,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:58:51,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 410 transitions, 5269 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:51,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:58:51,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:58:51,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:58:52,849 INFO L124 PetriNetUnfolderBase]: 3805/5727 cut-off events. [2024-06-04 14:58:52,849 INFO L125 PetriNetUnfolderBase]: For 1125297/1125384 co-relation queries the response was YES. [2024-06-04 14:58:52,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64703 conditions, 5727 events. 3805/5727 cut-off events. For 1125297/1125384 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 30299 event pairs, 1428 based on Foata normal form. 28/5651 useless extension candidates. Maximal degree in co-relation 64566. Up to 5258 conditions per place. [2024-06-04 14:58:52,929 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 349 selfloop transitions, 38 changer transitions 0/440 dead transitions. [2024-06-04 14:58:52,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 440 transitions, 6439 flow [2024-06-04 14:58:52,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:58:52,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:58:52,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-04 14:58:52,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4147727272727273 [2024-06-04 14:58:52,930 INFO L175 Difference]: Start difference. First operand has 287 places, 410 transitions, 5269 flow. Second operand 8 states and 146 transitions. [2024-06-04 14:58:52,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 440 transitions, 6439 flow [2024-06-04 14:58:54,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 440 transitions, 6353 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-04 14:58:54,246 INFO L231 Difference]: Finished difference. Result has 292 places, 423 transitions, 5494 flow [2024-06-04 14:58:54,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5183, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5494, PETRI_PLACES=292, PETRI_TRANSITIONS=423} [2024-06-04 14:58:54,247 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 247 predicate places. [2024-06-04 14:58:54,247 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 423 transitions, 5494 flow [2024-06-04 14:58:54,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:54,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:58:54,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:58:54,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-04 14:58:54,247 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:58:54,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:58:54,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1007441716, now seen corresponding path program 5 times [2024-06-04 14:58:54,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:58:54,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346155110] [2024-06-04 14:58:54,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:58:54,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:58:54,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:58:55,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:58:55,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:58:55,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346155110] [2024-06-04 14:58:55,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346155110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:58:55,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:58:55,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:58:55,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508661009] [2024-06-04 14:58:55,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:58:55,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:58:55,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:58:55,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:58:55,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:58:55,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:58:55,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 423 transitions, 5494 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:55,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:58:55,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:58:55,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:58:57,046 INFO L124 PetriNetUnfolderBase]: 4334/6366 cut-off events. [2024-06-04 14:58:57,046 INFO L125 PetriNetUnfolderBase]: For 1157052/1157052 co-relation queries the response was YES. [2024-06-04 14:58:57,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69569 conditions, 6366 events. 4334/6366 cut-off events. For 1157052/1157052 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 32203 event pairs, 1618 based on Foata normal form. 6/6370 useless extension candidates. Maximal degree in co-relation 69431. Up to 6058 conditions per place. [2024-06-04 14:58:57,146 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 407 selfloop transitions, 47 changer transitions 0/457 dead transitions. [2024-06-04 14:58:57,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 457 transitions, 6820 flow [2024-06-04 14:58:57,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:58:57,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:58:57,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-04 14:58:57,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41414141414141414 [2024-06-04 14:58:57,147 INFO L175 Difference]: Start difference. First operand has 292 places, 423 transitions, 5494 flow. Second operand 9 states and 164 transitions. [2024-06-04 14:58:57,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 457 transitions, 6820 flow [2024-06-04 14:58:58,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 457 transitions, 6716 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-04 14:58:58,463 INFO L231 Difference]: Finished difference. Result has 297 places, 426 transitions, 5656 flow [2024-06-04 14:58:58,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5390, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5656, PETRI_PLACES=297, PETRI_TRANSITIONS=426} [2024-06-04 14:58:58,464 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 252 predicate places. [2024-06-04 14:58:58,464 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 426 transitions, 5656 flow [2024-06-04 14:58:58,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:58,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:58:58,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:58:58,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-04 14:58:58,464 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:58:58,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:58:58,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1007432416, now seen corresponding path program 6 times [2024-06-04 14:58:58,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:58:58,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606541945] [2024-06-04 14:58:58,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:58:58,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:58:58,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:58:59,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:58:59,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:58:59,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606541945] [2024-06-04 14:58:59,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606541945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:58:59,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:58:59,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:58:59,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327130139] [2024-06-04 14:58:59,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:58:59,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:58:59,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:58:59,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:58:59,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:58:59,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:58:59,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 426 transitions, 5656 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:58:59,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:58:59,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:58:59,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:59:01,292 INFO L124 PetriNetUnfolderBase]: 4400/6468 cut-off events. [2024-06-04 14:59:01,292 INFO L125 PetriNetUnfolderBase]: For 1215899/1215899 co-relation queries the response was YES. [2024-06-04 14:59:01,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72080 conditions, 6468 events. 4400/6468 cut-off events. For 1215899/1215899 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 32877 event pairs, 1623 based on Foata normal form. 6/6472 useless extension candidates. Maximal degree in co-relation 71941. Up to 6066 conditions per place. [2024-06-04 14:59:01,386 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 407 selfloop transitions, 55 changer transitions 0/465 dead transitions. [2024-06-04 14:59:01,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 465 transitions, 7462 flow [2024-06-04 14:59:01,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:59:01,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:59:01,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-04 14:59:01,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41919191919191917 [2024-06-04 14:59:01,387 INFO L175 Difference]: Start difference. First operand has 297 places, 426 transitions, 5656 flow. Second operand 9 states and 166 transitions. [2024-06-04 14:59:01,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 465 transitions, 7462 flow [2024-06-04 14:59:02,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 465 transitions, 7220 flow, removed 76 selfloop flow, removed 7 redundant places. [2024-06-04 14:59:02,831 INFO L231 Difference]: Finished difference. Result has 299 places, 432 transitions, 5866 flow [2024-06-04 14:59:02,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5414, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5866, PETRI_PLACES=299, PETRI_TRANSITIONS=432} [2024-06-04 14:59:02,832 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 254 predicate places. [2024-06-04 14:59:02,832 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 432 transitions, 5866 flow [2024-06-04 14:59:02,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:02,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:59:02,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:59:02,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-04 14:59:02,832 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:59:02,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:59:02,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1007709122, now seen corresponding path program 11 times [2024-06-04 14:59:02,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:59:02,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926239273] [2024-06-04 14:59:02,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:59:02,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:59:02,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:59:03,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:59:03,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:59:03,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926239273] [2024-06-04 14:59:03,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926239273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:59:03,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:59:03,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:59:03,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399763772] [2024-06-04 14:59:03,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:59:03,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:59:03,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:59:03,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:59:03,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:59:03,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:59:03,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 432 transitions, 5866 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:03,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:59:03,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:59:03,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:59:05,427 INFO L124 PetriNetUnfolderBase]: 4484/6588 cut-off events. [2024-06-04 14:59:05,427 INFO L125 PetriNetUnfolderBase]: For 1273024/1273024 co-relation queries the response was YES. [2024-06-04 14:59:05,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74097 conditions, 6588 events. 4484/6588 cut-off events. For 1273024/1273024 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 33549 event pairs, 1638 based on Foata normal form. 6/6592 useless extension candidates. Maximal degree in co-relation 73957. Up to 5958 conditions per place. [2024-06-04 14:59:05,516 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 408 selfloop transitions, 70 changer transitions 0/481 dead transitions. [2024-06-04 14:59:05,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 481 transitions, 8034 flow [2024-06-04 14:59:05,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:59:05,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:59:05,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-04 14:59:05,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42954545454545456 [2024-06-04 14:59:05,517 INFO L175 Difference]: Start difference. First operand has 299 places, 432 transitions, 5866 flow. Second operand 10 states and 189 transitions. [2024-06-04 14:59:05,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 481 transitions, 8034 flow [2024-06-04 14:59:07,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 481 transitions, 7781 flow, removed 98 selfloop flow, removed 5 redundant places. [2024-06-04 14:59:07,139 INFO L231 Difference]: Finished difference. Result has 306 places, 441 transitions, 6207 flow [2024-06-04 14:59:07,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5613, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6207, PETRI_PLACES=306, PETRI_TRANSITIONS=441} [2024-06-04 14:59:07,139 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 261 predicate places. [2024-06-04 14:59:07,139 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 441 transitions, 6207 flow [2024-06-04 14:59:07,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:07,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:59:07,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:59:07,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-04 14:59:07,140 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:59:07,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:59:07,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1020102578, now seen corresponding path program 7 times [2024-06-04 14:59:07,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:59:07,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777386694] [2024-06-04 14:59:07,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:59:07,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:59:07,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:59:08,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:59:08,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:59:08,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777386694] [2024-06-04 14:59:08,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777386694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:59:08,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:59:08,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:59:08,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904822757] [2024-06-04 14:59:08,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:59:08,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:59:08,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:59:08,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:59:08,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:59:08,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:59:08,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 441 transitions, 6207 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:08,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:59:08,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:59:08,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:59:09,925 INFO L124 PetriNetUnfolderBase]: 4474/6574 cut-off events. [2024-06-04 14:59:09,925 INFO L125 PetriNetUnfolderBase]: For 1284411/1284411 co-relation queries the response was YES. [2024-06-04 14:59:09,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74270 conditions, 6574 events. 4474/6574 cut-off events. For 1284411/1284411 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 33475 event pairs, 1632 based on Foata normal form. 6/6578 useless extension candidates. Maximal degree in co-relation 74126. Up to 6266 conditions per place. [2024-06-04 14:59:10,023 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 424 selfloop transitions, 46 changer transitions 0/473 dead transitions. [2024-06-04 14:59:10,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 473 transitions, 7575 flow [2024-06-04 14:59:10,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:59:10,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:59:10,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-04 14:59:10,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41414141414141414 [2024-06-04 14:59:10,024 INFO L175 Difference]: Start difference. First operand has 306 places, 441 transitions, 6207 flow. Second operand 9 states and 164 transitions. [2024-06-04 14:59:10,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 473 transitions, 7575 flow [2024-06-04 14:59:11,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 473 transitions, 7000 flow, removed 151 selfloop flow, removed 9 redundant places. [2024-06-04 14:59:11,913 INFO L231 Difference]: Finished difference. Result has 306 places, 441 transitions, 5732 flow [2024-06-04 14:59:11,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5632, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5732, PETRI_PLACES=306, PETRI_TRANSITIONS=441} [2024-06-04 14:59:11,913 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 261 predicate places. [2024-06-04 14:59:11,913 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 441 transitions, 5732 flow [2024-06-04 14:59:11,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:11,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:59:11,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:59:11,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-04 14:59:11,914 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:59:11,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:59:11,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1020312324, now seen corresponding path program 12 times [2024-06-04 14:59:11,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:59:11,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469183247] [2024-06-04 14:59:11,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:59:11,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:59:11,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:59:12,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:59:12,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:59:12,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469183247] [2024-06-04 14:59:12,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469183247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:59:12,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:59:12,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:59:12,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13397558] [2024-06-04 14:59:12,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:59:12,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:59:12,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:59:12,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:59:12,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:59:12,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:59:12,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 441 transitions, 5732 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:12,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:59:12,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:59:12,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:59:14,549 INFO L124 PetriNetUnfolderBase]: 4558/6694 cut-off events. [2024-06-04 14:59:14,549 INFO L125 PetriNetUnfolderBase]: For 1320344/1320344 co-relation queries the response was YES. [2024-06-04 14:59:14,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75017 conditions, 6694 events. 4558/6694 cut-off events. For 1320344/1320344 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 34151 event pairs, 1607 based on Foata normal form. 6/6698 useless extension candidates. Maximal degree in co-relation 74873. Up to 6010 conditions per place. [2024-06-04 14:59:14,633 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 414 selfloop transitions, 74 changer transitions 0/491 dead transitions. [2024-06-04 14:59:14,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 491 transitions, 8188 flow [2024-06-04 14:59:14,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:59:14,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:59:14,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-04 14:59:14,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42954545454545456 [2024-06-04 14:59:14,634 INFO L175 Difference]: Start difference. First operand has 306 places, 441 transitions, 5732 flow. Second operand 10 states and 189 transitions. [2024-06-04 14:59:14,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 491 transitions, 8188 flow [2024-06-04 14:59:16,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 491 transitions, 8078 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-04 14:59:16,026 INFO L231 Difference]: Finished difference. Result has 308 places, 449 transitions, 6079 flow [2024-06-04 14:59:16,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5622, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6079, PETRI_PLACES=308, PETRI_TRANSITIONS=449} [2024-06-04 14:59:16,026 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 263 predicate places. [2024-06-04 14:59:16,026 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 449 transitions, 6079 flow [2024-06-04 14:59:16,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:16,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:59:16,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:59:16,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-04 14:59:16,027 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:59:16,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:59:16,027 INFO L85 PathProgramCache]: Analyzing trace with hash -2030330478, now seen corresponding path program 13 times [2024-06-04 14:59:16,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:59:16,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289057812] [2024-06-04 14:59:16,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:59:16,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:59:16,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:59:16,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:59:16,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:59:16,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289057812] [2024-06-04 14:59:16,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289057812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:59:16,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:59:16,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:59:16,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547621632] [2024-06-04 14:59:16,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:59:16,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:59:16,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:59:16,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:59:16,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:59:17,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:59:17,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 449 transitions, 6079 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:17,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:59:17,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:59:17,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:59:18,697 INFO L124 PetriNetUnfolderBase]: 4546/6678 cut-off events. [2024-06-04 14:59:18,697 INFO L125 PetriNetUnfolderBase]: For 1338322/1338322 co-relation queries the response was YES. [2024-06-04 14:59:18,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74998 conditions, 6678 events. 4546/6678 cut-off events. For 1338322/1338322 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 34021 event pairs, 1602 based on Foata normal form. 6/6682 useless extension candidates. Maximal degree in co-relation 74853. Up to 6004 conditions per place. [2024-06-04 14:59:18,779 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 412 selfloop transitions, 75 changer transitions 0/490 dead transitions. [2024-06-04 14:59:18,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 490 transitions, 8103 flow [2024-06-04 14:59:18,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:59:18,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:59:18,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-04 14:59:18,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-04 14:59:18,780 INFO L175 Difference]: Start difference. First operand has 308 places, 449 transitions, 6079 flow. Second operand 10 states and 187 transitions. [2024-06-04 14:59:18,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 490 transitions, 8103 flow [2024-06-04 14:59:20,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 490 transitions, 7558 flow, removed 120 selfloop flow, removed 8 redundant places. [2024-06-04 14:59:20,511 INFO L231 Difference]: Finished difference. Result has 310 places, 449 transitions, 5694 flow [2024-06-04 14:59:20,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5534, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5694, PETRI_PLACES=310, PETRI_TRANSITIONS=449} [2024-06-04 14:59:20,511 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 265 predicate places. [2024-06-04 14:59:20,511 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 449 transitions, 5694 flow [2024-06-04 14:59:20,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:20,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:59:20,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:59:20,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-04 14:59:20,512 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:59:20,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:59:20,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1015066507, now seen corresponding path program 5 times [2024-06-04 14:59:20,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:59:20,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472589] [2024-06-04 14:59:20,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:59:20,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:59:20,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:59:21,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:59:21,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:59:21,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472589] [2024-06-04 14:59:21,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:59:21,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:59:21,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:59:21,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617798313] [2024-06-04 14:59:21,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:59:21,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:59:21,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:59:21,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:59:21,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:59:21,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:59:21,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 449 transitions, 5694 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:21,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:59:21,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:59:21,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:59:23,513 INFO L124 PetriNetUnfolderBase]: 4361/6488 cut-off events. [2024-06-04 14:59:23,514 INFO L125 PetriNetUnfolderBase]: For 1360047/1360079 co-relation queries the response was YES. [2024-06-04 14:59:23,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73811 conditions, 6488 events. 4361/6488 cut-off events. For 1360047/1360079 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 33865 event pairs, 1582 based on Foata normal form. 5/6456 useless extension candidates. Maximal degree in co-relation 73665. Up to 5966 conditions per place. [2024-06-04 14:59:23,596 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 373 selfloop transitions, 24 changer transitions 0/482 dead transitions. [2024-06-04 14:59:23,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 482 transitions, 6762 flow [2024-06-04 14:59:23,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:59:23,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:59:23,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-04 14:59:23,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39545454545454545 [2024-06-04 14:59:23,598 INFO L175 Difference]: Start difference. First operand has 310 places, 449 transitions, 5694 flow. Second operand 10 states and 174 transitions. [2024-06-04 14:59:23,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 482 transitions, 6762 flow [2024-06-04 14:59:25,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 482 transitions, 6581 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-04 14:59:25,267 INFO L231 Difference]: Finished difference. Result has 311 places, 452 transitions, 5745 flow [2024-06-04 14:59:25,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5513, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5745, PETRI_PLACES=311, PETRI_TRANSITIONS=452} [2024-06-04 14:59:25,268 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 266 predicate places. [2024-06-04 14:59:25,268 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 452 transitions, 5745 flow [2024-06-04 14:59:25,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:25,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:59:25,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:59:25,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-04 14:59:25,269 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:59:25,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:59:25,269 INFO L85 PathProgramCache]: Analyzing trace with hash -317979407, now seen corresponding path program 1 times [2024-06-04 14:59:25,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:59:25,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732227093] [2024-06-04 14:59:25,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:59:25,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:59:25,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:59:26,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:59:26,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:59:26,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732227093] [2024-06-04 14:59:26,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732227093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:59:26,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:59:26,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:59:26,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596513922] [2024-06-04 14:59:26,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:59:26,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:59:26,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:59:26,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:59:26,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:59:26,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:59:26,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 452 transitions, 5745 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:26,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:59:26,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:59:26,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:59:28,013 INFO L124 PetriNetUnfolderBase]: 4283/6383 cut-off events. [2024-06-04 14:59:28,013 INFO L125 PetriNetUnfolderBase]: For 1376943/1376979 co-relation queries the response was YES. [2024-06-04 14:59:28,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73604 conditions, 6383 events. 4283/6383 cut-off events. For 1376943/1376979 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 33441 event pairs, 1250 based on Foata normal form. 7/6331 useless extension candidates. Maximal degree in co-relation 73458. Up to 5972 conditions per place. [2024-06-04 14:59:28,093 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 392 selfloop transitions, 70 changer transitions 0/486 dead transitions. [2024-06-04 14:59:28,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 486 transitions, 7249 flow [2024-06-04 14:59:28,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:59:28,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:59:28,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-04 14:59:28,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41919191919191917 [2024-06-04 14:59:28,095 INFO L175 Difference]: Start difference. First operand has 311 places, 452 transitions, 5745 flow. Second operand 9 states and 166 transitions. [2024-06-04 14:59:28,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 486 transitions, 7249 flow [2024-06-04 14:59:29,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 486 transitions, 7041 flow, removed 82 selfloop flow, removed 8 redundant places. [2024-06-04 14:59:29,537 INFO L231 Difference]: Finished difference. Result has 313 places, 461 transitions, 5884 flow [2024-06-04 14:59:29,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5537, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5884, PETRI_PLACES=313, PETRI_TRANSITIONS=461} [2024-06-04 14:59:29,537 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 268 predicate places. [2024-06-04 14:59:29,537 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 461 transitions, 5884 flow [2024-06-04 14:59:29,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:29,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:59:29,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:59:29,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-04 14:59:29,538 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:59:29,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:59:29,538 INFO L85 PathProgramCache]: Analyzing trace with hash -434529918, now seen corresponding path program 8 times [2024-06-04 14:59:29,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:59:29,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810365407] [2024-06-04 14:59:29,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:59:29,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:59:29,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:59:30,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:59:30,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:59:30,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810365407] [2024-06-04 14:59:30,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810365407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:59:30,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:59:30,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:59:30,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214761523] [2024-06-04 14:59:30,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:59:30,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:59:30,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:59:30,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:59:30,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:59:30,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:59:30,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 461 transitions, 5884 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:30,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:59:30,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:59:30,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:59:32,377 INFO L124 PetriNetUnfolderBase]: 4605/6764 cut-off events. [2024-06-04 14:59:32,378 INFO L125 PetriNetUnfolderBase]: For 1429470/1429470 co-relation queries the response was YES. [2024-06-04 14:59:32,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76645 conditions, 6764 events. 4605/6764 cut-off events. For 1429470/1429470 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 34510 event pairs, 1673 based on Foata normal form. 6/6768 useless extension candidates. Maximal degree in co-relation 76497. Up to 6595 conditions per place. [2024-06-04 14:59:32,462 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 455 selfloop transitions, 35 changer transitions 0/493 dead transitions. [2024-06-04 14:59:32,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 493 transitions, 7138 flow [2024-06-04 14:59:32,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:59:32,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:59:32,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-04 14:59:32,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4015151515151515 [2024-06-04 14:59:32,463 INFO L175 Difference]: Start difference. First operand has 313 places, 461 transitions, 5884 flow. Second operand 9 states and 159 transitions. [2024-06-04 14:59:32,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 493 transitions, 7138 flow [2024-06-04 14:59:34,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 493 transitions, 7019 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-04 14:59:34,089 INFO L231 Difference]: Finished difference. Result has 318 places, 464 transitions, 6027 flow [2024-06-04 14:59:34,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5765, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6027, PETRI_PLACES=318, PETRI_TRANSITIONS=464} [2024-06-04 14:59:34,090 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 273 predicate places. [2024-06-04 14:59:34,090 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 464 transitions, 6027 flow [2024-06-04 14:59:34,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:34,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:59:34,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:59:34,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-04 14:59:34,090 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:59:34,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:59:34,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1295182288, now seen corresponding path program 14 times [2024-06-04 14:59:34,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:59:34,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368425391] [2024-06-04 14:59:34,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:59:34,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:59:34,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:59:35,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:59:35,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:59:35,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368425391] [2024-06-04 14:59:35,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368425391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:59:35,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:59:35,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:59:35,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282476364] [2024-06-04 14:59:35,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:59:35,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:59:35,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:59:35,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:59:35,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:59:35,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:59:35,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 464 transitions, 6027 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:35,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:59:35,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:59:35,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:59:36,786 INFO L124 PetriNetUnfolderBase]: 4593/6748 cut-off events. [2024-06-04 14:59:36,786 INFO L125 PetriNetUnfolderBase]: For 1433697/1433697 co-relation queries the response was YES. [2024-06-04 14:59:36,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76580 conditions, 6748 events. 4593/6748 cut-off events. For 1433697/1433697 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 34464 event pairs, 1633 based on Foata normal form. 6/6752 useless extension candidates. Maximal degree in co-relation 76430. Up to 6084 conditions per place. [2024-06-04 14:59:36,887 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 425 selfloop transitions, 75 changer transitions 0/503 dead transitions. [2024-06-04 14:59:36,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 503 transitions, 7771 flow [2024-06-04 14:59:36,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:59:36,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:59:36,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-04 14:59:36,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-04 14:59:36,889 INFO L175 Difference]: Start difference. First operand has 318 places, 464 transitions, 6027 flow. Second operand 10 states and 187 transitions. [2024-06-04 14:59:36,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 503 transitions, 7771 flow [2024-06-04 14:59:38,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 503 transitions, 7425 flow, removed 140 selfloop flow, removed 7 redundant places. [2024-06-04 14:59:38,975 INFO L231 Difference]: Finished difference. Result has 321 places, 464 transitions, 5840 flow [2024-06-04 14:59:38,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5681, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5840, PETRI_PLACES=321, PETRI_TRANSITIONS=464} [2024-06-04 14:59:38,976 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 276 predicate places. [2024-06-04 14:59:38,976 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 464 transitions, 5840 flow [2024-06-04 14:59:38,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:38,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:59:38,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:59:38,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-04 14:59:38,976 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:59:38,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:59:38,977 INFO L85 PathProgramCache]: Analyzing trace with hash -445571808, now seen corresponding path program 9 times [2024-06-04 14:59:38,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:59:38,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474889091] [2024-06-04 14:59:38,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:59:38,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:59:38,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:59:40,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:59:40,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:59:40,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474889091] [2024-06-04 14:59:40,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474889091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:59:40,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:59:40,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:59:40,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661002651] [2024-06-04 14:59:40,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:59:40,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:59:40,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:59:40,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:59:40,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:59:40,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:59:40,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 464 transitions, 5840 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:40,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:59:40,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:59:40,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:59:41,922 INFO L124 PetriNetUnfolderBase]: 4631/6806 cut-off events. [2024-06-04 14:59:41,922 INFO L125 PetriNetUnfolderBase]: For 1475671/1475671 co-relation queries the response was YES. [2024-06-04 14:59:41,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77580 conditions, 6806 events. 4631/6806 cut-off events. For 1475671/1475671 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 34855 event pairs, 1690 based on Foata normal form. 6/6810 useless extension candidates. Maximal degree in co-relation 77429. Up to 6511 conditions per place. [2024-06-04 14:59:42,009 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 446 selfloop transitions, 52 changer transitions 0/501 dead transitions. [2024-06-04 14:59:42,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 501 transitions, 7630 flow [2024-06-04 14:59:42,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:59:42,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:59:42,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-04 14:59:42,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41414141414141414 [2024-06-04 14:59:42,010 INFO L175 Difference]: Start difference. First operand has 321 places, 464 transitions, 5840 flow. Second operand 9 states and 164 transitions. [2024-06-04 14:59:42,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 501 transitions, 7630 flow [2024-06-04 14:59:43,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 501 transitions, 7475 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-04 14:59:43,964 INFO L231 Difference]: Finished difference. Result has 322 places, 470 transitions, 6172 flow [2024-06-04 14:59:43,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5685, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6172, PETRI_PLACES=322, PETRI_TRANSITIONS=470} [2024-06-04 14:59:43,965 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 277 predicate places. [2024-06-04 14:59:43,965 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 470 transitions, 6172 flow [2024-06-04 14:59:43,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:43,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:59:43,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:59:43,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-04 14:59:43,966 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:59:43,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:59:43,966 INFO L85 PathProgramCache]: Analyzing trace with hash -450832939, now seen corresponding path program 1 times [2024-06-04 14:59:43,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:59:43,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49380583] [2024-06-04 14:59:43,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:59:43,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:59:43,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:59:44,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:59:44,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:59:44,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49380583] [2024-06-04 14:59:44,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49380583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:59:44,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:59:44,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:59:44,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836528090] [2024-06-04 14:59:44,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:59:44,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:59:44,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:59:44,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:59:44,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:59:45,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:59:45,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 470 transitions, 6172 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:45,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:59:45,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:59:45,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:59:46,875 INFO L124 PetriNetUnfolderBase]: 4631/6806 cut-off events. [2024-06-04 14:59:46,875 INFO L125 PetriNetUnfolderBase]: For 1503393/1503393 co-relation queries the response was YES. [2024-06-04 14:59:46,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77824 conditions, 6806 events. 4631/6806 cut-off events. For 1503393/1503393 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 34828 event pairs, 1670 based on Foata normal form. 3/6807 useless extension candidates. Maximal degree in co-relation 77672. Up to 6601 conditions per place. [2024-06-04 14:59:46,975 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 450 selfloop transitions, 50 changer transitions 0/503 dead transitions. [2024-06-04 14:59:46,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 503 transitions, 7460 flow [2024-06-04 14:59:46,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:59:46,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:59:46,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-04 14:59:46,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-04 14:59:46,977 INFO L175 Difference]: Start difference. First operand has 322 places, 470 transitions, 6172 flow. Second operand 9 states and 162 transitions. [2024-06-04 14:59:46,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 503 transitions, 7460 flow [2024-06-04 14:59:49,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 503 transitions, 7184 flow, removed 113 selfloop flow, removed 5 redundant places. [2024-06-04 14:59:49,187 INFO L231 Difference]: Finished difference. Result has 326 places, 474 transitions, 6204 flow [2024-06-04 14:59:49,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5896, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6204, PETRI_PLACES=326, PETRI_TRANSITIONS=474} [2024-06-04 14:59:49,188 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 281 predicate places. [2024-06-04 14:59:49,188 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 474 transitions, 6204 flow [2024-06-04 14:59:49,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:49,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:59:49,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:59:49,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-04 14:59:49,188 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:59:49,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:59:49,189 INFO L85 PathProgramCache]: Analyzing trace with hash -450832660, now seen corresponding path program 10 times [2024-06-04 14:59:49,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:59:49,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420675533] [2024-06-04 14:59:49,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:59:49,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:59:49,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:59:50,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:59:50,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:59:50,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420675533] [2024-06-04 14:59:50,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420675533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:59:50,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:59:50,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:59:50,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687375009] [2024-06-04 14:59:50,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:59:50,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:59:50,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:59:50,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:59:50,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:59:50,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:59:50,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 474 transitions, 6204 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:50,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:59:50,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:59:50,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:59:51,934 INFO L124 PetriNetUnfolderBase]: 4618/6787 cut-off events. [2024-06-04 14:59:51,934 INFO L125 PetriNetUnfolderBase]: For 1504420/1504420 co-relation queries the response was YES. [2024-06-04 14:59:52,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77476 conditions, 6787 events. 4618/6787 cut-off events. For 1504420/1504420 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 34717 event pairs, 1670 based on Foata normal form. 6/6791 useless extension candidates. Maximal degree in co-relation 77322. Up to 6594 conditions per place. [2024-06-04 14:59:52,040 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 455 selfloop transitions, 45 changer transitions 0/503 dead transitions. [2024-06-04 14:59:52,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 503 transitions, 7304 flow [2024-06-04 14:59:52,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:59:52,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:59:52,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-04 14:59:52,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065656565656566 [2024-06-04 14:59:52,041 INFO L175 Difference]: Start difference. First operand has 326 places, 474 transitions, 6204 flow. Second operand 9 states and 161 transitions. [2024-06-04 14:59:52,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 503 transitions, 7304 flow [2024-06-04 14:59:54,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 503 transitions, 6924 flow, removed 145 selfloop flow, removed 7 redundant places. [2024-06-04 14:59:54,370 INFO L231 Difference]: Finished difference. Result has 328 places, 474 transitions, 5923 flow [2024-06-04 14:59:54,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5824, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5923, PETRI_PLACES=328, PETRI_TRANSITIONS=474} [2024-06-04 14:59:54,370 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 283 predicate places. [2024-06-04 14:59:54,371 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 474 transitions, 5923 flow [2024-06-04 14:59:54,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:54,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:59:54,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:59:54,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-04 14:59:54,371 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:59:54,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:59:54,371 INFO L85 PathProgramCache]: Analyzing trace with hash -764799296, now seen corresponding path program 15 times [2024-06-04 14:59:54,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:59:54,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795281880] [2024-06-04 14:59:54,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:59:54,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:59:54,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:59:55,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:59:55,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:59:55,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795281880] [2024-06-04 14:59:55,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795281880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:59:55,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:59:55,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:59:55,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919847431] [2024-06-04 14:59:55,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:59:55,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:59:55,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:59:55,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:59:55,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:59:55,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 14:59:55,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 474 transitions, 5923 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:55,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:59:55,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 14:59:55,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:59:56,957 INFO L124 PetriNetUnfolderBase]: 4618/6787 cut-off events. [2024-06-04 14:59:56,957 INFO L125 PetriNetUnfolderBase]: For 1521694/1521694 co-relation queries the response was YES. [2024-06-04 14:59:57,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76926 conditions, 6787 events. 4618/6787 cut-off events. For 1521694/1521694 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 34660 event pairs, 1665 based on Foata normal form. 6/6791 useless extension candidates. Maximal degree in co-relation 76771. Up to 6604 conditions per place. [2024-06-04 14:59:57,054 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 472 selfloop transitions, 37 changer transitions 0/512 dead transitions. [2024-06-04 14:59:57,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 512 transitions, 7235 flow [2024-06-04 14:59:57,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:59:57,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:59:57,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-04 14:59:57,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4022727272727273 [2024-06-04 14:59:57,056 INFO L175 Difference]: Start difference. First operand has 328 places, 474 transitions, 5923 flow. Second operand 10 states and 177 transitions. [2024-06-04 14:59:57,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 512 transitions, 7235 flow [2024-06-04 14:59:59,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 512 transitions, 7133 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-04 14:59:59,406 INFO L231 Difference]: Finished difference. Result has 330 places, 478 transitions, 6086 flow [2024-06-04 14:59:59,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5821, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6086, PETRI_PLACES=330, PETRI_TRANSITIONS=478} [2024-06-04 14:59:59,407 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 285 predicate places. [2024-06-04 14:59:59,407 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 478 transitions, 6086 flow [2024-06-04 14:59:59,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:59:59,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:59:59,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:59:59,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-04 14:59:59,407 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:59:59,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:59:59,408 INFO L85 PathProgramCache]: Analyzing trace with hash -2143136663, now seen corresponding path program 4 times [2024-06-04 14:59:59,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:59:59,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821386573] [2024-06-04 14:59:59,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:59:59,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:59:59,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:00:00,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:00:00,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:00:00,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821386573] [2024-06-04 15:00:00,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821386573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:00:00,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:00:00,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:00:00,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373857768] [2024-06-04 15:00:00,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:00:00,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:00:00,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:00:00,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:00:00,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:00:00,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 15:00:00,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 478 transitions, 6086 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:00,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:00:00,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 15:00:00,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:00:01,701 INFO L124 PetriNetUnfolderBase]: 4323/6449 cut-off events. [2024-06-04 15:00:01,701 INFO L125 PetriNetUnfolderBase]: For 1537090/1537126 co-relation queries the response was YES. [2024-06-04 15:00:01,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75618 conditions, 6449 events. 4323/6449 cut-off events. For 1537090/1537126 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 33900 event pairs, 1528 based on Foata normal form. 5/6392 useless extension candidates. Maximal degree in co-relation 75462. Up to 6192 conditions per place. [2024-06-04 15:00:01,798 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 446 selfloop transitions, 16 changer transitions 0/487 dead transitions. [2024-06-04 15:00:01,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 487 transitions, 7036 flow [2024-06-04 15:00:01,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:00:01,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:00:01,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-04 15:00:01,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35795454545454547 [2024-06-04 15:00:01,799 INFO L175 Difference]: Start difference. First operand has 330 places, 478 transitions, 6086 flow. Second operand 8 states and 126 transitions. [2024-06-04 15:00:01,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 487 transitions, 7036 flow [2024-06-04 15:00:04,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 487 transitions, 6803 flow, removed 82 selfloop flow, removed 8 redundant places. [2024-06-04 15:00:04,200 INFO L231 Difference]: Finished difference. Result has 330 places, 478 transitions, 5891 flow [2024-06-04 15:00:04,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5853, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5891, PETRI_PLACES=330, PETRI_TRANSITIONS=478} [2024-06-04 15:00:04,200 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 285 predicate places. [2024-06-04 15:00:04,200 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 478 transitions, 5891 flow [2024-06-04 15:00:04,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:04,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:00:04,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:00:04,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-04 15:00:04,201 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:00:04,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:00:04,201 INFO L85 PathProgramCache]: Analyzing trace with hash 607332123, now seen corresponding path program 3 times [2024-06-04 15:00:04,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:00:04,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683160619] [2024-06-04 15:00:04,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:00:04,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:00:04,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:00:04,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:00:04,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:00:04,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683160619] [2024-06-04 15:00:04,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683160619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:00:04,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:00:04,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:00:04,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051182158] [2024-06-04 15:00:04,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:00:04,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:00:04,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:00:04,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:00:04,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:00:05,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 15:00:05,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 478 transitions, 5891 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:05,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:00:05,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 15:00:05,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:00:06,383 INFO L124 PetriNetUnfolderBase]: 4090/6156 cut-off events. [2024-06-04 15:00:06,383 INFO L125 PetriNetUnfolderBase]: For 1583128/1583231 co-relation queries the response was YES. [2024-06-04 15:00:06,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73364 conditions, 6156 events. 4090/6156 cut-off events. For 1583128/1583231 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 32886 event pairs, 1443 based on Foata normal form. 28/6057 useless extension candidates. Maximal degree in co-relation 73207. Up to 5640 conditions per place. [2024-06-04 15:00:06,474 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 414 selfloop transitions, 17 changer transitions 0/494 dead transitions. [2024-06-04 15:00:06,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 494 transitions, 6895 flow [2024-06-04 15:00:06,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:00:06,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:00:06,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-04 15:00:06,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025974025974026 [2024-06-04 15:00:06,475 INFO L175 Difference]: Start difference. First operand has 330 places, 478 transitions, 5891 flow. Second operand 7 states and 124 transitions. [2024-06-04 15:00:06,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 494 transitions, 6895 flow [2024-06-04 15:00:08,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 494 transitions, 6818 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-04 15:00:08,648 INFO L231 Difference]: Finished difference. Result has 329 places, 483 transitions, 5972 flow [2024-06-04 15:00:08,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5814, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5972, PETRI_PLACES=329, PETRI_TRANSITIONS=483} [2024-06-04 15:00:08,648 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 284 predicate places. [2024-06-04 15:00:08,648 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 483 transitions, 5972 flow [2024-06-04 15:00:08,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:08,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:00:08,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:00:08,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-04 15:00:08,649 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:00:08,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:00:08,649 INFO L85 PathProgramCache]: Analyzing trace with hash 606856893, now seen corresponding path program 4 times [2024-06-04 15:00:08,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:00:08,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071627077] [2024-06-04 15:00:08,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:00:08,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:00:08,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:00:09,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:00:09,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:00:09,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071627077] [2024-06-04 15:00:09,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071627077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:00:09,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:00:09,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:00:09,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743186698] [2024-06-04 15:00:09,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:00:09,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:00:09,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:00:09,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:00:09,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:00:09,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 15:00:09,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 483 transitions, 5972 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:09,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:00:09,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 15:00:09,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:00:10,994 INFO L124 PetriNetUnfolderBase]: 4081/6144 cut-off events. [2024-06-04 15:00:10,994 INFO L125 PetriNetUnfolderBase]: For 1589589/1589692 co-relation queries the response was YES. [2024-06-04 15:00:11,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73317 conditions, 6144 events. 4081/6144 cut-off events. For 1589589/1589692 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 32863 event pairs, 1441 based on Foata normal form. 28/6045 useless extension candidates. Maximal degree in co-relation 73160. Up to 5616 conditions per place. [2024-06-04 15:00:11,083 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 409 selfloop transitions, 24 changer transitions 0/496 dead transitions. [2024-06-04 15:00:11,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 496 transitions, 6884 flow [2024-06-04 15:00:11,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:00:11,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:00:11,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-04 15:00:11,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2024-06-04 15:00:11,084 INFO L175 Difference]: Start difference. First operand has 329 places, 483 transitions, 5972 flow. Second operand 7 states and 128 transitions. [2024-06-04 15:00:11,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 496 transitions, 6884 flow [2024-06-04 15:00:14,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 496 transitions, 6736 flow, removed 58 selfloop flow, removed 5 redundant places. [2024-06-04 15:00:14,029 INFO L231 Difference]: Finished difference. Result has 331 places, 483 transitions, 5880 flow [2024-06-04 15:00:14,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5824, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5880, PETRI_PLACES=331, PETRI_TRANSITIONS=483} [2024-06-04 15:00:14,030 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 286 predicate places. [2024-06-04 15:00:14,030 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 483 transitions, 5880 flow [2024-06-04 15:00:14,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:14,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:00:14,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:00:14,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-04 15:00:14,030 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:00:14,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:00:14,031 INFO L85 PathProgramCache]: Analyzing trace with hash -16868781, now seen corresponding path program 1 times [2024-06-04 15:00:14,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:00:14,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748880475] [2024-06-04 15:00:14,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:00:14,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:00:14,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:00:14,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:00:14,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:00:14,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748880475] [2024-06-04 15:00:14,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748880475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:00:14,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:00:14,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:00:14,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460196240] [2024-06-04 15:00:14,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:00:14,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:00:14,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:00:14,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:00:14,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:00:14,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 15:00:14,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 483 transitions, 5880 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:14,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:00:14,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 15:00:14,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:00:16,431 INFO L124 PetriNetUnfolderBase]: 4425/6584 cut-off events. [2024-06-04 15:00:16,431 INFO L125 PetriNetUnfolderBase]: For 1635457/1635487 co-relation queries the response was YES. [2024-06-04 15:00:16,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75833 conditions, 6584 events. 4425/6584 cut-off events. For 1635457/1635487 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 34617 event pairs, 1594 based on Foata normal form. 15/6549 useless extension candidates. Maximal degree in co-relation 75675. Up to 6091 conditions per place. [2024-06-04 15:00:16,535 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 437 selfloop transitions, 33 changer transitions 0/511 dead transitions. [2024-06-04 15:00:16,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 511 transitions, 7242 flow [2024-06-04 15:00:16,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:00:16,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:00:16,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-04 15:00:16,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44155844155844154 [2024-06-04 15:00:16,537 INFO L175 Difference]: Start difference. First operand has 331 places, 483 transitions, 5880 flow. Second operand 7 states and 136 transitions. [2024-06-04 15:00:16,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 511 transitions, 7242 flow [2024-06-04 15:00:19,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 511 transitions, 7170 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-04 15:00:19,174 INFO L231 Difference]: Finished difference. Result has 333 places, 490 transitions, 6012 flow [2024-06-04 15:00:19,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5808, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6012, PETRI_PLACES=333, PETRI_TRANSITIONS=490} [2024-06-04 15:00:19,175 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 288 predicate places. [2024-06-04 15:00:19,175 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 490 transitions, 6012 flow [2024-06-04 15:00:19,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:19,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:00:19,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:00:19,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-04 15:00:19,175 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:00:19,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:00:19,176 INFO L85 PathProgramCache]: Analyzing trace with hash -2142653063, now seen corresponding path program 2 times [2024-06-04 15:00:19,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:00:19,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173447387] [2024-06-04 15:00:19,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:00:19,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:00:19,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:00:19,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:00:19,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:00:19,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173447387] [2024-06-04 15:00:19,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173447387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:00:19,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:00:19,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:00:19,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925196419] [2024-06-04 15:00:19,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:00:19,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:00:19,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:00:19,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:00:19,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:00:19,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 15:00:19,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 490 transitions, 6012 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:19,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:00:19,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 15:00:19,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:00:21,663 INFO L124 PetriNetUnfolderBase]: 4440/6606 cut-off events. [2024-06-04 15:00:21,664 INFO L125 PetriNetUnfolderBase]: For 1644912/1644948 co-relation queries the response was YES. [2024-06-04 15:00:21,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76981 conditions, 6606 events. 4440/6606 cut-off events. For 1644912/1644948 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 34770 event pairs, 1610 based on Foata normal form. 10/6565 useless extension candidates. Maximal degree in co-relation 76822. Up to 6099 conditions per place. [2024-06-04 15:00:21,772 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 433 selfloop transitions, 41 changer transitions 0/515 dead transitions. [2024-06-04 15:00:21,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 515 transitions, 7548 flow [2024-06-04 15:00:21,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:00:21,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:00:21,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-04 15:00:21,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4383116883116883 [2024-06-04 15:00:21,773 INFO L175 Difference]: Start difference. First operand has 333 places, 490 transitions, 6012 flow. Second operand 7 states and 135 transitions. [2024-06-04 15:00:21,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 515 transitions, 7548 flow [2024-06-04 15:00:25,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 515 transitions, 7440 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-04 15:00:25,048 INFO L231 Difference]: Finished difference. Result has 337 places, 496 transitions, 6135 flow [2024-06-04 15:00:25,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5912, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6135, PETRI_PLACES=337, PETRI_TRANSITIONS=496} [2024-06-04 15:00:25,049 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 292 predicate places. [2024-06-04 15:00:25,049 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 496 transitions, 6135 flow [2024-06-04 15:00:25,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:25,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:00:25,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:00:25,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-04 15:00:25,049 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:00:25,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:00:25,050 INFO L85 PathProgramCache]: Analyzing trace with hash 607102909, now seen corresponding path program 3 times [2024-06-04 15:00:25,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:00:25,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256190150] [2024-06-04 15:00:25,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:00:25,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:00:25,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:00:25,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:00:25,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:00:25,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256190150] [2024-06-04 15:00:25,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256190150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:00:25,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:00:25,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:00:25,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274743464] [2024-06-04 15:00:25,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:00:25,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:00:25,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:00:25,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:00:25,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:00:25,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 15:00:25,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 496 transitions, 6135 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:25,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:00:25,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 15:00:25,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:00:27,443 INFO L124 PetriNetUnfolderBase]: 4431/6594 cut-off events. [2024-06-04 15:00:27,443 INFO L125 PetriNetUnfolderBase]: For 1666869/1666905 co-relation queries the response was YES. [2024-06-04 15:00:27,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76935 conditions, 6594 events. 4431/6594 cut-off events. For 1666869/1666905 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 34697 event pairs, 1610 based on Foata normal form. 10/6553 useless extension candidates. Maximal degree in co-relation 76774. Up to 6095 conditions per place. [2024-06-04 15:00:27,546 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 436 selfloop transitions, 39 changer transitions 0/516 dead transitions. [2024-06-04 15:00:27,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 516 transitions, 7353 flow [2024-06-04 15:00:27,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:00:27,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:00:27,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-04 15:00:27,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4383116883116883 [2024-06-04 15:00:27,547 INFO L175 Difference]: Start difference. First operand has 337 places, 496 transitions, 6135 flow. Second operand 7 states and 135 transitions. [2024-06-04 15:00:27,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 516 transitions, 7353 flow [2024-06-04 15:00:30,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 516 transitions, 7213 flow, removed 54 selfloop flow, removed 3 redundant places. [2024-06-04 15:00:30,261 INFO L231 Difference]: Finished difference. Result has 341 places, 496 transitions, 6079 flow [2024-06-04 15:00:30,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5995, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6079, PETRI_PLACES=341, PETRI_TRANSITIONS=496} [2024-06-04 15:00:30,262 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 296 predicate places. [2024-06-04 15:00:30,262 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 496 transitions, 6079 flow [2024-06-04 15:00:30,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:30,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:00:30,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:00:30,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-04 15:00:30,262 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:00:30,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:00:30,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1428261265, now seen corresponding path program 1 times [2024-06-04 15:00:30,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:00:30,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741202757] [2024-06-04 15:00:30,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:00:30,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:00:30,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:00:31,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:00:31,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:00:31,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741202757] [2024-06-04 15:00:31,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741202757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:00:31,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:00:31,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 15:00:31,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208077117] [2024-06-04 15:00:31,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:00:31,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 15:00:31,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:00:31,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 15:00:31,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-04 15:00:31,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 15:00:31,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 496 transitions, 6079 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:31,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:00:31,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 15:00:31,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:00:33,488 INFO L124 PetriNetUnfolderBase]: 4585/6834 cut-off events. [2024-06-04 15:00:33,488 INFO L125 PetriNetUnfolderBase]: For 1780202/1780291 co-relation queries the response was YES. [2024-06-04 15:00:33,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80376 conditions, 6834 events. 4585/6834 cut-off events. For 1780202/1780291 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 36162 event pairs, 1323 based on Foata normal form. 6/6804 useless extension candidates. Maximal degree in co-relation 80213. Up to 6138 conditions per place. [2024-06-04 15:00:33,596 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 432 selfloop transitions, 55 changer transitions 0/577 dead transitions. [2024-06-04 15:00:33,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 577 transitions, 8064 flow [2024-06-04 15:00:33,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-04 15:00:33,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-04 15:00:33,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 257 transitions. [2024-06-04 15:00:33,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4172077922077922 [2024-06-04 15:00:33,597 INFO L175 Difference]: Start difference. First operand has 341 places, 496 transitions, 6079 flow. Second operand 14 states and 257 transitions. [2024-06-04 15:00:33,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 577 transitions, 8064 flow [2024-06-04 15:00:37,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 577 transitions, 7968 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-04 15:00:37,116 INFO L231 Difference]: Finished difference. Result has 353 places, 516 transitions, 6601 flow [2024-06-04 15:00:37,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5983, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6601, PETRI_PLACES=353, PETRI_TRANSITIONS=516} [2024-06-04 15:00:37,117 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 308 predicate places. [2024-06-04 15:00:37,117 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 516 transitions, 6601 flow [2024-06-04 15:00:37,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:37,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:00:37,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:00:37,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-04 15:00:37,118 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:00:37,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:00:37,118 INFO L85 PathProgramCache]: Analyzing trace with hash -369684617, now seen corresponding path program 2 times [2024-06-04 15:00:37,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:00:37,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752941229] [2024-06-04 15:00:37,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:00:37,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:00:37,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:00:37,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:00:37,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:00:37,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752941229] [2024-06-04 15:00:37,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752941229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:00:37,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:00:37,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:00:37,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617906920] [2024-06-04 15:00:37,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:00:37,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:00:37,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:00:37,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:00:37,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:00:37,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 15:00:37,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 516 transitions, 6601 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:37,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:00:37,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 15:00:37,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:00:39,783 INFO L124 PetriNetUnfolderBase]: 4503/6722 cut-off events. [2024-06-04 15:00:39,783 INFO L125 PetriNetUnfolderBase]: For 1760311/1760347 co-relation queries the response was YES. [2024-06-04 15:00:39,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80608 conditions, 6722 events. 4503/6722 cut-off events. For 1760311/1760347 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 35667 event pairs, 1272 based on Foata normal form. 7/6673 useless extension candidates. Maximal degree in co-relation 80440. Up to 6290 conditions per place. [2024-06-04 15:00:39,891 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 449 selfloop transitions, 72 changer transitions 0/546 dead transitions. [2024-06-04 15:00:39,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 546 transitions, 8181 flow [2024-06-04 15:00:39,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:00:39,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:00:39,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-04 15:00:39,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42676767676767674 [2024-06-04 15:00:39,892 INFO L175 Difference]: Start difference. First operand has 353 places, 516 transitions, 6601 flow. Second operand 9 states and 169 transitions. [2024-06-04 15:00:39,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 546 transitions, 8181 flow [2024-06-04 15:00:43,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 546 transitions, 7892 flow, removed 117 selfloop flow, removed 7 redundant places. [2024-06-04 15:00:43,173 INFO L231 Difference]: Finished difference. Result has 355 places, 519 transitions, 6509 flow [2024-06-04 15:00:43,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6312, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6509, PETRI_PLACES=355, PETRI_TRANSITIONS=519} [2024-06-04 15:00:43,174 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 310 predicate places. [2024-06-04 15:00:43,174 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 519 transitions, 6509 flow [2024-06-04 15:00:43,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:43,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:00:43,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:00:43,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-04 15:00:43,175 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:00:43,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:00:43,175 INFO L85 PathProgramCache]: Analyzing trace with hash 674402035, now seen corresponding path program 2 times [2024-06-04 15:00:43,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:00:43,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720702652] [2024-06-04 15:00:43,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:00:43,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:00:43,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:00:43,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:00:43,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:00:43,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720702652] [2024-06-04 15:00:43,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720702652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:00:43,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:00:43,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:00:43,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136606770] [2024-06-04 15:00:43,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:00:43,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:00:43,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:00:43,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:00:43,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:00:44,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 15:00:44,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 519 transitions, 6509 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:44,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:00:44,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 15:00:44,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:00:46,028 INFO L124 PetriNetUnfolderBase]: 4697/7002 cut-off events. [2024-06-04 15:00:46,029 INFO L125 PetriNetUnfolderBase]: For 1910975/1911105 co-relation queries the response was YES. [2024-06-04 15:00:46,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83560 conditions, 7002 events. 4697/7002 cut-off events. For 1910975/1911105 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 37319 event pairs, 1322 based on Foata normal form. 6/6963 useless extension candidates. Maximal degree in co-relation 83390. Up to 6197 conditions per place. [2024-06-04 15:00:46,139 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 427 selfloop transitions, 72 changer transitions 0/589 dead transitions. [2024-06-04 15:00:46,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 589 transitions, 8513 flow [2024-06-04 15:00:46,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 15:00:46,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 15:00:46,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 243 transitions. [2024-06-04 15:00:46,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42482517482517484 [2024-06-04 15:00:46,141 INFO L175 Difference]: Start difference. First operand has 355 places, 519 transitions, 6509 flow. Second operand 13 states and 243 transitions. [2024-06-04 15:00:46,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 589 transitions, 8513 flow [2024-06-04 15:00:48,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 589 transitions, 8388 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-04 15:00:48,939 INFO L231 Difference]: Finished difference. Result has 366 places, 534 transitions, 7015 flow [2024-06-04 15:00:48,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6384, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7015, PETRI_PLACES=366, PETRI_TRANSITIONS=534} [2024-06-04 15:00:48,940 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 321 predicate places. [2024-06-04 15:00:48,940 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 534 transitions, 7015 flow [2024-06-04 15:00:48,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:48,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:00:48,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:00:48,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-04 15:00:48,940 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:00:48,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:00:48,940 INFO L85 PathProgramCache]: Analyzing trace with hash -30662705, now seen corresponding path program 3 times [2024-06-04 15:00:48,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:00:48,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377666890] [2024-06-04 15:00:48,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:00:48,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:00:48,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:00:50,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:00:50,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:00:50,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377666890] [2024-06-04 15:00:50,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377666890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:00:50,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:00:50,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 15:00:50,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850745975] [2024-06-04 15:00:50,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:00:50,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 15:00:50,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:00:50,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 15:00:50,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-04 15:00:50,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 15:00:50,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 534 transitions, 7015 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:50,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:00:50,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 15:00:50,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:00:52,414 INFO L124 PetriNetUnfolderBase]: 4927/7355 cut-off events. [2024-06-04 15:00:52,414 INFO L125 PetriNetUnfolderBase]: For 2064892/2065145 co-relation queries the response was YES. [2024-06-04 15:00:52,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89532 conditions, 7355 events. 4927/7355 cut-off events. For 2064892/2065145 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 39874 event pairs, 1406 based on Foata normal form. 8/7311 useless extension candidates. Maximal degree in co-relation 89358. Up to 6554 conditions per place. [2024-06-04 15:00:52,532 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 466 selfloop transitions, 86 changer transitions 0/642 dead transitions. [2024-06-04 15:00:52,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 642 transitions, 10049 flow [2024-06-04 15:00:52,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 15:00:52,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 15:00:52,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 241 transitions. [2024-06-04 15:00:52,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42132867132867136 [2024-06-04 15:00:52,533 INFO L175 Difference]: Start difference. First operand has 366 places, 534 transitions, 7015 flow. Second operand 13 states and 241 transitions. [2024-06-04 15:00:52,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 642 transitions, 10049 flow [2024-06-04 15:00:56,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 642 transitions, 9482 flow, removed 259 selfloop flow, removed 6 redundant places. [2024-06-04 15:00:56,153 INFO L231 Difference]: Finished difference. Result has 378 places, 585 transitions, 8103 flow [2024-06-04 15:00:56,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6712, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8103, PETRI_PLACES=378, PETRI_TRANSITIONS=585} [2024-06-04 15:00:56,153 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 333 predicate places. [2024-06-04 15:00:56,153 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 585 transitions, 8103 flow [2024-06-04 15:00:56,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:56,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:00:56,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:00:56,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-04 15:00:56,154 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:00:56,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:00:56,154 INFO L85 PathProgramCache]: Analyzing trace with hash 268912789, now seen corresponding path program 4 times [2024-06-04 15:00:56,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:00:56,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386073994] [2024-06-04 15:00:56,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:00:56,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:00:56,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:00:56,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:00:56,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:00:56,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386073994] [2024-06-04 15:00:56,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386073994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:00:56,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:00:56,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:00:56,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484695676] [2024-06-04 15:00:56,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:00:56,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:00:56,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:00:56,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:00:56,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:00:57,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 15:00:57,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 585 transitions, 8103 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:00:57,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:00:57,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 15:00:57,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:00:59,216 INFO L124 PetriNetUnfolderBase]: 5183/7757 cut-off events. [2024-06-04 15:00:59,216 INFO L125 PetriNetUnfolderBase]: For 2235740/2235955 co-relation queries the response was YES. [2024-06-04 15:00:59,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96221 conditions, 7757 events. 5183/7757 cut-off events. For 2235740/2235955 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 42876 event pairs, 1190 based on Foata normal form. 8/7702 useless extension candidates. Maximal degree in co-relation 96041. Up to 6499 conditions per place. [2024-06-04 15:00:59,345 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 440 selfloop transitions, 140 changer transitions 0/670 dead transitions. [2024-06-04 15:00:59,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 670 transitions, 11598 flow [2024-06-04 15:00:59,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 15:00:59,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 15:00:59,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 226 transitions. [2024-06-04 15:00:59,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42803030303030304 [2024-06-04 15:00:59,346 INFO L175 Difference]: Start difference. First operand has 378 places, 585 transitions, 8103 flow. Second operand 12 states and 226 transitions. [2024-06-04 15:00:59,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 670 transitions, 11598 flow [2024-06-04 15:01:02,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 670 transitions, 10897 flow, removed 334 selfloop flow, removed 4 redundant places. [2024-06-04 15:01:02,995 INFO L231 Difference]: Finished difference. Result has 388 places, 618 transitions, 9337 flow [2024-06-04 15:01:02,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7826, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9337, PETRI_PLACES=388, PETRI_TRANSITIONS=618} [2024-06-04 15:01:02,995 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 343 predicate places. [2024-06-04 15:01:02,996 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 618 transitions, 9337 flow [2024-06-04 15:01:02,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:01:02,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:01:02,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:01:02,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-04 15:01:02,996 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:01:02,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:01:02,996 INFO L85 PathProgramCache]: Analyzing trace with hash 689269139, now seen corresponding path program 1 times [2024-06-04 15:01:02,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:01:02,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212269302] [2024-06-04 15:01:02,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:01:02,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:01:03,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:01:03,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:01:03,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:01:03,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212269302] [2024-06-04 15:01:03,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212269302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:01:03,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:01:03,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:01:03,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916334944] [2024-06-04 15:01:03,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:01:03,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:01:03,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:01:03,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:01:03,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:01:03,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 15:01:03,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 618 transitions, 9337 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:01:03,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:01:03,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 15:01:03,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:01:06,425 INFO L124 PetriNetUnfolderBase]: 5665/8405 cut-off events. [2024-06-04 15:01:06,425 INFO L125 PetriNetUnfolderBase]: For 2224018/2224023 co-relation queries the response was YES. [2024-06-04 15:01:06,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102640 conditions, 8405 events. 5665/8405 cut-off events. For 2224018/2224023 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 46120 event pairs, 1528 based on Foata normal form. 10/8413 useless extension candidates. Maximal degree in co-relation 102456. Up to 7573 conditions per place. [2024-06-04 15:01:06,570 INFO L140 encePairwiseOnDemand]: 28/44 looper letters, 599 selfloop transitions, 136 changer transitions 0/738 dead transitions. [2024-06-04 15:01:06,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 738 transitions, 13976 flow [2024-06-04 15:01:06,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 15:01:06,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 15:01:06,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 251 transitions. [2024-06-04 15:01:06,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4388111888111888 [2024-06-04 15:01:06,571 INFO L175 Difference]: Start difference. First operand has 388 places, 618 transitions, 9337 flow. Second operand 13 states and 251 transitions. [2024-06-04 15:01:06,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 738 transitions, 13976 flow [2024-06-04 15:01:10,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 738 transitions, 13534 flow, removed 162 selfloop flow, removed 8 redundant places. [2024-06-04 15:01:10,661 INFO L231 Difference]: Finished difference. Result has 395 places, 661 transitions, 10272 flow [2024-06-04 15:01:10,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8935, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=618, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10272, PETRI_PLACES=395, PETRI_TRANSITIONS=661} [2024-06-04 15:01:10,662 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 350 predicate places. [2024-06-04 15:01:10,662 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 661 transitions, 10272 flow [2024-06-04 15:01:10,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:01:10,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:01:10,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:01:10,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-04 15:01:10,662 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:01:10,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:01:10,663 INFO L85 PathProgramCache]: Analyzing trace with hash 689265295, now seen corresponding path program 5 times [2024-06-04 15:01:10,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:01:10,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312051394] [2024-06-04 15:01:10,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:01:10,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:01:10,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:01:11,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:01:11,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:01:11,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312051394] [2024-06-04 15:01:11,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312051394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:01:11,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:01:11,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:01:11,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004114581] [2024-06-04 15:01:11,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:01:11,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:01:11,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:01:11,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:01:11,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:01:11,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 15:01:11,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 661 transitions, 10272 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:01:11,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:01:11,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 15:01:11,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:01:14,245 INFO L124 PetriNetUnfolderBase]: 5528/8285 cut-off events. [2024-06-04 15:01:14,245 INFO L125 PetriNetUnfolderBase]: For 2376076/2376222 co-relation queries the response was YES. [2024-06-04 15:01:14,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103317 conditions, 8285 events. 5528/8285 cut-off events. For 2376076/2376222 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 46493 event pairs, 1501 based on Foata normal form. 21/8253 useless extension candidates. Maximal degree in co-relation 103130. Up to 7351 conditions per place. [2024-06-04 15:01:14,388 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 509 selfloop transitions, 115 changer transitions 0/725 dead transitions. [2024-06-04 15:01:14,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 725 transitions, 12411 flow [2024-06-04 15:01:14,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 15:01:14,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 15:01:14,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 238 transitions. [2024-06-04 15:01:14,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160839160839161 [2024-06-04 15:01:14,389 INFO L175 Difference]: Start difference. First operand has 395 places, 661 transitions, 10272 flow. Second operand 13 states and 238 transitions. [2024-06-04 15:01:14,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 725 transitions, 12411 flow [2024-06-04 15:01:19,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 725 transitions, 11976 flow, removed 175 selfloop flow, removed 5 redundant places. [2024-06-04 15:01:19,085 INFO L231 Difference]: Finished difference. Result has 403 places, 675 transitions, 10754 flow [2024-06-04 15:01:19,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9849, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10754, PETRI_PLACES=403, PETRI_TRANSITIONS=675} [2024-06-04 15:01:19,085 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 358 predicate places. [2024-06-04 15:01:19,085 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 675 transitions, 10754 flow [2024-06-04 15:01:19,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:01:19,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:01:19,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:01:19,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-04 15:01:19,086 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:01:19,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:01:19,086 INFO L85 PathProgramCache]: Analyzing trace with hash -28307821, now seen corresponding path program 2 times [2024-06-04 15:01:19,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:01:19,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909131243] [2024-06-04 15:01:19,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:01:19,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:01:19,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:01:20,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:01:20,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:01:20,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909131243] [2024-06-04 15:01:20,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909131243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:01:20,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:01:20,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 15:01:20,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816826051] [2024-06-04 15:01:20,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:01:20,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 15:01:20,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:01:20,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 15:01:20,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-04 15:01:20,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 15:01:20,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 675 transitions, 10754 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:01:20,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:01:20,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 15:01:20,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:01:23,558 INFO L124 PetriNetUnfolderBase]: 6061/8967 cut-off events. [2024-06-04 15:01:23,558 INFO L125 PetriNetUnfolderBase]: For 2408125/2408130 co-relation queries the response was YES. [2024-06-04 15:01:23,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110022 conditions, 8967 events. 6061/8967 cut-off events. For 2408125/2408130 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 49697 event pairs, 1664 based on Foata normal form. 14/8979 useless extension candidates. Maximal degree in co-relation 109833. Up to 8295 conditions per place. [2024-06-04 15:01:23,720 INFO L140 encePairwiseOnDemand]: 27/44 looper letters, 640 selfloop transitions, 152 changer transitions 0/795 dead transitions. [2024-06-04 15:01:23,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 795 transitions, 14979 flow [2024-06-04 15:01:23,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-04 15:01:23,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-04 15:01:23,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 262 transitions. [2024-06-04 15:01:23,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4253246753246753 [2024-06-04 15:01:23,722 INFO L175 Difference]: Start difference. First operand has 403 places, 675 transitions, 10754 flow. Second operand 14 states and 262 transitions. [2024-06-04 15:01:23,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 795 transitions, 14979 flow [2024-06-04 15:01:28,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 795 transitions, 14047 flow, removed 354 selfloop flow, removed 10 redundant places. [2024-06-04 15:01:28,660 INFO L231 Difference]: Finished difference. Result has 412 places, 732 transitions, 11480 flow [2024-06-04 15:01:28,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9832, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=11480, PETRI_PLACES=412, PETRI_TRANSITIONS=732} [2024-06-04 15:01:28,660 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 367 predicate places. [2024-06-04 15:01:28,660 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 732 transitions, 11480 flow [2024-06-04 15:01:28,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:01:28,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:01:28,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:01:28,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-04 15:01:28,661 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:01:28,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:01:28,661 INFO L85 PathProgramCache]: Analyzing trace with hash -28311665, now seen corresponding path program 6 times [2024-06-04 15:01:28,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:01:28,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999416324] [2024-06-04 15:01:28,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:01:28,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:01:28,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:01:29,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:01:29,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:01:29,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999416324] [2024-06-04 15:01:29,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999416324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:01:29,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:01:29,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 15:01:29,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749882318] [2024-06-04 15:01:29,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:01:29,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 15:01:29,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:01:29,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 15:01:29,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-04 15:01:30,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 15:01:30,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 732 transitions, 11480 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:01:30,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:01:30,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 15:01:30,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:01:33,215 INFO L124 PetriNetUnfolderBase]: 5814/8703 cut-off events. [2024-06-04 15:01:33,223 INFO L125 PetriNetUnfolderBase]: For 2444586/2444661 co-relation queries the response was YES. [2024-06-04 15:01:33,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107211 conditions, 8703 events. 5814/8703 cut-off events. For 2444586/2444661 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 49217 event pairs, 1598 based on Foata normal form. 14/8677 useless extension candidates. Maximal degree in co-relation 107016. Up to 7803 conditions per place. [2024-06-04 15:01:33,359 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 574 selfloop transitions, 90 changer transitions 0/782 dead transitions. [2024-06-04 15:01:33,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 782 transitions, 13018 flow [2024-06-04 15:01:33,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 15:01:33,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 15:01:33,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 236 transitions. [2024-06-04 15:01:33,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125874125874126 [2024-06-04 15:01:33,360 INFO L175 Difference]: Start difference. First operand has 412 places, 732 transitions, 11480 flow. Second operand 13 states and 236 transitions. [2024-06-04 15:01:33,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 782 transitions, 13018 flow [2024-06-04 15:01:38,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 782 transitions, 12193 flow, removed 379 selfloop flow, removed 4 redundant places. [2024-06-04 15:01:38,754 INFO L231 Difference]: Finished difference. Result has 421 places, 732 transitions, 10856 flow [2024-06-04 15:01:38,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10655, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=732, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=642, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10856, PETRI_PLACES=421, PETRI_TRANSITIONS=732} [2024-06-04 15:01:38,754 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 376 predicate places. [2024-06-04 15:01:38,754 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 732 transitions, 10856 flow [2024-06-04 15:01:38,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:01:38,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:01:38,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:01:38,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-04 15:01:38,755 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:01:38,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:01:38,755 INFO L85 PathProgramCache]: Analyzing trace with hash -673488753, now seen corresponding path program 1 times [2024-06-04 15:01:38,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:01:38,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018399682] [2024-06-04 15:01:38,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:01:38,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:01:38,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:01:39,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:01:39,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:01:39,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018399682] [2024-06-04 15:01:39,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018399682] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:01:39,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:01:39,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 15:01:39,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87280795] [2024-06-04 15:01:39,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:01:39,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 15:01:39,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:01:39,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 15:01:39,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-04 15:01:39,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 15:01:39,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 732 transitions, 10856 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:01:39,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:01:39,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 15:01:39,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:01:43,109 INFO L124 PetriNetUnfolderBase]: 6457/9543 cut-off events. [2024-06-04 15:01:43,110 INFO L125 PetriNetUnfolderBase]: For 2457256/2457267 co-relation queries the response was YES. [2024-06-04 15:01:43,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112579 conditions, 9543 events. 6457/9543 cut-off events. For 2457256/2457267 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 53515 event pairs, 1355 based on Foata normal form. 11/9551 useless extension candidates. Maximal degree in co-relation 112382. Up to 8078 conditions per place. [2024-06-04 15:01:43,264 INFO L140 encePairwiseOnDemand]: 28/44 looper letters, 656 selfloop transitions, 202 changer transitions 0/861 dead transitions. [2024-06-04 15:01:43,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 861 transitions, 14909 flow [2024-06-04 15:01:43,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 15:01:43,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 15:01:43,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 220 transitions. [2024-06-04 15:01:43,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-04 15:01:43,265 INFO L175 Difference]: Start difference. First operand has 421 places, 732 transitions, 10856 flow. Second operand 11 states and 220 transitions. [2024-06-04 15:01:43,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 861 transitions, 14909 flow [2024-06-04 15:01:47,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 861 transitions, 14742 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-04 15:01:47,630 INFO L231 Difference]: Finished difference. Result has 425 places, 786 transitions, 11994 flow [2024-06-04 15:01:47,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10689, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=732, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11994, PETRI_PLACES=425, PETRI_TRANSITIONS=786} [2024-06-04 15:01:47,630 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 380 predicate places. [2024-06-04 15:01:47,630 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 786 transitions, 11994 flow [2024-06-04 15:01:47,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:01:47,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:01:47,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:01:47,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-04 15:01:47,631 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:01:47,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:01:47,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1144491407, now seen corresponding path program 3 times [2024-06-04 15:01:47,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:01:47,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009787787] [2024-06-04 15:01:47,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:01:47,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:01:47,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:01:48,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:01:48,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:01:48,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009787787] [2024-06-04 15:01:48,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009787787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:01:48,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:01:48,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 15:01:48,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387063049] [2024-06-04 15:01:48,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:01:48,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 15:01:48,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:01:48,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 15:01:48,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2024-06-04 15:01:48,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 15:01:48,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 786 transitions, 11994 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:01:48,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:01:48,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 15:01:48,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:01:52,524 INFO L124 PetriNetUnfolderBase]: 7149/10530 cut-off events. [2024-06-04 15:01:52,524 INFO L125 PetriNetUnfolderBase]: For 2640042/2640051 co-relation queries the response was YES. [2024-06-04 15:01:52,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122836 conditions, 10530 events. 7149/10530 cut-off events. For 2640042/2640051 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 59984 event pairs, 1371 based on Foata normal form. 9/10536 useless extension candidates. Maximal degree in co-relation 122635. Up to 8367 conditions per place. [2024-06-04 15:01:52,707 INFO L140 encePairwiseOnDemand]: 26/44 looper letters, 828 selfloop transitions, 309 changer transitions 0/1140 dead transitions. [2024-06-04 15:01:52,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 1140 transitions, 19273 flow [2024-06-04 15:01:52,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 15:01:52,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 15:01:52,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 239 transitions. [2024-06-04 15:01:52,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45265151515151514 [2024-06-04 15:01:52,708 INFO L175 Difference]: Start difference. First operand has 425 places, 786 transitions, 11994 flow. Second operand 12 states and 239 transitions. [2024-06-04 15:01:52,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 1140 transitions, 19273 flow [2024-06-04 15:01:57,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 1140 transitions, 18672 flow, removed 104 selfloop flow, removed 7 redundant places. [2024-06-04 15:01:57,624 INFO L231 Difference]: Finished difference. Result has 437 places, 971 transitions, 15106 flow [2024-06-04 15:01:57,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11510, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=786, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=15106, PETRI_PLACES=437, PETRI_TRANSITIONS=971} [2024-06-04 15:01:57,625 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 392 predicate places. [2024-06-04 15:01:57,625 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 971 transitions, 15106 flow [2024-06-04 15:01:57,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:01:57,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:01:57,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:01:57,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-04 15:01:57,625 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:01:57,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:01:57,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1144664387, now seen corresponding path program 4 times [2024-06-04 15:01:57,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:01:57,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883555943] [2024-06-04 15:01:57,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:01:57,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:01:57,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:01:58,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:01:58,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:01:58,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883555943] [2024-06-04 15:01:58,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883555943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:01:58,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:01:58,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 15:01:58,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859946217] [2024-06-04 15:01:58,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:01:58,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 15:01:58,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:01:58,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 15:01:58,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2024-06-04 15:01:58,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 15:01:58,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 971 transitions, 15106 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:01:58,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:01:58,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 15:01:58,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:02:02,638 INFO L124 PetriNetUnfolderBase]: 7185/10582 cut-off events. [2024-06-04 15:02:02,638 INFO L125 PetriNetUnfolderBase]: For 2701887/2701896 co-relation queries the response was YES. [2024-06-04 15:02:02,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128636 conditions, 10582 events. 7185/10582 cut-off events. For 2701887/2701896 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 60230 event pairs, 1400 based on Foata normal form. 9/10588 useless extension candidates. Maximal degree in co-relation 128429. Up to 8419 conditions per place. [2024-06-04 15:02:02,818 INFO L140 encePairwiseOnDemand]: 26/44 looper letters, 845 selfloop transitions, 297 changer transitions 0/1145 dead transitions. [2024-06-04 15:02:02,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 1145 transitions, 20464 flow [2024-06-04 15:02:02,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 15:02:02,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 15:02:02,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 240 transitions. [2024-06-04 15:02:02,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-04 15:02:02,819 INFO L175 Difference]: Start difference. First operand has 437 places, 971 transitions, 15106 flow. Second operand 12 states and 240 transitions. [2024-06-04 15:02:02,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 1145 transitions, 20464 flow [2024-06-04 15:02:08,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 1145 transitions, 20224 flow, removed 112 selfloop flow, removed 2 redundant places. [2024-06-04 15:02:08,270 INFO L231 Difference]: Finished difference. Result has 447 places, 975 transitions, 15705 flow [2024-06-04 15:02:08,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14866, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=971, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=293, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=674, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=15705, PETRI_PLACES=447, PETRI_TRANSITIONS=975} [2024-06-04 15:02:08,270 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 402 predicate places. [2024-06-04 15:02:08,271 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 975 transitions, 15705 flow [2024-06-04 15:02:08,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:02:08,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:02:08,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:02:08,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-04 15:02:08,271 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:02:08,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:02:08,271 INFO L85 PathProgramCache]: Analyzing trace with hash 712876589, now seen corresponding path program 5 times [2024-06-04 15:02:08,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:02:08,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372765180] [2024-06-04 15:02:08,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:02:08,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:02:08,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:02:09,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:02:09,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:02:09,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372765180] [2024-06-04 15:02:09,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372765180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:02:09,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:02:09,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 15:02:09,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518288902] [2024-06-04 15:02:09,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:02:09,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 15:02:09,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:02:09,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 15:02:09,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-04 15:02:09,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-04 15:02:09,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 975 transitions, 15705 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:02:09,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:02:09,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-04 15:02:09,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:02:13,504 INFO L124 PetriNetUnfolderBase]: 7256/10683 cut-off events. [2024-06-04 15:02:13,504 INFO L125 PetriNetUnfolderBase]: For 2767770/2767779 co-relation queries the response was YES. [2024-06-04 15:02:13,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132226 conditions, 10683 events. 7256/10683 cut-off events. For 2767770/2767779 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 60883 event pairs, 1390 based on Foata normal form. 9/10689 useless extension candidates. Maximal degree in co-relation 132017. Up to 8419 conditions per place. [2024-06-04 15:02:13,705 INFO L140 encePairwiseOnDemand]: 26/44 looper letters, 849 selfloop transitions, 310 changer transitions 0/1162 dead transitions. [2024-06-04 15:02:13,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 1162 transitions, 21529 flow [2024-06-04 15:02:13,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 15:02:13,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 15:02:13,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 259 transitions. [2024-06-04 15:02:13,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4527972027972028 [2024-06-04 15:02:13,706 INFO L175 Difference]: Start difference. First operand has 447 places, 975 transitions, 15705 flow. Second operand 13 states and 259 transitions. [2024-06-04 15:02:13,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 1162 transitions, 21529 flow [2024-06-04 15:02:19,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 1162 transitions, 20872 flow, removed 110 selfloop flow, removed 6 redundant places. [2024-06-04 15:02:19,521 INFO L231 Difference]: Finished difference. Result has 455 places, 985 transitions, 16101 flow [2024-06-04 15:02:19,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=15048, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=975, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=303, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=668, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=16101, PETRI_PLACES=455, PETRI_TRANSITIONS=985} [2024-06-04 15:02:19,522 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 410 predicate places. [2024-06-04 15:02:19,522 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 985 transitions, 16101 flow [2024-06-04 15:02:19,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:02:19,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:02:19,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:02:19,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-04 15:02:19,522 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:02:19,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:02:19,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1144669161, now seen corresponding path program 7 times [2024-06-04 15:02:19,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:02:19,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079559628] [2024-06-04 15:02:19,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:02:19,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:02:19,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:02:20,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:02:20,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:02:20,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079559628] [2024-06-04 15:02:20,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079559628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:02:20,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:02:20,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 15:02:20,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365654863] [2024-06-04 15:02:20,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:02:20,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 15:02:20,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:02:20,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 15:02:20,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-04 15:02:20,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 15:02:20,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 985 transitions, 16101 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:02:20,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:02:20,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 15:02:20,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:02:24,695 INFO L124 PetriNetUnfolderBase]: 7045/10504 cut-off events. [2024-06-04 15:02:24,696 INFO L125 PetriNetUnfolderBase]: For 2935418/2935534 co-relation queries the response was YES. [2024-06-04 15:02:24,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132414 conditions, 10504 events. 7045/10504 cut-off events. For 2935418/2935534 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 61302 event pairs, 1592 based on Foata normal form. 12/10461 useless extension candidates. Maximal degree in co-relation 132203. Up to 9248 conditions per place. [2024-06-04 15:02:25,057 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 726 selfloop transitions, 126 changer transitions 0/1053 dead transitions. [2024-06-04 15:02:25,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 1053 transitions, 18457 flow [2024-06-04 15:02:25,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 15:02:25,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 15:02:25,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 224 transitions. [2024-06-04 15:02:25,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-04 15:02:25,058 INFO L175 Difference]: Start difference. First operand has 455 places, 985 transitions, 16101 flow. Second operand 12 states and 224 transitions. [2024-06-04 15:02:25,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 1053 transitions, 18457 flow [2024-06-04 15:02:30,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 1053 transitions, 17819 flow, removed 143 selfloop flow, removed 8 redundant places. [2024-06-04 15:02:30,761 INFO L231 Difference]: Finished difference. Result has 461 places, 1008 transitions, 16182 flow [2024-06-04 15:02:30,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=15467, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=985, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=877, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=16182, PETRI_PLACES=461, PETRI_TRANSITIONS=1008} [2024-06-04 15:02:30,762 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 416 predicate places. [2024-06-04 15:02:30,762 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 1008 transitions, 16182 flow [2024-06-04 15:02:30,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:02:30,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:02:30,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:02:30,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-04 15:02:30,762 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:02:30,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:02:30,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1104942100, now seen corresponding path program 1 times [2024-06-04 15:02:30,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:02:30,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956529093] [2024-06-04 15:02:30,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:02:30,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:02:30,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:02:31,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:02:31,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:02:31,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956529093] [2024-06-04 15:02:31,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956529093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:02:31,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:02:31,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:02:31,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693106991] [2024-06-04 15:02:31,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:02:31,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:02:31,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:02:31,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:02:31,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:02:31,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 15:02:31,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 1008 transitions, 16182 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:02:31,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:02:31,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 15:02:31,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:02:35,140 INFO L124 PetriNetUnfolderBase]: 6852/10253 cut-off events. [2024-06-04 15:02:35,141 INFO L125 PetriNetUnfolderBase]: For 2873532/2873668 co-relation queries the response was YES. [2024-06-04 15:02:35,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130276 conditions, 10253 events. 6852/10253 cut-off events. For 2873532/2873668 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 60024 event pairs, 1723 based on Foata normal form. 30/10241 useless extension candidates. Maximal degree in co-relation 130061. Up to 9666 conditions per place. [2024-06-04 15:02:35,362 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 901 selfloop transitions, 88 changer transitions 0/1038 dead transitions. [2024-06-04 15:02:35,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 1038 transitions, 18524 flow [2024-06-04 15:02:35,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 15:02:35,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 15:02:35,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-04 15:02:35,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42676767676767674 [2024-06-04 15:02:35,363 INFO L175 Difference]: Start difference. First operand has 461 places, 1008 transitions, 16182 flow. Second operand 9 states and 169 transitions. [2024-06-04 15:02:35,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 1038 transitions, 18524 flow [2024-06-04 15:02:41,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 1038 transitions, 18070 flow, removed 156 selfloop flow, removed 5 redundant places. [2024-06-04 15:02:41,354 INFO L231 Difference]: Finished difference. Result has 465 places, 1008 transitions, 15920 flow [2024-06-04 15:02:41,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=15728, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1008, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=920, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15920, PETRI_PLACES=465, PETRI_TRANSITIONS=1008} [2024-06-04 15:02:41,355 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 420 predicate places. [2024-06-04 15:02:41,355 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 1008 transitions, 15920 flow [2024-06-04 15:02:41,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:02:41,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:02:41,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:02:41,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-04 15:02:41,356 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 15:02:41,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:02:41,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1178475139, now seen corresponding path program 8 times [2024-06-04 15:02:41,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:02:41,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245650699] [2024-06-04 15:02:41,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:02:41,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:02:41,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:02:42,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:02:42,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:02:42,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245650699] [2024-06-04 15:02:42,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245650699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:02:42,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:02:42,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-04 15:02:42,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761444603] [2024-06-04 15:02:42,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:02:42,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-04 15:02:42,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:02:42,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-04 15:02:42,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-04 15:02:42,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 15:02:42,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 1008 transitions, 15920 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:02:42,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:02:42,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 15:02:42,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:02:47,016 INFO L124 PetriNetUnfolderBase]: 7418/11090 cut-off events. [2024-06-04 15:02:47,016 INFO L125 PetriNetUnfolderBase]: For 3026476/3026552 co-relation queries the response was YES. [2024-06-04 15:02:47,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138235 conditions, 11090 events. 7418/11090 cut-off events. For 3026476/3026552 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 65582 event pairs, 1720 based on Foata normal form. 10/11068 useless extension candidates. Maximal degree in co-relation 138019. Up to 9711 conditions per place.