./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix025_power.oepc_power.opt_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/mix025_power.oepc_power.opt_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/mix025_power.oepc_power.opt_pso.oepc_rmo.oepc_tso.oepc_tso.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix025_power.oepc_power.opt_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 12:10:26,772 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 12:10:26,837 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 12:10:26,842 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 12:10:26,843 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 12:10:26,862 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 12:10:26,865 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 12:10:26,865 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 12:10:26,866 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 12:10:26,869 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 12:10:26,869 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 12:10:26,869 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 12:10:26,870 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 12:10:26,871 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 12:10:26,871 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 12:10:26,872 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 12:10:26,872 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 12:10:26,872 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 12:10:26,872 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 12:10:26,872 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 12:10:26,873 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 12:10:26,874 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 12:10:26,874 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 12:10:26,874 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 12:10:26,874 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 12:10:26,875 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 12:10:26,875 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 12:10:26,875 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 12:10:26,875 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 12:10:26,876 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 12:10:26,876 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 12:10:26,877 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 12:10:26,877 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:10:26,877 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 12:10:26,877 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 12:10:26,877 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 12:10:26,878 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 12:10:26,878 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 12:10:26,878 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 12:10:26,878 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 12:10:26,878 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 12:10:26,879 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 12:10:26,879 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 12:10:26,879 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 12:10:27,126 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 12:10:27,153 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 12:10:27,155 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 12:10:27,156 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 12:10:27,156 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 12:10:27,157 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix025_power.oepc_power.opt_pso.oepc_rmo.oepc_tso.oepc_tso.opt.i [2024-06-14 12:10:28,208 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 12:10:28,433 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 12:10:28,435 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix025_power.oepc_power.opt_pso.oepc_rmo.oepc_tso.oepc_tso.opt.i [2024-06-14 12:10:28,450 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b45835147/c77a1cc41ed74b4cbeedadd9abaa3c1d/FLAG87395f2aa [2024-06-14 12:10:28,465 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b45835147/c77a1cc41ed74b4cbeedadd9abaa3c1d [2024-06-14 12:10:28,467 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 12:10:28,468 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 12:10:28,468 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix025_power.oepc_power.opt_pso.oepc_rmo.oepc_tso.oepc_tso.opt.yml/witness.yml [2024-06-14 12:10:28,618 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 12:10:28,619 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 12:10:28,620 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 12:10:28,620 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 12:10:28,624 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 12:10:28,624 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:10:28" (1/2) ... [2024-06-14 12:10:28,625 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41385199 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:10:28, skipping insertion in model container [2024-06-14 12:10:28,625 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:10:28" (1/2) ... [2024-06-14 12:10:28,627 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@66b982dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:10:28, skipping insertion in model container [2024-06-14 12:10:28,627 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:10:28" (2/2) ... [2024-06-14 12:10:28,627 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41385199 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:10:28, skipping insertion in model container [2024-06-14 12:10:28,627 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:10:28" (2/2) ... [2024-06-14 12:10:28,627 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 12:10:28,701 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 12:10:28,702 INFO L97 edCorrectnessWitness]: Location invariant before [L844-L844] ((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1))) [2024-06-14 12:10:28,702 INFO L97 edCorrectnessWitness]: Location invariant before [L843-L843] ((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 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 || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1))) [2024-06-14 12:10:28,703 INFO L97 edCorrectnessWitness]: Location invariant before [L841-L841] ((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1))) [2024-06-14 12:10:28,703 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 12:10:28,703 INFO L106 edCorrectnessWitness]: ghost_update [L839-L839] multithreaded = 1; [2024-06-14 12:10:28,739 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 12:10:29,037 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:10:29,045 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 12:10:29,198 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:10:29,265 INFO L206 MainTranslator]: Completed translation [2024-06-14 12:10:29,266 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:10:29 WrapperNode [2024-06-14 12:10:29,266 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 12:10:29,267 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 12:10:29,268 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 12:10:29,268 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 12:10:29,273 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 12:10:29" (1/1) ... [2024-06-14 12:10:29,299 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 12:10:29" (1/1) ... [2024-06-14 12:10:29,321 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 126 [2024-06-14 12:10:29,323 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 12:10:29,324 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 12:10:29,324 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 12:10:29,324 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 12:10:29,346 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 12:10:29" (1/1) ... [2024-06-14 12:10:29,346 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 12:10:29" (1/1) ... [2024-06-14 12:10:29,349 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 12:10:29" (1/1) ... [2024-06-14 12:10:29,369 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 12:10:29,374 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 12:10:29" (1/1) ... [2024-06-14 12:10:29,375 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 12:10:29" (1/1) ... [2024-06-14 12:10:29,381 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 12:10:29" (1/1) ... [2024-06-14 12:10:29,389 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 12:10:29" (1/1) ... [2024-06-14 12:10:29,392 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 12:10:29" (1/1) ... [2024-06-14 12:10:29,396 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 12:10:29" (1/1) ... [2024-06-14 12:10:29,399 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 12:10:29,404 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 12:10:29,404 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 12:10:29,404 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 12:10:29,405 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 12:10:29" (1/1) ... [2024-06-14 12:10:29,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:10:29,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 12:10:29,429 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 12:10:29,447 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 12:10:29,459 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 12:10:29,459 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 12:10:29,460 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 12:10:29,460 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 12:10:29,460 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 12:10:29,460 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 12:10:29,460 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 12:10:29,461 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 12:10:29,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 12:10:29,461 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 12:10:29,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 12:10:29,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 12:10:29,462 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 12:10:29,599 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 12:10:29,601 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 12:10:29,927 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 12:10:29,927 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 12:10:30,046 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 12:10:30,046 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 12:10:30,047 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:10:30 BoogieIcfgContainer [2024-06-14 12:10:30,047 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 12:10:30,049 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 12:10:30,050 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 12:10:30,052 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 12:10:30,053 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 12:10:28" (1/4) ... [2024-06-14 12:10:30,054 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@462fbc8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:10:30, skipping insertion in model container [2024-06-14 12:10:30,054 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:10:28" (2/4) ... [2024-06-14 12:10:30,054 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@462fbc8b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:10:30, skipping insertion in model container [2024-06-14 12:10:30,054 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 12:10:29" (3/4) ... [2024-06-14 12:10:30,055 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@462fbc8b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:10:30, skipping insertion in model container [2024-06-14 12:10:30,055 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:10:30" (4/4) ... [2024-06-14 12:10:30,056 INFO L112 eAbstractionObserver]: Analyzing ICFG mix025_power.oepc_power.opt_pso.oepc_rmo.oepc_tso.oepc_tso.opt.i [2024-06-14 12:10:30,071 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 12:10:30,072 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 12:10:30,072 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 12:10:30,110 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 12:10:30,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-14 12:10:30,171 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-14 12:10:30,171 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:10:30,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 61 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 12:10:30,173 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-14 12:10:30,176 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-14 12:10:30,184 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 12:10:30,190 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;@3f41b37c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 12:10:30,191 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 12:10:30,196 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 12:10:30,196 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-06-14 12:10:30,197 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:10:30,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:30,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 12:10:30,198 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 12:10:30,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:30,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1315925462, now seen corresponding path program 1 times [2024-06-14 12:10:30,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:30,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909122070] [2024-06-14 12:10:30,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:30,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:30,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:31,091 INFO 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 12:10:31,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:31,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909122070] [2024-06-14 12:10:31,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909122070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:31,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:31,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 12:10:31,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990793019] [2024-06-14 12:10:31,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:31,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 12:10:31,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:31,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 12:10:31,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 12:10:31,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-14 12:10:31,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states 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 12:10:31,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:31,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-14 12:10:31,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:31,519 INFO L124 PetriNetUnfolderBase]: 1359/2100 cut-off events. [2024-06-14 12:10:31,519 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-06-14 12:10:31,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4216 conditions, 2100 events. 1359/2100 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10067 event pairs, 941 based on Foata normal form. 1/2058 useless extension candidates. Maximal degree in co-relation 4201. Up to 2029 conditions per place. [2024-06-14 12:10:31,531 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 34 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-14 12:10:31,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 177 flow [2024-06-14 12:10:31,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 12:10:31,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 12:10:31,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 74 transitions. [2024-06-14 12:10:31,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-14 12:10:31,541 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 74 transitions. [2024-06-14 12:10:31,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 177 flow [2024-06-14 12:10:31,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 172 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 12:10:31,545 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-14 12:10:31,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-14 12:10:31,549 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-14 12:10:31,549 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-14 12:10:31,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states 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 12:10:31,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:31,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:31,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 12:10:31,550 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 12:10:31,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:31,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1883946295, now seen corresponding path program 1 times [2024-06-14 12:10:31,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:31,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952269843] [2024-06-14 12:10:31,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:31,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:31,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:32,007 INFO 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 12:10:32,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:32,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952269843] [2024-06-14 12:10:32,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952269843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:32,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:32,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 12:10:32,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991804397] [2024-06-14 12:10:32,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:32,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 12:10:32,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:32,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 12:10:32,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-14 12:10:32,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-14 12:10:32,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:32,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:32,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-14 12:10:32,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:32,298 INFO L124 PetriNetUnfolderBase]: 1353/2091 cut-off events. [2024-06-14 12:10:32,298 INFO L125 PetriNetUnfolderBase]: For 396/396 co-relation queries the response was YES. [2024-06-14 12:10:32,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4749 conditions, 2091 events. 1353/2091 cut-off events. For 396/396 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9990 event pairs, 795 based on Foata normal form. 3/2084 useless extension candidates. Maximal degree in co-relation 4734. Up to 2005 conditions per place. [2024-06-14 12:10:32,307 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 41 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-14 12:10:32,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 244 flow [2024-06-14 12:10:32,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 12:10:32,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 12:10:32,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 95 transitions. [2024-06-14 12:10:32,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5654761904761905 [2024-06-14 12:10:32,309 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 95 transitions. [2024-06-14 12:10:32,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 244 flow [2024-06-14 12:10:32,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 12:10:32,311 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-14 12:10:32,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-14 12:10:32,311 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-14 12:10:32,311 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-14 12:10:32,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:32,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:32,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:32,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 12:10:32,312 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 12:10:32,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:32,313 INFO L85 PathProgramCache]: Analyzing trace with hash 2003849064, now seen corresponding path program 1 times [2024-06-14 12:10:32,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:32,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56131835] [2024-06-14 12:10:32,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:32,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:32,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:33,187 INFO 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 12:10:33,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:33,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56131835] [2024-06-14 12:10:33,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56131835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:33,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:33,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:10:33,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40191700] [2024-06-14 12:10:33,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:33,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:10:33,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:33,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:10:33,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:10:33,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 12:10:33,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:33,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:33,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 12:10:33,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:33,559 INFO L124 PetriNetUnfolderBase]: 1641/2511 cut-off events. [2024-06-14 12:10:33,559 INFO L125 PetriNetUnfolderBase]: For 1285/1285 co-relation queries the response was YES. [2024-06-14 12:10:33,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6296 conditions, 2511 events. 1641/2511 cut-off events. For 1285/1285 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11943 event pairs, 746 based on Foata normal form. 3/2502 useless extension candidates. Maximal degree in co-relation 6279. Up to 2393 conditions per place. [2024-06-14 12:10:33,572 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 56 selfloop transitions, 13 changer transitions 0/73 dead transitions. [2024-06-14 12:10:33,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 73 transitions, 378 flow [2024-06-14 12:10:33,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:10:33,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:10:33,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-06-14 12:10:33,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-14 12:10:33,574 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 6 states and 132 transitions. [2024-06-14 12:10:33,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 73 transitions, 378 flow [2024-06-14 12:10:33,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 73 transitions, 358 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-14 12:10:33,576 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 196 flow [2024-06-14 12:10:33,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=196, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-06-14 12:10:33,577 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-14 12:10:33,577 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 196 flow [2024-06-14 12:10:33,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:33,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:33,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:33,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 12:10:33,578 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 12:10:33,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:33,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1989780140, now seen corresponding path program 1 times [2024-06-14 12:10:33,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:33,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690117800] [2024-06-14 12:10:33,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:33,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:33,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:34,321 INFO 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 12:10:34,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:34,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690117800] [2024-06-14 12:10:34,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690117800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:34,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:34,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:10:34,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039207593] [2024-06-14 12:10:34,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:34,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:10:34,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:34,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:10:34,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:10:34,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 12:10:34,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 196 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:34,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:34,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 12:10:34,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:34,798 INFO L124 PetriNetUnfolderBase]: 1632/2496 cut-off events. [2024-06-14 12:10:34,798 INFO L125 PetriNetUnfolderBase]: For 2539/2539 co-relation queries the response was YES. [2024-06-14 12:10:34,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6975 conditions, 2496 events. 1632/2496 cut-off events. For 2539/2539 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11804 event pairs, 582 based on Foata normal form. 6/2490 useless extension candidates. Maximal degree in co-relation 6956. Up to 2348 conditions per place. [2024-06-14 12:10:34,808 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 60 selfloop transitions, 15 changer transitions 0/79 dead transitions. [2024-06-14 12:10:34,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 79 transitions, 438 flow [2024-06-14 12:10:34,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:10:34,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:10:34,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 148 transitions. [2024-06-14 12:10:34,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5034013605442177 [2024-06-14 12:10:34,810 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 196 flow. Second operand 7 states and 148 transitions. [2024-06-14 12:10:34,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 79 transitions, 438 flow [2024-06-14 12:10:34,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 79 transitions, 410 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 12:10:34,813 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 217 flow [2024-06-14 12:10:34,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=217, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-14 12:10:34,814 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 11 predicate places. [2024-06-14 12:10:34,814 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 217 flow [2024-06-14 12:10:34,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:34,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:34,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:34,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 12:10:34,815 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 12:10:34,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:34,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1263716854, now seen corresponding path program 1 times [2024-06-14 12:10:34,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:34,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497717642] [2024-06-14 12:10:34,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:34,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:34,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:35,305 INFO 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 12:10:35,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:35,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497717642] [2024-06-14 12:10:35,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497717642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:35,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:35,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:10:35,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751010445] [2024-06-14 12:10:35,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:35,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:10:35,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:35,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:10:35,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:10:35,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:10:35,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 217 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:35,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:35,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:10:35,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:35,778 INFO L124 PetriNetUnfolderBase]: 1627/2501 cut-off events. [2024-06-14 12:10:35,778 INFO L125 PetriNetUnfolderBase]: For 3802/3802 co-relation queries the response was YES. [2024-06-14 12:10:35,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7410 conditions, 2501 events. 1627/2501 cut-off events. For 3802/3802 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 11854 event pairs, 689 based on Foata normal form. 2/2503 useless extension candidates. Maximal degree in co-relation 7390. Up to 2407 conditions per place. [2024-06-14 12:10:35,791 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 48 selfloop transitions, 8 changer transitions 0/60 dead transitions. [2024-06-14 12:10:35,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 60 transitions, 373 flow [2024-06-14 12:10:35,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:10:35,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:10:35,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-06-14 12:10:35,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-06-14 12:10:35,793 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 217 flow. Second operand 5 states and 92 transitions. [2024-06-14 12:10:35,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 60 transitions, 373 flow [2024-06-14 12:10:35,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 60 transitions, 334 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 12:10:35,796 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 224 flow [2024-06-14 12:10:35,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=224, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2024-06-14 12:10:35,797 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 11 predicate places. [2024-06-14 12:10:35,797 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 224 flow [2024-06-14 12:10:35,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:35,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:35,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:35,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 12:10:35,798 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:10:35,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:35,798 INFO L85 PathProgramCache]: Analyzing trace with hash 557161464, now seen corresponding path program 1 times [2024-06-14 12:10:35,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:35,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223056173] [2024-06-14 12:10:35,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:35,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:35,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:36,398 INFO 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 12:10:36,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:36,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223056173] [2024-06-14 12:10:36,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223056173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:36,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:36,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:10:36,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951307286] [2024-06-14 12:10:36,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:36,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:10:36,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:36,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:10:36,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:10:36,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:10:36,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 224 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:36,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:36,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:10:36,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:36,979 INFO L124 PetriNetUnfolderBase]: 1883/2795 cut-off events. [2024-06-14 12:10:36,979 INFO L125 PetriNetUnfolderBase]: For 6041/6041 co-relation queries the response was YES. [2024-06-14 12:10:36,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8905 conditions, 2795 events. 1883/2795 cut-off events. For 6041/6041 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 12579 event pairs, 763 based on Foata normal form. 6/2801 useless extension candidates. Maximal degree in co-relation 8883. Up to 2725 conditions per place. [2024-06-14 12:10:36,995 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 59 selfloop transitions, 17 changer transitions 0/79 dead transitions. [2024-06-14 12:10:36,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 79 transitions, 496 flow [2024-06-14 12:10:36,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:10:36,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:10:36,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-14 12:10:36,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-14 12:10:36,997 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 224 flow. Second operand 6 states and 111 transitions. [2024-06-14 12:10:36,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 79 transitions, 496 flow [2024-06-14 12:10:37,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 79 transitions, 474 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-14 12:10:37,001 INFO L231 Difference]: Finished difference. Result has 59 places, 60 transitions, 327 flow [2024-06-14 12:10:37,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=327, PETRI_PLACES=59, PETRI_TRANSITIONS=60} [2024-06-14 12:10:37,004 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-14 12:10:37,004 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 60 transitions, 327 flow [2024-06-14 12:10:37,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:37,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:37,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:37,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 12:10:37,005 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 12:10:37,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:37,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1044008201, now seen corresponding path program 1 times [2024-06-14 12:10:37,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:37,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911745063] [2024-06-14 12:10:37,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:37,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:37,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:37,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:37,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:37,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911745063] [2024-06-14 12:10:37,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911745063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:37,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:37,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:10:37,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907933027] [2024-06-14 12:10:37,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:37,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:10:37,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:37,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:10:37,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:10:37,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:10:37,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 60 transitions, 327 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 12:10:37,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:37,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:10:37,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:38,193 INFO L124 PetriNetUnfolderBase]: 1698/2615 cut-off events. [2024-06-14 12:10:38,193 INFO L125 PetriNetUnfolderBase]: For 8055/8073 co-relation queries the response was YES. [2024-06-14 12:10:38,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9210 conditions, 2615 events. 1698/2615 cut-off events. For 8055/8073 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12503 event pairs, 669 based on Foata normal form. 6/2607 useless extension candidates. Maximal degree in co-relation 9185. Up to 2456 conditions per place. [2024-06-14 12:10:38,210 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 63 selfloop transitions, 16 changer transitions 0/86 dead transitions. [2024-06-14 12:10:38,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 86 transitions, 607 flow [2024-06-14 12:10:38,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:10:38,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:10:38,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-14 12:10:38,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45634920634920634 [2024-06-14 12:10:38,212 INFO L175 Difference]: Start difference. First operand has 59 places, 60 transitions, 327 flow. Second operand 6 states and 115 transitions. [2024-06-14 12:10:38,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 86 transitions, 607 flow [2024-06-14 12:10:38,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 86 transitions, 591 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-14 12:10:38,216 INFO L231 Difference]: Finished difference. Result has 64 places, 66 transitions, 405 flow [2024-06-14 12:10:38,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=405, PETRI_PLACES=64, PETRI_TRANSITIONS=66} [2024-06-14 12:10:38,218 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-06-14 12:10:38,218 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 66 transitions, 405 flow [2024-06-14 12:10:38,218 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 12:10:38,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:38,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:38,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 12:10:38,219 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 12:10:38,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:38,219 INFO L85 PathProgramCache]: Analyzing trace with hash 130675729, now seen corresponding path program 2 times [2024-06-14 12:10:38,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:38,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860991455] [2024-06-14 12:10:38,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:38,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:38,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:38,782 INFO 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 12:10:38,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:38,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860991455] [2024-06-14 12:10:38,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860991455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:38,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:38,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:10:38,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020069956] [2024-06-14 12:10:38,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:38,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:10:38,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:38,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:10:38,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:10:38,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:10:38,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 66 transitions, 405 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 12:10:38,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:38,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:10:38,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:39,264 INFO L124 PetriNetUnfolderBase]: 1693/2607 cut-off events. [2024-06-14 12:10:39,264 INFO L125 PetriNetUnfolderBase]: For 10161/10175 co-relation queries the response was YES. [2024-06-14 12:10:39,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9745 conditions, 2607 events. 1693/2607 cut-off events. For 10161/10175 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12404 event pairs, 665 based on Foata normal form. 2/2595 useless extension candidates. Maximal degree in co-relation 9717. Up to 2475 conditions per place. [2024-06-14 12:10:39,276 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 63 selfloop transitions, 11 changer transitions 0/81 dead transitions. [2024-06-14 12:10:39,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 81 transitions, 591 flow [2024-06-14 12:10:39,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:10:39,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:10:39,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-14 12:10:39,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 12:10:39,279 INFO L175 Difference]: Start difference. First operand has 64 places, 66 transitions, 405 flow. Second operand 6 states and 108 transitions. [2024-06-14 12:10:39,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 81 transitions, 591 flow [2024-06-14 12:10:39,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 81 transitions, 549 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-14 12:10:39,288 INFO L231 Difference]: Finished difference. Result has 68 places, 66 transitions, 393 flow [2024-06-14 12:10:39,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=393, PETRI_PLACES=68, PETRI_TRANSITIONS=66} [2024-06-14 12:10:39,290 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 25 predicate places. [2024-06-14 12:10:39,290 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 66 transitions, 393 flow [2024-06-14 12:10:39,290 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 12:10:39,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:39,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:39,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 12:10:39,291 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:10:39,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:39,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1824663275, now seen corresponding path program 1 times [2024-06-14 12:10:39,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:39,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541829596] [2024-06-14 12:10:39,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:39,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:39,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:40,053 INFO 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 12:10:40,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:40,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541829596] [2024-06-14 12:10:40,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541829596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:40,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:40,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:10:40,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008891968] [2024-06-14 12:10:40,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:40,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:10:40,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:40,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:10:40,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:10:40,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:10:40,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 66 transitions, 393 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 12:10:40,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:40,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:10:40,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:40,602 INFO L124 PetriNetUnfolderBase]: 1706/2625 cut-off events. [2024-06-14 12:10:40,602 INFO L125 PetriNetUnfolderBase]: For 11692/11706 co-relation queries the response was YES. [2024-06-14 12:10:40,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9939 conditions, 2625 events. 1706/2625 cut-off events. For 11692/11706 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12478 event pairs, 647 based on Foata normal form. 2/2612 useless extension candidates. Maximal degree in co-relation 9909. Up to 2473 conditions per place. [2024-06-14 12:10:40,616 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 73 selfloop transitions, 14 changer transitions 0/94 dead transitions. [2024-06-14 12:10:40,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 94 transitions, 659 flow [2024-06-14 12:10:40,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:10:40,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:10:40,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-14 12:10:40,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-14 12:10:40,617 INFO L175 Difference]: Start difference. First operand has 68 places, 66 transitions, 393 flow. Second operand 7 states and 130 transitions. [2024-06-14 12:10:40,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 94 transitions, 659 flow [2024-06-14 12:10:40,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 94 transitions, 625 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 12:10:40,628 INFO L231 Difference]: Finished difference. Result has 69 places, 69 transitions, 429 flow [2024-06-14 12:10:40,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=429, PETRI_PLACES=69, PETRI_TRANSITIONS=69} [2024-06-14 12:10:40,629 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 26 predicate places. [2024-06-14 12:10:40,629 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 69 transitions, 429 flow [2024-06-14 12:10:40,630 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 12:10:40,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:40,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:40,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 12:10:40,630 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 12:10:40,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:40,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1824783431, now seen corresponding path program 1 times [2024-06-14 12:10:40,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:40,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73694438] [2024-06-14 12:10:40,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:40,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:40,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:41,411 INFO 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 12:10:41,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:41,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73694438] [2024-06-14 12:10:41,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73694438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:41,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:41,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:10:41,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632832353] [2024-06-14 12:10:41,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:41,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:10:41,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:41,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:10:41,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:10:41,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:10:41,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 69 transitions, 429 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:41,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:41,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:10:41,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:41,945 INFO L124 PetriNetUnfolderBase]: 1984/2941 cut-off events. [2024-06-14 12:10:41,945 INFO L125 PetriNetUnfolderBase]: For 16941/16941 co-relation queries the response was YES. [2024-06-14 12:10:41,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11927 conditions, 2941 events. 1984/2941 cut-off events. For 16941/16941 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 13293 event pairs, 682 based on Foata normal form. 6/2947 useless extension candidates. Maximal degree in co-relation 11897. Up to 2747 conditions per place. [2024-06-14 12:10:41,957 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 87 selfloop transitions, 28 changer transitions 0/118 dead transitions. [2024-06-14 12:10:41,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 118 transitions, 937 flow [2024-06-14 12:10:41,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:10:41,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:10:41,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-14 12:10:41,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-14 12:10:41,958 INFO L175 Difference]: Start difference. First operand has 69 places, 69 transitions, 429 flow. Second operand 7 states and 137 transitions. [2024-06-14 12:10:41,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 118 transitions, 937 flow [2024-06-14 12:10:41,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 118 transitions, 891 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-14 12:10:41,966 INFO L231 Difference]: Finished difference. Result has 74 places, 86 transitions, 604 flow [2024-06-14 12:10:41,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=604, PETRI_PLACES=74, PETRI_TRANSITIONS=86} [2024-06-14 12:10:41,966 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 31 predicate places. [2024-06-14 12:10:41,967 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 86 transitions, 604 flow [2024-06-14 12:10:41,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:41,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:41,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:41,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 12:10:41,967 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 12:10:41,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:41,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1445364259, now seen corresponding path program 2 times [2024-06-14 12:10:41,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:41,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507791663] [2024-06-14 12:10:41,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:41,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:41,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:42,596 INFO 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 12:10:42,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:42,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507791663] [2024-06-14 12:10:42,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507791663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:42,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:42,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:10:42,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897282410] [2024-06-14 12:10:42,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:42,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:10:42,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:42,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:10:42,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:10:42,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:10:42,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 86 transitions, 604 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 12:10:42,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:42,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:10:42,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:43,107 INFO L124 PetriNetUnfolderBase]: 1831/2791 cut-off events. [2024-06-14 12:10:43,107 INFO L125 PetriNetUnfolderBase]: For 19489/19521 co-relation queries the response was YES. [2024-06-14 12:10:43,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12434 conditions, 2791 events. 1831/2791 cut-off events. For 19489/19521 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 13144 event pairs, 623 based on Foata normal form. 6/2772 useless extension candidates. Maximal degree in co-relation 12400. Up to 2576 conditions per place. [2024-06-14 12:10:43,124 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 78 selfloop transitions, 26 changer transitions 0/116 dead transitions. [2024-06-14 12:10:43,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 116 transitions, 988 flow [2024-06-14 12:10:43,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:10:43,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:10:43,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-14 12:10:43,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-14 12:10:43,126 INFO L175 Difference]: Start difference. First operand has 74 places, 86 transitions, 604 flow. Second operand 7 states and 133 transitions. [2024-06-14 12:10:43,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 116 transitions, 988 flow [2024-06-14 12:10:43,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 116 transitions, 952 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-06-14 12:10:43,140 INFO L231 Difference]: Finished difference. Result has 80 places, 92 transitions, 710 flow [2024-06-14 12:10:43,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=568, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=710, PETRI_PLACES=80, PETRI_TRANSITIONS=92} [2024-06-14 12:10:43,140 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 37 predicate places. [2024-06-14 12:10:43,140 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 92 transitions, 710 flow [2024-06-14 12:10:43,140 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 12:10:43,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:43,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:43,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 12:10:43,141 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 12:10:43,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:43,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1398084339, now seen corresponding path program 2 times [2024-06-14 12:10:43,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:43,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709492976] [2024-06-14 12:10:43,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:43,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:43,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:43,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:43,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:43,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709492976] [2024-06-14 12:10:43,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709492976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:43,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:43,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:10:43,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760844248] [2024-06-14 12:10:43,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:43,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:10:43,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:43,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:10:43,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:10:43,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:10:43,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 92 transitions, 710 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:43,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:43,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:10:43,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:44,384 INFO L124 PetriNetUnfolderBase]: 2031/3007 cut-off events. [2024-06-14 12:10:44,384 INFO L125 PetriNetUnfolderBase]: For 26534/26534 co-relation queries the response was YES. [2024-06-14 12:10:44,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14278 conditions, 3007 events. 2031/3007 cut-off events. For 26534/26534 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 13571 event pairs, 702 based on Foata normal form. 6/3013 useless extension candidates. Maximal degree in co-relation 14241. Up to 2931 conditions per place. [2024-06-14 12:10:44,401 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 96 selfloop transitions, 21 changer transitions 0/120 dead transitions. [2024-06-14 12:10:44,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 120 transitions, 1094 flow [2024-06-14 12:10:44,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:10:44,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:10:44,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-14 12:10:44,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 12:10:44,402 INFO L175 Difference]: Start difference. First operand has 80 places, 92 transitions, 710 flow. Second operand 7 states and 126 transitions. [2024-06-14 12:10:44,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 120 transitions, 1094 flow [2024-06-14 12:10:44,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 120 transitions, 1042 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-14 12:10:44,420 INFO L231 Difference]: Finished difference. Result has 85 places, 98 transitions, 775 flow [2024-06-14 12:10:44,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=658, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=775, PETRI_PLACES=85, PETRI_TRANSITIONS=98} [2024-06-14 12:10:44,421 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 42 predicate places. [2024-06-14 12:10:44,421 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 98 transitions, 775 flow [2024-06-14 12:10:44,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:44,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:44,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:44,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 12:10:44,422 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 12:10:44,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:44,422 INFO L85 PathProgramCache]: Analyzing trace with hash 2001914951, now seen corresponding path program 3 times [2024-06-14 12:10:44,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:44,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600798642] [2024-06-14 12:10:44,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:44,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:44,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:45,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:45,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:45,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600798642] [2024-06-14 12:10:45,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600798642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:45,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:45,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:10:45,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178033837] [2024-06-14 12:10:45,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:45,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:10:45,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:45,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:10:45,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:10:45,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:10:45,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 98 transitions, 775 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:45,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:45,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:10:45,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:45,643 INFO L124 PetriNetUnfolderBase]: 2035/3013 cut-off events. [2024-06-14 12:10:45,643 INFO L125 PetriNetUnfolderBase]: For 29761/29761 co-relation queries the response was YES. [2024-06-14 12:10:45,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14738 conditions, 3013 events. 2035/3013 cut-off events. For 29761/29761 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13651 event pairs, 702 based on Foata normal form. 6/3019 useless extension candidates. Maximal degree in co-relation 14698. Up to 2877 conditions per place. [2024-06-14 12:10:45,657 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 99 selfloop transitions, 27 changer transitions 0/129 dead transitions. [2024-06-14 12:10:45,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 129 transitions, 1238 flow [2024-06-14 12:10:45,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:10:45,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:10:45,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-14 12:10:45,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-14 12:10:45,659 INFO L175 Difference]: Start difference. First operand has 85 places, 98 transitions, 775 flow. Second operand 7 states and 129 transitions. [2024-06-14 12:10:45,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 129 transitions, 1238 flow [2024-06-14 12:10:45,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 129 transitions, 1183 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-14 12:10:45,674 INFO L231 Difference]: Finished difference. Result has 89 places, 105 transitions, 882 flow [2024-06-14 12:10:45,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=720, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=882, PETRI_PLACES=89, PETRI_TRANSITIONS=105} [2024-06-14 12:10:45,675 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-14 12:10:45,675 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 105 transitions, 882 flow [2024-06-14 12:10:45,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:45,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:45,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:45,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 12:10:45,676 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 12:10:45,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:45,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1438935169, now seen corresponding path program 3 times [2024-06-14 12:10:45,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:45,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907854737] [2024-06-14 12:10:45,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:45,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:45,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:46,403 INFO 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 12:10:46,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:46,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907854737] [2024-06-14 12:10:46,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907854737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:46,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:46,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:10:46,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355758276] [2024-06-14 12:10:46,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:46,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:10:46,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:46,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:10:46,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:10:46,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:10:46,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 105 transitions, 882 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 12:10:46,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:46,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:10:46,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:46,967 INFO L124 PetriNetUnfolderBase]: 1860/2835 cut-off events. [2024-06-14 12:10:46,967 INFO L125 PetriNetUnfolderBase]: For 30160/30180 co-relation queries the response was YES. [2024-06-14 12:10:46,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14108 conditions, 2835 events. 1860/2835 cut-off events. For 30160/30180 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13371 event pairs, 613 based on Foata normal form. 2/2815 useless extension candidates. Maximal degree in co-relation 14067. Up to 2672 conditions per place. [2024-06-14 12:10:46,982 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 95 selfloop transitions, 14 changer transitions 0/124 dead transitions. [2024-06-14 12:10:46,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 124 transitions, 1148 flow [2024-06-14 12:10:46,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:10:46,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:10:46,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-14 12:10:46,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-14 12:10:46,984 INFO L175 Difference]: Start difference. First operand has 89 places, 105 transitions, 882 flow. Second operand 7 states and 124 transitions. [2024-06-14 12:10:46,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 124 transitions, 1148 flow [2024-06-14 12:10:47,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 124 transitions, 1077 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-14 12:10:47,005 INFO L231 Difference]: Finished difference. Result has 93 places, 105 transitions, 847 flow [2024-06-14 12:10:47,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=847, PETRI_PLACES=93, PETRI_TRANSITIONS=105} [2024-06-14 12:10:47,005 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 50 predicate places. [2024-06-14 12:10:47,005 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 105 transitions, 847 flow [2024-06-14 12:10:47,006 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 12:10:47,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:47,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:47,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 12:10:47,006 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 12:10:47,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:47,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1438688905, now seen corresponding path program 1 times [2024-06-14 12:10:47,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:47,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419634777] [2024-06-14 12:10:47,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:47,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:47,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:47,841 INFO 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 12:10:47,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:47,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419634777] [2024-06-14 12:10:47,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419634777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:47,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:47,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:10:47,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143112131] [2024-06-14 12:10:47,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:47,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:10:47,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:47,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:10:47,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:10:47,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:10:47,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 105 transitions, 847 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:47,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:47,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:10:47,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:48,528 INFO L124 PetriNetUnfolderBase]: 2033/3011 cut-off events. [2024-06-14 12:10:48,528 INFO L125 PetriNetUnfolderBase]: For 36830/36830 co-relation queries the response was YES. [2024-06-14 12:10:48,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15416 conditions, 3011 events. 2033/3011 cut-off events. For 36830/36830 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13600 event pairs, 679 based on Foata normal form. 6/3017 useless extension candidates. Maximal degree in co-relation 15373. Up to 2915 conditions per place. [2024-06-14 12:10:48,546 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 102 selfloop transitions, 25 changer transitions 0/130 dead transitions. [2024-06-14 12:10:48,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 130 transitions, 1251 flow [2024-06-14 12:10:48,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:10:48,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:10:48,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-14 12:10:48,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-14 12:10:48,565 INFO L175 Difference]: Start difference. First operand has 93 places, 105 transitions, 847 flow. Second operand 7 states and 127 transitions. [2024-06-14 12:10:48,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 130 transitions, 1251 flow [2024-06-14 12:10:48,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 130 transitions, 1207 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 12:10:48,587 INFO L231 Difference]: Finished difference. Result has 94 places, 108 transitions, 907 flow [2024-06-14 12:10:48,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=803, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=907, PETRI_PLACES=94, PETRI_TRANSITIONS=108} [2024-06-14 12:10:48,589 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 51 predicate places. [2024-06-14 12:10:48,589 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 108 transitions, 907 flow [2024-06-14 12:10:48,589 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 12:10:48,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:48,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:48,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 12:10:48,590 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:10:48,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:48,590 INFO L85 PathProgramCache]: Analyzing trace with hash 811864944, now seen corresponding path program 1 times [2024-06-14 12:10:48,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:48,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066156675] [2024-06-14 12:10:48,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:48,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:48,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:49,140 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 12:10:49,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:49,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066156675] [2024-06-14 12:10:49,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066156675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:49,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:49,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:10:49,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640701858] [2024-06-14 12:10:49,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:49,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:10:49,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:49,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:10:49,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:10:49,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:10:49,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 108 transitions, 907 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:49,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:49,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:10:49,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:49,647 INFO L124 PetriNetUnfolderBase]: 1904/2881 cut-off events. [2024-06-14 12:10:49,648 INFO L125 PetriNetUnfolderBase]: For 40030/40030 co-relation queries the response was YES. [2024-06-14 12:10:49,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15333 conditions, 2881 events. 1904/2881 cut-off events. For 40030/40030 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13420 event pairs, 703 based on Foata normal form. 1/2882 useless extension candidates. Maximal degree in co-relation 15289. Up to 2769 conditions per place. [2024-06-14 12:10:49,720 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 95 selfloop transitions, 8 changer transitions 0/116 dead transitions. [2024-06-14 12:10:49,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 116 transitions, 1133 flow [2024-06-14 12:10:49,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:10:49,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:10:49,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-06-14 12:10:49,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-14 12:10:49,721 INFO L175 Difference]: Start difference. First operand has 94 places, 108 transitions, 907 flow. Second operand 5 states and 88 transitions. [2024-06-14 12:10:49,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 116 transitions, 1133 flow [2024-06-14 12:10:49,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 116 transitions, 1045 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 12:10:49,740 INFO L231 Difference]: Finished difference. Result has 94 places, 108 transitions, 841 flow [2024-06-14 12:10:49,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=819, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=841, PETRI_PLACES=94, PETRI_TRANSITIONS=108} [2024-06-14 12:10:49,740 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 51 predicate places. [2024-06-14 12:10:49,740 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 108 transitions, 841 flow [2024-06-14 12:10:49,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:49,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:49,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:49,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 12:10:49,741 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 12:10:49,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:49,742 INFO L85 PathProgramCache]: Analyzing trace with hash 729898036, now seen corresponding path program 1 times [2024-06-14 12:10:49,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:49,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483425022] [2024-06-14 12:10:49,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:49,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:49,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:50,700 INFO 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 12:10:50,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:50,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483425022] [2024-06-14 12:10:50,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483425022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:50,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:50,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:10:50,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863216173] [2024-06-14 12:10:50,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:50,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:10:50,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:50,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:10:50,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:10:50,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:10:50,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 108 transitions, 841 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 12:10:50,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:50,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:10:50,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:51,449 INFO L124 PetriNetUnfolderBase]: 1888/2870 cut-off events. [2024-06-14 12:10:51,450 INFO L125 PetriNetUnfolderBase]: For 43029/43043 co-relation queries the response was YES. [2024-06-14 12:10:51,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15309 conditions, 2870 events. 1888/2870 cut-off events. For 43029/43043 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13467 event pairs, 619 based on Foata normal form. 6/2865 useless extension candidates. Maximal degree in co-relation 15264. Up to 2658 conditions per place. [2024-06-14 12:10:51,467 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 111 selfloop transitions, 20 changer transitions 0/147 dead transitions. [2024-06-14 12:10:51,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 147 transitions, 1243 flow [2024-06-14 12:10:51,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:10:51,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:10:51,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 12:10:51,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-14 12:10:51,469 INFO L175 Difference]: Start difference. First operand has 94 places, 108 transitions, 841 flow. Second operand 9 states and 165 transitions. [2024-06-14 12:10:51,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 147 transitions, 1243 flow [2024-06-14 12:10:51,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 147 transitions, 1221 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-14 12:10:51,492 INFO L231 Difference]: Finished difference. Result has 99 places, 111 transitions, 922 flow [2024-06-14 12:10:51,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=819, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=922, PETRI_PLACES=99, PETRI_TRANSITIONS=111} [2024-06-14 12:10:51,493 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 56 predicate places. [2024-06-14 12:10:51,493 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 111 transitions, 922 flow [2024-06-14 12:10:51,493 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 12:10:51,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:51,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:51,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 12:10:51,493 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:10:51,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:51,494 INFO L85 PathProgramCache]: Analyzing trace with hash 729988401, now seen corresponding path program 1 times [2024-06-14 12:10:51,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:51,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189981402] [2024-06-14 12:10:51,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:51,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:51,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:52,270 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 12:10:52,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:52,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189981402] [2024-06-14 12:10:52,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189981402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:52,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:52,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:10:52,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191805556] [2024-06-14 12:10:52,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:52,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:10:52,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:52,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:10:52,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:10:52,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:10:52,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 111 transitions, 922 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 12:10:52,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:52,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:10:52,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:52,875 INFO L124 PetriNetUnfolderBase]: 2101/3108 cut-off events. [2024-06-14 12:10:52,875 INFO L125 PetriNetUnfolderBase]: For 50527/50527 co-relation queries the response was YES. [2024-06-14 12:10:52,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17228 conditions, 3108 events. 2101/3108 cut-off events. For 50527/50527 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 14090 event pairs, 670 based on Foata normal form. 6/3114 useless extension candidates. Maximal degree in co-relation 17183. Up to 2996 conditions per place. [2024-06-14 12:10:52,893 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 126 selfloop transitions, 27 changer transitions 0/156 dead transitions. [2024-06-14 12:10:52,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 156 transitions, 1540 flow [2024-06-14 12:10:52,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:10:52,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:10:52,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 12:10:52,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-14 12:10:52,898 INFO L175 Difference]: Start difference. First operand has 99 places, 111 transitions, 922 flow. Second operand 8 states and 150 transitions. [2024-06-14 12:10:52,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 156 transitions, 1540 flow [2024-06-14 12:10:52,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 156 transitions, 1463 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-14 12:10:52,926 INFO L231 Difference]: Finished difference. Result has 102 places, 122 transitions, 1059 flow [2024-06-14 12:10:52,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=845, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1059, PETRI_PLACES=102, PETRI_TRANSITIONS=122} [2024-06-14 12:10:52,927 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 59 predicate places. [2024-06-14 12:10:52,927 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 122 transitions, 1059 flow [2024-06-14 12:10:52,927 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 12:10:52,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:52,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:52,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 12:10:52,927 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 12:10:52,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:52,928 INFO L85 PathProgramCache]: Analyzing trace with hash 733713051, now seen corresponding path program 2 times [2024-06-14 12:10:52,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:52,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147337179] [2024-06-14 12:10:52,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:52,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:52,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:53,599 INFO 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 12:10:53,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:53,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147337179] [2024-06-14 12:10:53,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147337179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:53,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:53,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:10:53,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957271401] [2024-06-14 12:10:53,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:53,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:10:53,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:53,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:10:53,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:10:53,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:10:53,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 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 12:10:53,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:53,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:10:53,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:54,176 INFO L124 PetriNetUnfolderBase]: 2233/3297 cut-off events. [2024-06-14 12:10:54,176 INFO L125 PetriNetUnfolderBase]: For 61682/61684 co-relation queries the response was YES. [2024-06-14 12:10:54,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19474 conditions, 3297 events. 2233/3297 cut-off events. For 61682/61684 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 15080 event pairs, 653 based on Foata normal form. 8/3305 useless extension candidates. Maximal degree in co-relation 19426. Up to 2811 conditions per place. [2024-06-14 12:10:54,231 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 110 selfloop transitions, 62 changer transitions 0/175 dead transitions. [2024-06-14 12:10:54,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 175 transitions, 1957 flow [2024-06-14 12:10:54,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:10:54,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:10:54,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-14 12:10:54,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732142857142857 [2024-06-14 12:10:54,242 INFO L175 Difference]: Start difference. First operand has 102 places, 122 transitions, 1059 flow. Second operand 8 states and 159 transitions. [2024-06-14 12:10:54,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 175 transitions, 1957 flow [2024-06-14 12:10:54,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 175 transitions, 1839 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-14 12:10:54,275 INFO L231 Difference]: Finished difference. Result has 108 places, 137 transitions, 1324 flow [2024-06-14 12:10:54,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=941, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1324, PETRI_PLACES=108, PETRI_TRANSITIONS=137} [2024-06-14 12:10:54,276 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 65 predicate places. [2024-06-14 12:10:54,276 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 137 transitions, 1324 flow [2024-06-14 12:10:54,277 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 12:10:54,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:54,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:54,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 12:10:54,277 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 12:10:54,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:54,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1770908655, now seen corresponding path program 3 times [2024-06-14 12:10:54,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:54,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863625952] [2024-06-14 12:10:54,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:54,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:54,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:55,007 INFO 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 12:10:55,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:55,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863625952] [2024-06-14 12:10:55,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863625952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:55,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:55,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:10:55,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128443496] [2024-06-14 12:10:55,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:55,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:10:55,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:55,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:10:55,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:10:55,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:10:55,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 137 transitions, 1324 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 12:10:55,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:55,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:10:55,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:55,604 INFO L124 PetriNetUnfolderBase]: 2221/3281 cut-off events. [2024-06-14 12:10:55,604 INFO L125 PetriNetUnfolderBase]: For 69535/69537 co-relation queries the response was YES. [2024-06-14 12:10:55,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20436 conditions, 3281 events. 2221/3281 cut-off events. For 69535/69537 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 14999 event pairs, 657 based on Foata normal form. 8/3289 useless extension candidates. Maximal degree in co-relation 20385. Up to 2805 conditions per place. [2024-06-14 12:10:55,624 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 114 selfloop transitions, 57 changer transitions 0/174 dead transitions. [2024-06-14 12:10:55,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 174 transitions, 2004 flow [2024-06-14 12:10:55,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:10:55,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:10:55,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-14 12:10:55,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-14 12:10:55,626 INFO L175 Difference]: Start difference. First operand has 108 places, 137 transitions, 1324 flow. Second operand 8 states and 158 transitions. [2024-06-14 12:10:55,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 174 transitions, 2004 flow [2024-06-14 12:10:55,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 174 transitions, 1875 flow, removed 58 selfloop flow, removed 2 redundant places. [2024-06-14 12:10:55,678 INFO L231 Difference]: Finished difference. Result has 114 places, 137 transitions, 1323 flow [2024-06-14 12:10:55,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1199, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1323, PETRI_PLACES=114, PETRI_TRANSITIONS=137} [2024-06-14 12:10:55,679 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 71 predicate places. [2024-06-14 12:10:55,679 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 137 transitions, 1323 flow [2024-06-14 12:10:55,679 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 12:10:55,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:55,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:55,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 12:10:55,680 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 12:10:55,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:55,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1770908810, now seen corresponding path program 2 times [2024-06-14 12:10:55,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:55,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430948963] [2024-06-14 12:10:55,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:55,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:55,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:56,605 INFO 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 12:10:56,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:56,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430948963] [2024-06-14 12:10:56,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430948963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:56,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:56,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:10:56,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080315630] [2024-06-14 12:10:56,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:56,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:10:56,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:56,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:10:56,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:10:56,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:10:56,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 137 transitions, 1323 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 12:10:56,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:56,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:10:56,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:57,287 INFO L124 PetriNetUnfolderBase]: 2102/3166 cut-off events. [2024-06-14 12:10:57,287 INFO L125 PetriNetUnfolderBase]: For 69650/69672 co-relation queries the response was YES. [2024-06-14 12:10:57,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19527 conditions, 3166 events. 2102/3166 cut-off events. For 69650/69672 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 14908 event pairs, 640 based on Foata normal form. 12/3167 useless extension candidates. Maximal degree in co-relation 19474. Up to 2895 conditions per place. [2024-06-14 12:10:57,308 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 114 selfloop transitions, 29 changer transitions 0/166 dead transitions. [2024-06-14 12:10:57,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 166 transitions, 1735 flow [2024-06-14 12:10:57,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:10:57,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:10:57,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 12:10:57,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-14 12:10:57,310 INFO L175 Difference]: Start difference. First operand has 114 places, 137 transitions, 1323 flow. Second operand 8 states and 147 transitions. [2024-06-14 12:10:57,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 166 transitions, 1735 flow [2024-06-14 12:10:57,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 166 transitions, 1574 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-14 12:10:57,353 INFO L231 Difference]: Finished difference. Result has 114 places, 140 transitions, 1294 flow [2024-06-14 12:10:57,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1162, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1294, PETRI_PLACES=114, PETRI_TRANSITIONS=140} [2024-06-14 12:10:57,353 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 71 predicate places. [2024-06-14 12:10:57,353 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 140 transitions, 1294 flow [2024-06-14 12:10:57,354 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 12:10:57,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:57,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:57,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 12:10:57,354 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 12:10:57,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:57,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1025580777, now seen corresponding path program 4 times [2024-06-14 12:10:57,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:57,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498264661] [2024-06-14 12:10:57,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:57,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:57,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:58,003 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 12:10:58,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:58,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498264661] [2024-06-14 12:10:58,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498264661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:58,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:58,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:10:58,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849790444] [2024-06-14 12:10:58,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:58,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:10:58,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:58,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:10:58,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:10:58,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:10:58,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 140 transitions, 1294 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 12:10:58,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:58,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:10:58,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:58,606 INFO L124 PetriNetUnfolderBase]: 2268/3347 cut-off events. [2024-06-14 12:10:58,606 INFO L125 PetriNetUnfolderBase]: For 78622/78622 co-relation queries the response was YES. [2024-06-14 12:10:58,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20848 conditions, 3347 events. 2268/3347 cut-off events. For 78622/78622 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 15290 event pairs, 689 based on Foata normal form. 6/3353 useless extension candidates. Maximal degree in co-relation 20796. Up to 3239 conditions per place. [2024-06-14 12:10:58,626 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 142 selfloop transitions, 25 changer transitions 0/170 dead transitions. [2024-06-14 12:10:58,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 170 transitions, 1806 flow [2024-06-14 12:10:58,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:10:58,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:10:58,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 12:10:58,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-14 12:10:58,628 INFO L175 Difference]: Start difference. First operand has 114 places, 140 transitions, 1294 flow. Second operand 8 states and 142 transitions. [2024-06-14 12:10:58,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 170 transitions, 1806 flow [2024-06-14 12:10:58,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 170 transitions, 1698 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-14 12:10:58,675 INFO L231 Difference]: Finished difference. Result has 116 places, 144 transitions, 1321 flow [2024-06-14 12:10:58,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1186, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1321, PETRI_PLACES=116, PETRI_TRANSITIONS=144} [2024-06-14 12:10:58,675 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 73 predicate places. [2024-06-14 12:10:58,675 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 144 transitions, 1321 flow [2024-06-14 12:10:58,676 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 12:10:58,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:58,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:58,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 12:10:58,676 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 12:10:58,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:58,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1937182182, now seen corresponding path program 1 times [2024-06-14 12:10:58,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:58,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724767856] [2024-06-14 12:10:58,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:58,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:58,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:59,447 INFO 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 12:10:59,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:59,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724767856] [2024-06-14 12:10:59,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724767856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:59,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:59,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:10:59,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138088201] [2024-06-14 12:10:59,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:59,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:10:59,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:59,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:10:59,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:10:59,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:10:59,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 144 transitions, 1321 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 12:10:59,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:59,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:10:59,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:00,123 INFO L124 PetriNetUnfolderBase]: 2270/3350 cut-off events. [2024-06-14 12:11:00,124 INFO L125 PetriNetUnfolderBase]: For 83623/83623 co-relation queries the response was YES. [2024-06-14 12:11:00,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21173 conditions, 3350 events. 2270/3350 cut-off events. For 83623/83623 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 15339 event pairs, 674 based on Foata normal form. 3/3353 useless extension candidates. Maximal degree in co-relation 21120. Up to 3243 conditions per place. [2024-06-14 12:11:00,146 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 136 selfloop transitions, 30 changer transitions 0/169 dead transitions. [2024-06-14 12:11:00,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 169 transitions, 1815 flow [2024-06-14 12:11:00,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:11:00,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:11:00,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-14 12:11:00,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-14 12:11:00,147 INFO L175 Difference]: Start difference. First operand has 116 places, 144 transitions, 1321 flow. Second operand 7 states and 127 transitions. [2024-06-14 12:11:00,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 169 transitions, 1815 flow [2024-06-14 12:11:00,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 169 transitions, 1716 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-14 12:11:00,204 INFO L231 Difference]: Finished difference. Result has 117 places, 148 transitions, 1368 flow [2024-06-14 12:11:00,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1222, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1368, PETRI_PLACES=117, PETRI_TRANSITIONS=148} [2024-06-14 12:11:00,205 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 74 predicate places. [2024-06-14 12:11:00,205 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 148 transitions, 1368 flow [2024-06-14 12:11:00,205 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 12:11:00,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:00,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:00,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 12:11:00,205 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 12:11:00,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:00,206 INFO L85 PathProgramCache]: Analyzing trace with hash 877597846, now seen corresponding path program 3 times [2024-06-14 12:11:00,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:00,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415525310] [2024-06-14 12:11:00,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:00,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:00,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:00,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:00,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:00,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415525310] [2024-06-14 12:11:00,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415525310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:00,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:00,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:11:00,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559108221] [2024-06-14 12:11:00,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:00,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:11:00,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:00,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:11:00,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:11:01,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:11:01,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 148 transitions, 1368 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 12:11:01,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:01,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:11:01,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:01,569 INFO L124 PetriNetUnfolderBase]: 2130/3208 cut-off events. [2024-06-14 12:11:01,569 INFO L125 PetriNetUnfolderBase]: For 87272/87300 co-relation queries the response was YES. [2024-06-14 12:11:01,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20799 conditions, 3208 events. 2130/3208 cut-off events. For 87272/87300 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 15144 event pairs, 619 based on Foata normal form. 6/3203 useless extension candidates. Maximal degree in co-relation 20745. Up to 2986 conditions per place. [2024-06-14 12:11:01,590 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 132 selfloop transitions, 17 changer transitions 0/174 dead transitions. [2024-06-14 12:11:01,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 174 transitions, 1794 flow [2024-06-14 12:11:01,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:11:01,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:11:01,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 12:11:01,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-14 12:11:01,592 INFO L175 Difference]: Start difference. First operand has 117 places, 148 transitions, 1368 flow. Second operand 8 states and 140 transitions. [2024-06-14 12:11:01,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 174 transitions, 1794 flow [2024-06-14 12:11:01,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 174 transitions, 1700 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-14 12:11:01,656 INFO L231 Difference]: Finished difference. Result has 120 places, 151 transitions, 1392 flow [2024-06-14 12:11:01,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1274, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1392, PETRI_PLACES=120, PETRI_TRANSITIONS=151} [2024-06-14 12:11:01,656 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 77 predicate places. [2024-06-14 12:11:01,657 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 151 transitions, 1392 flow [2024-06-14 12:11:01,657 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 12:11:01,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:01,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:01,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 12:11:01,657 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 12:11:01,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:01,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1657315555, now seen corresponding path program 5 times [2024-06-14 12:11:01,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:01,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898063786] [2024-06-14 12:11:01,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:01,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:01,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:02,298 INFO 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 12:11:02,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:02,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898063786] [2024-06-14 12:11:02,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898063786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:02,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:02,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:11:02,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446470201] [2024-06-14 12:11:02,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:02,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:11:02,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:02,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:11:02,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:11:02,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:11:02,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 151 transitions, 1392 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 12:11:02,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:02,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:11:02,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:02,929 INFO L124 PetriNetUnfolderBase]: 2301/3395 cut-off events. [2024-06-14 12:11:02,929 INFO L125 PetriNetUnfolderBase]: For 98770/98770 co-relation queries the response was YES. [2024-06-14 12:11:02,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22471 conditions, 3395 events. 2301/3395 cut-off events. For 98770/98770 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 15567 event pairs, 668 based on Foata normal form. 6/3401 useless extension candidates. Maximal degree in co-relation 22416. Up to 3123 conditions per place. [2024-06-14 12:11:02,951 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 147 selfloop transitions, 37 changer transitions 0/187 dead transitions. [2024-06-14 12:11:02,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 187 transitions, 2174 flow [2024-06-14 12:11:02,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:11:02,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:11:02,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 12:11:02,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-14 12:11:02,953 INFO L175 Difference]: Start difference. First operand has 120 places, 151 transitions, 1392 flow. Second operand 8 states and 148 transitions. [2024-06-14 12:11:02,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 187 transitions, 2174 flow [2024-06-14 12:11:03,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 187 transitions, 2080 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-14 12:11:03,011 INFO L231 Difference]: Finished difference. Result has 123 places, 156 transitions, 1502 flow [2024-06-14 12:11:03,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1298, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1502, PETRI_PLACES=123, PETRI_TRANSITIONS=156} [2024-06-14 12:11:03,011 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 80 predicate places. [2024-06-14 12:11:03,011 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 156 transitions, 1502 flow [2024-06-14 12:11:03,012 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 12:11:03,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:03,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:03,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 12:11:03,012 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 12:11:03,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:03,012 INFO L85 PathProgramCache]: Analyzing trace with hash 877603581, now seen corresponding path program 6 times [2024-06-14 12:11:03,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:03,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931729979] [2024-06-14 12:11:03,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:03,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:03,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:03,604 INFO 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 12:11:03,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:03,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931729979] [2024-06-14 12:11:03,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931729979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:03,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:03,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:11:03,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636400452] [2024-06-14 12:11:03,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:03,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:11:03,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:03,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:11:03,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:11:03,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:11:03,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 156 transitions, 1502 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 12:11:03,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:03,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:11:03,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:04,239 INFO L124 PetriNetUnfolderBase]: 2305/3401 cut-off events. [2024-06-14 12:11:04,240 INFO L125 PetriNetUnfolderBase]: For 106195/106195 co-relation queries the response was YES. [2024-06-14 12:11:04,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23076 conditions, 3401 events. 2305/3401 cut-off events. For 106195/106195 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 15569 event pairs, 679 based on Foata normal form. 6/3407 useless extension candidates. Maximal degree in co-relation 23019. Up to 3132 conditions per place. [2024-06-14 12:11:04,265 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 144 selfloop transitions, 41 changer transitions 0/188 dead transitions. [2024-06-14 12:11:04,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 188 transitions, 2137 flow [2024-06-14 12:11:04,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:11:04,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:11:04,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 12:11:04,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-14 12:11:04,273 INFO L175 Difference]: Start difference. First operand has 123 places, 156 transitions, 1502 flow. Second operand 8 states and 147 transitions. [2024-06-14 12:11:04,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 188 transitions, 2137 flow [2024-06-14 12:11:04,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 188 transitions, 1939 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-14 12:11:04,340 INFO L231 Difference]: Finished difference. Result has 124 places, 160 transitions, 1488 flow [2024-06-14 12:11:04,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1320, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1488, PETRI_PLACES=124, PETRI_TRANSITIONS=160} [2024-06-14 12:11:04,341 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 81 predicate places. [2024-06-14 12:11:04,341 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 160 transitions, 1488 flow [2024-06-14 12:11:04,341 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 12:11:04,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:04,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:04,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 12:11:04,342 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:11:04,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:04,342 INFO L85 PathProgramCache]: Analyzing trace with hash -601988692, now seen corresponding path program 1 times [2024-06-14 12:11:04,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:04,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417790444] [2024-06-14 12:11:04,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:04,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:04,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:04,939 INFO 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 12:11:04,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:04,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417790444] [2024-06-14 12:11:04,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417790444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:04,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:04,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:11:04,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143804999] [2024-06-14 12:11:04,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:04,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:11:04,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:04,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:11:04,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:11:05,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:11:05,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 160 transitions, 1488 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 12:11:05,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:05,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:11:05,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:05,557 INFO L124 PetriNetUnfolderBase]: 2143/3212 cut-off events. [2024-06-14 12:11:05,558 INFO L125 PetriNetUnfolderBase]: For 109273/109297 co-relation queries the response was YES. [2024-06-14 12:11:05,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22043 conditions, 3212 events. 2143/3212 cut-off events. For 109273/109297 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 14986 event pairs, 661 based on Foata normal form. 3/3176 useless extension candidates. Maximal degree in co-relation 21986. Up to 3083 conditions per place. [2024-06-14 12:11:05,581 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 149 selfloop transitions, 11 changer transitions 0/174 dead transitions. [2024-06-14 12:11:05,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 174 transitions, 1862 flow [2024-06-14 12:11:05,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:11:05,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:11:05,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-14 12:11:05,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4087301587301587 [2024-06-14 12:11:05,582 INFO L175 Difference]: Start difference. First operand has 124 places, 160 transitions, 1488 flow. Second operand 6 states and 103 transitions. [2024-06-14 12:11:05,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 174 transitions, 1862 flow [2024-06-14 12:11:05,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 174 transitions, 1748 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-14 12:11:05,640 INFO L231 Difference]: Finished difference. Result has 125 places, 163 transitions, 1436 flow [2024-06-14 12:11:05,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1374, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1436, PETRI_PLACES=125, PETRI_TRANSITIONS=163} [2024-06-14 12:11:05,640 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 82 predicate places. [2024-06-14 12:11:05,641 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 163 transitions, 1436 flow [2024-06-14 12:11:05,641 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 12:11:05,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:05,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:05,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 12:11:05,641 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 12:11:05,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:05,642 INFO L85 PathProgramCache]: Analyzing trace with hash 818255208, now seen corresponding path program 1 times [2024-06-14 12:11:05,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:05,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040759585] [2024-06-14 12:11:05,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:05,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:05,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:06,639 INFO 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 12:11:06,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:06,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040759585] [2024-06-14 12:11:06,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040759585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:06,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:06,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:11:06,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650643117] [2024-06-14 12:11:06,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:06,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:11:06,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:06,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:11:06,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:11:06,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:11:06,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 163 transitions, 1436 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 12:11:06,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:06,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:11:06,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:07,486 INFO L124 PetriNetUnfolderBase]: 2198/3314 cut-off events. [2024-06-14 12:11:07,487 INFO L125 PetriNetUnfolderBase]: For 116625/116657 co-relation queries the response was YES. [2024-06-14 12:11:07,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22917 conditions, 3314 events. 2198/3314 cut-off events. For 116625/116657 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 15840 event pairs, 465 based on Foata normal form. 8/3311 useless extension candidates. Maximal degree in co-relation 22859. Up to 2974 conditions per place. [2024-06-14 12:11:07,508 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 159 selfloop transitions, 25 changer transitions 0/211 dead transitions. [2024-06-14 12:11:07,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 211 transitions, 2162 flow [2024-06-14 12:11:07,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:11:07,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:11:07,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-14 12:11:07,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-14 12:11:07,510 INFO L175 Difference]: Start difference. First operand has 125 places, 163 transitions, 1436 flow. Second operand 10 states and 185 transitions. [2024-06-14 12:11:07,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 211 transitions, 2162 flow [2024-06-14 12:11:07,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 211 transitions, 2120 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 12:11:07,581 INFO L231 Difference]: Finished difference. Result has 131 places, 167 transitions, 1599 flow [2024-06-14 12:11:07,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1394, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1599, PETRI_PLACES=131, PETRI_TRANSITIONS=167} [2024-06-14 12:11:07,582 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 88 predicate places. [2024-06-14 12:11:07,582 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 167 transitions, 1599 flow [2024-06-14 12:11:07,582 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 12:11:07,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:07,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:07,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 12:11:07,583 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 12:11:07,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:07,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1152004360, now seen corresponding path program 1 times [2024-06-14 12:11:07,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:07,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883021423] [2024-06-14 12:11:07,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:07,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:07,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:08,415 INFO 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 12:11:08,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:08,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883021423] [2024-06-14 12:11:08,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883021423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:08,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:08,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:11:08,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284329847] [2024-06-14 12:11:08,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:08,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:11:08,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:08,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:11:08,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:11:08,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:11:08,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 167 transitions, 1599 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 12:11:08,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:08,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:11:08,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:09,175 INFO L124 PetriNetUnfolderBase]: 2465/3635 cut-off events. [2024-06-14 12:11:09,175 INFO L125 PetriNetUnfolderBase]: For 133375/133375 co-relation queries the response was YES. [2024-06-14 12:11:09,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25726 conditions, 3635 events. 2465/3635 cut-off events. For 133375/133375 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 16952 event pairs, 634 based on Foata normal form. 6/3641 useless extension candidates. Maximal degree in co-relation 25667. Up to 3370 conditions per place. [2024-06-14 12:11:09,200 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 190 selfloop transitions, 41 changer transitions 0/234 dead transitions. [2024-06-14 12:11:09,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 234 transitions, 2807 flow [2024-06-14 12:11:09,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:11:09,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:11:09,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-14 12:11:09,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595238095238095 [2024-06-14 12:11:09,202 INFO L175 Difference]: Start difference. First operand has 131 places, 167 transitions, 1599 flow. Second operand 10 states and 193 transitions. [2024-06-14 12:11:09,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 234 transitions, 2807 flow [2024-06-14 12:11:09,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 234 transitions, 2693 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-14 12:11:09,287 INFO L231 Difference]: Finished difference. Result has 137 places, 181 transitions, 1815 flow [2024-06-14 12:11:09,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1488, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1815, PETRI_PLACES=137, PETRI_TRANSITIONS=181} [2024-06-14 12:11:09,289 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 94 predicate places. [2024-06-14 12:11:09,289 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 181 transitions, 1815 flow [2024-06-14 12:11:09,289 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 12:11:09,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:09,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:09,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 12:11:09,289 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:11:09,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:09,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1152004236, now seen corresponding path program 2 times [2024-06-14 12:11:09,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:09,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410910070] [2024-06-14 12:11:09,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:09,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:09,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:10,105 INFO 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 12:11:10,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:10,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410910070] [2024-06-14 12:11:10,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410910070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:10,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:10,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:11:10,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264467473] [2024-06-14 12:11:10,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:10,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:11:10,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:10,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:11:10,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:11:10,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:11:10,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 181 transitions, 1815 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 12:11:10,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:10,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:11:10,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:10,856 INFO L124 PetriNetUnfolderBase]: 2368/3547 cut-off events. [2024-06-14 12:11:10,857 INFO L125 PetriNetUnfolderBase]: For 143750/143782 co-relation queries the response was YES. [2024-06-14 12:11:10,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26049 conditions, 3547 events. 2368/3547 cut-off events. For 143750/143782 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 16980 event pairs, 595 based on Foata normal form. 8/3544 useless extension candidates. Maximal degree in co-relation 25986. Up to 3241 conditions per place. [2024-06-14 12:11:10,885 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 170 selfloop transitions, 25 changer transitions 0/225 dead transitions. [2024-06-14 12:11:10,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 225 transitions, 2372 flow [2024-06-14 12:11:10,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:11:10,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:11:10,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-14 12:11:10,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-14 12:11:10,887 INFO L175 Difference]: Start difference. First operand has 137 places, 181 transitions, 1815 flow. Second operand 10 states and 182 transitions. [2024-06-14 12:11:10,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 225 transitions, 2372 flow [2024-06-14 12:11:11,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 225 transitions, 2225 flow, removed 58 selfloop flow, removed 5 redundant places. [2024-06-14 12:11:11,006 INFO L231 Difference]: Finished difference. Result has 142 places, 184 transitions, 1792 flow [2024-06-14 12:11:11,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1668, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1792, PETRI_PLACES=142, PETRI_TRANSITIONS=184} [2024-06-14 12:11:11,008 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 99 predicate places. [2024-06-14 12:11:11,008 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 184 transitions, 1792 flow [2024-06-14 12:11:11,009 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 12:11:11,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:11,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:11,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 12:11:11,009 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 12:11:11,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:11,009 INFO L85 PathProgramCache]: Analyzing trace with hash 2101901248, now seen corresponding path program 3 times [2024-06-14 12:11:11,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:11,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274349094] [2024-06-14 12:11:11,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:11,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:11,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:11,906 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 12:11:11,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:11,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274349094] [2024-06-14 12:11:11,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274349094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:11,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:11,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:11:11,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575940733] [2024-06-14 12:11:11,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:11,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:11:11,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:11,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:11:11,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:11:12,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:11:12,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 184 transitions, 1792 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 12:11:12,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:12,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:11:12,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:12,706 INFO L124 PetriNetUnfolderBase]: 2360/3535 cut-off events. [2024-06-14 12:11:12,706 INFO L125 PetriNetUnfolderBase]: For 148459/148491 co-relation queries the response was YES. [2024-06-14 12:11:12,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25887 conditions, 3535 events. 2360/3535 cut-off events. For 148459/148491 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 16945 event pairs, 598 based on Foata normal form. 8/3532 useless extension candidates. Maximal degree in co-relation 25822. Up to 3253 conditions per place. [2024-06-14 12:11:12,786 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 169 selfloop transitions, 19 changer transitions 0/218 dead transitions. [2024-06-14 12:11:12,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 218 transitions, 2254 flow [2024-06-14 12:11:12,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:11:12,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:11:12,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 12:11:12,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 12:11:12,788 INFO L175 Difference]: Start difference. First operand has 142 places, 184 transitions, 1792 flow. Second operand 9 states and 162 transitions. [2024-06-14 12:11:12,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 218 transitions, 2254 flow [2024-06-14 12:11:12,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 218 transitions, 2119 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-14 12:11:12,887 INFO L231 Difference]: Finished difference. Result has 145 places, 184 transitions, 1702 flow [2024-06-14 12:11:12,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1657, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1702, PETRI_PLACES=145, PETRI_TRANSITIONS=184} [2024-06-14 12:11:12,888 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-14 12:11:12,888 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 184 transitions, 1702 flow [2024-06-14 12:11:12,888 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 12:11:12,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:12,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:12,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 12:11:12,889 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 12:11:12,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:12,889 INFO L85 PathProgramCache]: Analyzing trace with hash 821116942, now seen corresponding path program 2 times [2024-06-14 12:11:12,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:12,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465206718] [2024-06-14 12:11:12,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:12,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:12,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:13,754 INFO 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 12:11:13,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:13,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465206718] [2024-06-14 12:11:13,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465206718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:13,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:13,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:11:13,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746687230] [2024-06-14 12:11:13,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:13,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:11:13,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:13,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:11:13,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:11:13,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:11:13,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 184 transitions, 1702 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 12:11:13,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:13,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:11:13,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:14,589 INFO L124 PetriNetUnfolderBase]: 2510/3702 cut-off events. [2024-06-14 12:11:14,590 INFO L125 PetriNetUnfolderBase]: For 158970/158970 co-relation queries the response was YES. [2024-06-14 12:11:14,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27084 conditions, 3702 events. 2510/3702 cut-off events. For 158970/158970 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 17343 event pairs, 643 based on Foata normal form. 6/3708 useless extension candidates. Maximal degree in co-relation 27018. Up to 3556 conditions per place. [2024-06-14 12:11:14,618 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 193 selfloop transitions, 31 changer transitions 0/227 dead transitions. [2024-06-14 12:11:14,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 227 transitions, 2519 flow [2024-06-14 12:11:14,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:11:14,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:11:14,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 12:11:14,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-14 12:11:14,620 INFO L175 Difference]: Start difference. First operand has 145 places, 184 transitions, 1702 flow. Second operand 9 states and 167 transitions. [2024-06-14 12:11:14,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 227 transitions, 2519 flow [2024-06-14 12:11:14,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 227 transitions, 2457 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-14 12:11:14,710 INFO L231 Difference]: Finished difference. Result has 145 places, 188 transitions, 1800 flow [2024-06-14 12:11:14,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1640, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1800, PETRI_PLACES=145, PETRI_TRANSITIONS=188} [2024-06-14 12:11:14,711 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-14 12:11:14,711 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 188 transitions, 1800 flow [2024-06-14 12:11:14,711 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 12:11:14,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:14,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:14,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 12:11:14,712 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 12:11:14,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:14,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1154800870, now seen corresponding path program 3 times [2024-06-14 12:11:14,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:14,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888321423] [2024-06-14 12:11:14,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:14,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:14,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:15,600 INFO 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 12:11:15,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:15,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888321423] [2024-06-14 12:11:15,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888321423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:15,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:15,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:11:15,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805684232] [2024-06-14 12:11:15,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:15,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:11:15,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:15,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:11:15,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:11:15,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:11:15,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 188 transitions, 1800 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 12:11:15,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:15,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:11:15,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:16,428 INFO L124 PetriNetUnfolderBase]: 2514/3708 cut-off events. [2024-06-14 12:11:16,428 INFO L125 PetriNetUnfolderBase]: For 166476/166476 co-relation queries the response was YES. [2024-06-14 12:11:16,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27419 conditions, 3708 events. 2514/3708 cut-off events. For 166476/166476 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 17379 event pairs, 639 based on Foata normal form. 6/3714 useless extension candidates. Maximal degree in co-relation 27352. Up to 3499 conditions per place. [2024-06-14 12:11:16,460 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 195 selfloop transitions, 37 changer transitions 0/235 dead transitions. [2024-06-14 12:11:16,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 235 transitions, 2767 flow [2024-06-14 12:11:16,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:11:16,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:11:16,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-14 12:11:16,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-14 12:11:16,462 INFO L175 Difference]: Start difference. First operand has 145 places, 188 transitions, 1800 flow. Second operand 9 states and 169 transitions. [2024-06-14 12:11:16,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 235 transitions, 2767 flow [2024-06-14 12:11:16,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 235 transitions, 2646 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-14 12:11:16,573 INFO L231 Difference]: Finished difference. Result has 148 places, 195 transitions, 1927 flow [2024-06-14 12:11:16,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1679, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1927, PETRI_PLACES=148, PETRI_TRANSITIONS=195} [2024-06-14 12:11:16,573 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 105 predicate places. [2024-06-14 12:11:16,574 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 195 transitions, 1927 flow [2024-06-14 12:11:16,574 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 12:11:16,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:16,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:16,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 12:11:16,574 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 12:11:16,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:16,575 INFO L85 PathProgramCache]: Analyzing trace with hash 2106554596, now seen corresponding path program 1 times [2024-06-14 12:11:16,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:16,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200199829] [2024-06-14 12:11:16,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:16,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:16,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:17,472 INFO 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 12:11:17,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:17,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200199829] [2024-06-14 12:11:17,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200199829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:17,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:17,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:11:17,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824220531] [2024-06-14 12:11:17,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:17,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:11:17,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:17,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:11:17,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:11:17,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:11:17,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 195 transitions, 1927 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 12:11:17,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:17,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:11:17,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:18,305 INFO L124 PetriNetUnfolderBase]: 2542/3754 cut-off events. [2024-06-14 12:11:18,305 INFO L125 PetriNetUnfolderBase]: For 180033/180035 co-relation queries the response was YES. [2024-06-14 12:11:18,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28132 conditions, 3754 events. 2542/3754 cut-off events. For 180033/180035 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 17659 event pairs, 583 based on Foata normal form. 8/3762 useless extension candidates. Maximal degree in co-relation 28063. Up to 3518 conditions per place. [2024-06-14 12:11:18,330 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 188 selfloop transitions, 40 changer transitions 0/231 dead transitions. [2024-06-14 12:11:18,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 231 transitions, 2745 flow [2024-06-14 12:11:18,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:11:18,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:11:18,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 12:11:18,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-14 12:11:18,331 INFO L175 Difference]: Start difference. First operand has 148 places, 195 transitions, 1927 flow. Second operand 8 states and 152 transitions. [2024-06-14 12:11:18,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 231 transitions, 2745 flow [2024-06-14 12:11:18,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 231 transitions, 2628 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-14 12:11:18,443 INFO L231 Difference]: Finished difference. Result has 151 places, 198 transitions, 1982 flow [2024-06-14 12:11:18,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1810, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1982, PETRI_PLACES=151, PETRI_TRANSITIONS=198} [2024-06-14 12:11:18,443 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 108 predicate places. [2024-06-14 12:11:18,443 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 198 transitions, 1982 flow [2024-06-14 12:11:18,444 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 12:11:18,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:18,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:18,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 12:11:18,444 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 12:11:18,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:18,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1270269670, now seen corresponding path program 4 times [2024-06-14 12:11:18,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:18,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617374481] [2024-06-14 12:11:18,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:18,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:18,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:19,259 INFO 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 12:11:19,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:19,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617374481] [2024-06-14 12:11:19,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617374481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:19,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:19,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:11:19,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515845273] [2024-06-14 12:11:19,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:19,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:11:19,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:19,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:11:19,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:11:19,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:11:19,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 198 transitions, 1982 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 12:11:19,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:19,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:11:19,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:20,147 INFO L124 PetriNetUnfolderBase]: 2578/3806 cut-off events. [2024-06-14 12:11:20,147 INFO L125 PetriNetUnfolderBase]: For 188977/188979 co-relation queries the response was YES. [2024-06-14 12:11:20,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29047 conditions, 3806 events. 2578/3806 cut-off events. For 188977/188979 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 17970 event pairs, 564 based on Foata normal form. 6/3812 useless extension candidates. Maximal degree in co-relation 28976. Up to 3193 conditions per place. [2024-06-14 12:11:20,180 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 159 selfloop transitions, 84 changer transitions 0/246 dead transitions. [2024-06-14 12:11:20,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 246 transitions, 3044 flow [2024-06-14 12:11:20,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:11:20,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:11:20,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-14 12:11:20,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-14 12:11:20,186 INFO L175 Difference]: Start difference. First operand has 151 places, 198 transitions, 1982 flow. Second operand 9 states and 175 transitions. [2024-06-14 12:11:20,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 246 transitions, 3044 flow [2024-06-14 12:11:20,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 246 transitions, 2896 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-14 12:11:20,313 INFO L231 Difference]: Finished difference. Result has 155 places, 205 transitions, 2196 flow [2024-06-14 12:11:20,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1834, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2196, PETRI_PLACES=155, PETRI_TRANSITIONS=205} [2024-06-14 12:11:20,313 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 112 predicate places. [2024-06-14 12:11:20,313 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 205 transitions, 2196 flow [2024-06-14 12:11:20,314 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 12:11:20,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:20,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:20,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 12:11:20,314 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 12:11:20,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:20,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1270091916, now seen corresponding path program 4 times [2024-06-14 12:11:20,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:20,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938255147] [2024-06-14 12:11:20,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:20,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:20,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:21,195 INFO 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 12:11:21,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:21,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938255147] [2024-06-14 12:11:21,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938255147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:21,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:21,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:11:21,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299477563] [2024-06-14 12:11:21,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:21,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:11:21,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:21,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:11:21,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:11:21,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:11:21,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 205 transitions, 2196 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 12:11:21,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:21,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:11:21,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:22,081 INFO L124 PetriNetUnfolderBase]: 2470/3706 cut-off events. [2024-06-14 12:11:22,081 INFO L125 PetriNetUnfolderBase]: For 199543/199587 co-relation queries the response was YES. [2024-06-14 12:11:22,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29562 conditions, 3706 events. 2470/3706 cut-off events. For 199543/199587 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 17980 event pairs, 588 based on Foata normal form. 14/3709 useless extension candidates. Maximal degree in co-relation 29489. Up to 3360 conditions per place. [2024-06-14 12:11:22,109 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 171 selfloop transitions, 31 changer transitions 0/238 dead transitions. [2024-06-14 12:11:22,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 238 transitions, 2768 flow [2024-06-14 12:11:22,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:11:22,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:11:22,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-14 12:11:22,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-14 12:11:22,111 INFO L175 Difference]: Start difference. First operand has 155 places, 205 transitions, 2196 flow. Second operand 9 states and 163 transitions. [2024-06-14 12:11:22,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 238 transitions, 2768 flow [2024-06-14 12:11:22,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 238 transitions, 2610 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-14 12:11:22,256 INFO L231 Difference]: Finished difference. Result has 159 places, 207 transitions, 2201 flow [2024-06-14 12:11:22,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2038, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2201, PETRI_PLACES=159, PETRI_TRANSITIONS=207} [2024-06-14 12:11:22,257 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 116 predicate places. [2024-06-14 12:11:22,257 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 207 transitions, 2201 flow [2024-06-14 12:11:22,257 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 12:11:22,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:22,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:22,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 12:11:22,258 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 12:11:22,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:22,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1270092040, now seen corresponding path program 5 times [2024-06-14 12:11:22,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:22,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704951861] [2024-06-14 12:11:22,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:22,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:22,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:23,162 INFO 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 12:11:23,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:23,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704951861] [2024-06-14 12:11:23,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704951861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:23,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:23,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:11:23,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963992877] [2024-06-14 12:11:23,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:23,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:11:23,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:23,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:11:23,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:11:23,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:11:23,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 207 transitions, 2201 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 12:11:23,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:23,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:11:23,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:24,012 INFO L124 PetriNetUnfolderBase]: 2655/3918 cut-off events. [2024-06-14 12:11:24,012 INFO L125 PetriNetUnfolderBase]: For 217800/217802 co-relation queries the response was YES. [2024-06-14 12:11:24,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31507 conditions, 3918 events. 2655/3918 cut-off events. For 217800/217802 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 18625 event pairs, 564 based on Foata normal form. 8/3926 useless extension candidates. Maximal degree in co-relation 31432. Up to 3288 conditions per place. [2024-06-14 12:11:24,043 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 178 selfloop transitions, 79 changer transitions 0/260 dead transitions. [2024-06-14 12:11:24,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 260 transitions, 3381 flow [2024-06-14 12:11:24,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:11:24,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:11:24,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-14 12:11:24,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595238095238095 [2024-06-14 12:11:24,045 INFO L175 Difference]: Start difference. First operand has 159 places, 207 transitions, 2201 flow. Second operand 10 states and 193 transitions. [2024-06-14 12:11:24,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 260 transitions, 3381 flow [2024-06-14 12:11:24,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 260 transitions, 3236 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-14 12:11:24,166 INFO L231 Difference]: Finished difference. Result has 163 places, 215 transitions, 2434 flow [2024-06-14 12:11:24,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2056, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2434, PETRI_PLACES=163, PETRI_TRANSITIONS=215} [2024-06-14 12:11:24,166 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 120 predicate places. [2024-06-14 12:11:24,166 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 215 transitions, 2434 flow [2024-06-14 12:11:24,167 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 12:11:24,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:24,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:24,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 12:11:24,167 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:11:24,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:24,167 INFO L85 PathProgramCache]: Analyzing trace with hash -2037501715, now seen corresponding path program 1 times [2024-06-14 12:11:24,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:24,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115228771] [2024-06-14 12:11:24,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:24,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:24,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:24,681 INFO 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 12:11:24,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:24,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115228771] [2024-06-14 12:11:24,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115228771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:24,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:24,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:11:24,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261061648] [2024-06-14 12:11:24,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:24,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:11:24,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:24,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:11:24,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:11:24,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:11:24,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 215 transitions, 2434 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 12:11:24,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:24,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:11:24,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:25,347 INFO L124 PetriNetUnfolderBase]: 2505/3746 cut-off events. [2024-06-14 12:11:25,347 INFO L125 PetriNetUnfolderBase]: For 226799/226823 co-relation queries the response was YES. [2024-06-14 12:11:25,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31677 conditions, 3746 events. 2505/3746 cut-off events. For 226799/226823 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 18231 event pairs, 627 based on Foata normal form. 2/3709 useless extension candidates. Maximal degree in co-relation 31600. Up to 3588 conditions per place. [2024-06-14 12:11:25,376 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 199 selfloop transitions, 22 changer transitions 0/236 dead transitions. [2024-06-14 12:11:25,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 236 transitions, 3078 flow [2024-06-14 12:11:25,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:11:25,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:11:25,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-14 12:11:25,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-14 12:11:25,377 INFO L175 Difference]: Start difference. First operand has 163 places, 215 transitions, 2434 flow. Second operand 6 states and 110 transitions. [2024-06-14 12:11:25,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 236 transitions, 3078 flow [2024-06-14 12:11:25,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 236 transitions, 2853 flow, removed 68 selfloop flow, removed 6 redundant places. [2024-06-14 12:11:25,514 INFO L231 Difference]: Finished difference. Result has 163 places, 220 transitions, 2350 flow [2024-06-14 12:11:25,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2216, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2350, PETRI_PLACES=163, PETRI_TRANSITIONS=220} [2024-06-14 12:11:25,515 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 120 predicate places. [2024-06-14 12:11:25,515 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 220 transitions, 2350 flow [2024-06-14 12:11:25,516 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 12:11:25,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:25,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:25,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 12:11:25,516 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 12:11:25,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:25,516 INFO L85 PathProgramCache]: Analyzing trace with hash 163006840, now seen corresponding path program 2 times [2024-06-14 12:11:25,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:25,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566140776] [2024-06-14 12:11:25,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:25,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:25,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:26,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:26,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:26,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566140776] [2024-06-14 12:11:26,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566140776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:26,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:26,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:11:26,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637616119] [2024-06-14 12:11:26,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:26,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:11:26,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:26,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:11:26,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:11:26,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:11:26,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 220 transitions, 2350 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 12:11:26,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:26,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:11:26,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:27,479 INFO L124 PetriNetUnfolderBase]: 2693/3987 cut-off events. [2024-06-14 12:11:27,479 INFO L125 PetriNetUnfolderBase]: For 239113/239113 co-relation queries the response was YES. [2024-06-14 12:11:27,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32860 conditions, 3987 events. 2693/3987 cut-off events. For 239113/239113 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 19225 event pairs, 1047 based on Foata normal form. 6/3993 useless extension candidates. Maximal degree in co-relation 32781. Up to 3814 conditions per place. [2024-06-14 12:11:27,515 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 217 selfloop transitions, 32 changer transitions 0/252 dead transitions. [2024-06-14 12:11:27,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 252 transitions, 3181 flow [2024-06-14 12:11:27,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:11:27,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:11:27,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-14 12:11:27,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-14 12:11:27,517 INFO L175 Difference]: Start difference. First operand has 163 places, 220 transitions, 2350 flow. Second operand 9 states and 153 transitions. [2024-06-14 12:11:27,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 252 transitions, 3181 flow [2024-06-14 12:11:27,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 252 transitions, 3131 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-14 12:11:27,714 INFO L231 Difference]: Finished difference. Result has 170 places, 225 transitions, 2494 flow [2024-06-14 12:11:27,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2301, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2494, PETRI_PLACES=170, PETRI_TRANSITIONS=225} [2024-06-14 12:11:27,716 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 127 predicate places. [2024-06-14 12:11:27,716 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 225 transitions, 2494 flow [2024-06-14 12:11:27,716 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 12:11:27,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:27,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:27,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 12:11:27,717 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 12:11:27,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:27,717 INFO L85 PathProgramCache]: Analyzing trace with hash 162999896, now seen corresponding path program 6 times [2024-06-14 12:11:27,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:27,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680966516] [2024-06-14 12:11:27,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:27,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:27,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:28,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:28,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:28,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680966516] [2024-06-14 12:11:28,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680966516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:28,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:28,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:11:28,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335704092] [2024-06-14 12:11:28,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:28,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:11:28,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:28,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:11:28,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:11:28,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:11:28,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 225 transitions, 2494 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 12:11:28,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:28,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:11:28,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:29,319 INFO L124 PetriNetUnfolderBase]: 2729/4039 cut-off events. [2024-06-14 12:11:29,320 INFO L125 PetriNetUnfolderBase]: For 252783/252783 co-relation queries the response was YES. [2024-06-14 12:11:29,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33984 conditions, 4039 events. 2729/4039 cut-off events. For 252783/252783 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 19428 event pairs, 1052 based on Foata normal form. 6/4045 useless extension candidates. Maximal degree in co-relation 33903. Up to 3661 conditions per place. [2024-06-14 12:11:29,355 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 206 selfloop transitions, 55 changer transitions 0/264 dead transitions. [2024-06-14 12:11:29,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 264 transitions, 3530 flow [2024-06-14 12:11:29,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:11:29,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:11:29,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-14 12:11:29,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-14 12:11:29,357 INFO L175 Difference]: Start difference. First operand has 170 places, 225 transitions, 2494 flow. Second operand 9 states and 166 transitions. [2024-06-14 12:11:29,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 264 transitions, 3530 flow [2024-06-14 12:11:29,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 264 transitions, 3391 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-14 12:11:29,591 INFO L231 Difference]: Finished difference. Result has 174 places, 229 transitions, 2602 flow [2024-06-14 12:11:29,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2355, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2602, PETRI_PLACES=174, PETRI_TRANSITIONS=229} [2024-06-14 12:11:29,592 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 131 predicate places. [2024-06-14 12:11:29,592 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 229 transitions, 2602 flow [2024-06-14 12:11:29,592 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 12:11:29,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:29,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:29,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 12:11:29,593 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 12:11:29,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:29,593 INFO L85 PathProgramCache]: Analyzing trace with hash 390907990, now seen corresponding path program 3 times [2024-06-14 12:11:29,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:29,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497948409] [2024-06-14 12:11:29,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:29,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:29,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:30,574 INFO 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 12:11:30,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:30,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497948409] [2024-06-14 12:11:30,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497948409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:30,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:30,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:11:30,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851900933] [2024-06-14 12:11:30,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:30,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:11:30,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:30,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:11:30,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:11:30,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:11:30,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 229 transitions, 2602 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 12:11:30,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:30,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:11:30,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:31,457 INFO L124 PetriNetUnfolderBase]: 2757/4083 cut-off events. [2024-06-14 12:11:31,458 INFO L125 PetriNetUnfolderBase]: For 265509/265509 co-relation queries the response was YES. [2024-06-14 12:11:31,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34972 conditions, 4083 events. 2757/4083 cut-off events. For 265509/265509 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 19678 event pairs, 1064 based on Foata normal form. 6/4089 useless extension candidates. Maximal degree in co-relation 34889. Up to 3970 conditions per place. [2024-06-14 12:11:31,494 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 228 selfloop transitions, 26 changer transitions 0/257 dead transitions. [2024-06-14 12:11:31,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 257 transitions, 3358 flow [2024-06-14 12:11:31,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:11:31,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:11:31,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-14 12:11:31,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-14 12:11:31,496 INFO L175 Difference]: Start difference. First operand has 174 places, 229 transitions, 2602 flow. Second operand 9 states and 150 transitions. [2024-06-14 12:11:31,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 257 transitions, 3358 flow [2024-06-14 12:11:31,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 257 transitions, 3120 flow, removed 58 selfloop flow, removed 7 redundant places. [2024-06-14 12:11:31,707 INFO L231 Difference]: Finished difference. Result has 176 places, 232 transitions, 2534 flow [2024-06-14 12:11:31,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2364, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2534, PETRI_PLACES=176, PETRI_TRANSITIONS=232} [2024-06-14 12:11:31,708 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 133 predicate places. [2024-06-14 12:11:31,708 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 232 transitions, 2534 flow [2024-06-14 12:11:31,708 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 12:11:31,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:31,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:31,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 12:11:31,709 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:11:31,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:31,709 INFO L85 PathProgramCache]: Analyzing trace with hash 399478870, now seen corresponding path program 4 times [2024-06-14 12:11:31,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:31,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300252332] [2024-06-14 12:11:31,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:31,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:31,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:32,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:32,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:32,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300252332] [2024-06-14 12:11:32,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300252332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:32,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:32,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:11:32,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281660542] [2024-06-14 12:11:32,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:32,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:11:32,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:32,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:11:32,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:11:32,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:11:32,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 232 transitions, 2534 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 12:11:32,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:32,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:11:32,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:33,480 INFO L124 PetriNetUnfolderBase]: 2785/4127 cut-off events. [2024-06-14 12:11:33,480 INFO L125 PetriNetUnfolderBase]: For 276853/276853 co-relation queries the response was YES. [2024-06-14 12:11:33,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35327 conditions, 4127 events. 2785/4127 cut-off events. For 276853/276853 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 19971 event pairs, 1055 based on Foata normal form. 6/4133 useless extension candidates. Maximal degree in co-relation 35243. Up to 3986 conditions per place. [2024-06-14 12:11:33,518 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 228 selfloop transitions, 29 changer transitions 0/260 dead transitions. [2024-06-14 12:11:33,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 260 transitions, 3302 flow [2024-06-14 12:11:33,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:11:33,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:11:33,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 12:11:33,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-14 12:11:33,519 INFO L175 Difference]: Start difference. First operand has 176 places, 232 transitions, 2534 flow. Second operand 8 states and 142 transitions. [2024-06-14 12:11:33,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 260 transitions, 3302 flow [2024-06-14 12:11:33,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 260 transitions, 3156 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-14 12:11:33,758 INFO L231 Difference]: Finished difference. Result has 177 places, 235 transitions, 2570 flow [2024-06-14 12:11:33,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2388, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2570, PETRI_PLACES=177, PETRI_TRANSITIONS=235} [2024-06-14 12:11:33,758 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 134 predicate places. [2024-06-14 12:11:33,758 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 235 transitions, 2570 flow [2024-06-14 12:11:33,759 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 12:11:33,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:33,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:33,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 12:11:33,760 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 12:11:33,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:33,760 INFO L85 PathProgramCache]: Analyzing trace with hash 390901046, now seen corresponding path program 7 times [2024-06-14 12:11:33,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:33,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644811701] [2024-06-14 12:11:33,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:33,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:33,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:34,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:34,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:34,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644811701] [2024-06-14 12:11:34,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644811701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:34,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:34,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:11:34,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91000019] [2024-06-14 12:11:34,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:34,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:11:34,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:34,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:11:34,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:11:34,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:11:34,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 235 transitions, 2570 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 12:11:34,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:34,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:11:34,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:35,506 INFO L124 PetriNetUnfolderBase]: 2832/4195 cut-off events. [2024-06-14 12:11:35,506 INFO L125 PetriNetUnfolderBase]: For 292951/292951 co-relation queries the response was YES. [2024-06-14 12:11:35,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36324 conditions, 4195 events. 2832/4195 cut-off events. For 292951/292951 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 20359 event pairs, 1070 based on Foata normal form. 6/4201 useless extension candidates. Maximal degree in co-relation 36239. Up to 3981 conditions per place. [2024-06-14 12:11:35,544 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 229 selfloop transitions, 43 changer transitions 0/275 dead transitions. [2024-06-14 12:11:35,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 275 transitions, 3691 flow [2024-06-14 12:11:35,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:11:35,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:11:35,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-14 12:11:35,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-14 12:11:35,545 INFO L175 Difference]: Start difference. First operand has 177 places, 235 transitions, 2570 flow. Second operand 9 states and 163 transitions. [2024-06-14 12:11:35,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 275 transitions, 3691 flow [2024-06-14 12:11:35,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 275 transitions, 3533 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-14 12:11:35,827 INFO L231 Difference]: Finished difference. Result has 181 places, 243 transitions, 2779 flow [2024-06-14 12:11:35,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2412, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2779, PETRI_PLACES=181, PETRI_TRANSITIONS=243} [2024-06-14 12:11:35,828 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 138 predicate places. [2024-06-14 12:11:35,828 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 243 transitions, 2779 flow [2024-06-14 12:11:35,828 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 12:11:35,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:35,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:35,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 12:11:35,828 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 12:11:35,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:35,829 INFO L85 PathProgramCache]: Analyzing trace with hash 162826916, now seen corresponding path program 8 times [2024-06-14 12:11:35,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:35,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800720386] [2024-06-14 12:11:35,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:35,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:35,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:36,825 INFO 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 12:11:36,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:36,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800720386] [2024-06-14 12:11:36,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800720386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:36,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:36,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:11:36,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794690013] [2024-06-14 12:11:36,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:36,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:11:36,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:36,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:11:36,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:11:36,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:11:36,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 243 transitions, 2779 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 12:11:36,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:36,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:11:36,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:37,767 INFO L124 PetriNetUnfolderBase]: 2868/4247 cut-off events. [2024-06-14 12:11:37,767 INFO L125 PetriNetUnfolderBase]: For 306076/306076 co-relation queries the response was YES. [2024-06-14 12:11:37,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37461 conditions, 4247 events. 2868/4247 cut-off events. For 306076/306076 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 20666 event pairs, 1044 based on Foata normal form. 6/4253 useless extension candidates. Maximal degree in co-relation 37374. Up to 3867 conditions per place. [2024-06-14 12:11:37,808 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 220 selfloop transitions, 61 changer transitions 0/284 dead transitions. [2024-06-14 12:11:37,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 284 transitions, 3959 flow [2024-06-14 12:11:37,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:11:37,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:11:37,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-14 12:11:37,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-14 12:11:37,809 INFO L175 Difference]: Start difference. First operand has 181 places, 243 transitions, 2779 flow. Second operand 9 states and 166 transitions. [2024-06-14 12:11:37,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 284 transitions, 3959 flow [2024-06-14 12:11:38,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 284 transitions, 3777 flow, removed 71 selfloop flow, removed 5 redundant places. [2024-06-14 12:11:38,064 INFO L231 Difference]: Finished difference. Result has 186 places, 250 transitions, 2949 flow [2024-06-14 12:11:38,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2597, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2949, PETRI_PLACES=186, PETRI_TRANSITIONS=250} [2024-06-14 12:11:38,064 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 143 predicate places. [2024-06-14 12:11:38,065 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 250 transitions, 2949 flow [2024-06-14 12:11:38,065 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 12:11:38,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:38,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:38,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 12:11:38,065 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 12:11:38,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:38,066 INFO L85 PathProgramCache]: Analyzing trace with hash 399182200, now seen corresponding path program 5 times [2024-06-14 12:11:38,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:38,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087763661] [2024-06-14 12:11:38,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:38,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:38,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:38,954 INFO 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 12:11:38,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:38,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087763661] [2024-06-14 12:11:38,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087763661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:38,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:38,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:11:38,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189032183] [2024-06-14 12:11:38,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:38,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:11:38,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:38,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:11:38,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:11:39,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:11:39,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 250 transitions, 2949 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 12:11:39,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:39,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:11:39,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:39,845 INFO L124 PetriNetUnfolderBase]: 2871/4252 cut-off events. [2024-06-14 12:11:39,845 INFO L125 PetriNetUnfolderBase]: For 316962/316962 co-relation queries the response was YES. [2024-06-14 12:11:39,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38077 conditions, 4252 events. 2871/4252 cut-off events. For 316962/316962 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 20693 event pairs, 1068 based on Foata normal form. 6/4258 useless extension candidates. Maximal degree in co-relation 37987. Up to 4080 conditions per place. [2024-06-14 12:11:39,884 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 238 selfloop transitions, 37 changer transitions 0/278 dead transitions. [2024-06-14 12:11:39,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 278 transitions, 3777 flow [2024-06-14 12:11:39,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:11:39,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:11:39,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 12:11:39,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-14 12:11:39,886 INFO L175 Difference]: Start difference. First operand has 186 places, 250 transitions, 2949 flow. Second operand 8 states and 143 transitions. [2024-06-14 12:11:39,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 278 transitions, 3777 flow [2024-06-14 12:11:40,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 278 transitions, 3562 flow, removed 72 selfloop flow, removed 5 redundant places. [2024-06-14 12:11:40,161 INFO L231 Difference]: Finished difference. Result has 189 places, 253 transitions, 2952 flow [2024-06-14 12:11:40,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2734, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2952, PETRI_PLACES=189, PETRI_TRANSITIONS=253} [2024-06-14 12:11:40,162 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 146 predicate places. [2024-06-14 12:11:40,162 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 253 transitions, 2952 flow [2024-06-14 12:11:40,162 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 12:11:40,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:40,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:40,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 12:11:40,163 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 12:11:40,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:40,163 INFO L85 PathProgramCache]: Analyzing trace with hash 399181952, now seen corresponding path program 1 times [2024-06-14 12:11:40,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:40,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270954389] [2024-06-14 12:11:40,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:40,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:40,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:41,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:41,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:41,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270954389] [2024-06-14 12:11:41,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270954389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:41,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:41,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:11:41,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446866489] [2024-06-14 12:11:41,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:41,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:11:41,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:41,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:11:41,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:11:41,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:11:41,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 253 transitions, 2952 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 12:11:41,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:41,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:11:41,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:41,911 INFO L124 PetriNetUnfolderBase]: 2862/4239 cut-off events. [2024-06-14 12:11:41,911 INFO L125 PetriNetUnfolderBase]: For 320504/320504 co-relation queries the response was YES. [2024-06-14 12:11:41,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37845 conditions, 4239 events. 2862/4239 cut-off events. For 320504/320504 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 20635 event pairs, 1067 based on Foata normal form. 3/4242 useless extension candidates. Maximal degree in co-relation 37754. Up to 4072 conditions per place. [2024-06-14 12:11:41,948 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 236 selfloop transitions, 39 changer transitions 0/278 dead transitions. [2024-06-14 12:11:41,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 278 transitions, 3658 flow [2024-06-14 12:11:41,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:11:41,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:11:41,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 12:11:41,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 12:11:41,949 INFO L175 Difference]: Start difference. First operand has 189 places, 253 transitions, 2952 flow. Second operand 8 states and 144 transitions. [2024-06-14 12:11:41,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 278 transitions, 3658 flow [2024-06-14 12:11:42,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 278 transitions, 3406 flow, removed 93 selfloop flow, removed 6 redundant places. [2024-06-14 12:11:42,243 INFO L231 Difference]: Finished difference. Result has 191 places, 253 transitions, 2792 flow [2024-06-14 12:11:42,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2700, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2792, PETRI_PLACES=191, PETRI_TRANSITIONS=253} [2024-06-14 12:11:42,243 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-14 12:11:42,243 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 253 transitions, 2792 flow [2024-06-14 12:11:42,244 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 12:11:42,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:42,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:42,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 12:11:42,244 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 12:11:42,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:42,244 INFO L85 PathProgramCache]: Analyzing trace with hash 162822266, now seen corresponding path program 9 times [2024-06-14 12:11:42,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:42,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447153952] [2024-06-14 12:11:42,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:42,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:42,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:43,016 INFO 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 12:11:43,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:43,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447153952] [2024-06-14 12:11:43,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447153952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:43,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:43,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:11:43,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665202842] [2024-06-14 12:11:43,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:43,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:11:43,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:43,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:11:43,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:11:43,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:11:43,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 253 transitions, 2792 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 12:11:43,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:43,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:11:43,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:43,979 INFO L124 PetriNetUnfolderBase]: 2866/4245 cut-off events. [2024-06-14 12:11:43,979 INFO L125 PetriNetUnfolderBase]: For 330657/330657 co-relation queries the response was YES. [2024-06-14 12:11:43,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37636 conditions, 4245 events. 2866/4245 cut-off events. For 330657/330657 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 20626 event pairs, 1039 based on Foata normal form. 6/4251 useless extension candidates. Maximal degree in co-relation 37544. Up to 3719 conditions per place. [2024-06-14 12:11:44,012 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 219 selfloop transitions, 73 changer transitions 0/295 dead transitions. [2024-06-14 12:11:44,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 295 transitions, 4102 flow [2024-06-14 12:11:44,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:11:44,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:11:44,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 12:11:44,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-14 12:11:44,013 INFO L175 Difference]: Start difference. First operand has 191 places, 253 transitions, 2792 flow. Second operand 9 states and 167 transitions. [2024-06-14 12:11:44,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 295 transitions, 4102 flow [2024-06-14 12:11:44,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 295 transitions, 4024 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 12:11:44,268 INFO L231 Difference]: Finished difference. Result has 194 places, 261 transitions, 3171 flow [2024-06-14 12:11:44,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2714, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3171, PETRI_PLACES=194, PETRI_TRANSITIONS=261} [2024-06-14 12:11:44,269 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2024-06-14 12:11:44,269 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 261 transitions, 3171 flow [2024-06-14 12:11:44,269 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 12:11:44,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:44,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:44,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 12:11:44,270 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 12:11:44,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:44,270 INFO L85 PathProgramCache]: Analyzing trace with hash 162822142, now seen corresponding path program 5 times [2024-06-14 12:11:44,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:44,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639876437] [2024-06-14 12:11:44,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:44,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:44,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:45,039 INFO 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 12:11:45,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:45,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639876437] [2024-06-14 12:11:45,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639876437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:45,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:45,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:11:45,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509802743] [2024-06-14 12:11:45,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:45,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:11:45,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:45,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:11:45,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:11:45,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:11:45,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 261 transitions, 3171 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 12:11:45,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:45,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:11:45,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:45,969 INFO L124 PetriNetUnfolderBase]: 2748/4122 cut-off events. [2024-06-14 12:11:45,969 INFO L125 PetriNetUnfolderBase]: For 347427/347459 co-relation queries the response was YES. [2024-06-14 12:11:45,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37868 conditions, 4122 events. 2748/4122 cut-off events. For 347427/347459 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 20499 event pairs, 990 based on Foata normal form. 11/4106 useless extension candidates. Maximal degree in co-relation 37774. Up to 3778 conditions per place. [2024-06-14 12:11:46,011 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 219 selfloop transitions, 20 changer transitions 0/290 dead transitions. [2024-06-14 12:11:46,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 290 transitions, 3833 flow [2024-06-14 12:11:46,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:11:46,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:11:46,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-14 12:11:46,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-14 12:11:46,012 INFO L175 Difference]: Start difference. First operand has 194 places, 261 transitions, 3171 flow. Second operand 9 states and 156 transitions. [2024-06-14 12:11:46,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 290 transitions, 3833 flow [2024-06-14 12:11:46,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 290 transitions, 3569 flow, removed 98 selfloop flow, removed 5 redundant places. [2024-06-14 12:11:46,349 INFO L231 Difference]: Finished difference. Result has 198 places, 263 transitions, 3074 flow [2024-06-14 12:11:46,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2907, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3074, PETRI_PLACES=198, PETRI_TRANSITIONS=263} [2024-06-14 12:11:46,349 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 155 predicate places. [2024-06-14 12:11:46,349 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 263 transitions, 3074 flow [2024-06-14 12:11:46,349 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 12:11:46,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:46,350 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 12:11:46,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 12:11:46,350 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:11:46,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:46,350 INFO L85 PathProgramCache]: Analyzing trace with hash 754968021, now seen corresponding path program 1 times [2024-06-14 12:11:46,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:46,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194136884] [2024-06-14 12:11:46,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:46,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:46,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:47,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:47,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:47,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194136884] [2024-06-14 12:11:47,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194136884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:47,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:47,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:11:47,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519857185] [2024-06-14 12:11:47,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:47,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:11:47,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:47,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:11:47,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:11:47,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:11:47,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 263 transitions, 3074 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 12:11:47,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:47,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:11:47,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:47,836 INFO L124 PetriNetUnfolderBase]: 2740/4111 cut-off events. [2024-06-14 12:11:47,836 INFO L125 PetriNetUnfolderBase]: For 361943/361996 co-relation queries the response was YES. [2024-06-14 12:11:47,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37554 conditions, 4111 events. 2740/4111 cut-off events. For 361943/361996 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 20716 event pairs, 1046 based on Foata normal form. 16/4087 useless extension candidates. Maximal degree in co-relation 37458. Up to 3895 conditions per place. [2024-06-14 12:11:47,879 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 244 selfloop transitions, 22 changer transitions 0/286 dead transitions. [2024-06-14 12:11:47,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 286 transitions, 3816 flow [2024-06-14 12:11:47,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:11:47,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:11:47,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-14 12:11:47,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-14 12:11:47,880 INFO L175 Difference]: Start difference. First operand has 198 places, 263 transitions, 3074 flow. Second operand 7 states and 121 transitions. [2024-06-14 12:11:47,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 286 transitions, 3816 flow [2024-06-14 12:11:48,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 286 transitions, 3667 flow, removed 56 selfloop flow, removed 7 redundant places. [2024-06-14 12:11:48,223 INFO L231 Difference]: Finished difference. Result has 199 places, 272 transitions, 3076 flow [2024-06-14 12:11:48,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2925, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3076, PETRI_PLACES=199, PETRI_TRANSITIONS=272} [2024-06-14 12:11:48,224 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 156 predicate places. [2024-06-14 12:11:48,224 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 272 transitions, 3076 flow [2024-06-14 12:11:48,224 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 12:11:48,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:48,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:48,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 12:11:48,225 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:11:48,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:48,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1499666905, now seen corresponding path program 2 times [2024-06-14 12:11:48,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:48,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574950078] [2024-06-14 12:11:48,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:48,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:48,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:48,804 INFO 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 12:11:48,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:48,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574950078] [2024-06-14 12:11:48,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574950078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:48,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:48,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:11:48,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389261565] [2024-06-14 12:11:48,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:48,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:11:48,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:48,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:11:48,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:11:48,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:11:48,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 272 transitions, 3076 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 12:11:48,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:48,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:11:48,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:49,548 INFO L124 PetriNetUnfolderBase]: 2722/4085 cut-off events. [2024-06-14 12:11:49,548 INFO L125 PetriNetUnfolderBase]: For 362841/362884 co-relation queries the response was YES. [2024-06-14 12:11:49,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37661 conditions, 4085 events. 2722/4085 cut-off events. For 362841/362884 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 20596 event pairs, 1046 based on Foata normal form. 12/4055 useless extension candidates. Maximal degree in co-relation 37563. Up to 3917 conditions per place. [2024-06-14 12:11:49,590 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 246 selfloop transitions, 14 changer transitions 0/280 dead transitions. [2024-06-14 12:11:49,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 280 transitions, 3616 flow [2024-06-14 12:11:49,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:11:49,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:11:49,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-14 12:11:49,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-14 12:11:49,592 INFO L175 Difference]: Start difference. First operand has 199 places, 272 transitions, 3076 flow. Second operand 6 states and 101 transitions. [2024-06-14 12:11:49,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 280 transitions, 3616 flow [2024-06-14 12:11:49,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 280 transitions, 3540 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-14 12:11:49,895 INFO L231 Difference]: Finished difference. Result has 202 places, 272 transitions, 3036 flow [2024-06-14 12:11:49,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3000, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3036, PETRI_PLACES=202, PETRI_TRANSITIONS=272} [2024-06-14 12:11:49,896 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 159 predicate places. [2024-06-14 12:11:49,896 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 272 transitions, 3036 flow [2024-06-14 12:11:49,896 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 12:11:49,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:49,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:49,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 12:11:49,897 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:11:49,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:49,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1220222261, now seen corresponding path program 1 times [2024-06-14 12:11:49,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:49,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627258779] [2024-06-14 12:11:49,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:49,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:49,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:50,396 INFO 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 12:11:50,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:50,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627258779] [2024-06-14 12:11:50,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627258779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:50,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:50,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:11:50,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593520470] [2024-06-14 12:11:50,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:50,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:11:50,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:50,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:11:50,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:11:50,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:11:50,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 272 transitions, 3036 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 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 12:11:50,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:50,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:11:50,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:51,235 INFO L124 PetriNetUnfolderBase]: 2929/4332 cut-off events. [2024-06-14 12:11:51,236 INFO L125 PetriNetUnfolderBase]: For 367055/367055 co-relation queries the response was YES. [2024-06-14 12:11:51,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39313 conditions, 4332 events. 2929/4332 cut-off events. For 367055/367055 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 20994 event pairs, 1093 based on Foata normal form. 3/4335 useless extension candidates. Maximal degree in co-relation 39214. Up to 4251 conditions per place. [2024-06-14 12:11:51,280 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 259 selfloop transitions, 25 changer transitions 0/287 dead transitions. [2024-06-14 12:11:51,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 287 transitions, 3778 flow [2024-06-14 12:11:51,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:11:51,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:11:51,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-14 12:11:51,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-14 12:11:51,281 INFO L175 Difference]: Start difference. First operand has 202 places, 272 transitions, 3036 flow. Second operand 6 states and 106 transitions. [2024-06-14 12:11:51,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 287 transitions, 3778 flow [2024-06-14 12:11:51,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 287 transitions, 3737 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 12:11:51,611 INFO L231 Difference]: Finished difference. Result has 203 places, 275 transitions, 3102 flow [2024-06-14 12:11:51,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2995, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3102, PETRI_PLACES=203, PETRI_TRANSITIONS=275} [2024-06-14 12:11:51,612 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-14 12:11:51,612 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 275 transitions, 3102 flow [2024-06-14 12:11:51,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 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 12:11:51,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:51,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:51,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 12:11:51,613 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:11:51,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:51,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1481411563, now seen corresponding path program 2 times [2024-06-14 12:11:51,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:51,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633007443] [2024-06-14 12:11:51,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:51,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:51,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:52,119 INFO 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 12:11:52,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:52,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633007443] [2024-06-14 12:11:52,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633007443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:52,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:52,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:11:52,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563641978] [2024-06-14 12:11:52,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:52,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:11:52,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:52,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:11:52,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:11:52,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:11:52,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 275 transitions, 3102 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 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 12:11:52,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:52,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:11:52,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:52,998 INFO L124 PetriNetUnfolderBase]: 2894/4280 cut-off events. [2024-06-14 12:11:52,998 INFO L125 PetriNetUnfolderBase]: For 375077/375079 co-relation queries the response was YES. [2024-06-14 12:11:53,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39185 conditions, 4280 events. 2894/4280 cut-off events. For 375077/375079 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 20722 event pairs, 1103 based on Foata normal form. 1/4281 useless extension candidates. Maximal degree in co-relation 39085. Up to 4200 conditions per place. [2024-06-14 12:11:53,044 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 254 selfloop transitions, 26 changer transitions 0/283 dead transitions. [2024-06-14 12:11:53,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 283 transitions, 3682 flow [2024-06-14 12:11:53,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:11:53,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:11:53,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-14 12:11:53,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4087301587301587 [2024-06-14 12:11:53,067 INFO L175 Difference]: Start difference. First operand has 203 places, 275 transitions, 3102 flow. Second operand 6 states and 103 transitions. [2024-06-14 12:11:53,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 283 transitions, 3682 flow [2024-06-14 12:11:53,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 283 transitions, 3628 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-14 12:11:53,464 INFO L231 Difference]: Finished difference. Result has 205 places, 275 transitions, 3106 flow [2024-06-14 12:11:53,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3048, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3106, PETRI_PLACES=205, PETRI_TRANSITIONS=275} [2024-06-14 12:11:53,464 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 162 predicate places. [2024-06-14 12:11:53,464 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 275 transitions, 3106 flow [2024-06-14 12:11:53,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 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 12:11:53,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:53,465 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 12:11:53,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 12:11:53,465 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:11:53,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:53,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1283331388, now seen corresponding path program 1 times [2024-06-14 12:11:53,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:53,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194167640] [2024-06-14 12:11:53,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:53,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:53,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:54,434 INFO 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 12:11:54,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:54,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194167640] [2024-06-14 12:11:54,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194167640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:54,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:54,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:11:54,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630871037] [2024-06-14 12:11:54,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:54,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:11:54,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:54,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:11:54,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:11:54,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:11:54,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 275 transitions, 3106 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 12:11:54,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:54,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:11:54,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:55,667 INFO L124 PetriNetUnfolderBase]: 3638/5410 cut-off events. [2024-06-14 12:11:55,668 INFO L125 PetriNetUnfolderBase]: For 509375/509381 co-relation queries the response was YES. [2024-06-14 12:11:55,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51402 conditions, 5410 events. 3638/5410 cut-off events. For 509375/509381 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 27903 event pairs, 768 based on Foata normal form. 30/5440 useless extension candidates. Maximal degree in co-relation 51301. Up to 4329 conditions per place. [2024-06-14 12:11:55,726 INFO L140 encePairwiseOnDemand]: 26/42 looper letters, 344 selfloop transitions, 72 changer transitions 0/419 dead transitions. [2024-06-14 12:11:55,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 419 transitions, 5832 flow [2024-06-14 12:11:55,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 12:11:55,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 12:11:55,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 250 transitions. [2024-06-14 12:11:55,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45787545787545786 [2024-06-14 12:11:55,728 INFO L175 Difference]: Start difference. First operand has 205 places, 275 transitions, 3106 flow. Second operand 13 states and 250 transitions. [2024-06-14 12:11:55,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 419 transitions, 5832 flow [2024-06-14 12:11:56,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 419 transitions, 5764 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 12:11:56,250 INFO L231 Difference]: Finished difference. Result has 219 places, 323 transitions, 4025 flow [2024-06-14 12:11:56,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3038, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4025, PETRI_PLACES=219, PETRI_TRANSITIONS=323} [2024-06-14 12:11:56,250 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-14 12:11:56,250 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 323 transitions, 4025 flow [2024-06-14 12:11:56,250 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 12:11:56,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:56,251 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 12:11:56,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 12:11:56,251 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:11:56,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:56,251 INFO L85 PathProgramCache]: Analyzing trace with hash 903424700, now seen corresponding path program 2 times [2024-06-14 12:11:56,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:56,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316864112] [2024-06-14 12:11:56,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:56,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:56,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:57,255 INFO 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 12:11:57,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:57,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316864112] [2024-06-14 12:11:57,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316864112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:57,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:57,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:11:57,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558178676] [2024-06-14 12:11:57,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:57,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:11:57,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:57,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:11:57,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:11:57,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:11:57,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 323 transitions, 4025 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 12:11:57,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:57,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:11:57,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:58,950 INFO L124 PetriNetUnfolderBase]: 4996/7469 cut-off events. [2024-06-14 12:11:58,950 INFO L125 PetriNetUnfolderBase]: For 732291/732295 co-relation queries the response was YES. [2024-06-14 12:11:59,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77831 conditions, 7469 events. 4996/7469 cut-off events. For 732291/732295 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 41607 event pairs, 1235 based on Foata normal form. 28/7497 useless extension candidates. Maximal degree in co-relation 77723. Up to 5657 conditions per place. [2024-06-14 12:11:59,034 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 385 selfloop transitions, 119 changer transitions 0/507 dead transitions. [2024-06-14 12:11:59,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 507 transitions, 7813 flow [2024-06-14 12:11:59,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 12:11:59,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 12:11:59,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 232 transitions. [2024-06-14 12:11:59,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-14 12:11:59,040 INFO L175 Difference]: Start difference. First operand has 219 places, 323 transitions, 4025 flow. Second operand 12 states and 232 transitions. [2024-06-14 12:11:59,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 507 transitions, 7813 flow [2024-06-14 12:12:00,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 507 transitions, 7532 flow, removed 115 selfloop flow, removed 4 redundant places. [2024-06-14 12:12:00,071 INFO L231 Difference]: Finished difference. Result has 233 places, 415 transitions, 5923 flow [2024-06-14 12:12:00,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3875, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5923, PETRI_PLACES=233, PETRI_TRANSITIONS=415} [2024-06-14 12:12:00,072 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-14 12:12:00,072 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 415 transitions, 5923 flow [2024-06-14 12:12:00,072 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 12:12:00,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:00,073 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 12:12:00,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 12:12:00,073 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:12:00,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:00,073 INFO L85 PathProgramCache]: Analyzing trace with hash 393527662, now seen corresponding path program 3 times [2024-06-14 12:12:00,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:00,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454957493] [2024-06-14 12:12:00,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:00,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:00,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:00,695 INFO 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 12:12:00,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:00,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454957493] [2024-06-14 12:12:00,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454957493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:00,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:00,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:12:00,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235143262] [2024-06-14 12:12:00,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:00,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:12:00,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:00,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:12:00,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:12:00,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:12:00,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 415 transitions, 5923 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 12:12:00,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:00,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:12:00,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:03,026 INFO L124 PetriNetUnfolderBase]: 6648/10119 cut-off events. [2024-06-14 12:12:03,027 INFO L125 PetriNetUnfolderBase]: For 1167888/1167894 co-relation queries the response was YES. [2024-06-14 12:12:03,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115768 conditions, 10119 events. 6648/10119 cut-off events. For 1167888/1167894 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 62104 event pairs, 1427 based on Foata normal form. 30/10149 useless extension candidates. Maximal degree in co-relation 115652. Up to 4659 conditions per place. [2024-06-14 12:12:03,164 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 351 selfloop transitions, 176 changer transitions 0/530 dead transitions. [2024-06-14 12:12:03,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 530 transitions, 9494 flow [2024-06-14 12:12:03,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:12:03,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:12:03,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 220 transitions. [2024-06-14 12:12:03,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-14 12:12:03,166 INFO L175 Difference]: Start difference. First operand has 233 places, 415 transitions, 5923 flow. Second operand 11 states and 220 transitions. [2024-06-14 12:12:03,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 530 transitions, 9494 flow [2024-06-14 12:12:05,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 530 transitions, 9151 flow, removed 167 selfloop flow, removed 2 redundant places. [2024-06-14 12:12:05,320 INFO L231 Difference]: Finished difference. Result has 245 places, 446 transitions, 7182 flow [2024-06-14 12:12:05,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5798, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7182, PETRI_PLACES=245, PETRI_TRANSITIONS=446} [2024-06-14 12:12:05,321 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 202 predicate places. [2024-06-14 12:12:05,321 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 446 transitions, 7182 flow [2024-06-14 12:12:05,321 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 12:12:05,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:05,322 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 12:12:05,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 12:12:05,322 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 12:12:05,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:05,322 INFO L85 PathProgramCache]: Analyzing trace with hash 493292008, now seen corresponding path program 4 times [2024-06-14 12:12:05,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:05,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699247370] [2024-06-14 12:12:05,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:05,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:05,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:06,119 INFO 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 12:12:06,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:06,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699247370] [2024-06-14 12:12:06,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699247370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:06,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:06,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:12:06,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398736060] [2024-06-14 12:12:06,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:06,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:12:06,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:06,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:12:06,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:12:06,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:12:06,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 446 transitions, 7182 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 12:12:06,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:06,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:12:06,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:09,302 INFO L124 PetriNetUnfolderBase]: 8268/12600 cut-off events. [2024-06-14 12:12:09,303 INFO L125 PetriNetUnfolderBase]: For 1535006/1535012 co-relation queries the response was YES. [2024-06-14 12:12:09,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151272 conditions, 12600 events. 8268/12600 cut-off events. For 1535006/1535012 co-relation queries the response was YES. Maximal size of possible extension queue 717. Compared 80662 event pairs, 2412 based on Foata normal form. 46/12646 useless extension candidates. Maximal degree in co-relation 151151. Up to 7572 conditions per place. [2024-06-14 12:12:09,455 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 368 selfloop transitions, 241 changer transitions 0/612 dead transitions. [2024-06-14 12:12:09,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 612 transitions, 11636 flow [2024-06-14 12:12:09,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 12:12:09,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 12:12:09,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 236 transitions. [2024-06-14 12:12:09,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-14 12:12:09,465 INFO L175 Difference]: Start difference. First operand has 245 places, 446 transitions, 7182 flow. Second operand 12 states and 236 transitions. [2024-06-14 12:12:09,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 612 transitions, 11636 flow [2024-06-14 12:12:11,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 612 transitions, 11223 flow, removed 125 selfloop flow, removed 4 redundant places. [2024-06-14 12:12:11,928 INFO L231 Difference]: Finished difference. Result has 257 places, 520 transitions, 9300 flow [2024-06-14 12:12:11,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6933, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9300, PETRI_PLACES=257, PETRI_TRANSITIONS=520} [2024-06-14 12:12:11,929 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 214 predicate places. [2024-06-14 12:12:11,929 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 520 transitions, 9300 flow [2024-06-14 12:12:11,933 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 12:12:11,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:11,933 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 12:12:11,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 12:12:11,933 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 12:12:11,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:11,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1962472060, now seen corresponding path program 5 times [2024-06-14 12:12:11,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:11,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13298474] [2024-06-14 12:12:11,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:11,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:11,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:12,613 INFO 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 12:12:12,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:12,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13298474] [2024-06-14 12:12:12,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13298474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:12,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:12,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:12:12,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255884691] [2024-06-14 12:12:12,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:12,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:12:12,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:12,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:12:12,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:12:12,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:12:12,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 520 transitions, 9300 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 12:12:12,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:12,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:12:12,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:16,763 INFO L124 PetriNetUnfolderBase]: 9852/15052 cut-off events. [2024-06-14 12:12:16,764 INFO L125 PetriNetUnfolderBase]: For 2085671/2085673 co-relation queries the response was YES. [2024-06-14 12:12:16,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190707 conditions, 15052 events. 9852/15052 cut-off events. For 2085671/2085673 co-relation queries the response was YES. Maximal size of possible extension queue 886. Compared 99953 event pairs, 3524 based on Foata normal form. 114/15166 useless extension candidates. Maximal degree in co-relation 190580. Up to 10978 conditions per place. [2024-06-14 12:12:17,090 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 428 selfloop transitions, 247 changer transitions 0/678 dead transitions. [2024-06-14 12:12:17,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 678 transitions, 13852 flow [2024-06-14 12:12:17,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 12:12:17,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 12:12:17,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 232 transitions. [2024-06-14 12:12:17,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-14 12:12:17,091 INFO L175 Difference]: Start difference. First operand has 257 places, 520 transitions, 9300 flow. Second operand 12 states and 232 transitions. [2024-06-14 12:12:17,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 678 transitions, 13852 flow [2024-06-14 12:12:20,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 678 transitions, 13559 flow, removed 113 selfloop flow, removed 5 redundant places. [2024-06-14 12:12:20,427 INFO L231 Difference]: Finished difference. Result has 265 places, 578 transitions, 11132 flow [2024-06-14 12:12:20,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9007, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11132, PETRI_PLACES=265, PETRI_TRANSITIONS=578} [2024-06-14 12:12:20,428 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 222 predicate places. [2024-06-14 12:12:20,428 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 578 transitions, 11132 flow [2024-06-14 12:12:20,428 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 12:12:20,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:20,428 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 12:12:20,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 12:12:20,429 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 12:12:20,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:20,429 INFO L85 PathProgramCache]: Analyzing trace with hash 493382218, now seen corresponding path program 6 times [2024-06-14 12:12:20,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:20,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002410156] [2024-06-14 12:12:20,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:20,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:20,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:21,144 INFO 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 12:12:21,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:21,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002410156] [2024-06-14 12:12:21,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002410156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:21,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:21,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:12:21,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018370127] [2024-06-14 12:12:21,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:21,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:12:21,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:21,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:12:21,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:12:21,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:12:21,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 578 transitions, 11132 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 12:12:21,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:21,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:12:21,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:25,651 INFO L124 PetriNetUnfolderBase]: 9888/15156 cut-off events. [2024-06-14 12:12:25,651 INFO L125 PetriNetUnfolderBase]: For 2082588/2082590 co-relation queries the response was YES. [2024-06-14 12:12:25,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189070 conditions, 15156 events. 9888/15156 cut-off events. For 2082588/2082590 co-relation queries the response was YES. Maximal size of possible extension queue 878. Compared 100917 event pairs, 3834 based on Foata normal form. 134/15290 useless extension candidates. Maximal degree in co-relation 188941. Up to 12670 conditions per place. [2024-06-14 12:12:25,840 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 426 selfloop transitions, 246 changer transitions 0/675 dead transitions. [2024-06-14 12:12:25,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 675 transitions, 14095 flow [2024-06-14 12:12:25,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 12:12:25,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 12:12:25,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 229 transitions. [2024-06-14 12:12:25,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45436507936507936 [2024-06-14 12:12:25,842 INFO L175 Difference]: Start difference. First operand has 265 places, 578 transitions, 11132 flow. Second operand 12 states and 229 transitions. [2024-06-14 12:12:25,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 675 transitions, 14095 flow [2024-06-14 12:12:29,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 675 transitions, 13658 flow, removed 89 selfloop flow, removed 7 redundant places. [2024-06-14 12:12:29,555 INFO L231 Difference]: Finished difference. Result has 272 places, 593 transitions, 11724 flow [2024-06-14 12:12:29,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10695, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11724, PETRI_PLACES=272, PETRI_TRANSITIONS=593} [2024-06-14 12:12:29,556 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 229 predicate places. [2024-06-14 12:12:29,556 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 593 transitions, 11724 flow [2024-06-14 12:12:29,556 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 12:12:29,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:29,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:12:29,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 12:12:29,557 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 12:12:29,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:29,558 INFO L85 PathProgramCache]: Analyzing trace with hash 905302370, now seen corresponding path program 7 times [2024-06-14 12:12:29,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:29,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554152284] [2024-06-14 12:12:29,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:29,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:29,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:30,579 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 12:12:30,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:30,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554152284] [2024-06-14 12:12:30,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554152284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:30,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:30,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:12:30,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588496449] [2024-06-14 12:12:30,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:30,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:12:30,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:30,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:12:30,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:12:30,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:12:30,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 593 transitions, 11724 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 12:12:30,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:30,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:12:30,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:34,835 INFO L124 PetriNetUnfolderBase]: 10183/15608 cut-off events. [2024-06-14 12:12:34,835 INFO L125 PetriNetUnfolderBase]: For 2003640/2003644 co-relation queries the response was YES. [2024-06-14 12:12:34,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193005 conditions, 15608 events. 10183/15608 cut-off events. For 2003640/2003644 co-relation queries the response was YES. Maximal size of possible extension queue 903. Compared 104325 event pairs, 3833 based on Foata normal form. 98/15706 useless extension candidates. Maximal degree in co-relation 192872. Up to 13764 conditions per place. [2024-06-14 12:12:35,047 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 510 selfloop transitions, 177 changer transitions 0/690 dead transitions. [2024-06-14 12:12:35,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 690 transitions, 14484 flow [2024-06-14 12:12:35,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 12:12:35,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 12:12:35,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 239 transitions. [2024-06-14 12:12:35,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43772893772893773 [2024-06-14 12:12:35,049 INFO L175 Difference]: Start difference. First operand has 272 places, 593 transitions, 11724 flow. Second operand 13 states and 239 transitions. [2024-06-14 12:12:35,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 690 transitions, 14484 flow [2024-06-14 12:12:39,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 690 transitions, 13830 flow, removed 92 selfloop flow, removed 9 redundant places. [2024-06-14 12:12:39,153 INFO L231 Difference]: Finished difference. Result has 281 places, 622 transitions, 12378 flow [2024-06-14 12:12:39,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11159, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=12378, PETRI_PLACES=281, PETRI_TRANSITIONS=622} [2024-06-14 12:12:39,154 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 238 predicate places. [2024-06-14 12:12:39,154 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 622 transitions, 12378 flow [2024-06-14 12:12:39,154 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 12:12:39,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:39,154 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 12:12:39,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 12:12:39,154 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 12:12:39,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:39,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1699725742, now seen corresponding path program 8 times [2024-06-14 12:12:39,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:39,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460164830] [2024-06-14 12:12:39,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:39,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:39,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:40,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:12:40,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:40,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460164830] [2024-06-14 12:12:40,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460164830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:40,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:40,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:12:40,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468734636] [2024-06-14 12:12:40,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:40,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:12:40,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:40,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:12:40,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:12:40,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:12:40,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 622 transitions, 12378 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 12:12:40,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:40,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:12:40,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:44,579 INFO L124 PetriNetUnfolderBase]: 10253/15721 cut-off events. [2024-06-14 12:12:44,579 INFO L125 PetriNetUnfolderBase]: For 1869830/1869834 co-relation queries the response was YES. [2024-06-14 12:12:44,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189066 conditions, 15721 events. 10253/15721 cut-off events. For 1869830/1869834 co-relation queries the response was YES. Maximal size of possible extension queue 898. Compared 105099 event pairs, 3508 based on Foata normal form. 76/15797 useless extension candidates. Maximal degree in co-relation 188927. Up to 12291 conditions per place. [2024-06-14 12:12:44,801 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 528 selfloop transitions, 175 changer transitions 0/706 dead transitions. [2024-06-14 12:12:44,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 706 transitions, 15219 flow [2024-06-14 12:12:44,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 12:12:44,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 12:12:44,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 225 transitions. [2024-06-14 12:12:44,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-14 12:12:44,803 INFO L175 Difference]: Start difference. First operand has 281 places, 622 transitions, 12378 flow. Second operand 12 states and 225 transitions. [2024-06-14 12:12:44,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 706 transitions, 15219 flow [2024-06-14 12:12:49,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 706 transitions, 14828 flow, removed 60 selfloop flow, removed 8 redundant places. [2024-06-14 12:12:49,159 INFO L231 Difference]: Finished difference. Result has 286 places, 638 transitions, 13058 flow [2024-06-14 12:12:49,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11989, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=13058, PETRI_PLACES=286, PETRI_TRANSITIONS=638} [2024-06-14 12:12:49,160 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 243 predicate places. [2024-06-14 12:12:49,160 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 638 transitions, 13058 flow [2024-06-14 12:12:49,160 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 12:12:49,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:49,161 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 12:12:49,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 12:12:49,161 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 12:12:49,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:49,161 INFO L85 PathProgramCache]: Analyzing trace with hash 276565636, now seen corresponding path program 1 times [2024-06-14 12:12:49,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:49,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384717018] [2024-06-14 12:12:49,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:49,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:49,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:50,094 INFO 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 12:12:50,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:50,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384717018] [2024-06-14 12:12:50,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384717018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:50,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:50,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:12:50,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049391971] [2024-06-14 12:12:50,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:50,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:12:50,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:50,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:12:50,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:12:50,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:12:50,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 638 transitions, 13058 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 12:12:50,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:50,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:12:50,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:12:54,573 INFO L124 PetriNetUnfolderBase]: 10779/16499 cut-off events. [2024-06-14 12:12:54,574 INFO L125 PetriNetUnfolderBase]: For 1768901/1768907 co-relation queries the response was YES. [2024-06-14 12:12:54,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193979 conditions, 16499 events. 10779/16499 cut-off events. For 1768901/1768907 co-relation queries the response was YES. Maximal size of possible extension queue 926. Compared 110881 event pairs, 3838 based on Foata normal form. 12/16511 useless extension candidates. Maximal degree in co-relation 193838. Up to 15175 conditions per place. [2024-06-14 12:12:54,801 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 582 selfloop transitions, 200 changer transitions 0/785 dead transitions. [2024-06-14 12:12:54,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 785 transitions, 16498 flow [2024-06-14 12:12:54,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:12:54,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:12:54,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-14 12:12:54,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595238095238095 [2024-06-14 12:12:54,802 INFO L175 Difference]: Start difference. First operand has 286 places, 638 transitions, 13058 flow. Second operand 10 states and 193 transitions. [2024-06-14 12:12:54,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 785 transitions, 16498 flow [2024-06-14 12:12:58,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 785 transitions, 16152 flow, removed 83 selfloop flow, removed 8 redundant places. [2024-06-14 12:12:58,821 INFO L231 Difference]: Finished difference. Result has 292 places, 702 transitions, 14206 flow [2024-06-14 12:12:58,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12712, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14206, PETRI_PLACES=292, PETRI_TRANSITIONS=702} [2024-06-14 12:12:58,822 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 249 predicate places. [2024-06-14 12:12:58,822 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 702 transitions, 14206 flow [2024-06-14 12:12:58,822 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 12:12:58,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:12:58,822 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 12:12:58,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 12:12:58,823 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 12:12:58,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:12:58,823 INFO L85 PathProgramCache]: Analyzing trace with hash 276559684, now seen corresponding path program 9 times [2024-06-14 12:12:58,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:12:58,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468377403] [2024-06-14 12:12:58,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:12:58,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:12:58,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:12:59,806 INFO 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 12:12:59,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:12:59,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468377403] [2024-06-14 12:12:59,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468377403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:12:59,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:12:59,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:12:59,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658566979] [2024-06-14 12:12:59,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:12:59,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:12:59,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:12:59,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:12:59,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:12:59,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:12:59,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 702 transitions, 14206 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 12:12:59,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:12:59,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:12:59,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:13:04,891 INFO L124 PetriNetUnfolderBase]: 11027/16879 cut-off events. [2024-06-14 12:13:04,891 INFO L125 PetriNetUnfolderBase]: For 1841986/1841992 co-relation queries the response was YES. [2024-06-14 12:13:05,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197500 conditions, 16879 events. 11027/16879 cut-off events. For 1841986/1841992 co-relation queries the response was YES. Maximal size of possible extension queue 942. Compared 113992 event pairs, 3847 based on Foata normal form. 36/16915 useless extension candidates. Maximal degree in co-relation 197353. Up to 15520 conditions per place. [2024-06-14 12:13:05,136 INFO L140 encePairwiseOnDemand]: 26/42 looper letters, 671 selfloop transitions, 183 changer transitions 0/857 dead transitions. [2024-06-14 12:13:05,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 857 transitions, 18000 flow [2024-06-14 12:13:05,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:13:05,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:13:05,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 213 transitions. [2024-06-14 12:13:05,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.461038961038961 [2024-06-14 12:13:05,137 INFO L175 Difference]: Start difference. First operand has 292 places, 702 transitions, 14206 flow. Second operand 11 states and 213 transitions. [2024-06-14 12:13:05,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 857 transitions, 18000 flow [2024-06-14 12:13:08,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 857 transitions, 17589 flow, removed 97 selfloop flow, removed 3 redundant places. [2024-06-14 12:13:08,778 INFO L231 Difference]: Finished difference. Result has 303 places, 753 transitions, 15247 flow [2024-06-14 12:13:08,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13839, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=702, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15247, PETRI_PLACES=303, PETRI_TRANSITIONS=753} [2024-06-14 12:13:08,779 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 260 predicate places. [2024-06-14 12:13:08,779 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 753 transitions, 15247 flow [2024-06-14 12:13:08,779 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 12:13:08,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:13:08,779 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 12:13:08,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 12:13:08,780 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 12:13:08,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:13:08,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1966717790, now seen corresponding path program 2 times [2024-06-14 12:13:08,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:13:08,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428081362] [2024-06-14 12:13:08,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:13:08,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:13:08,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:13:09,709 INFO 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 12:13:09,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:13:09,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428081362] [2024-06-14 12:13:09,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428081362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:13:09,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:13:09,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:13:09,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495185261] [2024-06-14 12:13:09,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:13:09,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:13:09,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:13:09,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:13:09,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:13:09,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:13:09,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 753 transitions, 15247 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 12:13:09,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:13:09,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:13:09,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand