./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 cde23df1 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-cde23df-m [2024-06-14 12:09:33,972 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 12:09:34,049 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 12:09:34,054 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 12:09:34,054 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 12:09:34,089 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 12:09:34,090 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 12:09:34,090 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 12:09:34,091 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 12:09:34,096 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 12:09:34,096 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 12:09:34,097 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 12:09:34,098 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 12:09:34,099 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 12:09:34,099 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 12:09:34,100 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 12:09:34,100 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 12:09:34,100 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 12:09:34,100 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 12:09:34,101 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 12:09:34,101 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 12:09:34,101 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 12:09:34,102 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 12:09:34,102 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 12:09:34,102 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 12:09:34,102 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 12:09:34,103 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 12:09:34,103 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 12:09:34,103 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 12:09:34,104 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 12:09:34,105 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 12:09:34,105 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 12:09:34,105 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:09:34,105 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 12:09:34,106 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 12:09:34,106 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 12:09:34,106 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 12:09:34,106 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 12:09:34,106 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 12:09:34,107 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 12:09:34,107 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 12:09:34,107 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 12:09:34,107 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 12:09:34,107 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 12:09:34,352 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 12:09:34,372 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 12:09:34,375 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 12:09:34,377 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 12:09:34,377 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 12:09:34,378 INFO L431 ainManager$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 [2024-06-14 12:09:35,489 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 12:09:35,737 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 12:09:35,738 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix024_power.oepc_pso.oepc_rmo.oepc_tso.oepc_tso.opt.i [2024-06-14 12:09:35,750 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5ec17128/deb5dea2925545f197eccb192a072eba/FLAG2b8676a14 [2024-06-14 12:09:35,762 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5ec17128/deb5dea2925545f197eccb192a072eba [2024-06-14 12:09:35,765 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 12:09:35,766 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 12:09:35,766 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix024_power.oepc_pso.oepc_rmo.oepc_tso.oepc_tso.opt.yml/witness.yml [2024-06-14 12:09:35,959 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 12:09:35,960 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 12:09:35,961 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 12:09:35,961 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 12:09:35,965 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 12:09:35,966 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:09:35" (1/2) ... [2024-06-14 12:09:35,967 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40f36764 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:09:35, skipping insertion in model container [2024-06-14 12:09:35,967 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:09:35" (1/2) ... [2024-06-14 12:09:35,968 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@312ce9bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:09:35, skipping insertion in model container [2024-06-14 12:09:35,969 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:09:35" (2/2) ... [2024-06-14 12:09:35,969 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40f36764 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:09:35, skipping insertion in model container [2024-06-14 12:09:35,969 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:09:35" (2/2) ... [2024-06-14 12:09:35,970 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 12:09:36,066 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 12:09:36,067 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$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) [2024-06-14 12:09:36,068 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] ((((((((((((((((((((! multithreaded || a$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))) [2024-06-14 12:09:36,068 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))) [2024-06-14 12:09:36,068 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 12:09:36,068 INFO L106 edCorrectnessWitness]: ghost_update [L849-L849] multithreaded = 1; [2024-06-14 12:09:36,143 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 12:09:36,622 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:09:36,635 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 12:09:36,749 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:09:36,800 INFO L206 MainTranslator]: Completed translation [2024-06-14 12:09:36,801 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:09:36 WrapperNode [2024-06-14 12:09:36,801 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 12:09:36,802 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 12:09:36,802 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 12:09:36,802 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 12:09:36,809 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 14.06 12:09:36" (1/1) ... [2024-06-14 12:09:36,847 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 14.06 12:09:36" (1/1) ... [2024-06-14 12:09:36,888 INFO L138 Inliner]: procedures = 175, calls = 49, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 134 [2024-06-14 12:09:36,888 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 12:09:36,889 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 12:09:36,889 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 12:09:36,889 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 12:09:36,902 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:09:36" (1/1) ... [2024-06-14 12:09:36,902 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:09:36" (1/1) ... [2024-06-14 12:09:36,920 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:09:36" (1/1) ... [2024-06-14 12:09:36,937 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]. [2024-06-14 12:09:36,937 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:09:36" (1/1) ... [2024-06-14 12:09:36,937 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:09:36" (1/1) ... [2024-06-14 12:09:36,960 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:09:36" (1/1) ... [2024-06-14 12:09:36,962 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:09:36" (1/1) ... [2024-06-14 12:09:36,964 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:09:36" (1/1) ... [2024-06-14 12:09:36,965 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:09:36" (1/1) ... [2024-06-14 12:09:36,969 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 12:09:36,970 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 12:09:36,970 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 12:09:36,970 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 12:09:36,971 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:09:36" (1/1) ... [2024-06-14 12:09:36,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:09:36,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 12:09:37,018 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) [2024-06-14 12:09:37,023 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 [2024-06-14 12:09:37,055 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 12:09:37,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 12:09:37,056 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 12:09:37,056 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 12:09:37,057 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 12:09:37,057 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 12:09:37,057 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 12:09:37,057 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 12:09:37,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 12:09:37,057 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 12:09:37,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 12:09:37,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 12:09:37,059 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 12:09:37,197 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 12:09:37,199 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 12:09:37,556 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 12:09:37,556 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 12:09:37,777 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 12:09:37,777 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 12:09:37,778 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:09:37 BoogieIcfgContainer [2024-06-14 12:09:37,778 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 12:09:37,781 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 12:09:37,781 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 12:09:37,783 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 12:09:37,784 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 12:09:35" (1/4) ... [2024-06-14 12:09:37,784 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2719fd72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:09:37, skipping insertion in model container [2024-06-14 12:09:37,784 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:09:35" (2/4) ... [2024-06-14 12:09:37,785 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2719fd72 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:09:37, skipping insertion in model container [2024-06-14 12:09:37,785 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:09:36" (3/4) ... [2024-06-14 12:09:37,785 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2719fd72 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:09:37, skipping insertion in model container [2024-06-14 12:09:37,785 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:09:37" (4/4) ... [2024-06-14 12:09:37,786 INFO L112 eAbstractionObserver]: Analyzing ICFG mix024_power.oepc_pso.oepc_rmo.oepc_tso.oepc_tso.opt.i [2024-06-14 12:09:37,803 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 12:09:37,803 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 12:09:37,804 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 12:09:37,851 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 12:09:37,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 44 transitions, 100 flow [2024-06-14 12:09:37,921 INFO L124 PetriNetUnfolderBase]: 0/41 cut-off events. [2024-06-14 12:09:37,922 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:09:37,923 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. [2024-06-14 12:09:37,924 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 44 transitions, 100 flow [2024-06-14 12:09:37,927 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 35 transitions, 79 flow [2024-06-14 12:09:37,943 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 12:09:37,951 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;@7e58a6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 12:09:37,951 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 12:09:37,957 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 12:09:37,957 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 12:09:37,958 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:09:37,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:37,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 12:09:37,959 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)] === [2024-06-14 12:09:37,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:37,964 INFO L85 PathProgramCache]: Analyzing trace with hash -971387301, now seen corresponding path program 1 times [2024-06-14 12:09:37,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:37,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448084525] [2024-06-14 12:09:37,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:37,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:38,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:39,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:39,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:39,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448084525] [2024-06-14 12:09:39,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448084525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:39,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:39,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 12:09:39,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386497706] [2024-06-14 12:09:39,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:39,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 12:09:39,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:39,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 12:09:39,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 12:09:39,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 12:09:39,507 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) [2024-06-14 12:09:39,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:39,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 12:09:39,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:40,078 INFO L124 PetriNetUnfolderBase]: 1659/2554 cut-off events. [2024-06-14 12:09:40,078 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2024-06-14 12:09:40,084 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. [2024-06-14 12:09:40,098 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 35 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-14 12:09:40,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 183 flow [2024-06-14 12:09:40,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 12:09:40,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 12:09:40,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 78 transitions. [2024-06-14 12:09:40,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-06-14 12:09:40,110 INFO L175 Difference]: Start difference. First operand has 45 places, 35 transitions, 79 flow. Second operand 3 states and 78 transitions. [2024-06-14 12:09:40,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 183 flow [2024-06-14 12:09:40,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 178 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 12:09:40,115 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 106 flow [2024-06-14 12:09:40,117 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} [2024-06-14 12:09:40,120 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2024-06-14 12:09:40,120 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 106 flow [2024-06-14 12:09:40,120 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) [2024-06-14 12:09:40,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:40,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:09:40,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 12:09:40,121 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)] === [2024-06-14 12:09:40,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:40,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1495254150, now seen corresponding path program 1 times [2024-06-14 12:09:40,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:40,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806458573] [2024-06-14 12:09:40,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:40,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:40,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:41,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:41,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:41,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806458573] [2024-06-14 12:09:41,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806458573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:41,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:41,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 12:09:41,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9946074] [2024-06-14 12:09:41,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:41,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 12:09:41,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:41,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 12:09:41,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-14 12:09:41,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 12:09:41,241 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) [2024-06-14 12:09:41,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:41,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 12:09:41,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:41,694 INFO L124 PetriNetUnfolderBase]: 1653/2545 cut-off events. [2024-06-14 12:09:41,694 INFO L125 PetriNetUnfolderBase]: For 467/467 co-relation queries the response was YES. [2024-06-14 12:09:41,697 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. [2024-06-14 12:09:41,710 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 42 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-14 12:09:41,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 55 transitions, 250 flow [2024-06-14 12:09:41,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 12:09:41,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 12:09:41,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-06-14 12:09:41,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-14 12:09:41,714 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 106 flow. Second operand 4 states and 100 transitions. [2024-06-14 12:09:41,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 55 transitions, 250 flow [2024-06-14 12:09:41,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 55 transitions, 246 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 12:09:41,717 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 142 flow [2024-06-14 12:09:41,718 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} [2024-06-14 12:09:41,718 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2024-06-14 12:09:41,719 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 142 flow [2024-06-14 12:09:41,719 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) [2024-06-14 12:09:41,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:41,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:09:41,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 12:09:41,722 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)] === [2024-06-14 12:09:41,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:41,723 INFO L85 PathProgramCache]: Analyzing trace with hash 891762882, now seen corresponding path program 1 times [2024-06-14 12:09:41,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:41,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629037052] [2024-06-14 12:09:41,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:41,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:41,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:43,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:43,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:43,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629037052] [2024-06-14 12:09:43,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629037052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:43,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:43,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 12:09:43,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756507975] [2024-06-14 12:09:43,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:43,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 12:09:43,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:43,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 12:09:43,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-14 12:09:43,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:09:43,102 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) [2024-06-14 12:09:43,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:43,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:09:43,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:43,632 INFO L124 PetriNetUnfolderBase]: 1947/2974 cut-off events. [2024-06-14 12:09:43,632 INFO L125 PetriNetUnfolderBase]: For 1495/1495 co-relation queries the response was YES. [2024-06-14 12:09:43,637 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. [2024-06-14 12:09:43,652 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 50 selfloop transitions, 10 changer transitions 0/65 dead transitions. [2024-06-14 12:09:43,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 65 transitions, 330 flow [2024-06-14 12:09:43,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:09:43,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:09:43,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-14 12:09:43,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5363636363636364 [2024-06-14 12:09:43,662 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 142 flow. Second operand 5 states and 118 transitions. [2024-06-14 12:09:43,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 65 transitions, 330 flow [2024-06-14 12:09:43,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 65 transitions, 316 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-14 12:09:43,666 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 178 flow [2024-06-14 12:09:43,666 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} [2024-06-14 12:09:43,667 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 6 predicate places. [2024-06-14 12:09:43,667 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 178 flow [2024-06-14 12:09:43,667 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) [2024-06-14 12:09:43,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:43,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:09:43,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 12:09:43,668 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)] === [2024-06-14 12:09:43,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:43,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1874846873, now seen corresponding path program 1 times [2024-06-14 12:09:43,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:43,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045448942] [2024-06-14 12:09:43,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:43,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:43,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:44,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:44,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:44,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045448942] [2024-06-14 12:09:44,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045448942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:44,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:44,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:09:44,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294294836] [2024-06-14 12:09:44,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:44,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:09:44,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:44,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:09:44,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:09:45,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-14 12:09:45,096 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) [2024-06-14 12:09:45,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:45,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-14 12:09:45,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:45,615 INFO L124 PetriNetUnfolderBase]: 1941/2941 cut-off events. [2024-06-14 12:09:45,615 INFO L125 PetriNetUnfolderBase]: For 2827/2827 co-relation queries the response was YES. [2024-06-14 12:09:45,621 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. [2024-06-14 12:09:45,635 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 57 selfloop transitions, 13 changer transitions 0/75 dead transitions. [2024-06-14 12:09:45,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 75 transitions, 408 flow [2024-06-14 12:09:45,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:09:45,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:09:45,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-14 12:09:45,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5265151515151515 [2024-06-14 12:09:45,637 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 178 flow. Second operand 6 states and 139 transitions. [2024-06-14 12:09:45,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 75 transitions, 408 flow [2024-06-14 12:09:45,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 75 transitions, 384 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 12:09:45,641 INFO L231 Difference]: Finished difference. Result has 54 places, 47 transitions, 214 flow [2024-06-14 12:09:45,641 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} [2024-06-14 12:09:45,642 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 9 predicate places. [2024-06-14 12:09:45,642 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 47 transitions, 214 flow [2024-06-14 12:09:45,642 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) [2024-06-14 12:09:45,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:45,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:09:45,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 12:09:45,643 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)] === [2024-06-14 12:09:45,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:45,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1535487544, now seen corresponding path program 1 times [2024-06-14 12:09:45,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:45,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745830895] [2024-06-14 12:09:45,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:45,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:45,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:46,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:46,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:46,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745830895] [2024-06-14 12:09:46,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745830895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:46,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:46,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:09:46,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729967552] [2024-06-14 12:09:46,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:46,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:09:46,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:46,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:09:46,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:09:46,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:09:46,473 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) [2024-06-14 12:09:46,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:46,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:09:46,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:47,165 INFO L124 PetriNetUnfolderBase]: 2135/3308 cut-off events. [2024-06-14 12:09:47,165 INFO L125 PetriNetUnfolderBase]: For 4911/4911 co-relation queries the response was YES. [2024-06-14 12:09:47,172 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. [2024-06-14 12:09:47,190 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 47 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2024-06-14 12:09:47,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 61 transitions, 368 flow [2024-06-14 12:09:47,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:09:47,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:09:47,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 99 transitions. [2024-06-14 12:09:47,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-14 12:09:47,192 INFO L175 Difference]: Start difference. First operand has 54 places, 47 transitions, 214 flow. Second operand 5 states and 99 transitions. [2024-06-14 12:09:47,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 61 transitions, 368 flow [2024-06-14 12:09:47,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 61 transitions, 334 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-14 12:09:47,203 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 226 flow [2024-06-14 12:09:47,203 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} [2024-06-14 12:09:47,205 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 10 predicate places. [2024-06-14 12:09:47,205 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 226 flow [2024-06-14 12:09:47,206 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) [2024-06-14 12:09:47,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:47,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:09:47,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 12:09:47,207 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)] === [2024-06-14 12:09:47,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:47,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1170679966, now seen corresponding path program 1 times [2024-06-14 12:09:47,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:47,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154313011] [2024-06-14 12:09:47,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:47,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:47,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:48,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:49,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:49,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154313011] [2024-06-14 12:09:49,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154313011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:49,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:49,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:09:49,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967888088] [2024-06-14 12:09:49,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:49,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:09:49,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:49,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:09:49,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:09:49,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:09:49,179 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) [2024-06-14 12:09:49,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:49,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:09:49,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:49,873 INFO L124 PetriNetUnfolderBase]: 2224/3384 cut-off events. [2024-06-14 12:09:49,873 INFO L125 PetriNetUnfolderBase]: For 6864/6864 co-relation queries the response was YES. [2024-06-14 12:09:49,879 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. [2024-06-14 12:09:49,898 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 75 selfloop transitions, 19 changer transitions 0/98 dead transitions. [2024-06-14 12:09:49,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 98 transitions, 556 flow [2024-06-14 12:09:49,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:09:49,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:09:49,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-14 12:09:49,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4943181818181818 [2024-06-14 12:09:49,901 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 226 flow. Second operand 8 states and 174 transitions. [2024-06-14 12:09:49,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 98 transitions, 556 flow [2024-06-14 12:09:49,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 98 transitions, 534 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-14 12:09:49,907 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 298 flow [2024-06-14 12:09:49,907 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} [2024-06-14 12:09:49,909 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 16 predicate places. [2024-06-14 12:09:49,909 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 298 flow [2024-06-14 12:09:49,909 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) [2024-06-14 12:09:49,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:49,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:09:49,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 12:09:49,910 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)] === [2024-06-14 12:09:49,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:49,911 INFO L85 PathProgramCache]: Analyzing trace with hash 355475342, now seen corresponding path program 1 times [2024-06-14 12:09:49,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:49,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426492395] [2024-06-14 12:09:49,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:49,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:49,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:50,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:50,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:50,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426492395] [2024-06-14 12:09:50,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426492395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:50,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:50,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:09:50,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450857132] [2024-06-14 12:09:50,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:50,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:09:50,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:50,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:09:50,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:09:50,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:09:50,889 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) [2024-06-14 12:09:50,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:50,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:09:50,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:51,710 INFO L124 PetriNetUnfolderBase]: 2462/3682 cut-off events. [2024-06-14 12:09:51,710 INFO L125 PetriNetUnfolderBase]: For 10921/10921 co-relation queries the response was YES. [2024-06-14 12:09:51,718 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. [2024-06-14 12:09:51,731 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 64 selfloop transitions, 17 changer transitions 0/86 dead transitions. [2024-06-14 12:09:51,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 86 transitions, 588 flow [2024-06-14 12:09:51,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:09:51,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:09:51,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-14 12:09:51,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45075757575757575 [2024-06-14 12:09:51,733 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 298 flow. Second operand 6 states and 119 transitions. [2024-06-14 12:09:51,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 86 transitions, 588 flow [2024-06-14 12:09:51,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 86 transitions, 538 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 12:09:51,740 INFO L231 Difference]: Finished difference. Result has 64 places, 67 transitions, 377 flow [2024-06-14 12:09:51,741 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} [2024-06-14 12:09:51,741 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 19 predicate places. [2024-06-14 12:09:51,742 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 67 transitions, 377 flow [2024-06-14 12:09:51,742 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) [2024-06-14 12:09:51,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:51,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:09:51,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 12:09:51,742 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)] === [2024-06-14 12:09:51,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:51,743 INFO L85 PathProgramCache]: Analyzing trace with hash -767070121, now seen corresponding path program 1 times [2024-06-14 12:09:51,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:51,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078383249] [2024-06-14 12:09:51,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:51,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:51,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:52,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:52,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:52,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078383249] [2024-06-14 12:09:52,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078383249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:52,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:52,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:09:52,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411548132] [2024-06-14 12:09:52,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:52,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:09:52,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:52,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:09:52,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:09:52,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:09:52,795 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) [2024-06-14 12:09:52,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:52,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:09:52,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:53,375 INFO L124 PetriNetUnfolderBase]: 2201/3426 cut-off events. [2024-06-14 12:09:53,377 INFO L125 PetriNetUnfolderBase]: For 13918/13938 co-relation queries the response was YES. [2024-06-14 12:09:53,386 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. [2024-06-14 12:09:53,400 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 68 selfloop transitions, 16 changer transitions 0/93 dead transitions. [2024-06-14 12:09:53,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 93 transitions, 675 flow [2024-06-14 12:09:53,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:09:53,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:09:53,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-14 12:09:53,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2024-06-14 12:09:53,402 INFO L175 Difference]: Start difference. First operand has 64 places, 67 transitions, 377 flow. Second operand 6 states and 123 transitions. [2024-06-14 12:09:53,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 93 transitions, 675 flow [2024-06-14 12:09:53,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 93 transitions, 657 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-14 12:09:53,410 INFO L231 Difference]: Finished difference. Result has 69 places, 73 transitions, 457 flow [2024-06-14 12:09:53,411 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} [2024-06-14 12:09:53,413 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 24 predicate places. [2024-06-14 12:09:53,413 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 73 transitions, 457 flow [2024-06-14 12:09:53,414 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) [2024-06-14 12:09:53,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:53,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:09:53,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 12:09:53,414 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)] === [2024-06-14 12:09:53,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:53,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1931341978, now seen corresponding path program 1 times [2024-06-14 12:09:53,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:53,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708568076] [2024-06-14 12:09:53,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:53,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:53,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:55,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:55,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:55,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708568076] [2024-06-14 12:09:55,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708568076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:55,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:55,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:09:55,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499951142] [2024-06-14 12:09:55,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:55,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:09:55,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:55,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:09:55,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:09:55,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:09:55,693 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) [2024-06-14 12:09:55,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:55,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:09:55,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:56,434 INFO L124 PetriNetUnfolderBase]: 2305/3505 cut-off events. [2024-06-14 12:09:56,434 INFO L125 PetriNetUnfolderBase]: For 17078/17092 co-relation queries the response was YES. [2024-06-14 12:09:56,445 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. [2024-06-14 12:09:56,461 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 93 selfloop transitions, 21 changer transitions 0/121 dead transitions. [2024-06-14 12:09:56,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 121 transitions, 825 flow [2024-06-14 12:09:56,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:09:56,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:09:56,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-14 12:09:56,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797979797979798 [2024-06-14 12:09:56,463 INFO L175 Difference]: Start difference. First operand has 69 places, 73 transitions, 457 flow. Second operand 9 states and 190 transitions. [2024-06-14 12:09:56,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 121 transitions, 825 flow [2024-06-14 12:09:56,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 121 transitions, 795 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-14 12:09:56,477 INFO L231 Difference]: Finished difference. Result has 75 places, 74 transitions, 500 flow [2024-06-14 12:09:56,477 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} [2024-06-14 12:09:56,478 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 30 predicate places. [2024-06-14 12:09:56,478 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 74 transitions, 500 flow [2024-06-14 12:09:56,478 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) [2024-06-14 12:09:56,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:56,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:09:56,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 12:09:56,479 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)] === [2024-06-14 12:09:56,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:56,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1865174441, now seen corresponding path program 2 times [2024-06-14 12:09:56,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:56,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637162532] [2024-06-14 12:09:56,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:56,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:56,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:57,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:57,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:57,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637162532] [2024-06-14 12:09:57,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637162532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:57,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:57,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:09:57,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219768241] [2024-06-14 12:09:57,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:57,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:09:57,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:57,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:09:57,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:09:57,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:09:57,427 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) [2024-06-14 12:09:57,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:57,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:09:57,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:57,965 INFO L124 PetriNetUnfolderBase]: 2199/3397 cut-off events. [2024-06-14 12:09:57,965 INFO L125 PetriNetUnfolderBase]: For 20682/20696 co-relation queries the response was YES. [2024-06-14 12:09:57,972 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. [2024-06-14 12:09:57,987 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 69 selfloop transitions, 11 changer transitions 0/89 dead transitions. [2024-06-14 12:09:57,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 89 transitions, 698 flow [2024-06-14 12:09:57,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:09:57,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:09:57,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-14 12:09:57,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4356060606060606 [2024-06-14 12:09:57,989 INFO L175 Difference]: Start difference. First operand has 75 places, 74 transitions, 500 flow. Second operand 6 states and 115 transitions. [2024-06-14 12:09:57,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 89 transitions, 698 flow [2024-06-14 12:09:58,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 89 transitions, 617 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-14 12:09:58,002 INFO L231 Difference]: Finished difference. Result has 74 places, 74 transitions, 449 flow [2024-06-14 12:09:58,003 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} [2024-06-14 12:09:58,004 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 29 predicate places. [2024-06-14 12:09:58,004 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 74 transitions, 449 flow [2024-06-14 12:09:58,005 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) [2024-06-14 12:09:58,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:58,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:09:58,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 12:09:58,005 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)] === [2024-06-14 12:09:58,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:58,006 INFO L85 PathProgramCache]: Analyzing trace with hash 2072781109, now seen corresponding path program 1 times [2024-06-14 12:09:58,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:58,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291103953] [2024-06-14 12:09:58,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:58,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:58,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:59,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:59,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:59,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291103953] [2024-06-14 12:09:59,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291103953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:59,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:59,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:09:59,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021072038] [2024-06-14 12:09:59,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:59,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:09:59,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:59,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:09:59,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:09:59,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:09:59,214 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) [2024-06-14 12:09:59,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:59,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:09:59,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:59,718 INFO L124 PetriNetUnfolderBase]: 2313/3517 cut-off events. [2024-06-14 12:09:59,718 INFO L125 PetriNetUnfolderBase]: For 23823/23843 co-relation queries the response was YES. [2024-06-14 12:09:59,725 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. [2024-06-14 12:09:59,741 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 76 selfloop transitions, 24 changer transitions 0/107 dead transitions. [2024-06-14 12:09:59,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 107 transitions, 821 flow [2024-06-14 12:09:59,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:09:59,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:09:59,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-14 12:09:59,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4448051948051948 [2024-06-14 12:09:59,742 INFO L175 Difference]: Start difference. First operand has 74 places, 74 transitions, 449 flow. Second operand 7 states and 137 transitions. [2024-06-14 12:09:59,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 107 transitions, 821 flow [2024-06-14 12:09:59,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 107 transitions, 791 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-14 12:09:59,758 INFO L231 Difference]: Finished difference. Result has 76 places, 80 transitions, 545 flow [2024-06-14 12:09:59,758 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} [2024-06-14 12:09:59,759 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 31 predicate places. [2024-06-14 12:09:59,759 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 80 transitions, 545 flow [2024-06-14 12:09:59,759 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) [2024-06-14 12:09:59,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:59,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:09:59,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 12:09:59,760 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)] === [2024-06-14 12:09:59,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:59,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1990631511, now seen corresponding path program 2 times [2024-06-14 12:09:59,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:59,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206987332] [2024-06-14 12:09:59,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:59,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:59,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:00,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:00,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:00,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206987332] [2024-06-14 12:10:00,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206987332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:00,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:00,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:10:00,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049997739] [2024-06-14 12:10:00,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:00,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:10:00,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:00,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:10:00,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:10:00,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:10:00,855 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) [2024-06-14 12:10:00,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:00,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:10:00,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:01,353 INFO L124 PetriNetUnfolderBase]: 2324/3533 cut-off events. [2024-06-14 12:10:01,353 INFO L125 PetriNetUnfolderBase]: For 28403/28423 co-relation queries the response was YES. [2024-06-14 12:10:01,359 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. [2024-06-14 12:10:01,372 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 74 selfloop transitions, 26 changer transitions 0/107 dead transitions. [2024-06-14 12:10:01,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 107 transitions, 887 flow [2024-06-14 12:10:01,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:10:01,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:10:01,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-14 12:10:01,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4383116883116883 [2024-06-14 12:10:01,375 INFO L175 Difference]: Start difference. First operand has 76 places, 80 transitions, 545 flow. Second operand 7 states and 135 transitions. [2024-06-14 12:10:01,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 107 transitions, 887 flow [2024-06-14 12:10:01,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 107 transitions, 831 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-14 12:10:01,398 INFO L231 Difference]: Finished difference. Result has 80 places, 83 transitions, 587 flow [2024-06-14 12:10:01,398 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} [2024-06-14 12:10:01,399 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 35 predicate places. [2024-06-14 12:10:01,399 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 83 transitions, 587 flow [2024-06-14 12:10:01,399 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) [2024-06-14 12:10:01,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:01,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:01,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 12:10:01,400 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)] === [2024-06-14 12:10:01,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:01,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1990631759, now seen corresponding path program 1 times [2024-06-14 12:10:01,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:01,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865827679] [2024-06-14 12:10:01,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:01,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:01,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:02,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:02,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:02,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865827679] [2024-06-14 12:10:02,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865827679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:02,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:02,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:10:02,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632131276] [2024-06-14 12:10:02,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:02,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:10:02,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:02,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:10:02,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:10:02,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:10:02,588 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) [2024-06-14 12:10:02,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:02,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:10:02,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:03,193 INFO L124 PetriNetUnfolderBase]: 2559/3822 cut-off events. [2024-06-14 12:10:03,193 INFO L125 PetriNetUnfolderBase]: For 37389/37395 co-relation queries the response was YES. [2024-06-14 12:10:03,203 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. [2024-06-14 12:10:03,219 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 96 selfloop transitions, 28 changer transitions 0/132 dead transitions. [2024-06-14 12:10:03,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 132 transitions, 1155 flow [2024-06-14 12:10:03,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:10:03,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:10:03,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-14 12:10:03,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4707792207792208 [2024-06-14 12:10:03,222 INFO L175 Difference]: Start difference. First operand has 80 places, 83 transitions, 587 flow. Second operand 7 states and 145 transitions. [2024-06-14 12:10:03,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 132 transitions, 1155 flow [2024-06-14 12:10:03,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 132 transitions, 1099 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 12:10:03,253 INFO L231 Difference]: Finished difference. Result has 86 places, 100 transitions, 766 flow [2024-06-14 12:10:03,253 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} [2024-06-14 12:10:03,254 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 41 predicate places. [2024-06-14 12:10:03,254 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 100 transitions, 766 flow [2024-06-14 12:10:03,254 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) [2024-06-14 12:10:03,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:03,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:03,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 12:10:03,255 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)] === [2024-06-14 12:10:03,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:03,255 INFO L85 PathProgramCache]: Analyzing trace with hash -657745035, now seen corresponding path program 3 times [2024-06-14 12:10:03,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:03,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724296235] [2024-06-14 12:10:03,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:03,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:03,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:04,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:04,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:04,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724296235] [2024-06-14 12:10:04,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724296235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:04,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:04,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:10:04,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599310495] [2024-06-14 12:10:04,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:04,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:10:04,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:04,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:10:04,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:10:04,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:10:04,383 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) [2024-06-14 12:10:04,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:04,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:10:04,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:04,973 INFO L124 PetriNetUnfolderBase]: 2433/3674 cut-off events. [2024-06-14 12:10:04,973 INFO L125 PetriNetUnfolderBase]: For 39618/39666 co-relation queries the response was YES. [2024-06-14 12:10:04,987 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. [2024-06-14 12:10:04,998 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 93 selfloop transitions, 14 changer transitions 0/119 dead transitions. [2024-06-14 12:10:04,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 119 transitions, 1028 flow [2024-06-14 12:10:04,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:10:04,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:10:04,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-14 12:10:04,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-14 12:10:04,999 INFO L175 Difference]: Start difference. First operand has 86 places, 100 transitions, 766 flow. Second operand 7 states and 126 transitions. [2024-06-14 12:10:04,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 119 transitions, 1028 flow [2024-06-14 12:10:05,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 119 transitions, 970 flow, removed 28 selfloop flow, removed 1 redundant places. [2024-06-14 12:10:05,031 INFO L231 Difference]: Finished difference. Result has 92 places, 100 transitions, 744 flow [2024-06-14 12:10:05,031 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} [2024-06-14 12:10:05,031 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 47 predicate places. [2024-06-14 12:10:05,031 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 100 transitions, 744 flow [2024-06-14 12:10:05,032 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) [2024-06-14 12:10:05,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:05,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:05,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 12:10:05,032 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)] === [2024-06-14 12:10:05,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:05,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1985534419, now seen corresponding path program 2 times [2024-06-14 12:10:05,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:05,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607880114] [2024-06-14 12:10:05,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:05,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:05,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:05,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:05,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:05,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607880114] [2024-06-14 12:10:05,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607880114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:05,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:05,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:10:05,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551701663] [2024-06-14 12:10:05,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:05,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:10:05,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:05,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:10:05,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:10:05,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:10:05,984 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) [2024-06-14 12:10:05,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:05,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:10:05,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:06,768 INFO L124 PetriNetUnfolderBase]: 2590/3866 cut-off events. [2024-06-14 12:10:06,769 INFO L125 PetriNetUnfolderBase]: For 50139/50139 co-relation queries the response was YES. [2024-06-14 12:10:06,777 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. [2024-06-14 12:10:06,788 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 99 selfloop transitions, 21 changer transitions 0/128 dead transitions. [2024-06-14 12:10:06,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 128 transitions, 1150 flow [2024-06-14 12:10:06,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:10:06,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:10:06,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-14 12:10:06,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43506493506493504 [2024-06-14 12:10:06,790 INFO L175 Difference]: Start difference. First operand has 92 places, 100 transitions, 744 flow. Second operand 7 states and 134 transitions. [2024-06-14 12:10:06,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 128 transitions, 1150 flow [2024-06-14 12:10:06,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 128 transitions, 1098 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 12:10:06,813 INFO L231 Difference]: Finished difference. Result has 93 places, 106 transitions, 813 flow [2024-06-14 12:10:06,813 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} [2024-06-14 12:10:06,813 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 48 predicate places. [2024-06-14 12:10:06,813 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 106 transitions, 813 flow [2024-06-14 12:10:06,814 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) [2024-06-14 12:10:06,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:06,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:06,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 12:10:06,814 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)] === [2024-06-14 12:10:06,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:06,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1128740497, now seen corresponding path program 3 times [2024-06-14 12:10:06,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:06,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277870117] [2024-06-14 12:10:06,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:06,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:06,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:07,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:07,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:07,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277870117] [2024-06-14 12:10:07,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277870117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:07,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:07,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:10:07,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092659850] [2024-06-14 12:10:07,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:07,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:10:07,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:07,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:10:07,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:10:07,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:10:07,802 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) [2024-06-14 12:10:07,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:07,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:10:07,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:08,402 INFO L124 PetriNetUnfolderBase]: 2596/3874 cut-off events. [2024-06-14 12:10:08,402 INFO L125 PetriNetUnfolderBase]: For 55829/55829 co-relation queries the response was YES. [2024-06-14 12:10:08,413 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. [2024-06-14 12:10:08,427 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 102 selfloop transitions, 27 changer transitions 0/137 dead transitions. [2024-06-14 12:10:08,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 137 transitions, 1304 flow [2024-06-14 12:10:08,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:10:08,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:10:08,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-14 12:10:08,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4448051948051948 [2024-06-14 12:10:08,429 INFO L175 Difference]: Start difference. First operand has 93 places, 106 transitions, 813 flow. Second operand 7 states and 137 transitions. [2024-06-14 12:10:08,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 137 transitions, 1304 flow [2024-06-14 12:10:08,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 137 transitions, 1245 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-14 12:10:08,460 INFO L231 Difference]: Finished difference. Result has 97 places, 113 transitions, 920 flow [2024-06-14 12:10:08,461 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} [2024-06-14 12:10:08,461 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 52 predicate places. [2024-06-14 12:10:08,461 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 113 transitions, 920 flow [2024-06-14 12:10:08,462 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) [2024-06-14 12:10:08,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:08,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:08,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 12:10:08,462 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)] === [2024-06-14 12:10:08,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:08,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1985523507, now seen corresponding path program 1 times [2024-06-14 12:10:08,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:08,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062406194] [2024-06-14 12:10:08,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:08,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:08,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:09,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:09,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:09,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062406194] [2024-06-14 12:10:09,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062406194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:09,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:09,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:10:09,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057654802] [2024-06-14 12:10:09,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:09,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:10:09,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:09,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:10:09,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:10:09,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:10:09,702 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) [2024-06-14 12:10:09,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:09,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:10:09,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:10,406 INFO L124 PetriNetUnfolderBase]: 2598/3878 cut-off events. [2024-06-14 12:10:10,406 INFO L125 PetriNetUnfolderBase]: For 62682/62682 co-relation queries the response was YES. [2024-06-14 12:10:10,416 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. [2024-06-14 12:10:10,427 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 105 selfloop transitions, 25 changer transitions 0/138 dead transitions. [2024-06-14 12:10:10,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 138 transitions, 1340 flow [2024-06-14 12:10:10,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:10:10,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:10:10,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-14 12:10:10,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4383116883116883 [2024-06-14 12:10:10,429 INFO L175 Difference]: Start difference. First operand has 97 places, 113 transitions, 920 flow. Second operand 7 states and 135 transitions. [2024-06-14 12:10:10,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 138 transitions, 1340 flow [2024-06-14 12:10:10,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 138 transitions, 1285 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-14 12:10:10,459 INFO L231 Difference]: Finished difference. Result has 101 places, 116 transitions, 971 flow [2024-06-14 12:10:10,459 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} [2024-06-14 12:10:10,460 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 56 predicate places. [2024-06-14 12:10:10,460 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 116 transitions, 971 flow [2024-06-14 12:10:10,460 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) [2024-06-14 12:10:10,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:10,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:10,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 12:10:10,460 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)] === [2024-06-14 12:10:10,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:10,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1120993648, now seen corresponding path program 1 times [2024-06-14 12:10:10,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:10,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063270908] [2024-06-14 12:10:10,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:10,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:10,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:11,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:11,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:11,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063270908] [2024-06-14 12:10:11,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063270908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:11,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:11,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:10:11,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840806229] [2024-06-14 12:10:11,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:11,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:10:11,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:11,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:10:11,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:10:11,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:10:11,244 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) [2024-06-14 12:10:11,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:11,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:10:11,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:11,881 INFO L124 PetriNetUnfolderBase]: 2453/3732 cut-off events. [2024-06-14 12:10:11,881 INFO L125 PetriNetUnfolderBase]: For 67423/67423 co-relation queries the response was YES. [2024-06-14 12:10:11,893 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. [2024-06-14 12:10:11,904 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 106 selfloop transitions, 8 changer transitions 0/124 dead transitions. [2024-06-14 12:10:11,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 124 transitions, 1219 flow [2024-06-14 12:10:11,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:10:11,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:10:11,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 94 transitions. [2024-06-14 12:10:11,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42727272727272725 [2024-06-14 12:10:11,906 INFO L175 Difference]: Start difference. First operand has 101 places, 116 transitions, 971 flow. Second operand 5 states and 94 transitions. [2024-06-14 12:10:11,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 124 transitions, 1219 flow [2024-06-14 12:10:11,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 124 transitions, 1127 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-14 12:10:11,952 INFO L231 Difference]: Finished difference. Result has 101 places, 116 transitions, 901 flow [2024-06-14 12:10:11,952 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} [2024-06-14 12:10:11,952 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 56 predicate places. [2024-06-14 12:10:11,953 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 116 transitions, 901 flow [2024-06-14 12:10:11,953 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) [2024-06-14 12:10:11,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:11,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:11,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 12:10:11,953 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)] === [2024-06-14 12:10:11,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:11,954 INFO L85 PathProgramCache]: Analyzing trace with hash -168443274, now seen corresponding path program 1 times [2024-06-14 12:10:11,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:11,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958275544] [2024-06-14 12:10:11,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:11,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:11,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:12,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:12,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:12,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958275544] [2024-06-14 12:10:12,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958275544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:12,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:12,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:10:12,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246327086] [2024-06-14 12:10:12,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:12,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:10:12,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:12,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:10:12,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:10:13,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:10:13,142 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) [2024-06-14 12:10:13,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:13,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:10:13,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:13,698 INFO L124 PetriNetUnfolderBase]: 2494/3763 cut-off events. [2024-06-14 12:10:13,698 INFO L125 PetriNetUnfolderBase]: For 71549/71584 co-relation queries the response was YES. [2024-06-14 12:10:13,710 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. [2024-06-14 12:10:13,724 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 105 selfloop transitions, 35 changer transitions 0/156 dead transitions. [2024-06-14 12:10:13,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 156 transitions, 1433 flow [2024-06-14 12:10:13,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:10:13,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:10:13,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-14 12:10:13,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460227272727273 [2024-06-14 12:10:13,726 INFO L175 Difference]: Start difference. First operand has 101 places, 116 transitions, 901 flow. Second operand 8 states and 157 transitions. [2024-06-14 12:10:13,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 156 transitions, 1433 flow [2024-06-14 12:10:13,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 156 transitions, 1411 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-14 12:10:13,820 INFO L231 Difference]: Finished difference. Result has 105 places, 122 transitions, 1059 flow [2024-06-14 12:10:13,821 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} [2024-06-14 12:10:13,821 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 60 predicate places. [2024-06-14 12:10:13,821 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 122 transitions, 1059 flow [2024-06-14 12:10:13,821 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) [2024-06-14 12:10:13,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:13,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:13,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 12:10:13,822 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)] === [2024-06-14 12:10:13,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:13,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1574472241, now seen corresponding path program 1 times [2024-06-14 12:10:13,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:13,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662872706] [2024-06-14 12:10:13,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:13,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:13,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:14,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:14,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:14,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662872706] [2024-06-14 12:10:14,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662872706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:14,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:14,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:10:14,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353367325] [2024-06-14 12:10:14,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:14,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:10:14,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:14,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:10:14,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:10:14,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:10:14,979 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) [2024-06-14 12:10:14,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:14,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:10:14,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:15,621 INFO L124 PetriNetUnfolderBase]: 2803/4123 cut-off events. [2024-06-14 12:10:15,621 INFO L125 PetriNetUnfolderBase]: For 84019/84028 co-relation queries the response was YES. [2024-06-14 12:10:15,634 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. [2024-06-14 12:10:15,649 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 121 selfloop transitions, 50 changer transitions 0/174 dead transitions. [2024-06-14 12:10:15,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 174 transitions, 1863 flow [2024-06-14 12:10:15,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:10:15,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:10:15,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-14 12:10:15,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4602272727272727 [2024-06-14 12:10:15,650 INFO L175 Difference]: Start difference. First operand has 105 places, 122 transitions, 1059 flow. Second operand 8 states and 162 transitions. [2024-06-14 12:10:15,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 174 transitions, 1863 flow [2024-06-14 12:10:15,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 174 transitions, 1773 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-14 12:10:15,699 INFO L231 Difference]: Finished difference. Result has 111 places, 134 transitions, 1243 flow [2024-06-14 12:10:15,699 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} [2024-06-14 12:10:15,699 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 66 predicate places. [2024-06-14 12:10:15,700 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 134 transitions, 1243 flow [2024-06-14 12:10:15,700 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) [2024-06-14 12:10:15,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:15,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:15,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 12:10:15,700 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)] === [2024-06-14 12:10:15,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:15,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1688103414, now seen corresponding path program 2 times [2024-06-14 12:10:15,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:15,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183371657] [2024-06-14 12:10:15,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:15,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:15,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:16,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:16,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:16,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183371657] [2024-06-14 12:10:16,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183371657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:16,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:16,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:10:16,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50474653] [2024-06-14 12:10:16,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:16,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:10:16,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:16,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:10:16,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:10:16,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:10:16,876 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) [2024-06-14 12:10:16,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:16,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:10:16,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:17,499 INFO L124 PetriNetUnfolderBase]: 2615/3924 cut-off events. [2024-06-14 12:10:17,499 INFO L125 PetriNetUnfolderBase]: For 92682/92725 co-relation queries the response was YES. [2024-06-14 12:10:17,514 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. [2024-06-14 12:10:17,529 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 113 selfloop transitions, 36 changer transitions 0/168 dead transitions. [2024-06-14 12:10:17,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 168 transitions, 1737 flow [2024-06-14 12:10:17,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:10:17,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:10:17,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-14 12:10:17,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-14 12:10:17,530 INFO L175 Difference]: Start difference. First operand has 111 places, 134 transitions, 1243 flow. Second operand 8 states and 155 transitions. [2024-06-14 12:10:17,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 168 transitions, 1737 flow [2024-06-14 12:10:17,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 168 transitions, 1627 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-14 12:10:17,602 INFO L231 Difference]: Finished difference. Result has 116 places, 137 transitions, 1253 flow [2024-06-14 12:10:17,602 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} [2024-06-14 12:10:17,603 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 71 predicate places. [2024-06-14 12:10:17,603 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 137 transitions, 1253 flow [2024-06-14 12:10:17,603 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) [2024-06-14 12:10:17,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:17,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:17,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 12:10:17,603 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)] === [2024-06-14 12:10:17,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:17,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1580036431, now seen corresponding path program 2 times [2024-06-14 12:10:17,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:17,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598975545] [2024-06-14 12:10:17,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:17,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:17,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:18,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:18,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:18,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598975545] [2024-06-14 12:10:18,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598975545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:18,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:18,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:10:18,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680871509] [2024-06-14 12:10:18,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:18,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:10:18,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:18,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:10:18,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:10:18,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:10:18,785 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) [2024-06-14 12:10:18,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:18,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:10:18,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:19,497 INFO L124 PetriNetUnfolderBase]: 2906/4270 cut-off events. [2024-06-14 12:10:19,497 INFO L125 PetriNetUnfolderBase]: For 104522/104531 co-relation queries the response was YES. [2024-06-14 12:10:19,511 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. [2024-06-14 12:10:19,527 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 129 selfloop transitions, 52 changer transitions 0/184 dead transitions. [2024-06-14 12:10:19,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 184 transitions, 2137 flow [2024-06-14 12:10:19,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:10:19,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:10:19,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-14 12:10:19,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45738636363636365 [2024-06-14 12:10:19,528 INFO L175 Difference]: Start difference. First operand has 116 places, 137 transitions, 1253 flow. Second operand 8 states and 161 transitions. [2024-06-14 12:10:19,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 184 transitions, 2137 flow [2024-06-14 12:10:19,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 184 transitions, 2056 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-14 12:10:19,599 INFO L231 Difference]: Finished difference. Result has 120 places, 145 transitions, 1394 flow [2024-06-14 12:10:19,599 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} [2024-06-14 12:10:19,599 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 75 predicate places. [2024-06-14 12:10:19,600 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 145 transitions, 1394 flow [2024-06-14 12:10:19,600 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) [2024-06-14 12:10:19,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:19,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:19,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 12:10:19,600 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)] === [2024-06-14 12:10:19,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:19,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1580036214, now seen corresponding path program 3 times [2024-06-14 12:10:19,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:19,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225510444] [2024-06-14 12:10:19,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:19,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:19,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:20,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:20,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:20,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225510444] [2024-06-14 12:10:20,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225510444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:20,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:20,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:10:20,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465746104] [2024-06-14 12:10:20,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:20,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:10:20,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:20,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:10:20,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:10:20,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:10:20,740 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) [2024-06-14 12:10:20,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:20,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:10:20,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:21,440 INFO L124 PetriNetUnfolderBase]: 2715/4068 cut-off events. [2024-06-14 12:10:21,441 INFO L125 PetriNetUnfolderBase]: For 111944/111987 co-relation queries the response was YES. [2024-06-14 12:10:21,456 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. [2024-06-14 12:10:21,474 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 117 selfloop transitions, 38 changer transitions 0/176 dead transitions. [2024-06-14 12:10:21,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 176 transitions, 1903 flow [2024-06-14 12:10:21,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:10:21,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:10:21,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 12:10:21,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-14 12:10:21,476 INFO L175 Difference]: Start difference. First operand has 120 places, 145 transitions, 1394 flow. Second operand 8 states and 153 transitions. [2024-06-14 12:10:21,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 176 transitions, 1903 flow [2024-06-14 12:10:21,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 176 transitions, 1790 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-14 12:10:21,555 INFO L231 Difference]: Finished difference. Result has 124 places, 148 transitions, 1408 flow [2024-06-14 12:10:21,555 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} [2024-06-14 12:10:21,555 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 79 predicate places. [2024-06-14 12:10:21,556 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 148 transitions, 1408 flow [2024-06-14 12:10:21,556 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) [2024-06-14 12:10:21,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:21,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:21,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 12:10:21,556 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)] === [2024-06-14 12:10:21,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:21,556 INFO L85 PathProgramCache]: Analyzing trace with hash -162721697, now seen corresponding path program 3 times [2024-06-14 12:10:21,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:21,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709844961] [2024-06-14 12:10:21,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:21,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:21,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:22,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:22,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:22,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709844961] [2024-06-14 12:10:22,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709844961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:22,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:22,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:10:22,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411030485] [2024-06-14 12:10:22,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:22,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:10:22,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:22,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:10:22,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:10:22,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:10:22,643 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) [2024-06-14 12:10:22,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:22,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:10:22,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:23,328 INFO L124 PetriNetUnfolderBase]: 2921/4292 cut-off events. [2024-06-14 12:10:23,329 INFO L125 PetriNetUnfolderBase]: For 121666/121675 co-relation queries the response was YES. [2024-06-14 12:10:23,345 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. [2024-06-14 12:10:23,362 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 125 selfloop transitions, 60 changer transitions 0/188 dead transitions. [2024-06-14 12:10:23,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 188 transitions, 2169 flow [2024-06-14 12:10:23,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:10:23,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:10:23,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-14 12:10:23,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-14 12:10:23,363 INFO L175 Difference]: Start difference. First operand has 124 places, 148 transitions, 1408 flow. Second operand 8 states and 159 transitions. [2024-06-14 12:10:23,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 188 transitions, 2169 flow [2024-06-14 12:10:23,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 188 transitions, 2085 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-14 12:10:23,442 INFO L231 Difference]: Finished difference. Result has 127 places, 152 transitions, 1518 flow [2024-06-14 12:10:23,442 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} [2024-06-14 12:10:23,443 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 82 predicate places. [2024-06-14 12:10:23,443 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 152 transitions, 1518 flow [2024-06-14 12:10:23,443 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) [2024-06-14 12:10:23,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:23,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:23,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 12:10:23,444 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)] === [2024-06-14 12:10:23,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:23,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1093946339, now seen corresponding path program 4 times [2024-06-14 12:10:23,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:23,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817208256] [2024-06-14 12:10:23,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:23,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:23,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:24,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:24,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:24,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817208256] [2024-06-14 12:10:24,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817208256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:24,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:24,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:10:24,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262110445] [2024-06-14 12:10:24,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:24,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:10:24,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:24,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:10:24,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:10:24,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:10:24,359 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) [2024-06-14 12:10:24,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:24,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:10:24,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:25,104 INFO L124 PetriNetUnfolderBase]: 2957/4343 cut-off events. [2024-06-14 12:10:25,104 INFO L125 PetriNetUnfolderBase]: For 132649/132649 co-relation queries the response was YES. [2024-06-14 12:10:25,120 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. [2024-06-14 12:10:25,137 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 154 selfloop transitions, 25 changer transitions 0/182 dead transitions. [2024-06-14 12:10:25,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 182 transitions, 2060 flow [2024-06-14 12:10:25,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:10:25,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:10:25,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 12:10:25,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-14 12:10:25,138 INFO L175 Difference]: Start difference. First operand has 127 places, 152 transitions, 1518 flow. Second operand 8 states and 144 transitions. [2024-06-14 12:10:25,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 182 transitions, 2060 flow [2024-06-14 12:10:25,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 182 transitions, 1923 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-14 12:10:25,233 INFO L231 Difference]: Finished difference. Result has 130 places, 156 transitions, 1516 flow [2024-06-14 12:10:25,233 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} [2024-06-14 12:10:25,234 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 85 predicate places. [2024-06-14 12:10:25,234 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 156 transitions, 1516 flow [2024-06-14 12:10:25,234 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) [2024-06-14 12:10:25,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:25,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:25,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 12:10:25,234 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)] === [2024-06-14 12:10:25,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:25,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1431227569, now seen corresponding path program 5 times [2024-06-14 12:10:25,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:25,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863740819] [2024-06-14 12:10:25,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:25,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:25,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:26,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:26,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:26,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863740819] [2024-06-14 12:10:26,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863740819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:26,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:26,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:10:26,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852310410] [2024-06-14 12:10:26,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:26,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:10:26,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:26,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:10:26,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:10:26,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:10:26,223 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) [2024-06-14 12:10:26,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:26,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:10:26,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:26,865 INFO L124 PetriNetUnfolderBase]: 2993/4395 cut-off events. [2024-06-14 12:10:26,865 INFO L125 PetriNetUnfolderBase]: For 142276/142276 co-relation queries the response was YES. [2024-06-14 12:10:26,883 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. [2024-06-14 12:10:26,900 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 154 selfloop transitions, 37 changer transitions 0/194 dead transitions. [2024-06-14 12:10:26,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 194 transitions, 2326 flow [2024-06-14 12:10:26,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:10:26,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:10:26,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 12:10:26,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-14 12:10:26,901 INFO L175 Difference]: Start difference. First operand has 130 places, 156 transitions, 1516 flow. Second operand 8 states and 150 transitions. [2024-06-14 12:10:26,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 194 transitions, 2326 flow [2024-06-14 12:10:27,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 194 transitions, 2237 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-14 12:10:27,009 INFO L231 Difference]: Finished difference. Result has 133 places, 163 transitions, 1645 flow [2024-06-14 12:10:27,009 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} [2024-06-14 12:10:27,010 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 88 predicate places. [2024-06-14 12:10:27,010 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 163 transitions, 1645 flow [2024-06-14 12:10:27,010 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) [2024-06-14 12:10:27,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:27,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:27,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 12:10:27,010 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)] === [2024-06-14 12:10:27,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:27,011 INFO L85 PathProgramCache]: Analyzing trace with hash -631223210, now seen corresponding path program 4 times [2024-06-14 12:10:27,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:27,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297337310] [2024-06-14 12:10:27,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:27,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:27,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:27,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:27,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:27,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297337310] [2024-06-14 12:10:27,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297337310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:27,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:27,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:10:27,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447824323] [2024-06-14 12:10:27,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:27,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:10:27,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:27,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:10:27,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:10:28,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:10:28,011 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) [2024-06-14 12:10:28,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:28,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:10:28,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:28,665 INFO L124 PetriNetUnfolderBase]: 2783/4167 cut-off events. [2024-06-14 12:10:28,665 INFO L125 PetriNetUnfolderBase]: For 149326/149360 co-relation queries the response was YES. [2024-06-14 12:10:28,684 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. [2024-06-14 12:10:28,702 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 144 selfloop transitions, 17 changer transitions 0/186 dead transitions. [2024-06-14 12:10:28,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 186 transitions, 2025 flow [2024-06-14 12:10:28,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:10:28,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:10:28,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 12:10:28,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4034090909090909 [2024-06-14 12:10:28,703 INFO L175 Difference]: Start difference. First operand has 133 places, 163 transitions, 1645 flow. Second operand 8 states and 142 transitions. [2024-06-14 12:10:28,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 186 transitions, 2025 flow [2024-06-14 12:10:28,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 186 transitions, 1911 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-14 12:10:28,813 INFO L231 Difference]: Finished difference. Result has 137 places, 163 transitions, 1573 flow [2024-06-14 12:10:28,814 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} [2024-06-14 12:10:28,814 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 92 predicate places. [2024-06-14 12:10:28,814 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 163 transitions, 1573 flow [2024-06-14 12:10:28,814 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) [2024-06-14 12:10:28,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:28,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:28,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 12:10:28,815 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)] === [2024-06-14 12:10:28,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:28,815 INFO L85 PathProgramCache]: Analyzing trace with hash -621692074, now seen corresponding path program 1 times [2024-06-14 12:10:28,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:28,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186379905] [2024-06-14 12:10:28,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:28,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:28,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:29,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:29,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:29,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186379905] [2024-06-14 12:10:29,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186379905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:29,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:29,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:10:29,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259157781] [2024-06-14 12:10:29,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:29,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:10:29,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:29,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:10:29,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:10:29,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:10:29,823 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) [2024-06-14 12:10:29,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:29,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:10:29,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:30,678 INFO L124 PetriNetUnfolderBase]: 2862/4263 cut-off events. [2024-06-14 12:10:30,679 INFO L125 PetriNetUnfolderBase]: For 159552/159552 co-relation queries the response was YES. [2024-06-14 12:10:30,693 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. [2024-06-14 12:10:30,707 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 141 selfloop transitions, 30 changer transitions 0/188 dead transitions. [2024-06-14 12:10:30,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 188 transitions, 2091 flow [2024-06-14 12:10:30,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:10:30,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:10:30,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-14 12:10:30,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4383116883116883 [2024-06-14 12:10:30,708 INFO L175 Difference]: Start difference. First operand has 137 places, 163 transitions, 1573 flow. Second operand 7 states and 135 transitions. [2024-06-14 12:10:30,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 188 transitions, 2091 flow [2024-06-14 12:10:30,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 188 transitions, 2003 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-14 12:10:30,803 INFO L231 Difference]: Finished difference. Result has 134 places, 167 transitions, 1635 flow [2024-06-14 12:10:30,803 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} [2024-06-14 12:10:30,803 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 89 predicate places. [2024-06-14 12:10:30,803 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 167 transitions, 1635 flow [2024-06-14 12:10:30,803 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) [2024-06-14 12:10:30,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:30,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:30,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 12:10:30,804 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)] === [2024-06-14 12:10:30,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:30,804 INFO L85 PathProgramCache]: Analyzing trace with hash -631215553, now seen corresponding path program 6 times [2024-06-14 12:10:30,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:30,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126624228] [2024-06-14 12:10:30,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:30,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:30,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:31,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:31,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:31,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126624228] [2024-06-14 12:10:31,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126624228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:31,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:31,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:10:31,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648641682] [2024-06-14 12:10:31,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:31,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:10:31,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:31,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:10:31,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:10:31,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:10:31,773 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) [2024-06-14 12:10:31,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:31,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:10:31,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:32,503 INFO L124 PetriNetUnfolderBase]: 2994/4397 cut-off events. [2024-06-14 12:10:32,503 INFO L125 PetriNetUnfolderBase]: For 169700/169700 co-relation queries the response was YES. [2024-06-14 12:10:32,518 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. [2024-06-14 12:10:32,533 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 155 selfloop transitions, 41 changer transitions 0/199 dead transitions. [2024-06-14 12:10:32,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 199 transitions, 2296 flow [2024-06-14 12:10:32,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:10:32,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:10:32,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-14 12:10:32,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42329545454545453 [2024-06-14 12:10:32,535 INFO L175 Difference]: Start difference. First operand has 134 places, 167 transitions, 1635 flow. Second operand 8 states and 149 transitions. [2024-06-14 12:10:32,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 199 transitions, 2296 flow [2024-06-14 12:10:32,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 199 transitions, 2198 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-14 12:10:32,639 INFO L231 Difference]: Finished difference. Result has 137 places, 171 transitions, 1713 flow [2024-06-14 12:10:32,639 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} [2024-06-14 12:10:32,640 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 92 predicate places. [2024-06-14 12:10:32,640 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 171 transitions, 1713 flow [2024-06-14 12:10:32,641 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) [2024-06-14 12:10:32,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:32,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:32,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 12:10:32,641 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)] === [2024-06-14 12:10:32,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:32,641 INFO L85 PathProgramCache]: Analyzing trace with hash 391066010, now seen corresponding path program 1 times [2024-06-14 12:10:32,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:32,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522442847] [2024-06-14 12:10:32,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:32,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:32,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:33,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:33,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:33,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522442847] [2024-06-14 12:10:33,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522442847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:33,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:33,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:10:33,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857356547] [2024-06-14 12:10:33,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:33,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:10:33,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:33,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:10:33,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:10:33,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:10:33,436 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) [2024-06-14 12:10:33,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:33,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:10:33,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:34,226 INFO L124 PetriNetUnfolderBase]: 2743/4143 cut-off events. [2024-06-14 12:10:34,226 INFO L125 PetriNetUnfolderBase]: For 174389/174389 co-relation queries the response was YES. [2024-06-14 12:10:34,244 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. [2024-06-14 12:10:34,262 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 150 selfloop transitions, 11 changer transitions 0/185 dead transitions. [2024-06-14 12:10:34,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 185 transitions, 2093 flow [2024-06-14 12:10:34,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:10:34,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:10:34,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-14 12:10:34,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-14 12:10:34,263 INFO L175 Difference]: Start difference. First operand has 137 places, 171 transitions, 1713 flow. Second operand 6 states and 110 transitions. [2024-06-14 12:10:34,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 185 transitions, 2093 flow [2024-06-14 12:10:34,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 185 transitions, 1983 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-14 12:10:34,372 INFO L231 Difference]: Finished difference. Result has 138 places, 174 transitions, 1669 flow [2024-06-14 12:10:34,372 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} [2024-06-14 12:10:34,373 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 93 predicate places. [2024-06-14 12:10:34,373 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 174 transitions, 1669 flow [2024-06-14 12:10:34,373 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) [2024-06-14 12:10:34,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:34,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:34,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 12:10:34,373 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)] === [2024-06-14 12:10:34,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:34,374 INFO L85 PathProgramCache]: Analyzing trace with hash -926777300, now seen corresponding path program 1 times [2024-06-14 12:10:34,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:34,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570073720] [2024-06-14 12:10:34,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:34,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:34,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:35,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:35,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:35,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570073720] [2024-06-14 12:10:35,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570073720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:35,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:35,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:10:35,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346517848] [2024-06-14 12:10:35,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:35,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:10:35,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:35,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:10:35,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:10:35,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:10:35,591 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) [2024-06-14 12:10:35,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:35,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:10:35,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:36,408 INFO L124 PetriNetUnfolderBase]: 2784/4188 cut-off events. [2024-06-14 12:10:36,409 INFO L125 PetriNetUnfolderBase]: For 179565/179595 co-relation queries the response was YES. [2024-06-14 12:10:36,426 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. [2024-06-14 12:10:36,443 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 169 selfloop transitions, 20 changer transitions 0/216 dead transitions. [2024-06-14 12:10:36,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 216 transitions, 2219 flow [2024-06-14 12:10:36,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:10:36,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:10:36,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-14 12:10:36,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292929292929293 [2024-06-14 12:10:36,444 INFO L175 Difference]: Start difference. First operand has 138 places, 174 transitions, 1669 flow. Second operand 9 states and 170 transitions. [2024-06-14 12:10:36,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 216 transitions, 2219 flow [2024-06-14 12:10:36,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 216 transitions, 2173 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-14 12:10:36,544 INFO L231 Difference]: Finished difference. Result has 143 places, 177 transitions, 1749 flow [2024-06-14 12:10:36,544 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} [2024-06-14 12:10:36,545 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 98 predicate places. [2024-06-14 12:10:36,545 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 177 transitions, 1749 flow [2024-06-14 12:10:36,545 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) [2024-06-14 12:10:36,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:36,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:36,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 12:10:36,545 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)] === [2024-06-14 12:10:36,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:36,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1559352592, now seen corresponding path program 1 times [2024-06-14 12:10:36,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:36,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511201603] [2024-06-14 12:10:36,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:36,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:36,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:37,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:37,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:37,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511201603] [2024-06-14 12:10:37,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511201603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:37,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:37,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:10:37,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094736392] [2024-06-14 12:10:37,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:37,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:10:37,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:37,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:10:37,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:10:37,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:10:37,644 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) [2024-06-14 12:10:37,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:37,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:10:37,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:38,392 INFO L124 PetriNetUnfolderBase]: 3080/4521 cut-off events. [2024-06-14 12:10:38,392 INFO L125 PetriNetUnfolderBase]: For 200597/200606 co-relation queries the response was YES. [2024-06-14 12:10:38,411 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. [2024-06-14 12:10:38,430 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 151 selfloop transitions, 84 changer transitions 0/238 dead transitions. [2024-06-14 12:10:38,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 238 transitions, 2955 flow [2024-06-14 12:10:38,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:10:38,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:10:38,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-14 12:10:38,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4671717171717172 [2024-06-14 12:10:38,432 INFO L175 Difference]: Start difference. First operand has 143 places, 177 transitions, 1749 flow. Second operand 9 states and 185 transitions. [2024-06-14 12:10:38,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 238 transitions, 2955 flow [2024-06-14 12:10:38,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 238 transitions, 2853 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-14 12:10:38,570 INFO L231 Difference]: Finished difference. Result has 147 places, 189 transitions, 2041 flow [2024-06-14 12:10:38,571 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} [2024-06-14 12:10:38,571 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 102 predicate places. [2024-06-14 12:10:38,571 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 189 transitions, 2041 flow [2024-06-14 12:10:38,571 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) [2024-06-14 12:10:38,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:38,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:38,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 12:10:38,572 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)] === [2024-06-14 12:10:38,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:38,572 INFO L85 PathProgramCache]: Analyzing trace with hash -926772650, now seen corresponding path program 2 times [2024-06-14 12:10:38,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:38,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470459349] [2024-06-14 12:10:38,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:38,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:38,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:39,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:39,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:39,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470459349] [2024-06-14 12:10:39,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470459349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:39,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:39,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:10:39,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199939382] [2024-06-14 12:10:39,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:39,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:10:39,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:39,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:10:39,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:10:39,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:10:39,754 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) [2024-06-14 12:10:39,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:39,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:10:39,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:40,496 INFO L124 PetriNetUnfolderBase]: 2905/4350 cut-off events. [2024-06-14 12:10:40,497 INFO L125 PetriNetUnfolderBase]: For 213683/213724 co-relation queries the response was YES. [2024-06-14 12:10:40,518 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. [2024-06-14 12:10:40,539 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 154 selfloop transitions, 49 changer transitions 0/233 dead transitions. [2024-06-14 12:10:40,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 233 transitions, 2831 flow [2024-06-14 12:10:40,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:10:40,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:10:40,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-14 12:10:40,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44191919191919193 [2024-06-14 12:10:40,541 INFO L175 Difference]: Start difference. First operand has 147 places, 189 transitions, 2041 flow. Second operand 9 states and 175 transitions. [2024-06-14 12:10:40,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 233 transitions, 2831 flow [2024-06-14 12:10:40,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 233 transitions, 2639 flow, removed 56 selfloop flow, removed 4 redundant places. [2024-06-14 12:10:40,694 INFO L231 Difference]: Finished difference. Result has 152 places, 195 transitions, 2125 flow [2024-06-14 12:10:40,694 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} [2024-06-14 12:10:40,694 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 107 predicate places. [2024-06-14 12:10:40,695 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 195 transitions, 2125 flow [2024-06-14 12:10:40,695 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) [2024-06-14 12:10:40,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:40,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:40,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 12:10:40,695 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)] === [2024-06-14 12:10:40,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:40,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1730228002, now seen corresponding path program 2 times [2024-06-14 12:10:40,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:40,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365695997] [2024-06-14 12:10:40,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:40,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:40,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:41,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:41,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:41,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365695997] [2024-06-14 12:10:41,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365695997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:41,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:41,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:10:41,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212631831] [2024-06-14 12:10:41,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:41,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:10:41,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:41,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:10:41,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:10:41,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:10:41,913 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) [2024-06-14 12:10:41,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:41,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:10:41,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:42,704 INFO L124 PetriNetUnfolderBase]: 3183/4668 cut-off events. [2024-06-14 12:10:42,705 INFO L125 PetriNetUnfolderBase]: For 237768/237777 co-relation queries the response was YES. [2024-06-14 12:10:42,723 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. [2024-06-14 12:10:42,740 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 167 selfloop transitions, 81 changer transitions 0/251 dead transitions. [2024-06-14 12:10:42,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 251 transitions, 3451 flow [2024-06-14 12:10:42,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:10:42,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:10:42,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-14 12:10:42,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46464646464646464 [2024-06-14 12:10:42,742 INFO L175 Difference]: Start difference. First operand has 152 places, 195 transitions, 2125 flow. Second operand 9 states and 184 transitions. [2024-06-14 12:10:42,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 251 transitions, 3451 flow [2024-06-14 12:10:42,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 251 transitions, 3313 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-14 12:10:42,924 INFO L231 Difference]: Finished difference. Result has 157 places, 203 transitions, 2299 flow [2024-06-14 12:10:42,924 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} [2024-06-14 12:10:42,924 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 112 predicate places. [2024-06-14 12:10:42,924 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 203 transitions, 2299 flow [2024-06-14 12:10:42,924 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) [2024-06-14 12:10:42,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:42,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:42,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 12:10:42,925 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)] === [2024-06-14 12:10:42,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:42,925 INFO L85 PathProgramCache]: Analyzing trace with hash -922131020, now seen corresponding path program 3 times [2024-06-14 12:10:42,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:42,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499139614] [2024-06-14 12:10:42,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:42,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:42,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:43,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:43,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:43,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499139614] [2024-06-14 12:10:43,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499139614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:43,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:43,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:10:43,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027055650] [2024-06-14 12:10:43,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:43,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:10:43,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:43,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:10:43,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:10:44,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:10:44,067 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) [2024-06-14 12:10:44,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:44,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:10:44,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:44,954 INFO L124 PetriNetUnfolderBase]: 3005/4494 cut-off events. [2024-06-14 12:10:44,954 INFO L125 PetriNetUnfolderBase]: For 246504/246545 co-relation queries the response was YES. [2024-06-14 12:10:44,976 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. [2024-06-14 12:10:44,997 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 159 selfloop transitions, 50 changer transitions 0/241 dead transitions. [2024-06-14 12:10:44,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 241 transitions, 3003 flow [2024-06-14 12:10:44,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:10:44,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:10:44,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-14 12:10:44,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43686868686868685 [2024-06-14 12:10:44,998 INFO L175 Difference]: Start difference. First operand has 157 places, 203 transitions, 2299 flow. Second operand 9 states and 173 transitions. [2024-06-14 12:10:44,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 241 transitions, 3003 flow [2024-06-14 12:10:45,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 241 transitions, 2819 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-14 12:10:45,174 INFO L231 Difference]: Finished difference. Result has 161 places, 206 transitions, 2289 flow [2024-06-14 12:10:45,175 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} [2024-06-14 12:10:45,175 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 116 predicate places. [2024-06-14 12:10:45,175 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 206 transitions, 2289 flow [2024-06-14 12:10:45,175 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) [2024-06-14 12:10:45,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:45,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:45,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 12:10:45,175 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)] === [2024-06-14 12:10:45,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:45,176 INFO L85 PathProgramCache]: Analyzing trace with hash -922124324, now seen corresponding path program 3 times [2024-06-14 12:10:45,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:45,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350520052] [2024-06-14 12:10:45,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:45,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:45,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:46,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:46,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:46,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350520052] [2024-06-14 12:10:46,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350520052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:46,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:46,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:10:46,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458284194] [2024-06-14 12:10:46,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:46,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:10:46,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:46,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:10:46,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:10:46,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:10:46,309 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) [2024-06-14 12:10:46,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:46,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:10:46,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:47,096 INFO L124 PetriNetUnfolderBase]: 3198/4690 cut-off events. [2024-06-14 12:10:47,096 INFO L125 PetriNetUnfolderBase]: For 260784/260793 co-relation queries the response was YES. [2024-06-14 12:10:47,119 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. [2024-06-14 12:10:47,139 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 163 selfloop transitions, 89 changer transitions 0/255 dead transitions. [2024-06-14 12:10:47,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 255 transitions, 3420 flow [2024-06-14 12:10:47,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:10:47,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:10:47,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-14 12:10:47,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595959595959596 [2024-06-14 12:10:47,141 INFO L175 Difference]: Start difference. First operand has 161 places, 206 transitions, 2289 flow. Second operand 9 states and 182 transitions. [2024-06-14 12:10:47,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 255 transitions, 3420 flow [2024-06-14 12:10:47,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 255 transitions, 3291 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-14 12:10:47,371 INFO L231 Difference]: Finished difference. Result has 164 places, 210 transitions, 2432 flow [2024-06-14 12:10:47,371 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} [2024-06-14 12:10:47,372 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 119 predicate places. [2024-06-14 12:10:47,372 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 210 transitions, 2432 flow [2024-06-14 12:10:47,372 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) [2024-06-14 12:10:47,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:47,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:47,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 12:10:47,373 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)] === [2024-06-14 12:10:47,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:47,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1736730190, now seen corresponding path program 1 times [2024-06-14 12:10:47,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:47,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716038053] [2024-06-14 12:10:47,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:47,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:47,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:48,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:48,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:48,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716038053] [2024-06-14 12:10:48,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716038053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:48,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:48,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:10:48,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317694166] [2024-06-14 12:10:48,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:48,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:10:48,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:48,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:10:48,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:10:48,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:10:48,944 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) [2024-06-14 12:10:48,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:48,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:10:48,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:49,797 INFO L124 PetriNetUnfolderBase]: 3095/4595 cut-off events. [2024-06-14 12:10:49,798 INFO L125 PetriNetUnfolderBase]: For 280850/280872 co-relation queries the response was YES. [2024-06-14 12:10:49,822 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. [2024-06-14 12:10:49,846 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 188 selfloop transitions, 40 changer transitions 0/246 dead transitions. [2024-06-14 12:10:49,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 246 transitions, 3270 flow [2024-06-14 12:10:49,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:10:49,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:10:49,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-14 12:10:49,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45738636363636365 [2024-06-14 12:10:49,847 INFO L175 Difference]: Start difference. First operand has 164 places, 210 transitions, 2432 flow. Second operand 8 states and 161 transitions. [2024-06-14 12:10:49,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 246 transitions, 3270 flow [2024-06-14 12:10:50,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 246 transitions, 3059 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-14 12:10:50,080 INFO L231 Difference]: Finished difference. Result has 166 places, 213 transitions, 2395 flow [2024-06-14 12:10:50,080 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} [2024-06-14 12:10:50,080 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 121 predicate places. [2024-06-14 12:10:50,080 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 213 transitions, 2395 flow [2024-06-14 12:10:50,080 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) [2024-06-14 12:10:50,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:50,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:50,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 12:10:50,081 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)] === [2024-06-14 12:10:50,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:50,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1736490622, now seen corresponding path program 4 times [2024-06-14 12:10:50,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:50,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073287846] [2024-06-14 12:10:50,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:50,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:50,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:51,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:51,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:51,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073287846] [2024-06-14 12:10:51,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073287846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:51,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:51,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:10:51,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980810799] [2024-06-14 12:10:51,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:51,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:10:51,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:51,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:10:51,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:10:51,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:10:51,221 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) [2024-06-14 12:10:51,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:51,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:10:51,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:52,083 INFO L124 PetriNetUnfolderBase]: 3366/4933 cut-off events. [2024-06-14 12:10:52,083 INFO L125 PetriNetUnfolderBase]: For 301609/301618 co-relation queries the response was YES. [2024-06-14 12:10:52,110 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. [2024-06-14 12:10:52,134 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 177 selfloop transitions, 91 changer transitions 0/271 dead transitions. [2024-06-14 12:10:52,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 271 transitions, 3993 flow [2024-06-14 12:10:52,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:10:52,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:10:52,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-14 12:10:52,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46464646464646464 [2024-06-14 12:10:52,135 INFO L175 Difference]: Start difference. First operand has 166 places, 213 transitions, 2395 flow. Second operand 9 states and 184 transitions. [2024-06-14 12:10:52,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 271 transitions, 3993 flow [2024-06-14 12:10:52,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 271 transitions, 3841 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-14 12:10:52,398 INFO L231 Difference]: Finished difference. Result has 171 places, 225 transitions, 2694 flow [2024-06-14 12:10:52,398 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} [2024-06-14 12:10:52,398 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 126 predicate places. [2024-06-14 12:10:52,398 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 225 transitions, 2694 flow [2024-06-14 12:10:52,399 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) [2024-06-14 12:10:52,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:52,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:52,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 12:10:52,399 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)] === [2024-06-14 12:10:52,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:52,399 INFO L85 PathProgramCache]: Analyzing trace with hash -749640944, now seen corresponding path program 5 times [2024-06-14 12:10:52,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:52,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753793993] [2024-06-14 12:10:52,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:52,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:52,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:53,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:53,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:53,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753793993] [2024-06-14 12:10:53,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753793993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:53,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:53,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:10:53,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666991914] [2024-06-14 12:10:53,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:53,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:10:53,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:53,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:10:53,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:10:53,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:10:53,488 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) [2024-06-14 12:10:53,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:53,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:10:53,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:54,357 INFO L124 PetriNetUnfolderBase]: 3354/4917 cut-off events. [2024-06-14 12:10:54,358 INFO L125 PetriNetUnfolderBase]: For 317155/317164 co-relation queries the response was YES. [2024-06-14 12:10:54,384 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. [2024-06-14 12:10:54,406 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 177 selfloop transitions, 90 changer transitions 0/270 dead transitions. [2024-06-14 12:10:54,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 270 transitions, 4018 flow [2024-06-14 12:10:54,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:10:54,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:10:54,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-14 12:10:54,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595959595959596 [2024-06-14 12:10:54,407 INFO L175 Difference]: Start difference. First operand has 171 places, 225 transitions, 2694 flow. Second operand 9 states and 182 transitions. [2024-06-14 12:10:54,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 270 transitions, 4018 flow [2024-06-14 12:10:54,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 270 transitions, 3759 flow, removed 72 selfloop flow, removed 4 redundant places. [2024-06-14 12:10:54,720 INFO L231 Difference]: Finished difference. Result has 176 places, 225 transitions, 2627 flow [2024-06-14 12:10:54,720 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} [2024-06-14 12:10:54,720 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 131 predicate places. [2024-06-14 12:10:54,721 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 225 transitions, 2627 flow [2024-06-14 12:10:54,721 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) [2024-06-14 12:10:54,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:54,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:54,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 12:10:54,721 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)] === [2024-06-14 12:10:54,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:54,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1736483926, now seen corresponding path program 4 times [2024-06-14 12:10:54,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:54,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268546413] [2024-06-14 12:10:54,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:54,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:54,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:55,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:55,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:55,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268546413] [2024-06-14 12:10:55,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268546413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:55,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:55,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:10:55,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428994318] [2024-06-14 12:10:55,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:55,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:10:55,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:55,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:10:55,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:10:55,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:10:55,908 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) [2024-06-14 12:10:55,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:55,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:10:55,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:56,668 INFO L124 PetriNetUnfolderBase]: 3170/4737 cut-off events. [2024-06-14 12:10:56,668 INFO L125 PetriNetUnfolderBase]: For 319695/319742 co-relation queries the response was YES. [2024-06-14 12:10:56,692 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. [2024-06-14 12:10:56,713 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 171 selfloop transitions, 52 changer transitions 0/260 dead transitions. [2024-06-14 12:10:56,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 260 transitions, 3374 flow [2024-06-14 12:10:56,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:10:56,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:10:56,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-14 12:10:56,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 12:10:56,715 INFO L175 Difference]: Start difference. First operand has 176 places, 225 transitions, 2627 flow. Second operand 9 states and 171 transitions. [2024-06-14 12:10:56,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 260 transitions, 3374 flow [2024-06-14 12:10:56,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 260 transitions, 3185 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 12:10:56,949 INFO L231 Difference]: Finished difference. Result has 177 places, 228 transitions, 2619 flow [2024-06-14 12:10:56,950 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} [2024-06-14 12:10:56,950 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 132 predicate places. [2024-06-14 12:10:56,950 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 228 transitions, 2619 flow [2024-06-14 12:10:56,951 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) [2024-06-14 12:10:56,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:56,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:56,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 12:10:56,951 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)] === [2024-06-14 12:10:56,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:56,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1736721262, now seen corresponding path program 6 times [2024-06-14 12:10:56,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:56,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806681608] [2024-06-14 12:10:56,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:56,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:56,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:58,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:58,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:58,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806681608] [2024-06-14 12:10:58,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806681608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:58,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:58,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:10:58,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620900373] [2024-06-14 12:10:58,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:58,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:10:58,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:58,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:10:58,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:10:58,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:10:58,176 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) [2024-06-14 12:10:58,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:58,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:10:58,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:58,987 INFO L124 PetriNetUnfolderBase]: 3369/4939 cut-off events. [2024-06-14 12:10:58,987 INFO L125 PetriNetUnfolderBase]: For 336344/336353 co-relation queries the response was YES. [2024-06-14 12:10:59,012 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. [2024-06-14 12:10:59,033 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 163 selfloop transitions, 107 changer transitions 0/273 dead transitions. [2024-06-14 12:10:59,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 273 transitions, 3768 flow [2024-06-14 12:10:59,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:10:59,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:10:59,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-14 12:10:59,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45202020202020204 [2024-06-14 12:10:59,034 INFO L175 Difference]: Start difference. First operand has 177 places, 228 transitions, 2619 flow. Second operand 9 states and 179 transitions. [2024-06-14 12:10:59,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 273 transitions, 3768 flow [2024-06-14 12:10:59,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 273 transitions, 3634 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-14 12:10:59,311 INFO L231 Difference]: Finished difference. Result has 180 places, 232 transitions, 2807 flow [2024-06-14 12:10:59,311 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} [2024-06-14 12:10:59,311 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 135 predicate places. [2024-06-14 12:10:59,312 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 232 transitions, 2807 flow [2024-06-14 12:10:59,312 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) [2024-06-14 12:10:59,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:59,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:59,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 12:10:59,312 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)] === [2024-06-14 12:10:59,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:59,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1945906157, now seen corresponding path program 1 times [2024-06-14 12:10:59,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:59,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520257717] [2024-06-14 12:10:59,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:59,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:59,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:00,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:00,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:00,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520257717] [2024-06-14 12:11:00,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520257717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:00,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:00,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:11:00,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462859253] [2024-06-14 12:11:00,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:00,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:11:00,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:00,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:11:00,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:11:00,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:11:00,211 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) [2024-06-14 12:11:00,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:00,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:11:00,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:00,917 INFO L124 PetriNetUnfolderBase]: 3028/4575 cut-off events. [2024-06-14 12:11:00,917 INFO L125 PetriNetUnfolderBase]: For 349375/349399 co-relation queries the response was YES. [2024-06-14 12:11:00,942 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. [2024-06-14 12:11:00,964 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 201 selfloop transitions, 16 changer transitions 0/251 dead transitions. [2024-06-14 12:11:00,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 251 transitions, 3417 flow [2024-06-14 12:11:00,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:11:00,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:11:00,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-06-14 12:11:00,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-14 12:11:00,965 INFO L175 Difference]: Start difference. First operand has 180 places, 232 transitions, 2807 flow. Second operand 6 states and 117 transitions. [2024-06-14 12:11:00,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 251 transitions, 3417 flow [2024-06-14 12:11:01,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 251 transitions, 3217 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-14 12:11:01,286 INFO L231 Difference]: Finished difference. Result has 181 places, 235 transitions, 2699 flow [2024-06-14 12:11:01,286 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} [2024-06-14 12:11:01,286 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 136 predicate places. [2024-06-14 12:11:01,286 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 235 transitions, 2699 flow [2024-06-14 12:11:01,289 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) [2024-06-14 12:11:01,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:01,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:01,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 12:11:01,289 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)] === [2024-06-14 12:11:01,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:01,290 INFO L85 PathProgramCache]: Analyzing trace with hash -2092227124, now seen corresponding path program 2 times [2024-06-14 12:11:01,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:01,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120285017] [2024-06-14 12:11:01,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:01,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:01,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:02,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:02,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:02,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120285017] [2024-06-14 12:11:02,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120285017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:02,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:02,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:11:02,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612240486] [2024-06-14 12:11:02,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:02,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:11:02,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:02,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:11:02,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:11:02,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:11:02,357 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) [2024-06-14 12:11:02,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:02,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:11:02,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:03,260 INFO L124 PetriNetUnfolderBase]: 3229/4800 cut-off events. [2024-06-14 12:11:03,261 INFO L125 PetriNetUnfolderBase]: For 367134/367150 co-relation queries the response was YES. [2024-06-14 12:11:03,287 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. [2024-06-14 12:11:03,308 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 218 selfloop transitions, 28 changer transitions 0/264 dead transitions. [2024-06-14 12:11:03,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 264 transitions, 3431 flow [2024-06-14 12:11:03,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:11:03,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:11:03,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 12:11:03,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289772727272727 [2024-06-14 12:11:03,310 INFO L175 Difference]: Start difference. First operand has 181 places, 235 transitions, 2699 flow. Second operand 8 states and 151 transitions. [2024-06-14 12:11:03,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 264 transitions, 3431 flow [2024-06-14 12:11:03,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 264 transitions, 3338 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-14 12:11:03,648 INFO L231 Difference]: Finished difference. Result has 184 places, 238 transitions, 2768 flow [2024-06-14 12:11:03,648 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} [2024-06-14 12:11:03,649 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 139 predicate places. [2024-06-14 12:11:03,649 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 238 transitions, 2768 flow [2024-06-14 12:11:03,649 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) [2024-06-14 12:11:03,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:03,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:03,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 12:11:03,650 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)] === [2024-06-14 12:11:03,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:03,650 INFO L85 PathProgramCache]: Analyzing trace with hash 188610494, now seen corresponding path program 3 times [2024-06-14 12:11:03,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:03,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759100287] [2024-06-14 12:11:03,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:03,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:03,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:04,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:04,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:04,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759100287] [2024-06-14 12:11:04,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759100287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:04,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:04,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:11:04,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77858533] [2024-06-14 12:11:04,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:04,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:11:04,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:04,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:11:04,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:11:04,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:11:04,805 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) [2024-06-14 12:11:04,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:04,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:11:04,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:05,726 INFO L124 PetriNetUnfolderBase]: 3249/4836 cut-off events. [2024-06-14 12:11:05,726 INFO L125 PetriNetUnfolderBase]: For 385322/385338 co-relation queries the response was YES. [2024-06-14 12:11:05,750 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. [2024-06-14 12:11:05,771 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 225 selfloop transitions, 24 changer transitions 0/267 dead transitions. [2024-06-14 12:11:05,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 267 transitions, 3516 flow [2024-06-14 12:11:05,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:11:05,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:11:05,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 12:11:05,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-14 12:11:05,773 INFO L175 Difference]: Start difference. First operand has 184 places, 238 transitions, 2768 flow. Second operand 8 states and 150 transitions. [2024-06-14 12:11:05,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 267 transitions, 3516 flow [2024-06-14 12:11:06,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 267 transitions, 3378 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-14 12:11:06,142 INFO L231 Difference]: Finished difference. Result has 186 places, 241 transitions, 2790 flow [2024-06-14 12:11:06,142 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} [2024-06-14 12:11:06,142 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 141 predicate places. [2024-06-14 12:11:06,142 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 241 transitions, 2790 flow [2024-06-14 12:11:06,142 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) [2024-06-14 12:11:06,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:06,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:06,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 12:11:06,143 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)] === [2024-06-14 12:11:06,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:06,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1907164782, now seen corresponding path program 4 times [2024-06-14 12:11:06,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:06,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955171262] [2024-06-14 12:11:06,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:06,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:06,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:07,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:07,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:07,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955171262] [2024-06-14 12:11:07,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955171262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:07,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:07,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:11:07,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490108367] [2024-06-14 12:11:07,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:07,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:11:07,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:07,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:11:07,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:11:07,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:11:07,469 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) [2024-06-14 12:11:07,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:07,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:11:07,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:08,407 INFO L124 PetriNetUnfolderBase]: 3274/4872 cut-off events. [2024-06-14 12:11:08,407 INFO L125 PetriNetUnfolderBase]: For 404109/404130 co-relation queries the response was YES. [2024-06-14 12:11:08,437 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. [2024-06-14 12:11:08,459 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 224 selfloop transitions, 30 changer transitions 0/272 dead transitions. [2024-06-14 12:11:08,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 272 transitions, 3650 flow [2024-06-14 12:11:08,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:11:08,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:11:08,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 12:11:08,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-14 12:11:08,461 INFO L175 Difference]: Start difference. First operand has 186 places, 241 transitions, 2790 flow. Second operand 8 states and 153 transitions. [2024-06-14 12:11:08,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 272 transitions, 3650 flow [2024-06-14 12:11:08,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 272 transitions, 3514 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-14 12:11:08,845 INFO L231 Difference]: Finished difference. Result has 188 places, 244 transitions, 2832 flow [2024-06-14 12:11:08,845 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} [2024-06-14 12:11:08,846 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 143 predicate places. [2024-06-14 12:11:08,846 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 244 transitions, 2832 flow [2024-06-14 12:11:08,846 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) [2024-06-14 12:11:08,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:08,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:08,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 12:11:08,846 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)] === [2024-06-14 12:11:08,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:08,847 INFO L85 PathProgramCache]: Analyzing trace with hash -2102414344, now seen corresponding path program 5 times [2024-06-14 12:11:08,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:08,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368844299] [2024-06-14 12:11:08,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:08,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:08,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:09,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:09,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:09,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368844299] [2024-06-14 12:11:09,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368844299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:09,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:09,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:11:09,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43378992] [2024-06-14 12:11:09,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:09,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:11:09,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:09,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:11:09,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:11:09,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:11:09,977 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) [2024-06-14 12:11:09,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:09,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:11:09,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:10,987 INFO L124 PetriNetUnfolderBase]: 3294/4899 cut-off events. [2024-06-14 12:11:10,987 INFO L125 PetriNetUnfolderBase]: For 418601/418622 co-relation queries the response was YES. [2024-06-14 12:11:11,012 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. [2024-06-14 12:11:11,034 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 219 selfloop transitions, 36 changer transitions 0/273 dead transitions. [2024-06-14 12:11:11,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 273 transitions, 3608 flow [2024-06-14 12:11:11,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:11:11,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:11:11,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 12:11:11,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 12:11:11,035 INFO L175 Difference]: Start difference. First operand has 188 places, 244 transitions, 2832 flow. Second operand 8 states and 152 transitions. [2024-06-14 12:11:11,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 273 transitions, 3608 flow [2024-06-14 12:11:11,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 273 transitions, 3454 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-14 12:11:11,382 INFO L231 Difference]: Finished difference. Result has 190 places, 247 transitions, 2878 flow [2024-06-14 12:11:11,382 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} [2024-06-14 12:11:11,382 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 145 predicate places. [2024-06-14 12:11:11,382 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 247 transitions, 2878 flow [2024-06-14 12:11:11,383 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) [2024-06-14 12:11:11,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:11,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:11,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 12:11:11,383 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)] === [2024-06-14 12:11:11,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:11,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1410105952, now seen corresponding path program 7 times [2024-06-14 12:11:11,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:11,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10940764] [2024-06-14 12:11:11,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:11,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:11,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:12,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:12,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:12,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10940764] [2024-06-14 12:11:12,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10940764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:12,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:12,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:11:12,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192282590] [2024-06-14 12:11:12,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:12,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:11:12,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:12,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:11:12,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:11:12,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:11:12,373 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) [2024-06-14 12:11:12,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:12,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:11:12,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:13,368 INFO L124 PetriNetUnfolderBase]: 3497/5134 cut-off events. [2024-06-14 12:11:13,368 INFO L125 PetriNetUnfolderBase]: For 430958/430958 co-relation queries the response was YES. [2024-06-14 12:11:13,393 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. [2024-06-14 12:11:13,414 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 250 selfloop transitions, 29 changer transitions 0/282 dead transitions. [2024-06-14 12:11:13,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 282 transitions, 3714 flow [2024-06-14 12:11:13,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:11:13,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:11:13,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-14 12:11:13,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065656565656566 [2024-06-14 12:11:13,415 INFO L175 Difference]: Start difference. First operand has 190 places, 247 transitions, 2878 flow. Second operand 9 states and 161 transitions. [2024-06-14 12:11:13,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 282 transitions, 3714 flow [2024-06-14 12:11:13,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 282 transitions, 3538 flow, removed 56 selfloop flow, removed 6 redundant places. [2024-06-14 12:11:13,795 INFO L231 Difference]: Finished difference. Result has 193 places, 251 transitions, 2883 flow [2024-06-14 12:11:13,796 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} [2024-06-14 12:11:13,796 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 148 predicate places. [2024-06-14 12:11:13,796 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 251 transitions, 2883 flow [2024-06-14 12:11:13,796 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) [2024-06-14 12:11:13,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:13,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:13,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 12:11:13,797 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)] === [2024-06-14 12:11:13,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:13,797 INFO L85 PathProgramCache]: Analyzing trace with hash -611106092, now seen corresponding path program 1 times [2024-06-14 12:11:13,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:13,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638544327] [2024-06-14 12:11:13,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:13,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:13,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:14,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:14,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:14,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638544327] [2024-06-14 12:11:14,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638544327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:14,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:14,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:11:14,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12718794] [2024-06-14 12:11:14,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:14,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:11:14,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:14,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:11:14,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:11:14,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:11:14,884 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) [2024-06-14 12:11:14,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:14,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:11:14,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:15,867 INFO L124 PetriNetUnfolderBase]: 3499/5137 cut-off events. [2024-06-14 12:11:15,867 INFO L125 PetriNetUnfolderBase]: For 426674/426674 co-relation queries the response was YES. [2024-06-14 12:11:15,896 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. [2024-06-14 12:11:15,919 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 240 selfloop transitions, 38 changer transitions 0/281 dead transitions. [2024-06-14 12:11:15,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 281 transitions, 3713 flow [2024-06-14 12:11:15,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:11:15,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:11:15,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 12:11:15,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4147727272727273 [2024-06-14 12:11:15,921 INFO L175 Difference]: Start difference. First operand has 193 places, 251 transitions, 2883 flow. Second operand 8 states and 146 transitions. [2024-06-14 12:11:15,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 281 transitions, 3713 flow [2024-06-14 12:11:16,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 281 transitions, 3584 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-14 12:11:16,336 INFO L231 Difference]: Finished difference. Result has 194 places, 255 transitions, 2966 flow [2024-06-14 12:11:16,337 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} [2024-06-14 12:11:16,337 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 149 predicate places. [2024-06-14 12:11:16,337 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 255 transitions, 2966 flow [2024-06-14 12:11:16,337 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) [2024-06-14 12:11:16,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:16,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:16,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 12:11:16,338 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)] === [2024-06-14 12:11:16,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:16,338 INFO L85 PathProgramCache]: Analyzing trace with hash -619446580, now seen corresponding path program 8 times [2024-06-14 12:11:16,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:16,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905262468] [2024-06-14 12:11:16,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:16,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:16,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:17,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:17,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:17,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905262468] [2024-06-14 12:11:17,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905262468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:17,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:17,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:11:17,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97103387] [2024-06-14 12:11:17,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:17,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:11:17,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:17,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:11:17,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:11:17,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:11:17,390 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) [2024-06-14 12:11:17,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:17,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:11:17,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:18,277 INFO L124 PetriNetUnfolderBase]: 3551/5211 cut-off events. [2024-06-14 12:11:18,277 INFO L125 PetriNetUnfolderBase]: For 450940/450940 co-relation queries the response was YES. [2024-06-14 12:11:18,307 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. [2024-06-14 12:11:18,331 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 244 selfloop transitions, 54 changer transitions 0/301 dead transitions. [2024-06-14 12:11:18,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 301 transitions, 4304 flow [2024-06-14 12:11:18,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:11:18,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:11:18,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-14 12:11:18,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292929292929293 [2024-06-14 12:11:18,332 INFO L175 Difference]: Start difference. First operand has 194 places, 255 transitions, 2966 flow. Second operand 9 states and 170 transitions. [2024-06-14 12:11:18,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 301 transitions, 4304 flow [2024-06-14 12:11:18,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 301 transitions, 4144 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-14 12:11:18,739 INFO L231 Difference]: Finished difference. Result has 198 places, 266 transitions, 3240 flow [2024-06-14 12:11:18,740 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} [2024-06-14 12:11:18,740 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 153 predicate places. [2024-06-14 12:11:18,740 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 266 transitions, 3240 flow [2024-06-14 12:11:18,741 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) [2024-06-14 12:11:18,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:18,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:18,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 12:11:18,741 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)] === [2024-06-14 12:11:18,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:18,742 INFO L85 PathProgramCache]: Analyzing trace with hash -619677220, now seen corresponding path program 9 times [2024-06-14 12:11:18,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:18,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470209244] [2024-06-14 12:11:18,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:18,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:18,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:19,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:19,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:19,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470209244] [2024-06-14 12:11:19,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470209244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:19,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:19,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:11:19,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31718382] [2024-06-14 12:11:19,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:19,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:11:19,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:19,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:11:19,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:11:19,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:11:19,794 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) [2024-06-14 12:11:19,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:19,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:11:19,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:20,783 INFO L124 PetriNetUnfolderBase]: 3587/5263 cut-off events. [2024-06-14 12:11:20,783 INFO L125 PetriNetUnfolderBase]: For 476419/476419 co-relation queries the response was YES. [2024-06-14 12:11:20,812 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. [2024-06-14 12:11:20,836 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 247 selfloop transitions, 56 changer transitions 0/306 dead transitions. [2024-06-14 12:11:20,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 306 transitions, 4535 flow [2024-06-14 12:11:20,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:11:20,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:11:20,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-14 12:11:20,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292929292929293 [2024-06-14 12:11:20,837 INFO L175 Difference]: Start difference. First operand has 198 places, 266 transitions, 3240 flow. Second operand 9 states and 170 transitions. [2024-06-14 12:11:20,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 306 transitions, 4535 flow [2024-06-14 12:11:21,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 306 transitions, 4389 flow, removed 62 selfloop flow, removed 4 redundant places. [2024-06-14 12:11:21,259 INFO L231 Difference]: Finished difference. Result has 203 places, 270 transitions, 3336 flow [2024-06-14 12:11:21,260 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} [2024-06-14 12:11:21,260 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 158 predicate places. [2024-06-14 12:11:21,260 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 270 transitions, 3336 flow [2024-06-14 12:11:21,260 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) [2024-06-14 12:11:21,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:21,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:21,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 12:11:21,260 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)] === [2024-06-14 12:11:21,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:21,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1418386858, now seen corresponding path program 5 times [2024-06-14 12:11:21,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:21,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415803222] [2024-06-14 12:11:21,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:21,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:21,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:22,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:22,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:22,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415803222] [2024-06-14 12:11:22,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415803222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:22,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:22,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:11:22,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143130110] [2024-06-14 12:11:22,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:22,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:11:22,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:22,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:11:22,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:11:22,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:11:22,407 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) [2024-06-14 12:11:22,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:22,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:11:22,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:23,303 INFO L124 PetriNetUnfolderBase]: 3367/5040 cut-off events. [2024-06-14 12:11:23,303 INFO L125 PetriNetUnfolderBase]: For 473263/473323 co-relation queries the response was YES. [2024-06-14 12:11:23,333 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. [2024-06-14 12:11:23,357 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 228 selfloop transitions, 20 changer transitions 0/297 dead transitions. [2024-06-14 12:11:23,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 297 transitions, 3900 flow [2024-06-14 12:11:23,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:11:23,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:11:23,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-14 12:11:23,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.398989898989899 [2024-06-14 12:11:23,359 INFO L175 Difference]: Start difference. First operand has 203 places, 270 transitions, 3336 flow. Second operand 9 states and 158 transitions. [2024-06-14 12:11:23,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 297 transitions, 3900 flow [2024-06-14 12:11:23,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 297 transitions, 3674 flow, removed 62 selfloop flow, removed 7 redundant places. [2024-06-14 12:11:23,834 INFO L231 Difference]: Finished difference. Result has 205 places, 270 transitions, 3158 flow [2024-06-14 12:11:23,835 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} [2024-06-14 12:11:23,835 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 160 predicate places. [2024-06-14 12:11:23,835 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 270 transitions, 3158 flow [2024-06-14 12:11:23,835 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) [2024-06-14 12:11:23,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:23,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:23,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 12:11:23,835 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)] === [2024-06-14 12:11:23,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:23,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1906918704, now seen corresponding path program 10 times [2024-06-14 12:11:23,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:23,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262143474] [2024-06-14 12:11:23,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:23,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:23,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:24,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:24,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:24,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262143474] [2024-06-14 12:11:24,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262143474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:24,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:24,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:11:24,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791881332] [2024-06-14 12:11:24,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:24,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:11:24,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:24,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:11:24,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:11:24,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:11:24,913 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) [2024-06-14 12:11:24,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:24,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:11:24,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:25,887 INFO L124 PetriNetUnfolderBase]: 3570/5240 cut-off events. [2024-06-14 12:11:25,887 INFO L125 PetriNetUnfolderBase]: For 491336/491336 co-relation queries the response was YES. [2024-06-14 12:11:25,919 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. [2024-06-14 12:11:25,945 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 246 selfloop transitions, 56 changer transitions 0/305 dead transitions. [2024-06-14 12:11:25,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 305 transitions, 4254 flow [2024-06-14 12:11:25,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:11:25,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:11:25,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-14 12:11:25,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-14 12:11:25,947 INFO L175 Difference]: Start difference. First operand has 205 places, 270 transitions, 3158 flow. Second operand 9 states and 168 transitions. [2024-06-14 12:11:25,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 305 transitions, 4254 flow [2024-06-14 12:11:26,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 305 transitions, 4070 flow, removed 40 selfloop flow, removed 10 redundant places. [2024-06-14 12:11:26,412 INFO L231 Difference]: Finished difference. Result has 204 places, 270 transitions, 3096 flow [2024-06-14 12:11:26,412 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} [2024-06-14 12:11:26,413 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 159 predicate places. [2024-06-14 12:11:26,413 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 270 transitions, 3096 flow [2024-06-14 12:11:26,413 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) [2024-06-14 12:11:26,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:26,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:26,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 12:11:26,414 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)] === [2024-06-14 12:11:26,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:26,414 INFO L85 PathProgramCache]: Analyzing trace with hash -761870129, now seen corresponding path program 2 times [2024-06-14 12:11:26,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:26,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852597896] [2024-06-14 12:11:26,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:26,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:26,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:27,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:27,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:27,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852597896] [2024-06-14 12:11:27,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852597896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:27,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:27,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:11:27,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171824832] [2024-06-14 12:11:27,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:27,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:11:27,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:27,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:11:27,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:11:27,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:11:27,182 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) [2024-06-14 12:11:27,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:27,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:11:27,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:27,966 INFO L124 PetriNetUnfolderBase]: 3188/4833 cut-off events. [2024-06-14 12:11:27,966 INFO L125 PetriNetUnfolderBase]: For 493056/493080 co-relation queries the response was YES. [2024-06-14 12:11:27,996 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. [2024-06-14 12:11:28,019 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 228 selfloop transitions, 11 changer transitions 0/279 dead transitions. [2024-06-14 12:11:28,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 279 transitions, 3596 flow [2024-06-14 12:11:28,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:11:28,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:11:28,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-14 12:11:28,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-14 12:11:28,020 INFO L175 Difference]: Start difference. First operand has 204 places, 270 transitions, 3096 flow. Second operand 6 states and 108 transitions. [2024-06-14 12:11:28,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 279 transitions, 3596 flow [2024-06-14 12:11:28,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 279 transitions, 3479 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-14 12:11:28,475 INFO L231 Difference]: Finished difference. Result has 203 places, 270 transitions, 3007 flow [2024-06-14 12:11:28,475 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} [2024-06-14 12:11:28,475 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 158 predicate places. [2024-06-14 12:11:28,475 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 270 transitions, 3007 flow [2024-06-14 12:11:28,475 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) [2024-06-14 12:11:28,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:28,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:28,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 12:11:28,476 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)] === [2024-06-14 12:11:28,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:28,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1953532653, now seen corresponding path program 1 times [2024-06-14 12:11:28,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:28,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740250395] [2024-06-14 12:11:28,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:28,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:28,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:29,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:29,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:29,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740250395] [2024-06-14 12:11:29,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740250395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:29,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:29,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:11:29,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016963082] [2024-06-14 12:11:29,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:29,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:11:29,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:29,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:11:29,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:11:29,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:11:29,211 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) [2024-06-14 12:11:29,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:29,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:11:29,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:30,129 INFO L124 PetriNetUnfolderBase]: 3360/5005 cut-off events. [2024-06-14 12:11:30,129 INFO L125 PetriNetUnfolderBase]: For 508689/508713 co-relation queries the response was YES. [2024-06-14 12:11:30,163 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. [2024-06-14 12:11:30,188 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 243 selfloop transitions, 24 changer transitions 0/286 dead transitions. [2024-06-14 12:11:30,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 286 transitions, 3719 flow [2024-06-14 12:11:30,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:11:30,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:11:30,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-14 12:11:30,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42803030303030304 [2024-06-14 12:11:30,189 INFO L175 Difference]: Start difference. First operand has 203 places, 270 transitions, 3007 flow. Second operand 6 states and 113 transitions. [2024-06-14 12:11:30,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 286 transitions, 3719 flow [2024-06-14 12:11:30,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 286 transitions, 3687 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 12:11:30,631 INFO L231 Difference]: Finished difference. Result has 204 places, 273 transitions, 3078 flow [2024-06-14 12:11:30,631 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} [2024-06-14 12:11:30,632 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 159 predicate places. [2024-06-14 12:11:30,632 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 273 transitions, 3078 flow [2024-06-14 12:11:30,632 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) [2024-06-14 12:11:30,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:30,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:30,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 12:11:30,632 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)] === [2024-06-14 12:11:30,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:30,633 INFO L85 PathProgramCache]: Analyzing trace with hash -760449523, now seen corresponding path program 2 times [2024-06-14 12:11:30,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:30,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568807138] [2024-06-14 12:11:30,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:30,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:30,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:31,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:31,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:31,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568807138] [2024-06-14 12:11:31,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568807138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:31,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:31,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:11:31,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482361392] [2024-06-14 12:11:31,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:31,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:11:31,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:31,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:11:31,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:11:31,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:11:31,366 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) [2024-06-14 12:11:31,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:31,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:11:31,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:32,294 INFO L124 PetriNetUnfolderBase]: 3326/4953 cut-off events. [2024-06-14 12:11:32,294 INFO L125 PetriNetUnfolderBase]: For 520689/520719 co-relation queries the response was YES. [2024-06-14 12:11:32,325 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. [2024-06-14 12:11:32,349 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 238 selfloop transitions, 25 changer transitions 0/282 dead transitions. [2024-06-14 12:11:32,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 282 transitions, 3626 flow [2024-06-14 12:11:32,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:11:32,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:11:32,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-14 12:11:32,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-14 12:11:32,350 INFO L175 Difference]: Start difference. First operand has 204 places, 273 transitions, 3078 flow. Second operand 6 states and 110 transitions. [2024-06-14 12:11:32,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 282 transitions, 3626 flow [2024-06-14 12:11:32,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 282 transitions, 3574 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-14 12:11:32,782 INFO L231 Difference]: Finished difference. Result has 206 places, 273 transitions, 3082 flow [2024-06-14 12:11:32,782 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} [2024-06-14 12:11:32,782 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 161 predicate places. [2024-06-14 12:11:32,782 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 273 transitions, 3082 flow [2024-06-14 12:11:32,782 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) [2024-06-14 12:11:32,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:32,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:32,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 12:11:32,783 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)] === [2024-06-14 12:11:32,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:32,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1331011221, now seen corresponding path program 1 times [2024-06-14 12:11:32,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:32,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059057685] [2024-06-14 12:11:32,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:32,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:32,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:34,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:34,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:34,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059057685] [2024-06-14 12:11:34,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059057685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:34,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:34,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:11:34,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890470498] [2024-06-14 12:11:34,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:34,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:11:34,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:34,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:11:34,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:11:34,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:11:34,239 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) [2024-06-14 12:11:34,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:34,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:11:34,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:35,486 INFO L124 PetriNetUnfolderBase]: 3331/4986 cut-off events. [2024-06-14 12:11:35,486 INFO L125 PetriNetUnfolderBase]: For 535780/535824 co-relation queries the response was YES. [2024-06-14 12:11:35,512 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. [2024-06-14 12:11:35,532 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 250 selfloop transitions, 26 changer transitions 0/326 dead transitions. [2024-06-14 12:11:35,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 326 transitions, 3872 flow [2024-06-14 12:11:35,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:11:35,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:11:35,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 205 transitions. [2024-06-14 12:11:35,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42355371900826444 [2024-06-14 12:11:35,534 INFO L175 Difference]: Start difference. First operand has 206 places, 273 transitions, 3082 flow. Second operand 11 states and 205 transitions. [2024-06-14 12:11:35,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 326 transitions, 3872 flow [2024-06-14 12:11:35,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 326 transitions, 3806 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 12:11:35,949 INFO L231 Difference]: Finished difference. Result has 212 places, 276 transitions, 3193 flow [2024-06-14 12:11:35,950 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} [2024-06-14 12:11:35,950 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 167 predicate places. [2024-06-14 12:11:35,950 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 276 transitions, 3193 flow [2024-06-14 12:11:35,951 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) [2024-06-14 12:11:35,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:35,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:35,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 12:11:35,951 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)] === [2024-06-14 12:11:35,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:35,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1091566994, now seen corresponding path program 1 times [2024-06-14 12:11:35,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:35,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920810504] [2024-06-14 12:11:35,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:35,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:35,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:37,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:37,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:37,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920810504] [2024-06-14 12:11:37,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920810504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:37,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:37,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:11:37,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771300704] [2024-06-14 12:11:37,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:37,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:11:37,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:37,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:11:37,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:11:37,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:11:37,285 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) [2024-06-14 12:11:37,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:37,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:11:37,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:38,391 INFO L124 PetriNetUnfolderBase]: 3602/5282 cut-off events. [2024-06-14 12:11:38,391 INFO L125 PetriNetUnfolderBase]: For 572499/572499 co-relation queries the response was YES. [2024-06-14 12:11:38,420 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. [2024-06-14 12:11:38,442 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 293 selfloop transitions, 40 changer transitions 0/336 dead transitions. [2024-06-14 12:11:38,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 336 transitions, 4683 flow [2024-06-14 12:11:38,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:11:38,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:11:38,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-14 12:11:38,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4340909090909091 [2024-06-14 12:11:38,444 INFO L175 Difference]: Start difference. First operand has 212 places, 276 transitions, 3193 flow. Second operand 10 states and 191 transitions. [2024-06-14 12:11:38,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 336 transitions, 4683 flow [2024-06-14 12:11:38,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 336 transitions, 4532 flow, removed 52 selfloop flow, removed 9 redundant places. [2024-06-14 12:11:38,914 INFO L231 Difference]: Finished difference. Result has 215 places, 287 transitions, 3418 flow [2024-06-14 12:11:38,914 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} [2024-06-14 12:11:38,915 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 170 predicate places. [2024-06-14 12:11:38,915 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 287 transitions, 3418 flow [2024-06-14 12:11:38,915 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) [2024-06-14 12:11:38,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:38,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:38,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 12:11:38,915 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)] === [2024-06-14 12:11:38,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:38,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1095291644, now seen corresponding path program 2 times [2024-06-14 12:11:38,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:38,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113130329] [2024-06-14 12:11:38,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:38,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:38,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:39,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:39,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:39,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113130329] [2024-06-14 12:11:39,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113130329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:39,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:39,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:11:39,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344334095] [2024-06-14 12:11:39,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:39,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:11:39,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:39,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:11:39,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:11:40,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:11:40,103 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) [2024-06-14 12:11:40,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:40,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:11:40,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:41,188 INFO L124 PetriNetUnfolderBase]: 3734/5470 cut-off events. [2024-06-14 12:11:41,188 INFO L125 PetriNetUnfolderBase]: For 622124/622130 co-relation queries the response was YES. [2024-06-14 12:11:41,224 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. [2024-06-14 12:11:41,253 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 215 selfloop transitions, 139 changer transitions 0/357 dead transitions. [2024-06-14 12:11:41,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 357 transitions, 5542 flow [2024-06-14 12:11:41,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:11:41,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:11:41,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-06-14 12:11:41,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681818181818182 [2024-06-14 12:11:41,254 INFO L175 Difference]: Start difference. First operand has 215 places, 287 transitions, 3418 flow. Second operand 10 states and 206 transitions. [2024-06-14 12:11:41,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 357 transitions, 5542 flow [2024-06-14 12:11:41,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 357 transitions, 5028 flow, removed 89 selfloop flow, removed 10 redundant places. [2024-06-14 12:11:41,985 INFO L231 Difference]: Finished difference. Result has 217 places, 302 transitions, 3647 flow [2024-06-14 12:11:41,985 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} [2024-06-14 12:11:41,985 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 172 predicate places. [2024-06-14 12:11:41,985 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 302 transitions, 3647 flow [2024-06-14 12:11:41,985 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) [2024-06-14 12:11:41,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:41,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:41,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 12:11:41,986 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)] === [2024-06-14 12:11:41,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:41,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1095285909, now seen corresponding path program 2 times [2024-06-14 12:11:41,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:41,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708004501] [2024-06-14 12:11:41,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:41,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:41,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:43,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:43,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:43,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708004501] [2024-06-14 12:11:43,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708004501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:43,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:43,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:11:43,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051605288] [2024-06-14 12:11:43,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:43,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:11:43,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:43,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:11:43,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:11:43,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:11:43,316 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) [2024-06-14 12:11:43,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:43,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:11:43,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:44,327 INFO L124 PetriNetUnfolderBase]: 3557/5298 cut-off events. [2024-06-14 12:11:44,327 INFO L125 PetriNetUnfolderBase]: For 638521/638573 co-relation queries the response was YES. [2024-06-14 12:11:44,365 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. [2024-06-14 12:11:44,394 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 230 selfloop transitions, 58 changer transitions 0/345 dead transitions. [2024-06-14 12:11:44,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 345 transitions, 4451 flow [2024-06-14 12:11:44,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:11:44,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:11:44,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-14 12:11:44,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42954545454545456 [2024-06-14 12:11:44,396 INFO L175 Difference]: Start difference. First operand has 217 places, 302 transitions, 3647 flow. Second operand 10 states and 189 transitions. [2024-06-14 12:11:44,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 345 transitions, 4451 flow [2024-06-14 12:11:45,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 345 transitions, 4159 flow, removed 103 selfloop flow, removed 4 redundant places. [2024-06-14 12:11:45,107 INFO L231 Difference]: Finished difference. Result has 223 places, 305 transitions, 3611 flow [2024-06-14 12:11:45,107 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} [2024-06-14 12:11:45,108 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 178 predicate places. [2024-06-14 12:11:45,108 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 305 transitions, 3611 flow [2024-06-14 12:11:45,108 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) [2024-06-14 12:11:45,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:45,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:45,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 12:11:45,108 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)] === [2024-06-14 12:11:45,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:45,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1095286064, now seen corresponding path program 3 times [2024-06-14 12:11:45,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:45,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552908908] [2024-06-14 12:11:45,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:45,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:45,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:46,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:46,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:46,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552908908] [2024-06-14 12:11:46,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552908908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:46,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:46,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:11:46,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830879693] [2024-06-14 12:11:46,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:46,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:11:46,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:46,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:11:46,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:11:46,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:11:46,293 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) [2024-06-14 12:11:46,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:46,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:11:46,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:47,436 INFO L124 PetriNetUnfolderBase]: 3733/5470 cut-off events. [2024-06-14 12:11:47,436 INFO L125 PetriNetUnfolderBase]: For 651679/651685 co-relation queries the response was YES. [2024-06-14 12:11:47,469 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. [2024-06-14 12:11:47,493 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 222 selfloop transitions, 134 changer transitions 0/359 dead transitions. [2024-06-14 12:11:47,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 359 transitions, 5265 flow [2024-06-14 12:11:47,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:11:47,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:11:47,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2024-06-14 12:11:47,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2024-06-14 12:11:47,494 INFO L175 Difference]: Start difference. First operand has 223 places, 305 transitions, 3611 flow. Second operand 10 states and 205 transitions. [2024-06-14 12:11:47,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 359 transitions, 5265 flow [2024-06-14 12:11:48,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 359 transitions, 4953 flow, removed 100 selfloop flow, removed 8 redundant places. [2024-06-14 12:11:48,121 INFO L231 Difference]: Finished difference. Result has 225 places, 305 transitions, 3577 flow [2024-06-14 12:11:48,121 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} [2024-06-14 12:11:48,122 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 180 predicate places. [2024-06-14 12:11:48,122 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 305 transitions, 3577 flow [2024-06-14 12:11:48,122 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) [2024-06-14 12:11:48,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:48,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:48,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 12:11:48,123 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)] === [2024-06-14 12:11:48,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:48,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1478716766, now seen corresponding path program 4 times [2024-06-14 12:11:48,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:48,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413520758] [2024-06-14 12:11:48,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:48,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:48,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:49,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:49,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:49,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413520758] [2024-06-14 12:11:49,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413520758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:49,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:49,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:11:49,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14653073] [2024-06-14 12:11:49,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:49,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:11:49,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:49,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:11:49,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:11:49,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:11:49,351 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) [2024-06-14 12:11:49,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:49,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:11:49,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:50,577 INFO L124 PetriNetUnfolderBase]: 3873/5669 cut-off events. [2024-06-14 12:11:50,577 INFO L125 PetriNetUnfolderBase]: For 699879/699885 co-relation queries the response was YES. [2024-06-14 12:11:50,616 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. [2024-06-14 12:11:50,645 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 232 selfloop transitions, 136 changer transitions 0/371 dead transitions. [2024-06-14 12:11:50,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 371 transitions, 5923 flow [2024-06-14 12:11:50,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:11:50,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:11:50,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-06-14 12:11:50,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681818181818182 [2024-06-14 12:11:50,646 INFO L175 Difference]: Start difference. First operand has 225 places, 305 transitions, 3577 flow. Second operand 10 states and 206 transitions. [2024-06-14 12:11:50,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 371 transitions, 5923 flow [2024-06-14 12:11:51,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 371 transitions, 5590 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-06-14 12:11:51,291 INFO L231 Difference]: Finished difference. Result has 227 places, 317 transitions, 3923 flow [2024-06-14 12:11:51,291 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} [2024-06-14 12:11:51,292 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 182 predicate places. [2024-06-14 12:11:51,292 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 317 transitions, 3923 flow [2024-06-14 12:11:51,292 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) [2024-06-14 12:11:51,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:51,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:51,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 12:11:51,292 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)] === [2024-06-14 12:11:51,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:51,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1478926512, now seen corresponding path program 1 times [2024-06-14 12:11:51,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:51,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917640575] [2024-06-14 12:11:51,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:51,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:51,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:52,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:52,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:52,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917640575] [2024-06-14 12:11:52,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917640575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:52,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:52,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:11:52,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198999139] [2024-06-14 12:11:52,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:52,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:11:52,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:52,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:11:52,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:11:52,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:11:52,849 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) [2024-06-14 12:11:52,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:52,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:11:52,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:54,010 INFO L124 PetriNetUnfolderBase]: 3901/5713 cut-off events. [2024-06-14 12:11:54,010 INFO L125 PetriNetUnfolderBase]: For 734182/734188 co-relation queries the response was YES. [2024-06-14 12:11:54,053 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. [2024-06-14 12:11:54,083 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 281 selfloop transitions, 77 changer transitions 0/361 dead transitions. [2024-06-14 12:11:54,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 361 transitions, 5233 flow [2024-06-14 12:11:54,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:11:54,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:11:54,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-14 12:11:54,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 12:11:54,084 INFO L175 Difference]: Start difference. First operand has 227 places, 317 transitions, 3923 flow. Second operand 9 states and 176 transitions. [2024-06-14 12:11:54,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 361 transitions, 5233 flow [2024-06-14 12:11:54,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 361 transitions, 4892 flow, removed 81 selfloop flow, removed 5 redundant places. [2024-06-14 12:11:54,838 INFO L231 Difference]: Finished difference. Result has 231 places, 320 transitions, 3876 flow [2024-06-14 12:11:54,838 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} [2024-06-14 12:11:54,838 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 186 predicate places. [2024-06-14 12:11:54,838 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 320 transitions, 3876 flow [2024-06-14 12:11:54,838 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) [2024-06-14 12:11:54,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:54,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:54,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 12:11:54,839 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)] === [2024-06-14 12:11:54,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:54,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1478918576, now seen corresponding path program 5 times [2024-06-14 12:11:54,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:54,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053315779] [2024-06-14 12:11:54,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:54,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:54,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:55,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:55,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:55,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053315779] [2024-06-14 12:11:55,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053315779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:55,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:55,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:11:55,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967253319] [2024-06-14 12:11:55,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:55,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:11:55,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:55,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:11:55,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:11:56,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:11:56,012 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) [2024-06-14 12:11:56,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:56,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:11:56,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:57,070 INFO L124 PetriNetUnfolderBase]: 3905/5719 cut-off events. [2024-06-14 12:11:57,071 INFO L125 PetriNetUnfolderBase]: For 739870/739876 co-relation queries the response was YES. [2024-06-14 12:11:57,113 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. [2024-06-14 12:11:57,146 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 220 selfloop transitions, 152 changer transitions 0/375 dead transitions. [2024-06-14 12:11:57,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 375 transitions, 5722 flow [2024-06-14 12:11:57,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:11:57,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:11:57,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-14 12:11:57,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46136363636363636 [2024-06-14 12:11:57,147 INFO L175 Difference]: Start difference. First operand has 231 places, 320 transitions, 3876 flow. Second operand 10 states and 203 transitions. [2024-06-14 12:11:57,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 375 transitions, 5722 flow [2024-06-14 12:11:57,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 375 transitions, 5452 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-06-14 12:11:57,980 INFO L231 Difference]: Finished difference. Result has 234 places, 324 transitions, 4059 flow [2024-06-14 12:11:57,981 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} [2024-06-14 12:11:57,981 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 189 predicate places. [2024-06-14 12:11:57,981 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 324 transitions, 4059 flow [2024-06-14 12:11:57,981 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) [2024-06-14 12:11:57,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:57,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:57,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 12:11:57,982 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)] === [2024-06-14 12:11:57,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:57,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1478711031, now seen corresponding path program 3 times [2024-06-14 12:11:57,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:57,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836862982] [2024-06-14 12:11:57,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:57,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:57,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:59,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:59,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:59,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836862982] [2024-06-14 12:11:59,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836862982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:59,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:59,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:11:59,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864955912] [2024-06-14 12:11:59,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:59,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:11:59,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:59,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:11:59,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:11:59,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:11:59,428 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) [2024-06-14 12:11:59,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:59,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:11:59,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:00,578 INFO L124 PetriNetUnfolderBase]: 3722/5541 cut-off events. [2024-06-14 12:12:00,578 INFO L125 PetriNetUnfolderBase]: For 757389/757443 co-relation queries the response was YES. [2024-06-14 12:12:00,618 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. [2024-06-14 12:12:00,648 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 246 selfloop transitions, 56 changer transitions 0/364 dead transitions. [2024-06-14 12:12:00,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 364 transitions, 4893 flow [2024-06-14 12:12:00,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:12:00,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:12:00,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-14 12:12:00,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-14 12:12:00,649 INFO L175 Difference]: Start difference. First operand has 234 places, 324 transitions, 4059 flow. Second operand 10 states and 187 transitions. [2024-06-14 12:12:00,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 364 transitions, 4893 flow [2024-06-14 12:12:01,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 364 transitions, 4520 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-06-14 12:12:01,408 INFO L231 Difference]: Finished difference. Result has 237 places, 327 transitions, 3948 flow [2024-06-14 12:12:01,408 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} [2024-06-14 12:12:01,408 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 192 predicate places. [2024-06-14 12:12:01,409 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 327 transitions, 3948 flow [2024-06-14 12:12:01,409 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) [2024-06-14 12:12:01,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:01,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:12:01,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 12:12:01,409 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)] === [2024-06-14 12:12:01,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:01,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1478711186, now seen corresponding path program 6 times [2024-06-14 12:12:01,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:01,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758868404] [2024-06-14 12:12:01,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:01,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:01,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:02,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:12:02,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:02,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758868404] [2024-06-14 12:12:02,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758868404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:02,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:02,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:12:02,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510737482] [2024-06-14 12:12:02,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:02,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:12:02,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:02,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:12:02,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:12:02,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:12:02,586 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) [2024-06-14 12:12:02,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:02,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:12:02,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:03,735 INFO L124 PetriNetUnfolderBase]: 3904/5719 cut-off events. [2024-06-14 12:12:03,735 INFO L125 PetriNetUnfolderBase]: For 778275/778281 co-relation queries the response was YES. [2024-06-14 12:12:03,773 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. [2024-06-14 12:12:03,799 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 237 selfloop transitions, 138 changer transitions 0/378 dead transitions. [2024-06-14 12:12:03,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 378 transitions, 5704 flow [2024-06-14 12:12:03,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:12:03,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:12:03,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-14 12:12:03,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46136363636363636 [2024-06-14 12:12:03,801 INFO L175 Difference]: Start difference. First operand has 237 places, 327 transitions, 3948 flow. Second operand 10 states and 203 transitions. [2024-06-14 12:12:03,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 378 transitions, 5704 flow [2024-06-14 12:12:04,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 378 transitions, 5374 flow, removed 111 selfloop flow, removed 8 redundant places. [2024-06-14 12:12:04,817 INFO L231 Difference]: Finished difference. Result has 239 places, 327 transitions, 3904 flow [2024-06-14 12:12:04,817 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} [2024-06-14 12:12:04,817 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 194 predicate places. [2024-06-14 12:12:04,818 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 327 transitions, 3904 flow [2024-06-14 12:12:04,818 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) [2024-06-14 12:12:04,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:04,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:12:04,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 12:12:04,818 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)] === [2024-06-14 12:12:04,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:04,818 INFO L85 PathProgramCache]: Analyzing trace with hash 586493693, now seen corresponding path program 1 times [2024-06-14 12:12:04,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:04,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611309996] [2024-06-14 12:12:04,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:04,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:04,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:05,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:12:05,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:05,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611309996] [2024-06-14 12:12:05,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611309996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:05,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:05,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:12:05,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620686972] [2024-06-14 12:12:05,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:05,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:12:05,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:05,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:12:05,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:12:05,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:12:05,743 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) [2024-06-14 12:12:05,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:05,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:12:05,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:06,723 INFO L124 PetriNetUnfolderBase]: 3706/5504 cut-off events. [2024-06-14 12:12:06,723 INFO L125 PetriNetUnfolderBase]: For 784997/785013 co-relation queries the response was YES. [2024-06-14 12:12:06,764 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. [2024-06-14 12:12:06,794 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 305 selfloop transitions, 24 changer transitions 0/353 dead transitions. [2024-06-14 12:12:06,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 353 transitions, 4803 flow [2024-06-14 12:12:06,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:12:06,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:12:06,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-14 12:12:06,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 12:12:06,795 INFO L175 Difference]: Start difference. First operand has 239 places, 327 transitions, 3904 flow. Second operand 7 states and 132 transitions. [2024-06-14 12:12:06,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 353 transitions, 4803 flow [2024-06-14 12:12:07,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 353 transitions, 4507 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-14 12:12:07,655 INFO L231 Difference]: Finished difference. Result has 237 places, 330 transitions, 3717 flow [2024-06-14 12:12:07,655 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} [2024-06-14 12:12:07,655 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 192 predicate places. [2024-06-14 12:12:07,656 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 330 transitions, 3717 flow [2024-06-14 12:12:07,656 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) [2024-06-14 12:12:07,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:07,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:12:07,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 12:12:07,656 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)] === [2024-06-14 12:12:07,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:07,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1603671342, now seen corresponding path program 2 times [2024-06-14 12:12:07,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:07,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485051624] [2024-06-14 12:12:07,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:07,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:07,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:08,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:12:08,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:08,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485051624] [2024-06-14 12:12:08,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485051624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:08,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:08,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:12:08,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541305681] [2024-06-14 12:12:08,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:08,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:12:08,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:08,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:12:08,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:12:08,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:12:08,985 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) [2024-06-14 12:12:08,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:08,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:12:08,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:10,078 INFO L124 PetriNetUnfolderBase]: 3937/5770 cut-off events. [2024-06-14 12:12:10,079 INFO L125 PetriNetUnfolderBase]: For 820149/820155 co-relation queries the response was YES. [2024-06-14 12:12:10,121 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. [2024-06-14 12:12:10,151 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 286 selfloop transitions, 81 changer transitions 0/370 dead transitions. [2024-06-14 12:12:10,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 370 transitions, 4945 flow [2024-06-14 12:12:10,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:12:10,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:12:10,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-14 12:12:10,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43686868686868685 [2024-06-14 12:12:10,152 INFO L175 Difference]: Start difference. First operand has 237 places, 330 transitions, 3717 flow. Second operand 9 states and 173 transitions. [2024-06-14 12:12:10,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 370 transitions, 4945 flow [2024-06-14 12:12:11,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 370 transitions, 4877 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-14 12:12:11,043 INFO L231 Difference]: Finished difference. Result has 241 places, 333 transitions, 3961 flow [2024-06-14 12:12:11,044 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} [2024-06-14 12:12:11,044 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 196 predicate places. [2024-06-14 12:12:11,044 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 333 transitions, 3961 flow [2024-06-14 12:12:11,044 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) [2024-06-14 12:12:11,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:11,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:12:11,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 12:12:11,044 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)] === [2024-06-14 12:12:11,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:11,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1603680642, now seen corresponding path program 3 times [2024-06-14 12:12:11,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:11,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185564521] [2024-06-14 12:12:11,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:11,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:11,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:12,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:12:12,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:12,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185564521] [2024-06-14 12:12:12,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185564521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:12,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:12,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:12:12,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536747090] [2024-06-14 12:12:12,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:12,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:12:12,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:12,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:12:12,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:12:12,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:12:12,550 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) [2024-06-14 12:12:12,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:12,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:12:12,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:13,791 INFO L124 PetriNetUnfolderBase]: 4003/5872 cut-off events. [2024-06-14 12:12:13,791 INFO L125 PetriNetUnfolderBase]: For 868131/868137 co-relation queries the response was YES. [2024-06-14 12:12:13,832 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. [2024-06-14 12:12:13,862 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 283 selfloop transitions, 92 changer transitions 0/378 dead transitions. [2024-06-14 12:12:13,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 378 transitions, 5609 flow [2024-06-14 12:12:13,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:12:13,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:12:13,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-14 12:12:13,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44191919191919193 [2024-06-14 12:12:13,863 INFO L175 Difference]: Start difference. First operand has 241 places, 333 transitions, 3961 flow. Second operand 9 states and 175 transitions. [2024-06-14 12:12:13,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 378 transitions, 5609 flow [2024-06-14 12:12:14,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 378 transitions, 5321 flow, removed 65 selfloop flow, removed 7 redundant places. [2024-06-14 12:12:14,743 INFO L231 Difference]: Finished difference. Result has 243 places, 339 transitions, 4155 flow [2024-06-14 12:12:14,743 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} [2024-06-14 12:12:14,744 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 198 predicate places. [2024-06-14 12:12:14,744 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 339 transitions, 4155 flow [2024-06-14 12:12:14,744 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) [2024-06-14 12:12:14,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:14,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:12:14,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 12:12:14,744 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)] === [2024-06-14 12:12:14,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:14,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1036052576, now seen corresponding path program 4 times [2024-06-14 12:12:14,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:14,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179033163] [2024-06-14 12:12:14,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:14,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:14,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:15,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:12:15,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:15,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179033163] [2024-06-14 12:12:15,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179033163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:15,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:15,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:12:15,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866800926] [2024-06-14 12:12:15,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:15,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:12:15,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:15,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:12:15,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:12:16,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:12:16,018 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) [2024-06-14 12:12:16,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:16,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:12:16,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:17,174 INFO L124 PetriNetUnfolderBase]: 3993/5858 cut-off events. [2024-06-14 12:12:17,174 INFO L125 PetriNetUnfolderBase]: For 877266/877272 co-relation queries the response was YES. [2024-06-14 12:12:17,215 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. [2024-06-14 12:12:17,244 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 298 selfloop transitions, 76 changer transitions 0/377 dead transitions. [2024-06-14 12:12:17,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 377 transitions, 5405 flow [2024-06-14 12:12:17,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:12:17,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:12:17,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-14 12:12:17,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-14 12:12:17,245 INFO L175 Difference]: Start difference. First operand has 243 places, 339 transitions, 4155 flow. Second operand 9 states and 174 transitions. [2024-06-14 12:12:17,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 377 transitions, 5405 flow [2024-06-14 12:12:18,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 377 transitions, 5049 flow, removed 128 selfloop flow, removed 5 redundant places. [2024-06-14 12:12:18,301 INFO L231 Difference]: Finished difference. Result has 247 places, 339 transitions, 3959 flow [2024-06-14 12:12:18,302 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} [2024-06-14 12:12:18,302 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 202 predicate places. [2024-06-14 12:12:18,302 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 339 transitions, 3959 flow [2024-06-14 12:12:18,302 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) [2024-06-14 12:12:18,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:18,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:12:18,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 12:12:18,302 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)] === [2024-06-14 12:12:18,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:18,303 INFO L85 PathProgramCache]: Analyzing trace with hash -2003565828, now seen corresponding path program 7 times [2024-06-14 12:12:18,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:18,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061893313] [2024-06-14 12:12:18,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:18,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:18,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:19,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:12:19,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:19,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061893313] [2024-06-14 12:12:19,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061893313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:19,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:19,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:12:19,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545027549] [2024-06-14 12:12:19,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:19,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:12:19,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:19,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:12:19,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:12:19,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:12:19,491 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) [2024-06-14 12:12:19,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:19,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:12:19,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:20,788 INFO L124 PetriNetUnfolderBase]: 4133/6057 cut-off events. [2024-06-14 12:12:20,788 INFO L125 PetriNetUnfolderBase]: For 930219/930225 co-relation queries the response was YES. [2024-06-14 12:12:20,827 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. [2024-06-14 12:12:20,854 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 252 selfloop transitions, 147 changer transitions 0/402 dead transitions. [2024-06-14 12:12:20,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 402 transitions, 6548 flow [2024-06-14 12:12:20,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:12:20,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:12:20,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-14 12:12:20,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4636363636363636 [2024-06-14 12:12:20,855 INFO L175 Difference]: Start difference. First operand has 247 places, 339 transitions, 3959 flow. Second operand 10 states and 204 transitions. [2024-06-14 12:12:20,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 402 transitions, 6548 flow [2024-06-14 12:12:21,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 402 transitions, 6368 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-14 12:12:21,935 INFO L231 Difference]: Finished difference. Result has 251 places, 351 transitions, 4504 flow [2024-06-14 12:12:21,935 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} [2024-06-14 12:12:21,935 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 206 predicate places. [2024-06-14 12:12:21,935 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 351 transitions, 4504 flow [2024-06-14 12:12:21,935 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) [2024-06-14 12:12:21,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:21,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:12:21,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 12:12:21,936 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)] === [2024-06-14 12:12:21,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:21,936 INFO L85 PathProgramCache]: Analyzing trace with hash -2003364018, now seen corresponding path program 8 times [2024-06-14 12:12:21,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:21,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153844142] [2024-06-14 12:12:21,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:21,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:21,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:23,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:12:23,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:23,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153844142] [2024-06-14 12:12:23,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153844142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:23,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:23,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:12:23,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775760580] [2024-06-14 12:12:23,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:23,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:12:23,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:23,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:12:23,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:12:23,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:12:23,092 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) [2024-06-14 12:12:23,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:23,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:12:23,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:24,454 INFO L124 PetriNetUnfolderBase]: 4169/6109 cut-off events. [2024-06-14 12:12:24,455 INFO L125 PetriNetUnfolderBase]: For 970560/970566 co-relation queries the response was YES. [2024-06-14 12:12:24,495 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. [2024-06-14 12:12:24,524 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 250 selfloop transitions, 152 changer transitions 0/405 dead transitions. [2024-06-14 12:12:24,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 405 transitions, 6764 flow [2024-06-14 12:12:24,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:12:24,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:12:24,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-14 12:12:24,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4636363636363636 [2024-06-14 12:12:24,529 INFO L175 Difference]: Start difference. First operand has 251 places, 351 transitions, 4504 flow. Second operand 10 states and 204 transitions. [2024-06-14 12:12:24,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 405 transitions, 6764 flow [2024-06-14 12:12:25,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 405 transitions, 6375 flow, removed 91 selfloop flow, removed 5 redundant places. [2024-06-14 12:12:25,434 INFO L231 Difference]: Finished difference. Result has 256 places, 355 transitions, 4592 flow [2024-06-14 12:12:25,434 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} [2024-06-14 12:12:25,435 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 211 predicate places. [2024-06-14 12:12:25,435 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 355 transitions, 4592 flow [2024-06-14 12:12:25,435 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) [2024-06-14 12:12:25,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:25,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:12:25,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 12:12:25,435 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)] === [2024-06-14 12:12:25,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:25,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1756679586, now seen corresponding path program 9 times [2024-06-14 12:12:25,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:25,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619412027] [2024-06-14 12:12:25,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:25,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:25,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:26,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:12:26,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:26,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619412027] [2024-06-14 12:12:26,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619412027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:26,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:26,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:12:26,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976646846] [2024-06-14 12:12:26,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:26,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:12:26,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:26,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:12:26,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:12:26,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:12:26,609 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) [2024-06-14 12:12:26,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:26,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:12:26,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:27,862 INFO L124 PetriNetUnfolderBase]: 4173/6115 cut-off events. [2024-06-14 12:12:27,862 INFO L125 PetriNetUnfolderBase]: For 982915/982921 co-relation queries the response was YES. [2024-06-14 12:12:27,908 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. [2024-06-14 12:12:27,940 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 222 selfloop transitions, 181 changer transitions 0/406 dead transitions. [2024-06-14 12:12:27,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 406 transitions, 6495 flow [2024-06-14 12:12:27,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:12:27,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:12:27,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-14 12:12:27,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 12:12:27,941 INFO L175 Difference]: Start difference. First operand has 256 places, 355 transitions, 4592 flow. Second operand 10 states and 200 transitions. [2024-06-14 12:12:27,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 406 transitions, 6495 flow [2024-06-14 12:12:29,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 406 transitions, 6142 flow, removed 65 selfloop flow, removed 6 redundant places. [2024-06-14 12:12:29,095 INFO L231 Difference]: Finished difference. Result has 260 places, 359 transitions, 4773 flow [2024-06-14 12:12:29,095 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} [2024-06-14 12:12:29,095 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 215 predicate places. [2024-06-14 12:12:29,096 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 359 transitions, 4773 flow [2024-06-14 12:12:29,096 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) [2024-06-14 12:12:29,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:29,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:12:29,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 12:12:29,096 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)] === [2024-06-14 12:12:29,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:29,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1764036816, now seen corresponding path program 10 times [2024-06-14 12:12:29,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:29,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275954183] [2024-06-14 12:12:29,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:29,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:29,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:30,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:12:30,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:30,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275954183] [2024-06-14 12:12:30,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275954183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:30,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:30,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:12:30,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238318819] [2024-06-14 12:12:30,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:30,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:12:30,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:30,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:12:30,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:12:30,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:12:30,417 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) [2024-06-14 12:12:30,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:30,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:12:30,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:31,711 INFO L124 PetriNetUnfolderBase]: 4161/6099 cut-off events. [2024-06-14 12:12:31,711 INFO L125 PetriNetUnfolderBase]: For 992258/992264 co-relation queries the response was YES. [2024-06-14 12:12:31,757 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. [2024-06-14 12:12:31,786 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 251 selfloop transitions, 153 changer transitions 0/407 dead transitions. [2024-06-14 12:12:31,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 407 transitions, 6687 flow [2024-06-14 12:12:31,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:12:31,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:12:31,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 201 transitions. [2024-06-14 12:12:31,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45681818181818185 [2024-06-14 12:12:31,787 INFO L175 Difference]: Start difference. First operand has 260 places, 359 transitions, 4773 flow. Second operand 10 states and 201 transitions. [2024-06-14 12:12:31,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 407 transitions, 6687 flow [2024-06-14 12:12:32,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 407 transitions, 6174 flow, removed 117 selfloop flow, removed 7 redundant places. [2024-06-14 12:12:32,978 INFO L231 Difference]: Finished difference. Result has 263 places, 359 transitions, 4576 flow [2024-06-14 12:12:32,979 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} [2024-06-14 12:12:32,979 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 218 predicate places. [2024-06-14 12:12:32,979 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 359 transitions, 4576 flow [2024-06-14 12:12:32,979 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) [2024-06-14 12:12:32,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:32,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:12:32,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 12:12:32,979 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)] === [2024-06-14 12:12:32,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:32,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1764036971, now seen corresponding path program 4 times [2024-06-14 12:12:32,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:32,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883905298] [2024-06-14 12:12:32,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:32,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:32,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:34,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:12:34,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:34,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883905298] [2024-06-14 12:12:34,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883905298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:34,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:34,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:12:34,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701919591] [2024-06-14 12:12:34,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:34,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:12:34,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:34,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:12:34,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:12:34,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:12:34,306 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) [2024-06-14 12:12:34,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:34,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:12:34,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:35,481 INFO L124 PetriNetUnfolderBase]: 3969/5912 cut-off events. [2024-06-14 12:12:35,481 INFO L125 PetriNetUnfolderBase]: For 1000755/1000764 co-relation queries the response was YES. [2024-06-14 12:12:35,527 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. [2024-06-14 12:12:35,558 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 270 selfloop transitions, 55 changer transitions 0/396 dead transitions. [2024-06-14 12:12:35,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 396 transitions, 5468 flow [2024-06-14 12:12:35,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:12:35,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:12:35,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-14 12:12:35,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-06-14 12:12:35,560 INFO L175 Difference]: Start difference. First operand has 263 places, 359 transitions, 4576 flow. Second operand 10 states and 185 transitions. [2024-06-14 12:12:35,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 396 transitions, 5468 flow [2024-06-14 12:12:36,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 396 transitions, 5159 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-14 12:12:36,675 INFO L231 Difference]: Finished difference. Result has 265 places, 362 transitions, 4547 flow [2024-06-14 12:12:36,675 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} [2024-06-14 12:12:36,676 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 220 predicate places. [2024-06-14 12:12:36,676 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 362 transitions, 4547 flow [2024-06-14 12:12:36,676 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) [2024-06-14 12:12:36,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:36,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:12:36,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 12:12:36,676 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)] === [2024-06-14 12:12:36,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:36,676 INFO L85 PathProgramCache]: Analyzing trace with hash 193549579, now seen corresponding path program 2 times [2024-06-14 12:12:36,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:36,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863275456] [2024-06-14 12:12:36,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:36,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:36,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:37,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:12:37,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:37,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863275456] [2024-06-14 12:12:37,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863275456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:37,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:37,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:12:37,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642365126] [2024-06-14 12:12:37,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:37,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:12:37,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:37,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:12:37,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:12:37,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:12:37,654 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) [2024-06-14 12:12:37,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:37,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:12:37,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:38,752 INFO L124 PetriNetUnfolderBase]: 3968/5912 cut-off events. [2024-06-14 12:12:38,752 INFO L125 PetriNetUnfolderBase]: For 1035747/1035775 co-relation queries the response was YES. [2024-06-14 12:12:38,800 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. [2024-06-14 12:12:38,834 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 344 selfloop transitions, 28 changer transitions 0/396 dead transitions. [2024-06-14 12:12:38,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 396 transitions, 5768 flow [2024-06-14 12:12:38,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:12:38,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:12:38,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-14 12:12:38,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835227272727273 [2024-06-14 12:12:38,835 INFO L175 Difference]: Start difference. First operand has 265 places, 362 transitions, 4547 flow. Second operand 8 states and 135 transitions. [2024-06-14 12:12:38,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 396 transitions, 5768 flow [2024-06-14 12:12:40,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 396 transitions, 5502 flow, removed 75 selfloop flow, removed 8 redundant places. [2024-06-14 12:12:40,127 INFO L231 Difference]: Finished difference. Result has 268 places, 381 transitions, 4679 flow [2024-06-14 12:12:40,127 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} [2024-06-14 12:12:40,127 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 223 predicate places. [2024-06-14 12:12:40,128 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 381 transitions, 4679 flow [2024-06-14 12:12:40,128 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) [2024-06-14 12:12:40,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:40,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:12:40,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 12:12:40,128 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)] === [2024-06-14 12:12:40,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:40,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1257236427, now seen corresponding path program 1 times [2024-06-14 12:12:40,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:40,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374148083] [2024-06-14 12:12:40,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:40,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:40,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:40,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:12:40,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:40,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374148083] [2024-06-14 12:12:40,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374148083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:40,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:40,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:12:40,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181049570] [2024-06-14 12:12:40,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:40,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:12:40,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:40,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:12:40,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:12:41,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:12:41,092 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) [2024-06-14 12:12:41,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:41,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:12:41,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:42,328 INFO L124 PetriNetUnfolderBase]: 3766/5674 cut-off events. [2024-06-14 12:12:42,328 INFO L125 PetriNetUnfolderBase]: For 1066747/1066859 co-relation queries the response was YES. [2024-06-14 12:12:42,375 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. [2024-06-14 12:12:42,407 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 335 selfloop transitions, 35 changer transitions 0/419 dead transitions. [2024-06-14 12:12:42,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 419 transitions, 5820 flow [2024-06-14 12:12:42,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:12:42,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:12:42,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 12:12:42,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-14 12:12:42,408 INFO L175 Difference]: Start difference. First operand has 268 places, 381 transitions, 4679 flow. Second operand 8 states and 153 transitions. [2024-06-14 12:12:42,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 419 transitions, 5820 flow [2024-06-14 12:12:43,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 419 transitions, 5796 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-06-14 12:12:43,724 INFO L231 Difference]: Finished difference. Result has 279 places, 398 transitions, 4992 flow [2024-06-14 12:12:43,725 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} [2024-06-14 12:12:43,725 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 234 predicate places. [2024-06-14 12:12:43,725 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 398 transitions, 4992 flow [2024-06-14 12:12:43,725 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) [2024-06-14 12:12:43,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:43,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:12:43,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 12:12:43,725 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)] === [2024-06-14 12:12:43,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:43,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1940822325, now seen corresponding path program 3 times [2024-06-14 12:12:43,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:43,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344668155] [2024-06-14 12:12:43,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:43,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:43,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:44,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:12:44,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:44,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344668155] [2024-06-14 12:12:44,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344668155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:44,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:44,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:12:44,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696832540] [2024-06-14 12:12:44,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:44,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:12:44,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:44,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:12:44,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:12:44,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:12:44,611 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) [2024-06-14 12:12:44,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:44,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:12:44,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:45,928 INFO L124 PetriNetUnfolderBase]: 4009/5970 cut-off events. [2024-06-14 12:12:45,929 INFO L125 PetriNetUnfolderBase]: For 1076893/1076921 co-relation queries the response was YES. [2024-06-14 12:12:45,979 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. [2024-06-14 12:12:46,012 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 348 selfloop transitions, 57 changer transitions 0/429 dead transitions. [2024-06-14 12:12:46,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 429 transitions, 6178 flow [2024-06-14 12:12:46,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:12:46,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:12:46,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 12:12:46,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119318181818182 [2024-06-14 12:12:46,013 INFO L175 Difference]: Start difference. First operand has 279 places, 398 transitions, 4992 flow. Second operand 8 states and 145 transitions. [2024-06-14 12:12:46,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 429 transitions, 6178 flow [2024-06-14 12:12:47,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 429 transitions, 6115 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-14 12:12:47,604 INFO L231 Difference]: Finished difference. Result has 287 places, 410 transitions, 5269 flow [2024-06-14 12:12:47,605 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} [2024-06-14 12:12:47,605 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 242 predicate places. [2024-06-14 12:12:47,605 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 410 transitions, 5269 flow [2024-06-14 12:12:47,605 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) [2024-06-14 12:12:47,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:47,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:12:47,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 12:12:47,606 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)] === [2024-06-14 12:12:47,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:47,606 INFO L85 PathProgramCache]: Analyzing trace with hash 193550013, now seen corresponding path program 2 times [2024-06-14 12:12:47,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:47,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775346832] [2024-06-14 12:12:47,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:47,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:47,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:48,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:12:48,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:48,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775346832] [2024-06-14 12:12:48,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775346832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:48,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:48,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:12:48,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713331042] [2024-06-14 12:12:48,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:48,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:12:48,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:48,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:12:48,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:12:48,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:12:48,532 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) [2024-06-14 12:12:48,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:48,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:12:48,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:49,899 INFO L124 PetriNetUnfolderBase]: 3805/5727 cut-off events. [2024-06-14 12:12:49,900 INFO L125 PetriNetUnfolderBase]: For 1125297/1125384 co-relation queries the response was YES. [2024-06-14 12:12:49,949 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. [2024-06-14 12:12:49,987 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 349 selfloop transitions, 38 changer transitions 0/440 dead transitions. [2024-06-14 12:12:49,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 440 transitions, 6439 flow [2024-06-14 12:12:49,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:12:49,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:12:49,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 12:12:49,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4147727272727273 [2024-06-14 12:12:49,988 INFO L175 Difference]: Start difference. First operand has 287 places, 410 transitions, 5269 flow. Second operand 8 states and 146 transitions. [2024-06-14 12:12:49,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 440 transitions, 6439 flow [2024-06-14 12:12:51,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 440 transitions, 6353 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-14 12:12:51,295 INFO L231 Difference]: Finished difference. Result has 292 places, 423 transitions, 5494 flow [2024-06-14 12:12:51,296 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} [2024-06-14 12:12:51,296 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 247 predicate places. [2024-06-14 12:12:51,296 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 423 transitions, 5494 flow [2024-06-14 12:12:51,296 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) [2024-06-14 12:12:51,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:51,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:12:51,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 12:12:51,297 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)] === [2024-06-14 12:12:51,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:51,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1007441716, now seen corresponding path program 5 times [2024-06-14 12:12:51,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:51,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572850574] [2024-06-14 12:12:51,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:51,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:51,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:52,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:12:52,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:52,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572850574] [2024-06-14 12:12:52,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572850574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:52,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:52,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:12:52,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67974691] [2024-06-14 12:12:52,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:52,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:12:52,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:52,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:12:52,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:12:52,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:12:52,692 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) [2024-06-14 12:12:52,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:52,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:12:52,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:54,361 INFO L124 PetriNetUnfolderBase]: 4334/6366 cut-off events. [2024-06-14 12:12:54,361 INFO L125 PetriNetUnfolderBase]: For 1157052/1157052 co-relation queries the response was YES. [2024-06-14 12:12:54,409 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. [2024-06-14 12:12:54,442 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 407 selfloop transitions, 47 changer transitions 0/457 dead transitions. [2024-06-14 12:12:54,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 457 transitions, 6820 flow [2024-06-14 12:12:54,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:12:54,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:12:54,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-14 12:12:54,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41414141414141414 [2024-06-14 12:12:54,443 INFO L175 Difference]: Start difference. First operand has 292 places, 423 transitions, 5494 flow. Second operand 9 states and 164 transitions. [2024-06-14 12:12:54,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 457 transitions, 6820 flow [2024-06-14 12:12:55,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 457 transitions, 6716 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-14 12:12:55,618 INFO L231 Difference]: Finished difference. Result has 297 places, 426 transitions, 5656 flow [2024-06-14 12:12:55,619 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} [2024-06-14 12:12:55,619 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 252 predicate places. [2024-06-14 12:12:55,619 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 426 transitions, 5656 flow [2024-06-14 12:12:55,619 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) [2024-06-14 12:12:55,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:55,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:12:55,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 12:12:55,620 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)] === [2024-06-14 12:12:55,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:55,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1007432416, now seen corresponding path program 6 times [2024-06-14 12:12:55,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:55,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167027497] [2024-06-14 12:12:55,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:55,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:55,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:56,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:12:56,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:56,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167027497] [2024-06-14 12:12:56,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167027497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:56,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:56,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:12:56,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26992142] [2024-06-14 12:12:56,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:56,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:12:56,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:56,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:12:56,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:12:57,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:12:57,043 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) [2024-06-14 12:12:57,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:57,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:12:57,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:58,587 INFO L124 PetriNetUnfolderBase]: 4400/6468 cut-off events. [2024-06-14 12:12:58,587 INFO L125 PetriNetUnfolderBase]: For 1215899/1215899 co-relation queries the response was YES. [2024-06-14 12:12:58,639 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. [2024-06-14 12:12:58,673 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 407 selfloop transitions, 55 changer transitions 0/465 dead transitions. [2024-06-14 12:12:58,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 465 transitions, 7462 flow [2024-06-14 12:12:58,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:12:58,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:12:58,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-14 12:12:58,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41919191919191917 [2024-06-14 12:12:58,674 INFO L175 Difference]: Start difference. First operand has 297 places, 426 transitions, 5656 flow. Second operand 9 states and 166 transitions. [2024-06-14 12:12:58,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 465 transitions, 7462 flow [2024-06-14 12:13:00,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 465 transitions, 7220 flow, removed 76 selfloop flow, removed 7 redundant places. [2024-06-14 12:13:00,082 INFO L231 Difference]: Finished difference. Result has 299 places, 432 transitions, 5866 flow [2024-06-14 12:13:00,083 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} [2024-06-14 12:13:00,083 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 254 predicate places. [2024-06-14 12:13:00,083 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 432 transitions, 5866 flow [2024-06-14 12:13:00,083 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) [2024-06-14 12:13:00,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:00,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:00,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 12:13:00,083 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)] === [2024-06-14 12:13:00,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:00,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1007709122, now seen corresponding path program 11 times [2024-06-14 12:13:00,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:00,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258220376] [2024-06-14 12:13:00,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:00,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:00,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:01,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:01,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:01,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258220376] [2024-06-14 12:13:01,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258220376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:01,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:01,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:13:01,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593588863] [2024-06-14 12:13:01,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:01,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:13:01,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:01,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:13:01,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:13:01,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:13:01,276 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) [2024-06-14 12:13:01,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:01,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:13:01,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:02,798 INFO L124 PetriNetUnfolderBase]: 4484/6588 cut-off events. [2024-06-14 12:13:02,798 INFO L125 PetriNetUnfolderBase]: For 1273024/1273024 co-relation queries the response was YES. [2024-06-14 12:13:02,850 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. [2024-06-14 12:13:02,884 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 408 selfloop transitions, 70 changer transitions 0/481 dead transitions. [2024-06-14 12:13:02,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 481 transitions, 8034 flow [2024-06-14 12:13:02,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:13:02,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:13:02,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-14 12:13:02,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42954545454545456 [2024-06-14 12:13:02,885 INFO L175 Difference]: Start difference. First operand has 299 places, 432 transitions, 5866 flow. Second operand 10 states and 189 transitions. [2024-06-14 12:13:02,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 481 transitions, 8034 flow [2024-06-14 12:13:04,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 481 transitions, 7781 flow, removed 98 selfloop flow, removed 5 redundant places. [2024-06-14 12:13:04,439 INFO L231 Difference]: Finished difference. Result has 306 places, 441 transitions, 6207 flow [2024-06-14 12:13:04,439 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} [2024-06-14 12:13:04,439 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 261 predicate places. [2024-06-14 12:13:04,439 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 441 transitions, 6207 flow [2024-06-14 12:13:04,439 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) [2024-06-14 12:13:04,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:04,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:04,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 12:13:04,440 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)] === [2024-06-14 12:13:04,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:04,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1020102578, now seen corresponding path program 7 times [2024-06-14 12:13:04,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:04,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601661769] [2024-06-14 12:13:04,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:04,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:04,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:05,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:05,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:05,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601661769] [2024-06-14 12:13:05,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601661769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:05,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:05,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:13:05,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441556735] [2024-06-14 12:13:05,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:05,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:13:05,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:05,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:13:05,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:13:05,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:13:05,721 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) [2024-06-14 12:13:05,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:05,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:13:05,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:07,425 INFO L124 PetriNetUnfolderBase]: 4474/6574 cut-off events. [2024-06-14 12:13:07,426 INFO L125 PetriNetUnfolderBase]: For 1284411/1284411 co-relation queries the response was YES. [2024-06-14 12:13:07,486 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. [2024-06-14 12:13:07,522 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 424 selfloop transitions, 46 changer transitions 0/473 dead transitions. [2024-06-14 12:13:07,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 473 transitions, 7575 flow [2024-06-14 12:13:07,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:13:07,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:13:07,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-14 12:13:07,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41414141414141414 [2024-06-14 12:13:07,524 INFO L175 Difference]: Start difference. First operand has 306 places, 441 transitions, 6207 flow. Second operand 9 states and 164 transitions. [2024-06-14 12:13:07,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 473 transitions, 7575 flow [2024-06-14 12:13:09,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 473 transitions, 7000 flow, removed 151 selfloop flow, removed 9 redundant places. [2024-06-14 12:13:09,406 INFO L231 Difference]: Finished difference. Result has 306 places, 441 transitions, 5732 flow [2024-06-14 12:13:09,407 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} [2024-06-14 12:13:09,407 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 261 predicate places. [2024-06-14 12:13:09,407 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 441 transitions, 5732 flow [2024-06-14 12:13:09,407 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) [2024-06-14 12:13:09,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:09,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:09,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 12:13:09,407 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)] === [2024-06-14 12:13:09,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:09,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1020312324, now seen corresponding path program 12 times [2024-06-14 12:13:09,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:09,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671260468] [2024-06-14 12:13:09,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:09,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:09,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:10,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:10,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:10,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671260468] [2024-06-14 12:13:10,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671260468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:10,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:10,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:13:10,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749205538] [2024-06-14 12:13:10,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:10,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:13:10,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:10,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:13:10,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:13:10,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:13:10,551 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) [2024-06-14 12:13:10,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:10,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:13:10,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:12,244 INFO L124 PetriNetUnfolderBase]: 4558/6694 cut-off events. [2024-06-14 12:13:12,244 INFO L125 PetriNetUnfolderBase]: For 1320344/1320344 co-relation queries the response was YES. [2024-06-14 12:13:12,297 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. [2024-06-14 12:13:12,328 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 414 selfloop transitions, 74 changer transitions 0/491 dead transitions. [2024-06-14 12:13:12,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 491 transitions, 8188 flow [2024-06-14 12:13:12,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:13:12,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:13:12,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-14 12:13:12,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42954545454545456 [2024-06-14 12:13:12,330 INFO L175 Difference]: Start difference. First operand has 306 places, 441 transitions, 5732 flow. Second operand 10 states and 189 transitions. [2024-06-14 12:13:12,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 491 transitions, 8188 flow [2024-06-14 12:13:13,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 491 transitions, 8078 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-14 12:13:13,770 INFO L231 Difference]: Finished difference. Result has 308 places, 449 transitions, 6079 flow [2024-06-14 12:13:13,771 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} [2024-06-14 12:13:13,771 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 263 predicate places. [2024-06-14 12:13:13,771 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 449 transitions, 6079 flow [2024-06-14 12:13:13,771 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) [2024-06-14 12:13:13,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:13,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:13,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 12:13:13,772 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)] === [2024-06-14 12:13:13,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:13,772 INFO L85 PathProgramCache]: Analyzing trace with hash -2030330478, now seen corresponding path program 13 times [2024-06-14 12:13:13,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:13,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326784127] [2024-06-14 12:13:13,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:13,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:13,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:14,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:14,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:14,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326784127] [2024-06-14 12:13:14,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326784127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:14,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:14,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:13:14,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095570955] [2024-06-14 12:13:14,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:14,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:13:14,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:14,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:13:14,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:13:14,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:13:14,882 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) [2024-06-14 12:13:14,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:14,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:13:14,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:16,382 INFO L124 PetriNetUnfolderBase]: 4546/6678 cut-off events. [2024-06-14 12:13:16,382 INFO L125 PetriNetUnfolderBase]: For 1338322/1338322 co-relation queries the response was YES. [2024-06-14 12:13:16,444 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. [2024-06-14 12:13:16,481 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 412 selfloop transitions, 75 changer transitions 0/490 dead transitions. [2024-06-14 12:13:16,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 490 transitions, 8103 flow [2024-06-14 12:13:16,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:13:16,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:13:16,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-14 12:13:16,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-14 12:13:16,482 INFO L175 Difference]: Start difference. First operand has 308 places, 449 transitions, 6079 flow. Second operand 10 states and 187 transitions. [2024-06-14 12:13:16,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 490 transitions, 8103 flow [2024-06-14 12:13:18,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 490 transitions, 7558 flow, removed 120 selfloop flow, removed 8 redundant places. [2024-06-14 12:13:18,428 INFO L231 Difference]: Finished difference. Result has 310 places, 449 transitions, 5694 flow [2024-06-14 12:13:18,428 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} [2024-06-14 12:13:18,428 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 265 predicate places. [2024-06-14 12:13:18,428 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 449 transitions, 5694 flow [2024-06-14 12:13:18,428 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) [2024-06-14 12:13:18,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:18,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:18,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 12:13:18,429 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)] === [2024-06-14 12:13:18,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:18,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1015066507, now seen corresponding path program 5 times [2024-06-14 12:13:18,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:18,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245082737] [2024-06-14 12:13:18,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:18,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:18,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:19,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:19,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:19,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245082737] [2024-06-14 12:13:19,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245082737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:19,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:19,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:13:19,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599024478] [2024-06-14 12:13:19,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:19,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:13:19,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:19,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:13:19,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:13:19,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:13:19,812 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) [2024-06-14 12:13:19,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:19,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:13:19,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:21,367 INFO L124 PetriNetUnfolderBase]: 4361/6488 cut-off events. [2024-06-14 12:13:21,368 INFO L125 PetriNetUnfolderBase]: For 1360047/1360079 co-relation queries the response was YES. [2024-06-14 12:13:21,430 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. [2024-06-14 12:13:21,468 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 373 selfloop transitions, 24 changer transitions 0/482 dead transitions. [2024-06-14 12:13:21,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 482 transitions, 6762 flow [2024-06-14 12:13:21,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:13:21,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:13:21,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-14 12:13:21,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39545454545454545 [2024-06-14 12:13:21,469 INFO L175 Difference]: Start difference. First operand has 310 places, 449 transitions, 5694 flow. Second operand 10 states and 174 transitions. [2024-06-14 12:13:21,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 482 transitions, 6762 flow [2024-06-14 12:13:23,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 482 transitions, 6581 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-14 12:13:23,388 INFO L231 Difference]: Finished difference. Result has 311 places, 452 transitions, 5745 flow [2024-06-14 12:13:23,388 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} [2024-06-14 12:13:23,389 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 266 predicate places. [2024-06-14 12:13:23,389 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 452 transitions, 5745 flow [2024-06-14 12:13:23,389 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) [2024-06-14 12:13:23,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:23,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:23,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 12:13:23,390 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)] === [2024-06-14 12:13:23,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:23,390 INFO L85 PathProgramCache]: Analyzing trace with hash -317979407, now seen corresponding path program 1 times [2024-06-14 12:13:23,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:23,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046456207] [2024-06-14 12:13:23,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:23,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:23,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:24,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:24,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:24,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046456207] [2024-06-14 12:13:24,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046456207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:24,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:24,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:13:24,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141148356] [2024-06-14 12:13:24,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:24,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:13:24,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:24,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:13:24,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:13:24,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:13:24,463 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) [2024-06-14 12:13:24,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:24,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:13:24,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:26,079 INFO L124 PetriNetUnfolderBase]: 4283/6383 cut-off events. [2024-06-14 12:13:26,079 INFO L125 PetriNetUnfolderBase]: For 1376943/1376979 co-relation queries the response was YES. [2024-06-14 12:13:26,139 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. [2024-06-14 12:13:26,174 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 392 selfloop transitions, 70 changer transitions 0/486 dead transitions. [2024-06-14 12:13:26,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 486 transitions, 7249 flow [2024-06-14 12:13:26,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:13:26,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:13:26,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-14 12:13:26,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41919191919191917 [2024-06-14 12:13:26,176 INFO L175 Difference]: Start difference. First operand has 311 places, 452 transitions, 5745 flow. Second operand 9 states and 166 transitions. [2024-06-14 12:13:26,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 486 transitions, 7249 flow [2024-06-14 12:13:27,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 486 transitions, 7041 flow, removed 82 selfloop flow, removed 8 redundant places. [2024-06-14 12:13:27,885 INFO L231 Difference]: Finished difference. Result has 313 places, 461 transitions, 5884 flow [2024-06-14 12:13:27,885 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} [2024-06-14 12:13:27,885 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 268 predicate places. [2024-06-14 12:13:27,885 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 461 transitions, 5884 flow [2024-06-14 12:13:27,886 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) [2024-06-14 12:13:27,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:27,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:27,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 12:13:27,886 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)] === [2024-06-14 12:13:27,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:27,886 INFO L85 PathProgramCache]: Analyzing trace with hash -434529918, now seen corresponding path program 8 times [2024-06-14 12:13:27,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:27,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130599117] [2024-06-14 12:13:27,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:27,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:27,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:28,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:28,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:28,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130599117] [2024-06-14 12:13:28,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130599117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:28,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:28,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:13:28,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619966350] [2024-06-14 12:13:28,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:28,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:13:28,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:28,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:13:28,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:13:29,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:13:29,096 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) [2024-06-14 12:13:29,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:29,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:13:29,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:30,673 INFO L124 PetriNetUnfolderBase]: 4605/6764 cut-off events. [2024-06-14 12:13:30,674 INFO L125 PetriNetUnfolderBase]: For 1429470/1429470 co-relation queries the response was YES. [2024-06-14 12:13:30,734 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. [2024-06-14 12:13:30,769 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 455 selfloop transitions, 35 changer transitions 0/493 dead transitions. [2024-06-14 12:13:30,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 493 transitions, 7138 flow [2024-06-14 12:13:30,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:13:30,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:13:30,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-14 12:13:30,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4015151515151515 [2024-06-14 12:13:30,771 INFO L175 Difference]: Start difference. First operand has 313 places, 461 transitions, 5884 flow. Second operand 9 states and 159 transitions. [2024-06-14 12:13:30,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 493 transitions, 7138 flow [2024-06-14 12:13:32,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 493 transitions, 7019 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-14 12:13:32,612 INFO L231 Difference]: Finished difference. Result has 318 places, 464 transitions, 6027 flow [2024-06-14 12:13:32,612 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} [2024-06-14 12:13:32,612 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 273 predicate places. [2024-06-14 12:13:32,612 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 464 transitions, 6027 flow [2024-06-14 12:13:32,613 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) [2024-06-14 12:13:32,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:32,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:32,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 12:13:32,613 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)] === [2024-06-14 12:13:32,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:32,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1295182288, now seen corresponding path program 14 times [2024-06-14 12:13:32,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:32,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604017337] [2024-06-14 12:13:32,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:32,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:32,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:33,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:33,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:33,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604017337] [2024-06-14 12:13:33,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604017337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:33,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:33,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:13:33,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720492961] [2024-06-14 12:13:33,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:33,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:13:33,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:33,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:13:33,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:13:33,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:13:33,815 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) [2024-06-14 12:13:33,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:33,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:13:33,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:35,340 INFO L124 PetriNetUnfolderBase]: 4593/6748 cut-off events. [2024-06-14 12:13:35,340 INFO L125 PetriNetUnfolderBase]: For 1433697/1433697 co-relation queries the response was YES. [2024-06-14 12:13:35,403 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. [2024-06-14 12:13:35,440 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 425 selfloop transitions, 75 changer transitions 0/503 dead transitions. [2024-06-14 12:13:35,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 503 transitions, 7771 flow [2024-06-14 12:13:35,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:13:35,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:13:35,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-14 12:13:35,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-14 12:13:35,441 INFO L175 Difference]: Start difference. First operand has 318 places, 464 transitions, 6027 flow. Second operand 10 states and 187 transitions. [2024-06-14 12:13:35,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 503 transitions, 7771 flow [2024-06-14 12:13:37,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 503 transitions, 7425 flow, removed 140 selfloop flow, removed 7 redundant places. [2024-06-14 12:13:37,687 INFO L231 Difference]: Finished difference. Result has 321 places, 464 transitions, 5840 flow [2024-06-14 12:13:37,687 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} [2024-06-14 12:13:37,687 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 276 predicate places. [2024-06-14 12:13:37,687 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 464 transitions, 5840 flow [2024-06-14 12:13:37,688 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) [2024-06-14 12:13:37,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:37,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:37,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 12:13:37,688 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)] === [2024-06-14 12:13:37,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:37,688 INFO L85 PathProgramCache]: Analyzing trace with hash -445571808, now seen corresponding path program 9 times [2024-06-14 12:13:37,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:37,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642528250] [2024-06-14 12:13:37,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:37,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:37,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:38,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:38,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:38,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642528250] [2024-06-14 12:13:38,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642528250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:38,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:38,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:13:38,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4759198] [2024-06-14 12:13:38,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:38,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:13:38,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:38,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:13:38,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:13:38,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:13:38,907 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) [2024-06-14 12:13:38,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:38,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:13:38,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:40,528 INFO L124 PetriNetUnfolderBase]: 4631/6806 cut-off events. [2024-06-14 12:13:40,529 INFO L125 PetriNetUnfolderBase]: For 1475671/1475671 co-relation queries the response was YES. [2024-06-14 12:13:40,593 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. [2024-06-14 12:13:40,629 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 446 selfloop transitions, 52 changer transitions 0/501 dead transitions. [2024-06-14 12:13:40,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 501 transitions, 7630 flow [2024-06-14 12:13:40,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:13:40,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:13:40,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-14 12:13:40,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41414141414141414 [2024-06-14 12:13:40,630 INFO L175 Difference]: Start difference. First operand has 321 places, 464 transitions, 5840 flow. Second operand 9 states and 164 transitions. [2024-06-14 12:13:40,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 501 transitions, 7630 flow [2024-06-14 12:13:42,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 501 transitions, 7475 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-14 12:13:42,830 INFO L231 Difference]: Finished difference. Result has 322 places, 470 transitions, 6172 flow [2024-06-14 12:13:42,830 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} [2024-06-14 12:13:42,830 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 277 predicate places. [2024-06-14 12:13:42,831 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 470 transitions, 6172 flow [2024-06-14 12:13:42,831 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) [2024-06-14 12:13:42,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:42,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:42,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 12:13:42,831 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)] === [2024-06-14 12:13:42,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:42,832 INFO L85 PathProgramCache]: Analyzing trace with hash -450832939, now seen corresponding path program 1 times [2024-06-14 12:13:42,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:42,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996100607] [2024-06-14 12:13:42,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:42,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:42,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:43,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:43,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:43,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996100607] [2024-06-14 12:13:43,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996100607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:43,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:43,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:13:43,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620036678] [2024-06-14 12:13:43,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:43,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:13:43,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:43,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:13:43,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:13:43,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:13:43,997 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) [2024-06-14 12:13:43,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:43,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:13:43,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:45,655 INFO L124 PetriNetUnfolderBase]: 4631/6806 cut-off events. [2024-06-14 12:13:45,656 INFO L125 PetriNetUnfolderBase]: For 1503393/1503393 co-relation queries the response was YES. [2024-06-14 12:13:45,723 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. [2024-06-14 12:13:45,760 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 450 selfloop transitions, 50 changer transitions 0/503 dead transitions. [2024-06-14 12:13:45,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 503 transitions, 7460 flow [2024-06-14 12:13:45,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:13:45,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:13:45,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 12:13:45,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-14 12:13:45,761 INFO L175 Difference]: Start difference. First operand has 322 places, 470 transitions, 6172 flow. Second operand 9 states and 162 transitions. [2024-06-14 12:13:45,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 503 transitions, 7460 flow [2024-06-14 12:13:48,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 503 transitions, 7184 flow, removed 113 selfloop flow, removed 5 redundant places. [2024-06-14 12:13:48,172 INFO L231 Difference]: Finished difference. Result has 326 places, 474 transitions, 6204 flow [2024-06-14 12:13:48,173 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} [2024-06-14 12:13:48,173 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 281 predicate places. [2024-06-14 12:13:48,173 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 474 transitions, 6204 flow [2024-06-14 12:13:48,173 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) [2024-06-14 12:13:48,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:48,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:48,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 12:13:48,173 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)] === [2024-06-14 12:13:48,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:48,174 INFO L85 PathProgramCache]: Analyzing trace with hash -450832660, now seen corresponding path program 10 times [2024-06-14 12:13:48,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:48,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267917183] [2024-06-14 12:13:48,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:48,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:48,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:49,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:49,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:49,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267917183] [2024-06-14 12:13:49,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267917183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:49,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:49,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:13:49,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899453440] [2024-06-14 12:13:49,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:49,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:13:49,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:49,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:13:49,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:13:49,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:13:49,408 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) [2024-06-14 12:13:49,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:49,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:13:49,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:51,075 INFO L124 PetriNetUnfolderBase]: 4618/6787 cut-off events. [2024-06-14 12:13:51,075 INFO L125 PetriNetUnfolderBase]: For 1504420/1504420 co-relation queries the response was YES. [2024-06-14 12:13:51,136 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. [2024-06-14 12:13:51,171 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 455 selfloop transitions, 45 changer transitions 0/503 dead transitions. [2024-06-14 12:13:51,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 503 transitions, 7304 flow [2024-06-14 12:13:51,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:13:51,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:13:51,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-14 12:13:51,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065656565656566 [2024-06-14 12:13:51,173 INFO L175 Difference]: Start difference. First operand has 326 places, 474 transitions, 6204 flow. Second operand 9 states and 161 transitions. [2024-06-14 12:13:51,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 503 transitions, 7304 flow [2024-06-14 12:13:53,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 503 transitions, 6924 flow, removed 145 selfloop flow, removed 7 redundant places. [2024-06-14 12:13:53,456 INFO L231 Difference]: Finished difference. Result has 328 places, 474 transitions, 5923 flow [2024-06-14 12:13:53,456 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} [2024-06-14 12:13:53,456 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 283 predicate places. [2024-06-14 12:13:53,457 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 474 transitions, 5923 flow [2024-06-14 12:13:53,457 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) [2024-06-14 12:13:53,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:53,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:53,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 12:13:53,457 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)] === [2024-06-14 12:13:53,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:53,457 INFO L85 PathProgramCache]: Analyzing trace with hash -764799296, now seen corresponding path program 15 times [2024-06-14 12:13:53,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:53,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879583746] [2024-06-14 12:13:53,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:53,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:53,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:54,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:54,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:54,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879583746] [2024-06-14 12:13:54,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879583746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:54,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:54,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:13:54,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257982357] [2024-06-14 12:13:54,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:54,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:13:54,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:54,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:13:54,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:13:54,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:13:54,537 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) [2024-06-14 12:13:54,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:54,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:13:54,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:56,267 INFO L124 PetriNetUnfolderBase]: 4618/6787 cut-off events. [2024-06-14 12:13:56,267 INFO L125 PetriNetUnfolderBase]: For 1521694/1521694 co-relation queries the response was YES. [2024-06-14 12:13:56,327 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. [2024-06-14 12:13:56,361 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 472 selfloop transitions, 37 changer transitions 0/512 dead transitions. [2024-06-14 12:13:56,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 512 transitions, 7235 flow [2024-06-14 12:13:56,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:13:56,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:13:56,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-14 12:13:56,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4022727272727273 [2024-06-14 12:13:56,362 INFO L175 Difference]: Start difference. First operand has 328 places, 474 transitions, 5923 flow. Second operand 10 states and 177 transitions. [2024-06-14 12:13:56,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 512 transitions, 7235 flow [2024-06-14 12:13:58,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 512 transitions, 7133 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 12:13:58,571 INFO L231 Difference]: Finished difference. Result has 330 places, 478 transitions, 6086 flow [2024-06-14 12:13:58,571 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} [2024-06-14 12:13:58,572 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 285 predicate places. [2024-06-14 12:13:58,572 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 478 transitions, 6086 flow [2024-06-14 12:13:58,572 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) [2024-06-14 12:13:58,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:58,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:13:58,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 12:13:58,572 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)] === [2024-06-14 12:13:58,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:58,572 INFO L85 PathProgramCache]: Analyzing trace with hash -2143136663, now seen corresponding path program 4 times [2024-06-14 12:13:58,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:58,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002446817] [2024-06-14 12:13:58,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:58,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:58,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:59,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:13:59,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:59,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002446817] [2024-06-14 12:13:59,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002446817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:59,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:59,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:13:59,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560883483] [2024-06-14 12:13:59,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:59,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:13:59,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:59,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:13:59,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:13:59,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:13:59,535 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) [2024-06-14 12:13:59,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:59,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:13:59,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:01,138 INFO L124 PetriNetUnfolderBase]: 4323/6449 cut-off events. [2024-06-14 12:14:01,138 INFO L125 PetriNetUnfolderBase]: For 1537090/1537126 co-relation queries the response was YES. [2024-06-14 12:14:01,189 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. [2024-06-14 12:14:01,218 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 446 selfloop transitions, 16 changer transitions 0/487 dead transitions. [2024-06-14 12:14:01,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 487 transitions, 7036 flow [2024-06-14 12:14:01,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:14:01,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:14:01,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-14 12:14:01,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35795454545454547 [2024-06-14 12:14:01,219 INFO L175 Difference]: Start difference. First operand has 330 places, 478 transitions, 6086 flow. Second operand 8 states and 126 transitions. [2024-06-14 12:14:01,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 487 transitions, 7036 flow [2024-06-14 12:14:03,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 487 transitions, 6803 flow, removed 82 selfloop flow, removed 8 redundant places. [2024-06-14 12:14:03,304 INFO L231 Difference]: Finished difference. Result has 330 places, 478 transitions, 5891 flow [2024-06-14 12:14:03,304 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} [2024-06-14 12:14:03,305 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 285 predicate places. [2024-06-14 12:14:03,305 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 478 transitions, 5891 flow [2024-06-14 12:14:03,305 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) [2024-06-14 12:14:03,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:03,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:03,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 12:14:03,305 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)] === [2024-06-14 12:14:03,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:03,306 INFO L85 PathProgramCache]: Analyzing trace with hash 607332123, now seen corresponding path program 3 times [2024-06-14 12:14:03,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:03,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273962012] [2024-06-14 12:14:03,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:03,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:03,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:04,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:04,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:04,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273962012] [2024-06-14 12:14:04,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273962012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:04,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:04,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:14:04,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964933848] [2024-06-14 12:14:04,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:04,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:14:04,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:04,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:14:04,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:14:04,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:14:04,135 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) [2024-06-14 12:14:04,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:04,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:14:04,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:05,479 INFO L124 PetriNetUnfolderBase]: 4090/6156 cut-off events. [2024-06-14 12:14:05,479 INFO L125 PetriNetUnfolderBase]: For 1583128/1583231 co-relation queries the response was YES. [2024-06-14 12:14:05,540 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. [2024-06-14 12:14:05,576 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 414 selfloop transitions, 17 changer transitions 0/494 dead transitions. [2024-06-14 12:14:05,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 494 transitions, 6895 flow [2024-06-14 12:14:05,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:14:05,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:14:05,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-14 12:14:05,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025974025974026 [2024-06-14 12:14:05,577 INFO L175 Difference]: Start difference. First operand has 330 places, 478 transitions, 5891 flow. Second operand 7 states and 124 transitions. [2024-06-14 12:14:05,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 494 transitions, 6895 flow [2024-06-14 12:14:07,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 494 transitions, 6818 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-14 12:14:07,907 INFO L231 Difference]: Finished difference. Result has 329 places, 483 transitions, 5972 flow [2024-06-14 12:14:07,907 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} [2024-06-14 12:14:07,908 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 284 predicate places. [2024-06-14 12:14:07,908 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 483 transitions, 5972 flow [2024-06-14 12:14:07,908 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) [2024-06-14 12:14:07,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:07,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:07,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 12:14:07,909 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)] === [2024-06-14 12:14:07,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:07,909 INFO L85 PathProgramCache]: Analyzing trace with hash 606856893, now seen corresponding path program 4 times [2024-06-14 12:14:07,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:07,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841837851] [2024-06-14 12:14:07,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:07,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:07,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:08,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:08,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:08,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841837851] [2024-06-14 12:14:08,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841837851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:08,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:08,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:14:08,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490286477] [2024-06-14 12:14:08,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:08,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:14:08,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:08,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:14:08,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:14:08,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 12:14:08,845 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) [2024-06-14 12:14:08,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:08,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 12:14:08,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:10,232 INFO L124 PetriNetUnfolderBase]: 4081/6144 cut-off events. [2024-06-14 12:14:10,232 INFO L125 PetriNetUnfolderBase]: For 1589589/1589692 co-relation queries the response was YES. [2024-06-14 12:14:10,293 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. [2024-06-14 12:14:10,330 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 409 selfloop transitions, 24 changer transitions 0/496 dead transitions. [2024-06-14 12:14:10,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 496 transitions, 6884 flow [2024-06-14 12:14:10,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:14:10,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:14:10,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-14 12:14:10,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2024-06-14 12:14:10,331 INFO L175 Difference]: Start difference. First operand has 329 places, 483 transitions, 5972 flow. Second operand 7 states and 128 transitions. [2024-06-14 12:14:10,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 496 transitions, 6884 flow [2024-06-14 12:14:13,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 496 transitions, 6736 flow, removed 58 selfloop flow, removed 5 redundant places. [2024-06-14 12:14:13,506 INFO L231 Difference]: Finished difference. Result has 331 places, 483 transitions, 5880 flow [2024-06-14 12:14:13,507 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} [2024-06-14 12:14:13,507 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 286 predicate places. [2024-06-14 12:14:13,507 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 483 transitions, 5880 flow [2024-06-14 12:14:13,507 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) [2024-06-14 12:14:13,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:13,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:13,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 12:14:13,508 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)] === [2024-06-14 12:14:13,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:13,508 INFO L85 PathProgramCache]: Analyzing trace with hash -16868781, now seen corresponding path program 1 times [2024-06-14 12:14:13,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:13,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115206929] [2024-06-14 12:14:13,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:13,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:13,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:14,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:14,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:14,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115206929] [2024-06-14 12:14:14,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115206929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:14,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:14,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:14:14,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806398695] [2024-06-14 12:14:14,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:14,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:14:14,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:14,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:14:14,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:14:14,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:14:14,372 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) [2024-06-14 12:14:14,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:14,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:14:14,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:16,018 INFO L124 PetriNetUnfolderBase]: 4425/6584 cut-off events. [2024-06-14 12:14:16,018 INFO L125 PetriNetUnfolderBase]: For 1635457/1635487 co-relation queries the response was YES. [2024-06-14 12:14:16,083 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. [2024-06-14 12:14:16,118 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 437 selfloop transitions, 33 changer transitions 0/511 dead transitions. [2024-06-14 12:14:16,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 511 transitions, 7242 flow [2024-06-14 12:14:16,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:14:16,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:14:16,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-14 12:14:16,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44155844155844154 [2024-06-14 12:14:16,120 INFO L175 Difference]: Start difference. First operand has 331 places, 483 transitions, 5880 flow. Second operand 7 states and 136 transitions. [2024-06-14 12:14:16,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 511 transitions, 7242 flow [2024-06-14 12:14:18,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 511 transitions, 7170 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 12:14:18,779 INFO L231 Difference]: Finished difference. Result has 333 places, 490 transitions, 6012 flow [2024-06-14 12:14:18,779 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} [2024-06-14 12:14:18,779 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 288 predicate places. [2024-06-14 12:14:18,780 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 490 transitions, 6012 flow [2024-06-14 12:14:18,780 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) [2024-06-14 12:14:18,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:18,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:18,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 12:14:18,780 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)] === [2024-06-14 12:14:18,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:18,780 INFO L85 PathProgramCache]: Analyzing trace with hash -2142653063, now seen corresponding path program 2 times [2024-06-14 12:14:18,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:18,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855408850] [2024-06-14 12:14:18,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:18,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:18,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:19,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:19,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:19,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855408850] [2024-06-14 12:14:19,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855408850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:19,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:19,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:14:19,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231527261] [2024-06-14 12:14:19,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:19,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:14:19,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:19,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:14:19,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:14:19,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:14:19,606 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) [2024-06-14 12:14:19,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:19,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:14:19,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:21,391 INFO L124 PetriNetUnfolderBase]: 4440/6606 cut-off events. [2024-06-14 12:14:21,391 INFO L125 PetriNetUnfolderBase]: For 1644912/1644948 co-relation queries the response was YES. [2024-06-14 12:14:21,453 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. [2024-06-14 12:14:21,487 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 433 selfloop transitions, 41 changer transitions 0/515 dead transitions. [2024-06-14 12:14:21,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 515 transitions, 7548 flow [2024-06-14 12:14:21,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:14:21,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:14:21,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-14 12:14:21,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4383116883116883 [2024-06-14 12:14:21,488 INFO L175 Difference]: Start difference. First operand has 333 places, 490 transitions, 6012 flow. Second operand 7 states and 135 transitions. [2024-06-14 12:14:21,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 515 transitions, 7548 flow [2024-06-14 12:14:24,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 515 transitions, 7440 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-14 12:14:24,661 INFO L231 Difference]: Finished difference. Result has 337 places, 496 transitions, 6135 flow [2024-06-14 12:14:24,662 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} [2024-06-14 12:14:24,662 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 292 predicate places. [2024-06-14 12:14:24,662 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 496 transitions, 6135 flow [2024-06-14 12:14:24,662 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) [2024-06-14 12:14:24,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:24,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:24,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 12:14:24,662 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)] === [2024-06-14 12:14:24,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:24,663 INFO L85 PathProgramCache]: Analyzing trace with hash 607102909, now seen corresponding path program 3 times [2024-06-14 12:14:24,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:24,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937538354] [2024-06-14 12:14:24,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:24,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:24,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:25,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:25,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:25,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937538354] [2024-06-14 12:14:25,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937538354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:25,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:25,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:14:25,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392027514] [2024-06-14 12:14:25,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:25,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:14:25,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:25,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:14:25,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:14:25,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:14:25,518 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) [2024-06-14 12:14:25,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:25,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:14:25,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:27,203 INFO L124 PetriNetUnfolderBase]: 4431/6594 cut-off events. [2024-06-14 12:14:27,203 INFO L125 PetriNetUnfolderBase]: For 1666869/1666905 co-relation queries the response was YES. [2024-06-14 12:14:27,273 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. [2024-06-14 12:14:27,312 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 436 selfloop transitions, 39 changer transitions 0/516 dead transitions. [2024-06-14 12:14:27,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 516 transitions, 7353 flow [2024-06-14 12:14:27,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:14:27,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:14:27,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-14 12:14:27,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4383116883116883 [2024-06-14 12:14:27,314 INFO L175 Difference]: Start difference. First operand has 337 places, 496 transitions, 6135 flow. Second operand 7 states and 135 transitions. [2024-06-14 12:14:27,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 516 transitions, 7353 flow [2024-06-14 12:14:30,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 516 transitions, 7213 flow, removed 54 selfloop flow, removed 3 redundant places. [2024-06-14 12:14:30,029 INFO L231 Difference]: Finished difference. Result has 341 places, 496 transitions, 6079 flow [2024-06-14 12:14:30,029 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} [2024-06-14 12:14:30,029 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 296 predicate places. [2024-06-14 12:14:30,029 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 496 transitions, 6079 flow [2024-06-14 12:14:30,029 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) [2024-06-14 12:14:30,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:30,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:30,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 12:14:30,030 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)] === [2024-06-14 12:14:30,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:30,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1428261265, now seen corresponding path program 1 times [2024-06-14 12:14:30,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:30,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680089376] [2024-06-14 12:14:30,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:30,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:30,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:31,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:31,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:31,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680089376] [2024-06-14 12:14:31,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680089376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:31,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:31,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:14:31,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082008522] [2024-06-14 12:14:31,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:31,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:14:31,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:31,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:14:31,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:14:31,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:14:31,476 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) [2024-06-14 12:14:31,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:31,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:14:31,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:33,435 INFO L124 PetriNetUnfolderBase]: 4585/6834 cut-off events. [2024-06-14 12:14:33,435 INFO L125 PetriNetUnfolderBase]: For 1780202/1780291 co-relation queries the response was YES. [2024-06-14 12:14:33,511 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. [2024-06-14 12:14:33,553 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 432 selfloop transitions, 55 changer transitions 0/577 dead transitions. [2024-06-14 12:14:33,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 577 transitions, 8064 flow [2024-06-14 12:14:33,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-14 12:14:33,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-14 12:14:33,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 257 transitions. [2024-06-14 12:14:33,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4172077922077922 [2024-06-14 12:14:33,555 INFO L175 Difference]: Start difference. First operand has 341 places, 496 transitions, 6079 flow. Second operand 14 states and 257 transitions. [2024-06-14 12:14:33,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 577 transitions, 8064 flow [2024-06-14 12:14:37,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 577 transitions, 7968 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 12:14:37,111 INFO L231 Difference]: Finished difference. Result has 353 places, 516 transitions, 6601 flow [2024-06-14 12:14:37,111 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} [2024-06-14 12:14:37,111 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 308 predicate places. [2024-06-14 12:14:37,111 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 516 transitions, 6601 flow [2024-06-14 12:14:37,112 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) [2024-06-14 12:14:37,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:37,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:37,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 12:14:37,112 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)] === [2024-06-14 12:14:37,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:37,113 INFO L85 PathProgramCache]: Analyzing trace with hash -369684617, now seen corresponding path program 2 times [2024-06-14 12:14:37,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:37,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501124181] [2024-06-14 12:14:37,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:37,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:37,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:37,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:37,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:37,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501124181] [2024-06-14 12:14:37,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501124181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:37,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:37,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:14:37,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441601588] [2024-06-14 12:14:37,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:37,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:14:37,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:37,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:14:37,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:14:38,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:14:38,082 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) [2024-06-14 12:14:38,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:38,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:14:38,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:39,868 INFO L124 PetriNetUnfolderBase]: 4503/6722 cut-off events. [2024-06-14 12:14:39,868 INFO L125 PetriNetUnfolderBase]: For 1760311/1760347 co-relation queries the response was YES. [2024-06-14 12:14:39,941 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. [2024-06-14 12:14:39,981 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 449 selfloop transitions, 72 changer transitions 0/546 dead transitions. [2024-06-14 12:14:39,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 546 transitions, 8181 flow [2024-06-14 12:14:39,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:14:39,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:14:39,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-14 12:14:39,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42676767676767674 [2024-06-14 12:14:39,983 INFO L175 Difference]: Start difference. First operand has 353 places, 516 transitions, 6601 flow. Second operand 9 states and 169 transitions. [2024-06-14 12:14:39,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 546 transitions, 8181 flow [2024-06-14 12:14:43,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 546 transitions, 7892 flow, removed 117 selfloop flow, removed 7 redundant places. [2024-06-14 12:14:43,245 INFO L231 Difference]: Finished difference. Result has 355 places, 519 transitions, 6509 flow [2024-06-14 12:14:43,245 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} [2024-06-14 12:14:43,246 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 310 predicate places. [2024-06-14 12:14:43,246 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 519 transitions, 6509 flow [2024-06-14 12:14:43,246 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) [2024-06-14 12:14:43,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:43,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:43,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 12:14:43,246 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)] === [2024-06-14 12:14:43,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:43,247 INFO L85 PathProgramCache]: Analyzing trace with hash 674402035, now seen corresponding path program 2 times [2024-06-14 12:14:43,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:43,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562360711] [2024-06-14 12:14:43,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:43,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:43,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:44,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:44,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:44,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562360711] [2024-06-14 12:14:44,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562360711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:44,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:44,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:14:44,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654818469] [2024-06-14 12:14:44,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:44,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:14:44,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:44,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:14:44,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:14:44,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:14:44,222 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) [2024-06-14 12:14:44,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:44,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:14:44,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:46,234 INFO L124 PetriNetUnfolderBase]: 4697/7002 cut-off events. [2024-06-14 12:14:46,234 INFO L125 PetriNetUnfolderBase]: For 1910975/1911105 co-relation queries the response was YES. [2024-06-14 12:14:46,302 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. [2024-06-14 12:14:46,343 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 427 selfloop transitions, 72 changer transitions 0/589 dead transitions. [2024-06-14 12:14:46,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 589 transitions, 8513 flow [2024-06-14 12:14:46,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 12:14:46,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 12:14:46,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 243 transitions. [2024-06-14 12:14:46,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42482517482517484 [2024-06-14 12:14:46,345 INFO L175 Difference]: Start difference. First operand has 355 places, 519 transitions, 6509 flow. Second operand 13 states and 243 transitions. [2024-06-14 12:14:46,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 589 transitions, 8513 flow [2024-06-14 12:14:49,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 589 transitions, 8388 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-14 12:14:49,061 INFO L231 Difference]: Finished difference. Result has 366 places, 534 transitions, 7015 flow [2024-06-14 12:14:49,061 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} [2024-06-14 12:14:49,061 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 321 predicate places. [2024-06-14 12:14:49,061 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 534 transitions, 7015 flow [2024-06-14 12:14:49,061 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) [2024-06-14 12:14:49,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:49,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:49,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 12:14:49,062 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)] === [2024-06-14 12:14:49,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:49,062 INFO L85 PathProgramCache]: Analyzing trace with hash -30662705, now seen corresponding path program 3 times [2024-06-14 12:14:49,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:49,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642605567] [2024-06-14 12:14:49,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:49,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:49,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:50,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:50,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:50,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642605567] [2024-06-14 12:14:50,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642605567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:50,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:50,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:14:50,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426461126] [2024-06-14 12:14:50,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:50,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:14:50,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:50,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:14:50,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:14:50,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:14:50,409 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) [2024-06-14 12:14:50,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:50,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:14:50,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:52,728 INFO L124 PetriNetUnfolderBase]: 4927/7355 cut-off events. [2024-06-14 12:14:52,728 INFO L125 PetriNetUnfolderBase]: For 2064892/2065145 co-relation queries the response was YES. [2024-06-14 12:14:52,802 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. [2024-06-14 12:14:52,844 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 466 selfloop transitions, 86 changer transitions 0/642 dead transitions. [2024-06-14 12:14:52,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 642 transitions, 10049 flow [2024-06-14 12:14:52,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 12:14:52,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 12:14:52,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 241 transitions. [2024-06-14 12:14:52,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42132867132867136 [2024-06-14 12:14:52,846 INFO L175 Difference]: Start difference. First operand has 366 places, 534 transitions, 7015 flow. Second operand 13 states and 241 transitions. [2024-06-14 12:14:52,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 642 transitions, 10049 flow [2024-06-14 12:14:56,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 642 transitions, 9482 flow, removed 259 selfloop flow, removed 6 redundant places. [2024-06-14 12:14:56,294 INFO L231 Difference]: Finished difference. Result has 378 places, 585 transitions, 8103 flow [2024-06-14 12:14:56,294 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} [2024-06-14 12:14:56,295 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 333 predicate places. [2024-06-14 12:14:56,295 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 585 transitions, 8103 flow [2024-06-14 12:14:56,295 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) [2024-06-14 12:14:56,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:56,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:56,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 12:14:56,295 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)] === [2024-06-14 12:14:56,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:56,295 INFO L85 PathProgramCache]: Analyzing trace with hash 268912789, now seen corresponding path program 4 times [2024-06-14 12:14:56,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:56,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635204144] [2024-06-14 12:14:56,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:56,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:56,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:57,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:57,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:57,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635204144] [2024-06-14 12:14:57,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635204144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:57,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:57,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:14:57,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46857287] [2024-06-14 12:14:57,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:57,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:14:57,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:57,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:14:57,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:14:57,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:14:57,213 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) [2024-06-14 12:14:57,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:57,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:14:57,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:59,317 INFO L124 PetriNetUnfolderBase]: 5183/7757 cut-off events. [2024-06-14 12:14:59,317 INFO L125 PetriNetUnfolderBase]: For 2235740/2235955 co-relation queries the response was YES. [2024-06-14 12:14:59,406 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. [2024-06-14 12:14:59,452 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 440 selfloop transitions, 140 changer transitions 0/670 dead transitions. [2024-06-14 12:14:59,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 670 transitions, 11598 flow [2024-06-14 12:14:59,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 12:14:59,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 12:14:59,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 226 transitions. [2024-06-14 12:14:59,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42803030303030304 [2024-06-14 12:14:59,454 INFO L175 Difference]: Start difference. First operand has 378 places, 585 transitions, 8103 flow. Second operand 12 states and 226 transitions. [2024-06-14 12:14:59,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 670 transitions, 11598 flow [2024-06-14 12:15:03,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 670 transitions, 10897 flow, removed 334 selfloop flow, removed 4 redundant places. [2024-06-14 12:15:03,279 INFO L231 Difference]: Finished difference. Result has 388 places, 618 transitions, 9337 flow [2024-06-14 12:15:03,279 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} [2024-06-14 12:15:03,279 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 343 predicate places. [2024-06-14 12:15:03,280 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 618 transitions, 9337 flow [2024-06-14 12:15:03,280 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) [2024-06-14 12:15:03,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:03,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:03,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 12:15:03,280 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)] === [2024-06-14 12:15:03,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:03,280 INFO L85 PathProgramCache]: Analyzing trace with hash 689269139, now seen corresponding path program 1 times [2024-06-14 12:15:03,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:03,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833739957] [2024-06-14 12:15:03,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:03,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:03,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:04,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:04,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:04,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833739957] [2024-06-14 12:15:04,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833739957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:04,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:04,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:15:04,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318896149] [2024-06-14 12:15:04,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:04,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:15:04,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:04,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:15:04,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:15:04,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:15:04,218 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) [2024-06-14 12:15:04,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:04,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:15:04,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:06,722 INFO L124 PetriNetUnfolderBase]: 5665/8405 cut-off events. [2024-06-14 12:15:06,723 INFO L125 PetriNetUnfolderBase]: For 2224018/2224023 co-relation queries the response was YES. [2024-06-14 12:15:06,830 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. [2024-06-14 12:15:06,881 INFO L140 encePairwiseOnDemand]: 28/44 looper letters, 599 selfloop transitions, 136 changer transitions 0/738 dead transitions. [2024-06-14 12:15:06,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 738 transitions, 13976 flow [2024-06-14 12:15:06,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 12:15:06,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 12:15:06,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 251 transitions. [2024-06-14 12:15:06,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4388111888111888 [2024-06-14 12:15:06,883 INFO L175 Difference]: Start difference. First operand has 388 places, 618 transitions, 9337 flow. Second operand 13 states and 251 transitions. [2024-06-14 12:15:06,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 738 transitions, 13976 flow [2024-06-14 12:15:11,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 738 transitions, 13534 flow, removed 162 selfloop flow, removed 8 redundant places. [2024-06-14 12:15:11,194 INFO L231 Difference]: Finished difference. Result has 395 places, 661 transitions, 10272 flow [2024-06-14 12:15:11,194 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} [2024-06-14 12:15:11,195 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 350 predicate places. [2024-06-14 12:15:11,195 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 661 transitions, 10272 flow [2024-06-14 12:15:11,195 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) [2024-06-14 12:15:11,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:11,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:11,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 12:15:11,196 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)] === [2024-06-14 12:15:11,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:11,196 INFO L85 PathProgramCache]: Analyzing trace with hash 689265295, now seen corresponding path program 5 times [2024-06-14 12:15:11,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:11,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987029372] [2024-06-14 12:15:11,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:11,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:11,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:12,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:12,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:12,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987029372] [2024-06-14 12:15:12,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987029372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:12,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:12,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:15:12,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898376910] [2024-06-14 12:15:12,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:12,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:15:12,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:12,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:15:12,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:15:12,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:15:12,249 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) [2024-06-14 12:15:12,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:12,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:15:12,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:14,990 INFO L124 PetriNetUnfolderBase]: 5528/8285 cut-off events. [2024-06-14 12:15:14,990 INFO L125 PetriNetUnfolderBase]: For 2376076/2376222 co-relation queries the response was YES. [2024-06-14 12:15:15,102 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. [2024-06-14 12:15:15,159 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 509 selfloop transitions, 115 changer transitions 0/725 dead transitions. [2024-06-14 12:15:15,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 725 transitions, 12411 flow [2024-06-14 12:15:15,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 12:15:15,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 12:15:15,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 238 transitions. [2024-06-14 12:15:15,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160839160839161 [2024-06-14 12:15:15,160 INFO L175 Difference]: Start difference. First operand has 395 places, 661 transitions, 10272 flow. Second operand 13 states and 238 transitions. [2024-06-14 12:15:15,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 725 transitions, 12411 flow [2024-06-14 12:15:20,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 725 transitions, 11976 flow, removed 175 selfloop flow, removed 5 redundant places. [2024-06-14 12:15:20,073 INFO L231 Difference]: Finished difference. Result has 403 places, 675 transitions, 10754 flow [2024-06-14 12:15:20,073 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} [2024-06-14 12:15:20,073 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 358 predicate places. [2024-06-14 12:15:20,073 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 675 transitions, 10754 flow [2024-06-14 12:15:20,073 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) [2024-06-14 12:15:20,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:20,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:20,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 12:15:20,073 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)] === [2024-06-14 12:15:20,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:20,074 INFO L85 PathProgramCache]: Analyzing trace with hash -28307821, now seen corresponding path program 2 times [2024-06-14 12:15:20,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:20,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109761054] [2024-06-14 12:15:20,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:20,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:20,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:21,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:21,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:21,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109761054] [2024-06-14 12:15:21,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109761054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:21,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:21,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:15:21,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903796378] [2024-06-14 12:15:21,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:21,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:15:21,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:21,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:15:21,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:15:22,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:15:22,024 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) [2024-06-14 12:15:22,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:22,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:15:22,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:25,442 INFO L124 PetriNetUnfolderBase]: 6061/8967 cut-off events. [2024-06-14 12:15:25,442 INFO L125 PetriNetUnfolderBase]: For 2408125/2408130 co-relation queries the response was YES. [2024-06-14 12:15:25,536 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. [2024-06-14 12:15:25,586 INFO L140 encePairwiseOnDemand]: 27/44 looper letters, 640 selfloop transitions, 152 changer transitions 0/795 dead transitions. [2024-06-14 12:15:25,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 795 transitions, 14979 flow [2024-06-14 12:15:25,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-14 12:15:25,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-14 12:15:25,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 262 transitions. [2024-06-14 12:15:25,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4253246753246753 [2024-06-14 12:15:25,587 INFO L175 Difference]: Start difference. First operand has 403 places, 675 transitions, 10754 flow. Second operand 14 states and 262 transitions. [2024-06-14 12:15:25,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 795 transitions, 14979 flow [2024-06-14 12:15:29,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 795 transitions, 14047 flow, removed 354 selfloop flow, removed 10 redundant places. [2024-06-14 12:15:29,865 INFO L231 Difference]: Finished difference. Result has 412 places, 732 transitions, 11480 flow [2024-06-14 12:15:29,865 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} [2024-06-14 12:15:29,865 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 367 predicate places. [2024-06-14 12:15:29,865 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 732 transitions, 11480 flow [2024-06-14 12:15:29,866 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) [2024-06-14 12:15:29,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:29,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:29,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 12:15:29,866 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)] === [2024-06-14 12:15:29,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:29,866 INFO L85 PathProgramCache]: Analyzing trace with hash -28311665, now seen corresponding path program 6 times [2024-06-14 12:15:29,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:29,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253217536] [2024-06-14 12:15:29,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:29,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:29,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:31,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:31,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:31,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253217536] [2024-06-14 12:15:31,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253217536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:31,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:31,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:15:31,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24579674] [2024-06-14 12:15:31,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:31,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:15:31,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:31,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:15:31,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:15:31,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:15:31,292 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) [2024-06-14 12:15:31,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:31,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:15:31,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:34,731 INFO L124 PetriNetUnfolderBase]: 5814/8703 cut-off events. [2024-06-14 12:15:34,731 INFO L125 PetriNetUnfolderBase]: For 2444586/2444661 co-relation queries the response was YES. [2024-06-14 12:15:34,842 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. [2024-06-14 12:15:34,908 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 574 selfloop transitions, 90 changer transitions 0/782 dead transitions. [2024-06-14 12:15:34,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 782 transitions, 13018 flow [2024-06-14 12:15:34,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 12:15:34,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 12:15:34,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 236 transitions. [2024-06-14 12:15:34,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125874125874126 [2024-06-14 12:15:34,910 INFO L175 Difference]: Start difference. First operand has 412 places, 732 transitions, 11480 flow. Second operand 13 states and 236 transitions. [2024-06-14 12:15:34,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 782 transitions, 13018 flow [2024-06-14 12:15:40,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 782 transitions, 12193 flow, removed 379 selfloop flow, removed 4 redundant places. [2024-06-14 12:15:40,476 INFO L231 Difference]: Finished difference. Result has 421 places, 732 transitions, 10856 flow [2024-06-14 12:15:40,476 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} [2024-06-14 12:15:40,476 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 376 predicate places. [2024-06-14 12:15:40,476 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 732 transitions, 10856 flow [2024-06-14 12:15:40,476 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) [2024-06-14 12:15:40,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:40,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:40,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 12:15:40,477 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)] === [2024-06-14 12:15:40,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:40,477 INFO L85 PathProgramCache]: Analyzing trace with hash -673488753, now seen corresponding path program 1 times [2024-06-14 12:15:40,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:40,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685197235] [2024-06-14 12:15:40,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:40,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:40,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:41,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:41,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:41,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685197235] [2024-06-14 12:15:41,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685197235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:41,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:41,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:15:41,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942756436] [2024-06-14 12:15:41,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:41,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:15:41,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:41,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:15:41,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:15:41,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:15:41,668 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) [2024-06-14 12:15:41,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:41,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:15:41,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:45,162 INFO L124 PetriNetUnfolderBase]: 6457/9543 cut-off events. [2024-06-14 12:15:45,162 INFO L125 PetriNetUnfolderBase]: For 2457256/2457267 co-relation queries the response was YES. [2024-06-14 12:15:45,285 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. [2024-06-14 12:15:45,341 INFO L140 encePairwiseOnDemand]: 28/44 looper letters, 656 selfloop transitions, 202 changer transitions 0/861 dead transitions. [2024-06-14 12:15:45,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 861 transitions, 14909 flow [2024-06-14 12:15:45,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:15:45,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:15:45,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 220 transitions. [2024-06-14 12:15:45,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 12:15:45,342 INFO L175 Difference]: Start difference. First operand has 421 places, 732 transitions, 10856 flow. Second operand 11 states and 220 transitions. [2024-06-14 12:15:45,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 861 transitions, 14909 flow [2024-06-14 12:15:49,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 861 transitions, 14742 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-14 12:15:49,850 INFO L231 Difference]: Finished difference. Result has 425 places, 786 transitions, 11994 flow [2024-06-14 12:15:49,850 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} [2024-06-14 12:15:49,851 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 380 predicate places. [2024-06-14 12:15:49,851 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 786 transitions, 11994 flow [2024-06-14 12:15:49,851 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) [2024-06-14 12:15:49,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:49,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:49,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 12:15:49,851 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)] === [2024-06-14 12:15:49,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:49,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1144491407, now seen corresponding path program 3 times [2024-06-14 12:15:49,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:49,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859474064] [2024-06-14 12:15:49,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:49,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:49,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:51,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:51,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:51,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859474064] [2024-06-14 12:15:51,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859474064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:51,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:51,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:15:51,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655478381] [2024-06-14 12:15:51,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:51,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:15:51,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:51,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:15:51,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:15:51,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:15:51,240 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) [2024-06-14 12:15:51,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:51,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:15:51,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:55,220 INFO L124 PetriNetUnfolderBase]: 7149/10530 cut-off events. [2024-06-14 12:15:55,221 INFO L125 PetriNetUnfolderBase]: For 2640042/2640051 co-relation queries the response was YES. [2024-06-14 12:15:55,357 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. [2024-06-14 12:15:55,416 INFO L140 encePairwiseOnDemand]: 26/44 looper letters, 828 selfloop transitions, 309 changer transitions 0/1140 dead transitions. [2024-06-14 12:15:55,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 1140 transitions, 19273 flow [2024-06-14 12:15:55,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 12:15:55,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 12:15:55,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 239 transitions. [2024-06-14 12:15:55,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45265151515151514 [2024-06-14 12:15:55,417 INFO L175 Difference]: Start difference. First operand has 425 places, 786 transitions, 11994 flow. Second operand 12 states and 239 transitions. [2024-06-14 12:15:55,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 1140 transitions, 19273 flow [2024-06-14 12:16:00,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 1140 transitions, 18672 flow, removed 104 selfloop flow, removed 7 redundant places. [2024-06-14 12:16:00,636 INFO L231 Difference]: Finished difference. Result has 437 places, 971 transitions, 15106 flow [2024-06-14 12:16:00,636 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} [2024-06-14 12:16:00,637 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 392 predicate places. [2024-06-14 12:16:00,637 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 971 transitions, 15106 flow [2024-06-14 12:16:00,637 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) [2024-06-14 12:16:00,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:00,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:00,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 12:16:00,637 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)] === [2024-06-14 12:16:00,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:00,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1144664387, now seen corresponding path program 4 times [2024-06-14 12:16:00,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:00,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655621448] [2024-06-14 12:16:00,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:00,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:00,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:01,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:01,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:01,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655621448] [2024-06-14 12:16:01,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655621448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:01,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:01,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:16:01,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166490350] [2024-06-14 12:16:01,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:01,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:16:01,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:01,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:16:01,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:16:01,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:16:01,891 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) [2024-06-14 12:16:01,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:01,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:16:01,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:06,115 INFO L124 PetriNetUnfolderBase]: 7185/10582 cut-off events. [2024-06-14 12:16:06,115 INFO L125 PetriNetUnfolderBase]: For 2701887/2701896 co-relation queries the response was YES. [2024-06-14 12:16:06,258 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. [2024-06-14 12:16:06,330 INFO L140 encePairwiseOnDemand]: 26/44 looper letters, 845 selfloop transitions, 297 changer transitions 0/1145 dead transitions. [2024-06-14 12:16:06,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 1145 transitions, 20464 flow [2024-06-14 12:16:06,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 12:16:06,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 12:16:06,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 240 transitions. [2024-06-14 12:16:06,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 12:16:06,332 INFO L175 Difference]: Start difference. First operand has 437 places, 971 transitions, 15106 flow. Second operand 12 states and 240 transitions. [2024-06-14 12:16:06,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 1145 transitions, 20464 flow [2024-06-14 12:16:11,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 1145 transitions, 20224 flow, removed 112 selfloop flow, removed 2 redundant places. [2024-06-14 12:16:11,944 INFO L231 Difference]: Finished difference. Result has 447 places, 975 transitions, 15705 flow [2024-06-14 12:16:11,944 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} [2024-06-14 12:16:11,945 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 402 predicate places. [2024-06-14 12:16:11,945 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 975 transitions, 15705 flow [2024-06-14 12:16:11,945 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) [2024-06-14 12:16:11,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:11,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:11,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 12:16:11,945 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)] === [2024-06-14 12:16:11,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:11,945 INFO L85 PathProgramCache]: Analyzing trace with hash 712876589, now seen corresponding path program 5 times [2024-06-14 12:16:11,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:11,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900510694] [2024-06-14 12:16:11,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:11,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:11,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:13,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:13,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:13,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900510694] [2024-06-14 12:16:13,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900510694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:13,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:13,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:16:13,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578440744] [2024-06-14 12:16:13,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:13,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:16:13,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:13,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:16:13,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:16:13,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 12:16:13,257 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) [2024-06-14 12:16:13,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:13,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 12:16:13,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:17,584 INFO L124 PetriNetUnfolderBase]: 7256/10683 cut-off events. [2024-06-14 12:16:17,584 INFO L125 PetriNetUnfolderBase]: For 2767770/2767779 co-relation queries the response was YES. [2024-06-14 12:16:17,730 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. [2024-06-14 12:16:17,805 INFO L140 encePairwiseOnDemand]: 26/44 looper letters, 849 selfloop transitions, 310 changer transitions 0/1162 dead transitions. [2024-06-14 12:16:17,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 1162 transitions, 21529 flow [2024-06-14 12:16:17,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 12:16:17,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 12:16:17,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 259 transitions. [2024-06-14 12:16:17,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4527972027972028 [2024-06-14 12:16:17,806 INFO L175 Difference]: Start difference. First operand has 447 places, 975 transitions, 15705 flow. Second operand 13 states and 259 transitions. [2024-06-14 12:16:17,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 1162 transitions, 21529 flow [2024-06-14 12:16:23,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 1162 transitions, 20872 flow, removed 110 selfloop flow, removed 6 redundant places. [2024-06-14 12:16:23,705 INFO L231 Difference]: Finished difference. Result has 455 places, 985 transitions, 16101 flow [2024-06-14 12:16:23,706 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} [2024-06-14 12:16:23,706 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 410 predicate places. [2024-06-14 12:16:23,706 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 985 transitions, 16101 flow [2024-06-14 12:16:23,706 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) [2024-06-14 12:16:23,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:23,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:23,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 12:16:23,706 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)] === [2024-06-14 12:16:23,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:23,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1144669161, now seen corresponding path program 7 times [2024-06-14 12:16:23,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:23,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941067375] [2024-06-14 12:16:23,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:23,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:23,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:24,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:24,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:24,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941067375] [2024-06-14 12:16:24,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941067375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:24,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:24,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 12:16:24,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645740224] [2024-06-14 12:16:24,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:24,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 12:16:24,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:24,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 12:16:24,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-14 12:16:25,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:16:25,083 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) [2024-06-14 12:16:25,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:25,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:16:25,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:29,361 INFO L124 PetriNetUnfolderBase]: 7045/10504 cut-off events. [2024-06-14 12:16:29,361 INFO L125 PetriNetUnfolderBase]: For 2935418/2935534 co-relation queries the response was YES. [2024-06-14 12:16:29,503 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. [2024-06-14 12:16:29,580 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 726 selfloop transitions, 126 changer transitions 0/1053 dead transitions. [2024-06-14 12:16:29,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 1053 transitions, 18457 flow [2024-06-14 12:16:29,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 12:16:29,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 12:16:29,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 224 transitions. [2024-06-14 12:16:29,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-14 12:16:29,582 INFO L175 Difference]: Start difference. First operand has 455 places, 985 transitions, 16101 flow. Second operand 12 states and 224 transitions. [2024-06-14 12:16:29,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 1053 transitions, 18457 flow [2024-06-14 12:16:35,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 1053 transitions, 17819 flow, removed 143 selfloop flow, removed 8 redundant places. [2024-06-14 12:16:35,626 INFO L231 Difference]: Finished difference. Result has 461 places, 1008 transitions, 16182 flow [2024-06-14 12:16:35,626 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} [2024-06-14 12:16:35,627 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 416 predicate places. [2024-06-14 12:16:35,627 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 1008 transitions, 16182 flow [2024-06-14 12:16:35,627 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) [2024-06-14 12:16:35,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:35,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:16:35,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 12:16:35,627 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)] === [2024-06-14 12:16:35,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:35,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1104942100, now seen corresponding path program 1 times [2024-06-14 12:16:35,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:35,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271654044] [2024-06-14 12:16:35,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:35,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:35,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:36,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:36,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:36,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271654044] [2024-06-14 12:16:36,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271654044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:36,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:36,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:16:36,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313580567] [2024-06-14 12:16:36,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:36,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:16:36,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:36,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:16:36,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:16:36,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-14 12:16:36,411 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) [2024-06-14 12:16:36,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:36,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-14 12:16:36,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand