./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix045_power.opt_pso.opt_rmo.opt_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/mix045_power.opt_pso.opt_rmo.opt_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/mix045_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix045_power.opt_pso.opt_rmo.opt_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 12:32:36,394 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 12:32:36,459 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 12:32:36,464 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 12:32:36,465 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 12:32:36,486 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 12:32:36,486 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 12:32:36,487 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 12:32:36,487 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 12:32:36,491 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 12:32:36,491 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 12:32:36,491 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 12:32:36,492 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 12:32:36,493 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 12:32:36,493 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 12:32:36,493 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 12:32:36,493 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 12:32:36,494 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 12:32:36,494 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 12:32:36,494 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 12:32:36,494 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 12:32:36,495 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 12:32:36,495 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 12:32:36,495 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 12:32:36,495 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 12:32:36,495 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 12:32:36,496 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 12:32:36,496 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 12:32:36,496 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 12:32:36,497 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 12:32:36,497 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 12:32:36,498 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 12:32:36,498 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:32:36,498 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 12:32:36,498 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 12:32:36,498 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 12:32:36,498 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 12:32:36,499 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 12:32:36,499 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 12:32:36,499 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 12:32:36,499 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 12:32:36,499 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 12:32:36,500 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 12:32:36,500 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 12:32:36,713 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 12:32:36,732 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 12:32:36,734 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 12:32:36,735 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 12:32:36,736 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 12:32:36,737 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix045_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.i [2024-06-14 12:32:37,748 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 12:32:37,958 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 12:32:37,959 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix045_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.i [2024-06-14 12:32:37,978 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cdffa790/56f67b9080414913a345d205f2c8f1cb/FLAG51073dd41 [2024-06-14 12:32:37,987 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cdffa790/56f67b9080414913a345d205f2c8f1cb [2024-06-14 12:32:37,989 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 12:32:37,990 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 12:32:37,990 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix045_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-14 12:32:38,150 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 12:32:38,151 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 12:32:38,152 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 12:32:38,152 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 12:32:38,156 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 12:32:38,157 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:32:37" (1/2) ... [2024-06-14 12:32:38,158 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@574006d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:32:38, skipping insertion in model container [2024-06-14 12:32:38,158 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:32:37" (1/2) ... [2024-06-14 12:32:38,160 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6afff79d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:32:38, skipping insertion in model container [2024-06-14 12:32:38,160 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:32:38" (2/2) ... [2024-06-14 12:32:38,160 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@574006d9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:32:38, skipping insertion in model container [2024-06-14 12:32:38,160 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:32:38" (2/2) ... [2024-06-14 12:32:38,160 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 12:32:38,274 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 12:32:38,275 INFO L97 edCorrectnessWitness]: Location invariant before [L829-L829] ((((((((((((((((((! multithreaded || y$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2))) [2024-06-14 12:32:38,275 INFO L97 edCorrectnessWitness]: Location invariant before [L826-L826] ((((((((((((((((((! multithreaded || y$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2))) [2024-06-14 12:32:38,276 INFO L97 edCorrectnessWitness]: Location invariant before [L828-L828] ((((((((((((((((((! multithreaded || y$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2))) [2024-06-14 12:32:38,276 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 12:32:38,276 INFO L106 edCorrectnessWitness]: ghost_update [L824-L824] multithreaded = 1; [2024-06-14 12:32:38,312 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 12:32:38,641 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:32:38,650 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 12:32:38,746 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:32:38,774 INFO L206 MainTranslator]: Completed translation [2024-06-14 12:32:38,774 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:32:38 WrapperNode [2024-06-14 12:32:38,774 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 12:32:38,775 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 12:32:38,775 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 12:32:38,775 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 12:32:38,780 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 12:32:38" (1/1) ... [2024-06-14 12:32:38,796 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 12:32:38" (1/1) ... [2024-06-14 12:32:38,856 INFO L138 Inliner]: procedures = 175, calls = 47, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 151 [2024-06-14 12:32:38,857 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 12:32:38,857 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 12:32:38,858 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 12:32:38,858 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 12:32:38,866 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 12:32:38" (1/1) ... [2024-06-14 12:32:38,867 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 12:32:38" (1/1) ... [2024-06-14 12:32:38,870 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 12:32:38" (1/1) ... [2024-06-14 12:32:38,884 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 12:32:38,884 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 12:32:38" (1/1) ... [2024-06-14 12:32:38,884 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 12:32:38" (1/1) ... [2024-06-14 12:32:38,892 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 12:32:38" (1/1) ... [2024-06-14 12:32:38,893 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 12:32:38" (1/1) ... [2024-06-14 12:32:38,895 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 12:32:38" (1/1) ... [2024-06-14 12:32:38,896 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 12:32:38" (1/1) ... [2024-06-14 12:32:38,898 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 12:32:38,899 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 12:32:38,899 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 12:32:38,899 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 12:32:38,900 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 12:32:38" (1/1) ... [2024-06-14 12:32:38,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:32:38,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 12:32:38,946 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 12:32:38,964 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 12:32:38,986 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 12:32:38,987 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 12:32:38,987 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 12:32:38,988 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 12:32:38,988 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 12:32:38,988 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 12:32:38,988 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 12:32:38,988 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 12:32:38,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 12:32:38,988 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 12:32:38,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 12:32:38,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 12:32:38,990 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 12:32:39,102 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 12:32:39,104 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 12:32:39,425 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 12:32:39,426 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 12:32:39,573 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 12:32:39,574 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 12:32:39,574 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:32:39 BoogieIcfgContainer [2024-06-14 12:32:39,575 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 12:32:39,577 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 12:32:39,577 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 12:32:39,579 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 12:32:39,579 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 12:32:37" (1/4) ... [2024-06-14 12:32:39,580 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32f16f04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:32:39, skipping insertion in model container [2024-06-14 12:32:39,580 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:32:38" (2/4) ... [2024-06-14 12:32:39,581 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32f16f04 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:32:39, skipping insertion in model container [2024-06-14 12:32:39,581 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 12:32:38" (3/4) ... [2024-06-14 12:32:39,581 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32f16f04 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:32:39, skipping insertion in model container [2024-06-14 12:32:39,582 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:32:39" (4/4) ... [2024-06-14 12:32:39,583 INFO L112 eAbstractionObserver]: Analyzing ICFG mix045_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.i [2024-06-14 12:32:39,597 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 12:32:39,597 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 12:32:39,598 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 12:32:39,641 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 12:32:39,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-14 12:32:39,697 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-14 12:32:39,698 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:32:39,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 12:32:39,699 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-14 12:32:39,702 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-14 12:32:39,714 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 12:32:39,723 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;@5620759, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 12:32:39,724 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 12:32:39,728 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 12:32:39,728 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 12:32:39,728 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:32:39,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:39,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 12:32:39,733 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 12:32:39,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:39,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1464887810, now seen corresponding path program 1 times [2024-06-14 12:32:39,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:39,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095933026] [2024-06-14 12:32:39,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:39,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:40,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:40,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:40,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:40,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095933026] [2024-06-14 12:32:40,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095933026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:40,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:40,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 12:32:40,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439594415] [2024-06-14 12:32:40,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:40,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 12:32:40,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:40,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 12:32:40,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 12:32:40,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-14 12:32:40,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 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 12:32:40,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:40,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-14 12:32:40,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:41,288 INFO L124 PetriNetUnfolderBase]: 1359/2150 cut-off events. [2024-06-14 12:32:41,289 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-06-14 12:32:41,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4266 conditions, 2150 events. 1359/2150 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 10717 event pairs, 941 based on Foata normal form. 1/2074 useless extension candidates. Maximal degree in co-relation 4251. Up to 2029 conditions per place. [2024-06-14 12:32:41,305 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 34 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-14 12:32:41,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 179 flow [2024-06-14 12:32:41,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 12:32:41,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 12:32:41,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 74 transitions. [2024-06-14 12:32:41,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5736434108527132 [2024-06-14 12:32:41,317 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 74 transitions. [2024-06-14 12:32:41,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 179 flow [2024-06-14 12:32:41,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 174 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 12:32:41,324 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-14 12:32:41,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-14 12:32:41,328 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-14 12:32:41,328 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-14 12:32:41,328 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 12:32:41,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:41,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:41,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 12:32:41,329 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 12:32:41,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:41,330 INFO L85 PathProgramCache]: Analyzing trace with hash 992120349, now seen corresponding path program 1 times [2024-06-14 12:32:41,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:41,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877470393] [2024-06-14 12:32:41,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:41,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:41,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:42,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:42,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:42,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877470393] [2024-06-14 12:32:42,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877470393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:42,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:42,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 12:32:42,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791890642] [2024-06-14 12:32:42,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:42,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 12:32:42,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:42,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 12:32:42,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 12:32:42,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:32:42,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:42,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:42,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:32:42,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:42,404 INFO L124 PetriNetUnfolderBase]: 1560/2388 cut-off events. [2024-06-14 12:32:42,404 INFO L125 PetriNetUnfolderBase]: For 448/448 co-relation queries the response was YES. [2024-06-14 12:32:42,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5406 conditions, 2388 events. 1560/2388 cut-off events. For 448/448 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 11613 event pairs, 930 based on Foata normal form. 3/2353 useless extension candidates. Maximal degree in co-relation 5391. Up to 2302 conditions per place. [2024-06-14 12:32:42,418 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 42 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-14 12:32:42,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 248 flow [2024-06-14 12:32:42,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 12:32:42,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 12:32:42,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2024-06-14 12:32:42,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5348837209302325 [2024-06-14 12:32:42,422 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 92 transitions. [2024-06-14 12:32:42,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 248 flow [2024-06-14 12:32:42,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 244 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 12:32:42,426 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-14 12:32:42,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-14 12:32:42,426 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-14 12:32:42,427 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-14 12:32:42,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:42,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:42,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:42,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 12:32:42,429 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 12:32:42,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:42,430 INFO L85 PathProgramCache]: Analyzing trace with hash 690960829, now seen corresponding path program 1 times [2024-06-14 12:32:42,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:42,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842306382] [2024-06-14 12:32:42,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:42,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:42,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:43,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:43,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:43,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842306382] [2024-06-14 12:32:43,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842306382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:43,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:43,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 12:32:43,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58863068] [2024-06-14 12:32:43,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:43,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 12:32:43,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:43,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 12:32:43,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 12:32:43,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:32:43,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:43,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:43,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:32:43,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:43,534 INFO L124 PetriNetUnfolderBase]: 1568/2407 cut-off events. [2024-06-14 12:32:43,535 INFO L125 PetriNetUnfolderBase]: For 1320/1320 co-relation queries the response was YES. [2024-06-14 12:32:43,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6042 conditions, 2407 events. 1568/2407 cut-off events. For 1320/1320 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 11818 event pairs, 669 based on Foata normal form. 5/2391 useless extension candidates. Maximal degree in co-relation 6025. Up to 2248 conditions per place. [2024-06-14 12:32:43,545 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 55 selfloop transitions, 16 changer transitions 0/76 dead transitions. [2024-06-14 12:32:43,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 76 transitions, 402 flow [2024-06-14 12:32:43,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:32:43,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:32:43,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-14 12:32:43,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5581395348837209 [2024-06-14 12:32:43,547 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 5 states and 120 transitions. [2024-06-14 12:32:43,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 76 transitions, 402 flow [2024-06-14 12:32:43,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 76 transitions, 388 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-14 12:32:43,550 INFO L231 Difference]: Finished difference. Result has 52 places, 51 transitions, 239 flow [2024-06-14 12:32:43,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=239, PETRI_PLACES=52, PETRI_TRANSITIONS=51} [2024-06-14 12:32:43,551 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 8 predicate places. [2024-06-14 12:32:43,551 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 51 transitions, 239 flow [2024-06-14 12:32:43,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:43,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:43,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:43,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 12:32:43,551 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 12:32:43,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:43,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1706538564, now seen corresponding path program 1 times [2024-06-14 12:32:43,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:43,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210229147] [2024-06-14 12:32:43,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:43,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:43,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:44,367 INFO 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 12:32:44,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:44,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210229147] [2024-06-14 12:32:44,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210229147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:44,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:44,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:32:44,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460447041] [2024-06-14 12:32:44,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:44,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:32:44,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:44,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:32:44,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:32:44,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:32:44,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 51 transitions, 239 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 12:32:44,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:44,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:32:44,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:44,774 INFO L124 PetriNetUnfolderBase]: 1580/2427 cut-off events. [2024-06-14 12:32:44,775 INFO L125 PetriNetUnfolderBase]: For 3142/3145 co-relation queries the response was YES. [2024-06-14 12:32:44,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7186 conditions, 2427 events. 1580/2427 cut-off events. For 3142/3145 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 11935 event pairs, 481 based on Foata normal form. 12/2418 useless extension candidates. Maximal degree in co-relation 7166. Up to 2216 conditions per place. [2024-06-14 12:32:44,787 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 59 selfloop transitions, 19 changer transitions 0/83 dead transitions. [2024-06-14 12:32:44,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 83 transitions, 505 flow [2024-06-14 12:32:44,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:32:44,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:32:44,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-14 12:32:44,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5310077519379846 [2024-06-14 12:32:44,790 INFO L175 Difference]: Start difference. First operand has 52 places, 51 transitions, 239 flow. Second operand 6 states and 137 transitions. [2024-06-14 12:32:44,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 83 transitions, 505 flow [2024-06-14 12:32:44,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 83 transitions, 497 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-14 12:32:44,797 INFO L231 Difference]: Finished difference. Result has 57 places, 53 transitions, 295 flow [2024-06-14 12:32:44,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=295, PETRI_PLACES=57, PETRI_TRANSITIONS=53} [2024-06-14 12:32:44,798 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 13 predicate places. [2024-06-14 12:32:44,798 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 53 transitions, 295 flow [2024-06-14 12:32:44,799 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 12:32:44,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:44,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:44,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 12:32:44,799 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 12:32:44,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:44,800 INFO L85 PathProgramCache]: Analyzing trace with hash 2005809500, now seen corresponding path program 1 times [2024-06-14 12:32:44,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:44,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310753277] [2024-06-14 12:32:44,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:44,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:44,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:45,568 INFO 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 12:32:45,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:45,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310753277] [2024-06-14 12:32:45,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310753277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:45,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:45,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:32:45,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003207467] [2024-06-14 12:32:45,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:45,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:32:45,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:45,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:32:45,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:32:45,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:32:45,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 295 flow. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:45,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:45,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:32:45,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:46,052 INFO L124 PetriNetUnfolderBase]: 1368/2165 cut-off events. [2024-06-14 12:32:46,053 INFO L125 PetriNetUnfolderBase]: For 4021/4021 co-relation queries the response was YES. [2024-06-14 12:32:46,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6937 conditions, 2165 events. 1368/2165 cut-off events. For 4021/4021 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 10910 event pairs, 562 based on Foata normal form. 2/2134 useless extension candidates. Maximal degree in co-relation 6914. Up to 2036 conditions per place. [2024-06-14 12:32:46,065 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 50 selfloop transitions, 8 changer transitions 0/64 dead transitions. [2024-06-14 12:32:46,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 64 transitions, 439 flow [2024-06-14 12:32:46,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:32:46,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:32:46,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2024-06-14 12:32:46,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-14 12:32:46,067 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 295 flow. Second operand 5 states and 96 transitions. [2024-06-14 12:32:46,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 64 transitions, 439 flow [2024-06-14 12:32:46,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 64 transitions, 389 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-14 12:32:46,071 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 269 flow [2024-06-14 12:32:46,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=269, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2024-06-14 12:32:46,071 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2024-06-14 12:32:46,072 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 269 flow [2024-06-14 12:32:46,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:46,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:46,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:46,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 12:32:46,072 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 12:32:46,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:46,073 INFO L85 PathProgramCache]: Analyzing trace with hash 2033918504, now seen corresponding path program 1 times [2024-06-14 12:32:46,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:46,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291180960] [2024-06-14 12:32:46,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:46,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:46,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:46,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:46,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:46,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291180960] [2024-06-14 12:32:46,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291180960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:46,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:46,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:32:46,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262604865] [2024-06-14 12:32:46,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:46,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:32:46,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:46,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:32:46,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:32:46,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:32:46,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 269 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:46,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:46,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:32:46,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:47,349 INFO L124 PetriNetUnfolderBase]: 1358/2223 cut-off events. [2024-06-14 12:32:47,350 INFO L125 PetriNetUnfolderBase]: For 4716/4716 co-relation queries the response was YES. [2024-06-14 12:32:47,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6991 conditions, 2223 events. 1358/2223 cut-off events. For 4716/4716 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 11558 event pairs, 526 based on Foata normal form. 4/2216 useless extension candidates. Maximal degree in co-relation 6966. Up to 2004 conditions per place. [2024-06-14 12:32:47,363 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 55 selfloop transitions, 11 changer transitions 0/72 dead transitions. [2024-06-14 12:32:47,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 72 transitions, 459 flow [2024-06-14 12:32:47,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:32:47,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:32:47,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-14 12:32:47,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 12:32:47,365 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 269 flow. Second operand 6 states and 114 transitions. [2024-06-14 12:32:47,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 72 transitions, 459 flow [2024-06-14 12:32:47,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 72 transitions, 437 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-14 12:32:47,369 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 301 flow [2024-06-14 12:32:47,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=301, PETRI_PLACES=60, PETRI_TRANSITIONS=56} [2024-06-14 12:32:47,371 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 16 predicate places. [2024-06-14 12:32:47,371 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 301 flow [2024-06-14 12:32:47,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:47,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:47,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:47,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 12:32:47,372 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 12:32:47,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:47,373 INFO L85 PathProgramCache]: Analyzing trace with hash -601471343, now seen corresponding path program 1 times [2024-06-14 12:32:47,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:47,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525593542] [2024-06-14 12:32:47,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:47,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:47,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:48,191 INFO 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 12:32:48,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:48,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525593542] [2024-06-14 12:32:48,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525593542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:48,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:48,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:32:48,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69837566] [2024-06-14 12:32:48,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:48,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:32:48,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:48,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:32:48,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:32:48,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:32:48,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 301 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 12:32:48,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:48,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:32:48,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:48,740 INFO L124 PetriNetUnfolderBase]: 1571/2446 cut-off events. [2024-06-14 12:32:48,741 INFO L125 PetriNetUnfolderBase]: For 7150/7156 co-relation queries the response was YES. [2024-06-14 12:32:48,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8421 conditions, 2446 events. 1571/2446 cut-off events. For 7150/7156 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 12126 event pairs, 635 based on Foata normal form. 8/2440 useless extension candidates. Maximal degree in co-relation 8396. Up to 2253 conditions per place. [2024-06-14 12:32:48,757 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 55 selfloop transitions, 19 changer transitions 0/79 dead transitions. [2024-06-14 12:32:48,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 79 transitions, 545 flow [2024-06-14 12:32:48,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:32:48,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:32:48,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-06-14 12:32:48,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-14 12:32:48,758 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 301 flow. Second operand 6 states and 117 transitions. [2024-06-14 12:32:48,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 79 transitions, 545 flow [2024-06-14 12:32:48,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 79 transitions, 515 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-14 12:32:48,763 INFO L231 Difference]: Finished difference. Result has 62 places, 59 transitions, 343 flow [2024-06-14 12:32:48,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=343, PETRI_PLACES=62, PETRI_TRANSITIONS=59} [2024-06-14 12:32:48,764 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 18 predicate places. [2024-06-14 12:32:48,765 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 59 transitions, 343 flow [2024-06-14 12:32:48,765 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 12:32:48,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:48,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:48,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 12:32:48,765 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 12:32:48,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:48,766 INFO L85 PathProgramCache]: Analyzing trace with hash -857360453, now seen corresponding path program 2 times [2024-06-14 12:32:48,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:48,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190878409] [2024-06-14 12:32:48,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:48,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:48,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:49,519 INFO 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 12:32:49,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:49,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190878409] [2024-06-14 12:32:49,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190878409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:49,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:49,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:32:49,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052851852] [2024-06-14 12:32:49,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:49,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:32:49,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:49,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:32:49,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:32:49,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:32:49,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 59 transitions, 343 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 12:32:49,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:49,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:32:49,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:50,089 INFO L124 PetriNetUnfolderBase]: 1559/2419 cut-off events. [2024-06-14 12:32:50,089 INFO L125 PetriNetUnfolderBase]: For 8578/8584 co-relation queries the response was YES. [2024-06-14 12:32:50,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8590 conditions, 2419 events. 1559/2419 cut-off events. For 8578/8584 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11923 event pairs, 649 based on Foata normal form. 3/2403 useless extension candidates. Maximal degree in co-relation 8564. Up to 2237 conditions per place. [2024-06-14 12:32:50,147 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 49 selfloop transitions, 20 changer transitions 0/74 dead transitions. [2024-06-14 12:32:50,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 74 transitions, 519 flow [2024-06-14 12:32:50,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:32:50,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:32:50,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-14 12:32:50,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.437984496124031 [2024-06-14 12:32:50,149 INFO L175 Difference]: Start difference. First operand has 62 places, 59 transitions, 343 flow. Second operand 6 states and 113 transitions. [2024-06-14 12:32:50,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 74 transitions, 519 flow [2024-06-14 12:32:50,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 74 transitions, 490 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 12:32:50,155 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 362 flow [2024-06-14 12:32:50,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=362, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2024-06-14 12:32:50,158 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 21 predicate places. [2024-06-14 12:32:50,158 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 362 flow [2024-06-14 12:32:50,158 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 12:32:50,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:50,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:50,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 12:32:50,159 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 12:32:50,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:50,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1798133161, now seen corresponding path program 1 times [2024-06-14 12:32:50,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:50,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689678023] [2024-06-14 12:32:50,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:50,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:50,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:50,969 INFO 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 12:32:50,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:50,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689678023] [2024-06-14 12:32:50,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689678023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:50,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:50,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:32:50,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996705412] [2024-06-14 12:32:50,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:50,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:32:50,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:50,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:32:50,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:32:51,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:32:51,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 362 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 12:32:51,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:51,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:32:51,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:51,850 INFO L124 PetriNetUnfolderBase]: 1733/2673 cut-off events. [2024-06-14 12:32:51,850 INFO L125 PetriNetUnfolderBase]: For 11482/11488 co-relation queries the response was YES. [2024-06-14 12:32:51,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9949 conditions, 2673 events. 1733/2673 cut-off events. For 11482/11488 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 13238 event pairs, 547 based on Foata normal form. 9/2664 useless extension candidates. Maximal degree in co-relation 9922. Up to 2237 conditions per place. [2024-06-14 12:32:51,865 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 80 selfloop transitions, 39 changer transitions 0/124 dead transitions. [2024-06-14 12:32:51,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 124 transitions, 1001 flow [2024-06-14 12:32:51,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:32:51,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:32:51,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-14 12:32:51,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47093023255813954 [2024-06-14 12:32:51,867 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 362 flow. Second operand 8 states and 162 transitions. [2024-06-14 12:32:51,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 124 transitions, 1001 flow [2024-06-14 12:32:51,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 124 transitions, 875 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 12:32:51,878 INFO L231 Difference]: Finished difference. Result has 70 places, 83 transitions, 583 flow [2024-06-14 12:32:51,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=583, PETRI_PLACES=70, PETRI_TRANSITIONS=83} [2024-06-14 12:32:51,880 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 26 predicate places. [2024-06-14 12:32:51,880 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 83 transitions, 583 flow [2024-06-14 12:32:51,880 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 12:32:51,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:51,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:51,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 12:32:51,881 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 12:32:51,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:51,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1008737709, now seen corresponding path program 2 times [2024-06-14 12:32:51,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:51,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856096785] [2024-06-14 12:32:51,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:51,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:51,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:52,794 INFO 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 12:32:52,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:52,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856096785] [2024-06-14 12:32:52,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856096785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:52,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:52,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:32:52,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081981090] [2024-06-14 12:32:52,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:52,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:32:52,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:52,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:32:52,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:32:52,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:32:52,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 83 transitions, 583 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 12:32:52,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:52,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:32:52,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:53,706 INFO L124 PetriNetUnfolderBase]: 1805/2789 cut-off events. [2024-06-14 12:32:53,706 INFO L125 PetriNetUnfolderBase]: For 14891/14896 co-relation queries the response was YES. [2024-06-14 12:32:53,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11406 conditions, 2789 events. 1805/2789 cut-off events. For 14891/14896 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 13857 event pairs, 550 based on Foata normal form. 12/2783 useless extension candidates. Maximal degree in co-relation 11375. Up to 2285 conditions per place. [2024-06-14 12:32:53,727 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 66 selfloop transitions, 48 changer transitions 0/119 dead transitions. [2024-06-14 12:32:53,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 119 transitions, 1007 flow [2024-06-14 12:32:53,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:32:53,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:32:53,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-14 12:32:53,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46179401993355484 [2024-06-14 12:32:53,730 INFO L175 Difference]: Start difference. First operand has 70 places, 83 transitions, 583 flow. Second operand 7 states and 139 transitions. [2024-06-14 12:32:53,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 119 transitions, 1007 flow [2024-06-14 12:32:53,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 119 transitions, 979 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-14 12:32:53,746 INFO L231 Difference]: Finished difference. Result has 75 places, 90 transitions, 736 flow [2024-06-14 12:32:53,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=555, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=736, PETRI_PLACES=75, PETRI_TRANSITIONS=90} [2024-06-14 12:32:53,748 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 31 predicate places. [2024-06-14 12:32:53,750 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 90 transitions, 736 flow [2024-06-14 12:32:53,750 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 12:32:53,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:53,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:53,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 12:32:53,751 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 12:32:53,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:53,752 INFO L85 PathProgramCache]: Analyzing trace with hash -945411041, now seen corresponding path program 3 times [2024-06-14 12:32:53,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:53,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620168692] [2024-06-14 12:32:53,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:53,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:53,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:54,744 INFO 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 12:32:54,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:54,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620168692] [2024-06-14 12:32:54,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620168692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:54,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:54,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:32:54,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666118593] [2024-06-14 12:32:54,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:54,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:32:54,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:54,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:32:54,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:32:54,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:32:54,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 90 transitions, 736 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 12:32:54,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:54,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:32:54,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:55,651 INFO L124 PetriNetUnfolderBase]: 1841/2833 cut-off events. [2024-06-14 12:32:55,651 INFO L125 PetriNetUnfolderBase]: For 18189/18197 co-relation queries the response was YES. [2024-06-14 12:32:55,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12407 conditions, 2833 events. 1841/2833 cut-off events. For 18189/18197 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 13975 event pairs, 560 based on Foata normal form. 7/2807 useless extension candidates. Maximal degree in co-relation 12374. Up to 2301 conditions per place. [2024-06-14 12:32:55,676 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 63 selfloop transitions, 60 changer transitions 0/128 dead transitions. [2024-06-14 12:32:55,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 128 transitions, 1272 flow [2024-06-14 12:32:55,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:32:55,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:32:55,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-14 12:32:55,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46179401993355484 [2024-06-14 12:32:55,678 INFO L175 Difference]: Start difference. First operand has 75 places, 90 transitions, 736 flow. Second operand 7 states and 139 transitions. [2024-06-14 12:32:55,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 128 transitions, 1272 flow [2024-06-14 12:32:55,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 128 transitions, 1156 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-14 12:32:55,701 INFO L231 Difference]: Finished difference. Result has 78 places, 100 transitions, 884 flow [2024-06-14 12:32:55,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=640, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=884, PETRI_PLACES=78, PETRI_TRANSITIONS=100} [2024-06-14 12:32:55,702 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 34 predicate places. [2024-06-14 12:32:55,702 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 100 transitions, 884 flow [2024-06-14 12:32:55,702 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 12:32:55,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:55,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:55,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 12:32:55,703 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 12:32:55,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:55,703 INFO L85 PathProgramCache]: Analyzing trace with hash 385351465, now seen corresponding path program 4 times [2024-06-14 12:32:55,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:55,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714256834] [2024-06-14 12:32:55,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:55,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:55,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:56,763 INFO 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 12:32:56,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:56,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714256834] [2024-06-14 12:32:56,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714256834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:56,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:56,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:32:56,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126026551] [2024-06-14 12:32:56,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:56,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:32:56,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:56,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:32:56,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:32:56,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:32:56,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 100 transitions, 884 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 12:32:56,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:56,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:32:56,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:57,451 INFO L124 PetriNetUnfolderBase]: 1825/2811 cut-off events. [2024-06-14 12:32:57,451 INFO L125 PetriNetUnfolderBase]: For 18363/18371 co-relation queries the response was YES. [2024-06-14 12:32:57,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12225 conditions, 2811 events. 1825/2811 cut-off events. For 18363/18371 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 13868 event pairs, 572 based on Foata normal form. 7/2787 useless extension candidates. Maximal degree in co-relation 12191. Up to 2294 conditions per place. [2024-06-14 12:32:57,468 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 63 selfloop transitions, 58 changer transitions 0/126 dead transitions. [2024-06-14 12:32:57,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 126 transitions, 1246 flow [2024-06-14 12:32:57,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:32:57,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:32:57,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-14 12:32:57,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584717607973422 [2024-06-14 12:32:57,470 INFO L175 Difference]: Start difference. First operand has 78 places, 100 transitions, 884 flow. Second operand 7 states and 138 transitions. [2024-06-14 12:32:57,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 126 transitions, 1246 flow [2024-06-14 12:32:57,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 126 transitions, 1150 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-14 12:32:57,489 INFO L231 Difference]: Finished difference. Result has 82 places, 100 transitions, 914 flow [2024-06-14 12:32:57,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=788, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=914, PETRI_PLACES=82, PETRI_TRANSITIONS=100} [2024-06-14 12:32:57,490 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 38 predicate places. [2024-06-14 12:32:57,490 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 100 transitions, 914 flow [2024-06-14 12:32:57,490 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 12:32:57,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:57,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:57,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 12:32:57,491 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 12:32:57,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:57,491 INFO L85 PathProgramCache]: Analyzing trace with hash 385597543, now seen corresponding path program 1 times [2024-06-14 12:32:57,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:57,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486959576] [2024-06-14 12:32:57,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:57,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:57,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:58,683 INFO 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 12:32:58,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:58,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486959576] [2024-06-14 12:32:58,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486959576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:58,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:58,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:32:58,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10676650] [2024-06-14 12:32:58,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:58,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:32:58,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:58,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:32:58,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:32:58,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:32:58,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 100 transitions, 914 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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 12:32:58,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:58,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:32:58,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:32:59,354 INFO L124 PetriNetUnfolderBase]: 1610/2582 cut-off events. [2024-06-14 12:32:59,355 INFO L125 PetriNetUnfolderBase]: For 17960/17962 co-relation queries the response was YES. [2024-06-14 12:32:59,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11237 conditions, 2582 events. 1610/2582 cut-off events. For 17960/17962 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 13098 event pairs, 517 based on Foata normal form. 4/2567 useless extension candidates. Maximal degree in co-relation 11201. Up to 2349 conditions per place. [2024-06-14 12:32:59,368 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 104 selfloop transitions, 13 changer transitions 0/123 dead transitions. [2024-06-14 12:32:59,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 123 transitions, 1232 flow [2024-06-14 12:32:59,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:32:59,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:32:59,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-14 12:32:59,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-14 12:32:59,370 INFO L175 Difference]: Start difference. First operand has 82 places, 100 transitions, 914 flow. Second operand 7 states and 131 transitions. [2024-06-14 12:32:59,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 123 transitions, 1232 flow [2024-06-14 12:32:59,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 123 transitions, 1089 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-14 12:32:59,385 INFO L231 Difference]: Finished difference. Result has 83 places, 102 transitions, 830 flow [2024-06-14 12:32:59,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=771, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=830, PETRI_PLACES=83, PETRI_TRANSITIONS=102} [2024-06-14 12:32:59,386 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 39 predicate places. [2024-06-14 12:32:59,386 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 102 transitions, 830 flow [2024-06-14 12:32:59,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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 12:32:59,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:59,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:32:59,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 12:32:59,387 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:32:59,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:59,387 INFO L85 PathProgramCache]: Analyzing trace with hash -170269764, now seen corresponding path program 1 times [2024-06-14 12:32:59,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:59,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578373968] [2024-06-14 12:32:59,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:59,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:59,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:00,179 INFO 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 12:33:00,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:00,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578373968] [2024-06-14 12:33:00,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578373968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:00,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:00,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:33:00,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471133370] [2024-06-14 12:33:00,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:00,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:33:00,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:00,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:33:00,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:33:00,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:33:00,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 102 transitions, 830 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:00,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:00,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:33:00,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:00,565 INFO L124 PetriNetUnfolderBase]: 1607/2582 cut-off events. [2024-06-14 12:33:00,565 INFO L125 PetriNetUnfolderBase]: For 18758/18760 co-relation queries the response was YES. [2024-06-14 12:33:00,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11176 conditions, 2582 events. 1607/2582 cut-off events. For 18758/18760 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 13181 event pairs, 556 based on Foata normal form. 1/2564 useless extension candidates. Maximal degree in co-relation 11139. Up to 2387 conditions per place. [2024-06-14 12:33:00,580 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 99 selfloop transitions, 8 changer transitions 0/113 dead transitions. [2024-06-14 12:33:00,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 113 transitions, 1090 flow [2024-06-14 12:33:00,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:33:00,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:33:00,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-06-14 12:33:00,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42790697674418604 [2024-06-14 12:33:00,582 INFO L175 Difference]: Start difference. First operand has 83 places, 102 transitions, 830 flow. Second operand 5 states and 92 transitions. [2024-06-14 12:33:00,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 113 transitions, 1090 flow [2024-06-14 12:33:00,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 113 transitions, 1049 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 12:33:00,599 INFO L231 Difference]: Finished difference. Result has 83 places, 105 transitions, 839 flow [2024-06-14 12:33:00,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=789, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=839, PETRI_PLACES=83, PETRI_TRANSITIONS=105} [2024-06-14 12:33:00,600 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 39 predicate places. [2024-06-14 12:33:00,600 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 105 transitions, 839 flow [2024-06-14 12:33:00,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:00,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:00,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:00,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 12:33:00,602 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 12:33:00,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:00,602 INFO L85 PathProgramCache]: Analyzing trace with hash -2135121005, now seen corresponding path program 1 times [2024-06-14 12:33:00,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:00,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143472162] [2024-06-14 12:33:00,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:00,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:00,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:01,393 INFO 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 12:33:01,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:01,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143472162] [2024-06-14 12:33:01,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143472162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:01,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:01,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:33:01,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440899955] [2024-06-14 12:33:01,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:01,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:33:01,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:01,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:33:01,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:33:01,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:33:01,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 105 transitions, 839 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:01,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:01,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:33:01,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:02,109 INFO L124 PetriNetUnfolderBase]: 1858/2892 cut-off events. [2024-06-14 12:33:02,109 INFO L125 PetriNetUnfolderBase]: For 25331/25340 co-relation queries the response was YES. [2024-06-14 12:33:02,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13082 conditions, 2892 events. 1858/2892 cut-off events. For 25331/25340 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 14413 event pairs, 572 based on Foata normal form. 14/2902 useless extension candidates. Maximal degree in co-relation 13044. Up to 2316 conditions per place. [2024-06-14 12:33:02,126 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 75 selfloop transitions, 63 changer transitions 0/143 dead transitions. [2024-06-14 12:33:02,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 143 transitions, 1341 flow [2024-06-14 12:33:02,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:33:02,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:33:02,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-14 12:33:02,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4750830564784053 [2024-06-14 12:33:02,127 INFO L175 Difference]: Start difference. First operand has 83 places, 105 transitions, 839 flow. Second operand 7 states and 143 transitions. [2024-06-14 12:33:02,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 143 transitions, 1341 flow [2024-06-14 12:33:02,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 143 transitions, 1313 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-14 12:33:02,146 INFO L231 Difference]: Finished difference. Result has 87 places, 111 transitions, 1024 flow [2024-06-14 12:33:02,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1024, PETRI_PLACES=87, PETRI_TRANSITIONS=111} [2024-06-14 12:33:02,146 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 43 predicate places. [2024-06-14 12:33:02,146 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 111 transitions, 1024 flow [2024-06-14 12:33:02,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:02,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:02,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:02,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 12:33:02,147 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:33:02,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:02,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1806658007, now seen corresponding path program 2 times [2024-06-14 12:33:02,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:02,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372977083] [2024-06-14 12:33:02,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:02,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:02,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:02,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:02,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:02,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372977083] [2024-06-14 12:33:02,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372977083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:02,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:02,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:33:02,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233902606] [2024-06-14 12:33:02,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:02,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:33:02,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:02,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:33:02,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:33:02,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:33:02,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 111 transitions, 1024 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:02,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:02,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:33:02,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:03,608 INFO L124 PetriNetUnfolderBase]: 1890/2948 cut-off events. [2024-06-14 12:33:03,608 INFO L125 PetriNetUnfolderBase]: For 29555/29560 co-relation queries the response was YES. [2024-06-14 12:33:03,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13980 conditions, 2948 events. 1890/2948 cut-off events. For 29555/29560 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 14813 event pairs, 558 based on Foata normal form. 8/2952 useless extension candidates. Maximal degree in co-relation 13941. Up to 2345 conditions per place. [2024-06-14 12:33:03,625 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 76 selfloop transitions, 65 changer transitions 0/146 dead transitions. [2024-06-14 12:33:03,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 146 transitions, 1536 flow [2024-06-14 12:33:03,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:33:03,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:33:03,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-14 12:33:03,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46179401993355484 [2024-06-14 12:33:03,627 INFO L175 Difference]: Start difference. First operand has 87 places, 111 transitions, 1024 flow. Second operand 7 states and 139 transitions. [2024-06-14 12:33:03,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 146 transitions, 1536 flow [2024-06-14 12:33:03,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 146 transitions, 1321 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-14 12:33:03,646 INFO L231 Difference]: Finished difference. Result has 88 places, 117 transitions, 1040 flow [2024-06-14 12:33:03,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=827, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1040, PETRI_PLACES=88, PETRI_TRANSITIONS=117} [2024-06-14 12:33:03,646 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 44 predicate places. [2024-06-14 12:33:03,646 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 117 transitions, 1040 flow [2024-06-14 12:33:03,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:03,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:03,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:03,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 12:33:03,647 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 12:33:03,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:03,648 INFO L85 PathProgramCache]: Analyzing trace with hash 717710819, now seen corresponding path program 3 times [2024-06-14 12:33:03,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:03,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874641954] [2024-06-14 12:33:03,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:03,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:03,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:04,430 INFO 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 12:33:04,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:04,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874641954] [2024-06-14 12:33:04,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874641954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:04,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:04,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:33:04,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766491673] [2024-06-14 12:33:04,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:04,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:33:04,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:04,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:33:04,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:33:04,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:33:04,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 117 transitions, 1040 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:04,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:04,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:33:04,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:05,130 INFO L124 PetriNetUnfolderBase]: 1874/2926 cut-off events. [2024-06-14 12:33:05,130 INFO L125 PetriNetUnfolderBase]: For 30792/30803 co-relation queries the response was YES. [2024-06-14 12:33:05,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13883 conditions, 2926 events. 1874/2926 cut-off events. For 30792/30803 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 14632 event pairs, 576 based on Foata normal form. 9/2920 useless extension candidates. Maximal degree in co-relation 13844. Up to 2332 conditions per place. [2024-06-14 12:33:05,148 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 73 selfloop transitions, 62 changer transitions 0/140 dead transitions. [2024-06-14 12:33:05,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 140 transitions, 1384 flow [2024-06-14 12:33:05,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:33:05,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:33:05,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-14 12:33:05,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43853820598006643 [2024-06-14 12:33:05,152 INFO L175 Difference]: Start difference. First operand has 88 places, 117 transitions, 1040 flow. Second operand 7 states and 132 transitions. [2024-06-14 12:33:05,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 140 transitions, 1384 flow [2024-06-14 12:33:05,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 140 transitions, 1246 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-14 12:33:05,179 INFO L231 Difference]: Finished difference. Result has 91 places, 117 transitions, 1037 flow [2024-06-14 12:33:05,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=902, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1037, PETRI_PLACES=91, PETRI_TRANSITIONS=117} [2024-06-14 12:33:05,180 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 47 predicate places. [2024-06-14 12:33:05,180 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 117 transitions, 1037 flow [2024-06-14 12:33:05,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:05,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:05,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:05,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 12:33:05,181 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:33:05,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:05,181 INFO L85 PathProgramCache]: Analyzing trace with hash -983393724, now seen corresponding path program 1 times [2024-06-14 12:33:05,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:05,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925957450] [2024-06-14 12:33:05,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:05,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:05,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:05,969 INFO 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 12:33:05,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:05,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925957450] [2024-06-14 12:33:05,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925957450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:05,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:05,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:33:05,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442831260] [2024-06-14 12:33:05,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:05,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:33:05,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:05,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:33:05,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:33:06,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:33:06,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 117 transitions, 1037 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 12:33:06,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:06,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:33:06,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:06,424 INFO L124 PetriNetUnfolderBase]: 1871/2936 cut-off events. [2024-06-14 12:33:06,424 INFO L125 PetriNetUnfolderBase]: For 33476/33478 co-relation queries the response was YES. [2024-06-14 12:33:06,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14024 conditions, 2936 events. 1871/2936 cut-off events. For 33476/33478 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 14794 event pairs, 671 based on Foata normal form. 1/2934 useless extension candidates. Maximal degree in co-relation 13984. Up to 2765 conditions per place. [2024-06-14 12:33:06,441 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 113 selfloop transitions, 11 changer transitions 0/129 dead transitions. [2024-06-14 12:33:06,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 129 transitions, 1337 flow [2024-06-14 12:33:06,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:33:06,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:33:06,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-14 12:33:06,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39147286821705424 [2024-06-14 12:33:06,442 INFO L175 Difference]: Start difference. First operand has 91 places, 117 transitions, 1037 flow. Second operand 6 states and 101 transitions. [2024-06-14 12:33:06,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 129 transitions, 1337 flow [2024-06-14 12:33:06,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 129 transitions, 1154 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 12:33:06,469 INFO L231 Difference]: Finished difference. Result has 90 places, 120 transitions, 914 flow [2024-06-14 12:33:06,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=854, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=914, PETRI_PLACES=90, PETRI_TRANSITIONS=120} [2024-06-14 12:33:06,470 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 46 predicate places. [2024-06-14 12:33:06,470 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 120 transitions, 914 flow [2024-06-14 12:33:06,470 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 12:33:06,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:06,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:06,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 12:33:06,471 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 12:33:06,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:06,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1882393716, now seen corresponding path program 1 times [2024-06-14 12:33:06,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:06,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54456139] [2024-06-14 12:33:06,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:06,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:06,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:07,332 INFO 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 12:33:07,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:07,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54456139] [2024-06-14 12:33:07,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54456139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:07,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:07,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:33:07,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102309674] [2024-06-14 12:33:07,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:07,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:33:07,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:07,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:33:07,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:33:07,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:33:07,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 120 transitions, 914 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:07,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:07,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:33:07,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:07,942 INFO L124 PetriNetUnfolderBase]: 1951/3024 cut-off events. [2024-06-14 12:33:07,943 INFO L125 PetriNetUnfolderBase]: For 41727/41732 co-relation queries the response was YES. [2024-06-14 12:33:07,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14971 conditions, 3024 events. 1951/3024 cut-off events. For 41727/41732 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 15239 event pairs, 476 based on Foata normal form. 6/3026 useless extension candidates. Maximal degree in co-relation 14930. Up to 2613 conditions per place. [2024-06-14 12:33:07,956 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 112 selfloop transitions, 32 changer transitions 0/150 dead transitions. [2024-06-14 12:33:07,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 150 transitions, 1388 flow [2024-06-14 12:33:07,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:33:07,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:33:07,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-14 12:33:07,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 12:33:07,958 INFO L175 Difference]: Start difference. First operand has 90 places, 120 transitions, 914 flow. Second operand 7 states and 133 transitions. [2024-06-14 12:33:07,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 150 transitions, 1388 flow [2024-06-14 12:33:07,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 150 transitions, 1350 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 12:33:07,977 INFO L231 Difference]: Finished difference. Result has 93 places, 124 transitions, 995 flow [2024-06-14 12:33:07,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=876, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=995, PETRI_PLACES=93, PETRI_TRANSITIONS=124} [2024-06-14 12:33:07,977 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 49 predicate places. [2024-06-14 12:33:07,977 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 124 transitions, 995 flow [2024-06-14 12:33:07,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:07,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:07,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:07,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 12:33:07,978 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 12:33:07,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:07,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1879536756, now seen corresponding path program 2 times [2024-06-14 12:33:07,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:07,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594577256] [2024-06-14 12:33:07,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:07,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:07,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:08,693 INFO 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 12:33:08,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:08,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594577256] [2024-06-14 12:33:08,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594577256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:08,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:08,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:33:08,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204422662] [2024-06-14 12:33:08,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:08,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:33:08,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:08,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:33:08,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:33:08,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:33:08,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 124 transitions, 995 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:08,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:08,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:33:08,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:09,308 INFO L124 PetriNetUnfolderBase]: 1943/3011 cut-off events. [2024-06-14 12:33:09,309 INFO L125 PetriNetUnfolderBase]: For 45953/45958 co-relation queries the response was YES. [2024-06-14 12:33:09,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15375 conditions, 3011 events. 1943/3011 cut-off events. For 45953/45958 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 15190 event pairs, 614 based on Foata normal form. 6/3013 useless extension candidates. Maximal degree in co-relation 15333. Up to 2689 conditions per place. [2024-06-14 12:33:09,326 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 109 selfloop transitions, 33 changer transitions 0/148 dead transitions. [2024-06-14 12:33:09,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 148 transitions, 1357 flow [2024-06-14 12:33:09,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:33:09,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:33:09,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-14 12:33:09,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-14 12:33:09,328 INFO L175 Difference]: Start difference. First operand has 93 places, 124 transitions, 995 flow. Second operand 7 states and 131 transitions. [2024-06-14 12:33:09,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 148 transitions, 1357 flow [2024-06-14 12:33:09,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 148 transitions, 1297 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-14 12:33:09,353 INFO L231 Difference]: Finished difference. Result has 97 places, 124 transitions, 1010 flow [2024-06-14 12:33:09,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=935, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1010, PETRI_PLACES=97, PETRI_TRANSITIONS=124} [2024-06-14 12:33:09,354 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 53 predicate places. [2024-06-14 12:33:09,354 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 124 transitions, 1010 flow [2024-06-14 12:33:09,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:09,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:09,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:09,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 12:33:09,355 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 12:33:09,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:09,355 INFO L85 PathProgramCache]: Analyzing trace with hash 171831216, now seen corresponding path program 1 times [2024-06-14 12:33:09,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:09,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756802209] [2024-06-14 12:33:09,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:09,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:09,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:10,597 INFO 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 12:33:10,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:10,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756802209] [2024-06-14 12:33:10,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756802209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:10,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:10,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:33:10,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579192868] [2024-06-14 12:33:10,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:10,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:33:10,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:10,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:33:10,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:33:10,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:33:10,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 124 transitions, 1010 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 12:33:10,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:10,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:33:10,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:11,490 INFO L124 PetriNetUnfolderBase]: 2035/3159 cut-off events. [2024-06-14 12:33:11,490 INFO L125 PetriNetUnfolderBase]: For 54647/54652 co-relation queries the response was YES. [2024-06-14 12:33:11,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16304 conditions, 3159 events. 2035/3159 cut-off events. For 54647/54652 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 16175 event pairs, 552 based on Foata normal form. 24/3179 useless extension candidates. Maximal degree in co-relation 16260. Up to 2389 conditions per place. [2024-06-14 12:33:11,510 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 85 selfloop transitions, 70 changer transitions 0/161 dead transitions. [2024-06-14 12:33:11,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 161 transitions, 1458 flow [2024-06-14 12:33:11,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:33:11,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:33:11,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-14 12:33:11,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-14 12:33:11,512 INFO L175 Difference]: Start difference. First operand has 97 places, 124 transitions, 1010 flow. Second operand 8 states and 157 transitions. [2024-06-14 12:33:11,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 161 transitions, 1458 flow [2024-06-14 12:33:11,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 161 transitions, 1383 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 12:33:11,540 INFO L231 Difference]: Finished difference. Result has 99 places, 126 transitions, 1117 flow [2024-06-14 12:33:11,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=935, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1117, PETRI_PLACES=99, PETRI_TRANSITIONS=126} [2024-06-14 12:33:11,541 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 55 predicate places. [2024-06-14 12:33:11,541 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 126 transitions, 1117 flow [2024-06-14 12:33:11,541 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 12:33:11,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:11,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:11,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 12:33:11,542 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:33:11,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:11,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1290748935, now seen corresponding path program 1 times [2024-06-14 12:33:11,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:11,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933561454] [2024-06-14 12:33:11,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:11,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:11,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:12,279 INFO 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 12:33:12,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:12,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933561454] [2024-06-14 12:33:12,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933561454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:12,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:12,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:33:12,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017762740] [2024-06-14 12:33:12,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:12,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:33:12,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:12,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:33:12,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:33:12,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:33:12,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 126 transitions, 1117 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 12:33:12,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:12,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:33:12,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:12,822 INFO L124 PetriNetUnfolderBase]: 2068/3207 cut-off events. [2024-06-14 12:33:12,822 INFO L125 PetriNetUnfolderBase]: For 56127/56133 co-relation queries the response was YES. [2024-06-14 12:33:12,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17111 conditions, 3207 events. 2068/3207 cut-off events. For 56127/56133 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 16296 event pairs, 651 based on Foata normal form. 7/3211 useless extension candidates. Maximal degree in co-relation 17066. Up to 3012 conditions per place. [2024-06-14 12:33:12,846 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 126 selfloop transitions, 13 changer transitions 0/145 dead transitions. [2024-06-14 12:33:12,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 145 transitions, 1477 flow [2024-06-14 12:33:12,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:33:12,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:33:12,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-14 12:33:12,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41472868217054265 [2024-06-14 12:33:12,848 INFO L175 Difference]: Start difference. First operand has 99 places, 126 transitions, 1117 flow. Second operand 6 states and 107 transitions. [2024-06-14 12:33:12,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 145 transitions, 1477 flow [2024-06-14 12:33:12,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 145 transitions, 1329 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 12:33:12,899 INFO L231 Difference]: Finished difference. Result has 99 places, 129 transitions, 1036 flow [2024-06-14 12:33:12,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=969, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1036, PETRI_PLACES=99, PETRI_TRANSITIONS=129} [2024-06-14 12:33:12,900 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 55 predicate places. [2024-06-14 12:33:12,900 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 129 transitions, 1036 flow [2024-06-14 12:33:12,901 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 12:33:12,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:12,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:12,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 12:33:12,902 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 12:33:12,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:12,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1191780648, now seen corresponding path program 2 times [2024-06-14 12:33:12,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:12,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129874075] [2024-06-14 12:33:12,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:12,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:12,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:14,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:14,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:14,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129874075] [2024-06-14 12:33:14,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129874075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:14,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:14,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:33:14,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879835454] [2024-06-14 12:33:14,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:14,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:33:14,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:14,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:33:14,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:33:14,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:33:14,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 129 transitions, 1036 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 12:33:14,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:14,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:33:14,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:14,990 INFO L124 PetriNetUnfolderBase]: 2085/3206 cut-off events. [2024-06-14 12:33:14,990 INFO L125 PetriNetUnfolderBase]: For 60726/60734 co-relation queries the response was YES. [2024-06-14 12:33:15,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17285 conditions, 3206 events. 2085/3206 cut-off events. For 60726/60734 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 16146 event pairs, 572 based on Foata normal form. 5/3185 useless extension candidates. Maximal degree in co-relation 17239. Up to 2600 conditions per place. [2024-06-14 12:33:15,012 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 80 selfloop transitions, 74 changer transitions 0/160 dead transitions. [2024-06-14 12:33:15,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 160 transitions, 1468 flow [2024-06-14 12:33:15,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:33:15,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:33:15,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 12:33:15,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-14 12:33:15,014 INFO L175 Difference]: Start difference. First operand has 99 places, 129 transitions, 1036 flow. Second operand 8 states and 151 transitions. [2024-06-14 12:33:15,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 160 transitions, 1468 flow [2024-06-14 12:33:15,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 160 transitions, 1425 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-14 12:33:15,062 INFO L231 Difference]: Finished difference. Result has 103 places, 131 transitions, 1185 flow [2024-06-14 12:33:15,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=993, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1185, PETRI_PLACES=103, PETRI_TRANSITIONS=131} [2024-06-14 12:33:15,062 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 59 predicate places. [2024-06-14 12:33:15,062 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 131 transitions, 1185 flow [2024-06-14 12:33:15,063 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 12:33:15,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:15,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:15,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 12:33:15,063 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 12:33:15,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:15,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1711820394, now seen corresponding path program 3 times [2024-06-14 12:33:15,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:15,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938018215] [2024-06-14 12:33:15,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:15,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:15,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:16,317 INFO 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 12:33:16,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:16,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938018215] [2024-06-14 12:33:16,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938018215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:16,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:16,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:33:16,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578103549] [2024-06-14 12:33:16,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:16,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:33:16,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:16,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:33:16,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:33:16,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:33:16,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 131 transitions, 1185 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 12:33:16,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:16,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:33:16,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:17,158 INFO L124 PetriNetUnfolderBase]: 2102/3233 cut-off events. [2024-06-14 12:33:17,158 INFO L125 PetriNetUnfolderBase]: For 67605/67613 co-relation queries the response was YES. [2024-06-14 12:33:17,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18250 conditions, 3233 events. 2102/3233 cut-off events. For 67605/67613 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 16314 event pairs, 518 based on Foata normal form. 5/3212 useless extension candidates. Maximal degree in co-relation 18203. Up to 2389 conditions per place. [2024-06-14 12:33:17,178 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 83 selfloop transitions, 81 changer transitions 0/170 dead transitions. [2024-06-14 12:33:17,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 170 transitions, 1777 flow [2024-06-14 12:33:17,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:33:17,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:33:17,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-14 12:33:17,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-14 12:33:17,179 INFO L175 Difference]: Start difference. First operand has 103 places, 131 transitions, 1185 flow. Second operand 8 states and 157 transitions. [2024-06-14 12:33:17,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 170 transitions, 1777 flow [2024-06-14 12:33:17,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 170 transitions, 1605 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-14 12:33:17,224 INFO L231 Difference]: Finished difference. Result has 105 places, 135 transitions, 1258 flow [2024-06-14 12:33:17,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1013, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1258, PETRI_PLACES=105, PETRI_TRANSITIONS=135} [2024-06-14 12:33:17,225 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 61 predicate places. [2024-06-14 12:33:17,225 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 135 transitions, 1258 flow [2024-06-14 12:33:17,225 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 12:33:17,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:17,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:17,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 12:33:17,225 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 12:33:17,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:17,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1475348364, now seen corresponding path program 4 times [2024-06-14 12:33:17,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:17,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420766752] [2024-06-14 12:33:17,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:17,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:17,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:18,551 INFO 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 12:33:18,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:18,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420766752] [2024-06-14 12:33:18,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420766752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:18,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:18,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:33:18,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161628107] [2024-06-14 12:33:18,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:18,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:33:18,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:18,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:33:18,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:33:18,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:33:18,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 135 transitions, 1258 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 12:33:18,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:18,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:33:18,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:19,562 INFO L124 PetriNetUnfolderBase]: 2094/3225 cut-off events. [2024-06-14 12:33:19,562 INFO L125 PetriNetUnfolderBase]: For 72703/72711 co-relation queries the response was YES. [2024-06-14 12:33:19,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18479 conditions, 3225 events. 2094/3225 cut-off events. For 72703/72711 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 16270 event pairs, 582 based on Foata normal form. 5/3204 useless extension candidates. Maximal degree in co-relation 18431. Up to 2615 conditions per place. [2024-06-14 12:33:19,584 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 86 selfloop transitions, 72 changer transitions 0/164 dead transitions. [2024-06-14 12:33:19,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 164 transitions, 1664 flow [2024-06-14 12:33:19,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:33:19,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:33:19,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 12:33:19,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 12:33:19,586 INFO L175 Difference]: Start difference. First operand has 105 places, 135 transitions, 1258 flow. Second operand 8 states and 152 transitions. [2024-06-14 12:33:19,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 164 transitions, 1664 flow [2024-06-14 12:33:19,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 164 transitions, 1472 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-14 12:33:19,642 INFO L231 Difference]: Finished difference. Result has 108 places, 135 transitions, 1218 flow [2024-06-14 12:33:19,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1066, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1218, PETRI_PLACES=108, PETRI_TRANSITIONS=135} [2024-06-14 12:33:19,643 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 64 predicate places. [2024-06-14 12:33:19,643 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 135 transitions, 1218 flow [2024-06-14 12:33:19,643 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 12:33:19,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:19,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:19,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 12:33:19,643 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:33:19,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:19,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1279321095, now seen corresponding path program 2 times [2024-06-14 12:33:19,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:19,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981149498] [2024-06-14 12:33:19,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:19,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:19,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:20,532 INFO 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 12:33:20,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:20,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981149498] [2024-06-14 12:33:20,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981149498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:20,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:20,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:33:20,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556431024] [2024-06-14 12:33:20,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:20,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:33:20,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:20,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:33:20,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:33:20,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:33:20,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 135 transitions, 1218 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 12:33:20,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:20,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:33:20,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:21,062 INFO L124 PetriNetUnfolderBase]: 2091/3250 cut-off events. [2024-06-14 12:33:21,062 INFO L125 PetriNetUnfolderBase]: For 75869/75887 co-relation queries the response was YES. [2024-06-14 12:33:21,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18432 conditions, 3250 events. 2091/3250 cut-off events. For 75869/75887 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 16566 event pairs, 644 based on Foata normal form. 13/3256 useless extension candidates. Maximal degree in co-relation 18383. Up to 3044 conditions per place. [2024-06-14 12:33:21,082 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 125 selfloop transitions, 18 changer transitions 0/149 dead transitions. [2024-06-14 12:33:21,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 149 transitions, 1578 flow [2024-06-14 12:33:21,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:33:21,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:33:21,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-14 12:33:21,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3992248062015504 [2024-06-14 12:33:21,083 INFO L175 Difference]: Start difference. First operand has 108 places, 135 transitions, 1218 flow. Second operand 6 states and 103 transitions. [2024-06-14 12:33:21,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 149 transitions, 1578 flow [2024-06-14 12:33:21,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 149 transitions, 1403 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 12:33:21,120 INFO L231 Difference]: Finished difference. Result has 107 places, 138 transitions, 1127 flow [2024-06-14 12:33:21,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1043, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1127, PETRI_PLACES=107, PETRI_TRANSITIONS=138} [2024-06-14 12:33:21,121 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 63 predicate places. [2024-06-14 12:33:21,121 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 138 transitions, 1127 flow [2024-06-14 12:33:21,121 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 12:33:21,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:21,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:21,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 12:33:21,122 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 12:33:21,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:21,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1279522533, now seen corresponding path program 1 times [2024-06-14 12:33:21,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:21,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404309180] [2024-06-14 12:33:21,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:21,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:21,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:21,820 INFO 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 12:33:21,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:21,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404309180] [2024-06-14 12:33:21,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404309180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:21,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:21,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:33:21,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472950960] [2024-06-14 12:33:21,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:21,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:33:21,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:21,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:33:21,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:33:21,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:33:21,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 138 transitions, 1127 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:21,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:21,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:33:21,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:22,473 INFO L124 PetriNetUnfolderBase]: 1889/3018 cut-off events. [2024-06-14 12:33:22,473 INFO L125 PetriNetUnfolderBase]: For 69233/69235 co-relation queries the response was YES. [2024-06-14 12:33:22,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16743 conditions, 3018 events. 1889/3018 cut-off events. For 69233/69235 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 15816 event pairs, 598 based on Foata normal form. 1/3016 useless extension candidates. Maximal degree in co-relation 16693. Up to 2773 conditions per place. [2024-06-14 12:33:22,494 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 135 selfloop transitions, 11 changer transitions 0/153 dead transitions. [2024-06-14 12:33:22,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 153 transitions, 1485 flow [2024-06-14 12:33:22,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:33:22,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:33:22,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-14 12:33:22,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42248062015503873 [2024-06-14 12:33:22,497 INFO L175 Difference]: Start difference. First operand has 107 places, 138 transitions, 1127 flow. Second operand 6 states and 109 transitions. [2024-06-14 12:33:22,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 153 transitions, 1485 flow [2024-06-14 12:33:22,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 153 transitions, 1423 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-14 12:33:22,538 INFO L231 Difference]: Finished difference. Result has 109 places, 141 transitions, 1129 flow [2024-06-14 12:33:22,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1065, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1129, PETRI_PLACES=109, PETRI_TRANSITIONS=141} [2024-06-14 12:33:22,538 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 65 predicate places. [2024-06-14 12:33:22,538 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 141 transitions, 1129 flow [2024-06-14 12:33:22,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:22,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:22,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:22,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 12:33:22,539 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:33:22,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:22,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1279315143, now seen corresponding path program 2 times [2024-06-14 12:33:22,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:22,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502195738] [2024-06-14 12:33:22,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:22,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:22,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:23,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:23,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:23,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502195738] [2024-06-14 12:33:23,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502195738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:23,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:23,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:33:23,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168453760] [2024-06-14 12:33:23,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:23,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:33:23,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:23,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:33:23,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:33:23,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:33:23,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 141 transitions, 1129 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:23,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:23,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:33:23,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:23,891 INFO L124 PetriNetUnfolderBase]: 1886/3015 cut-off events. [2024-06-14 12:33:23,891 INFO L125 PetriNetUnfolderBase]: For 73774/73779 co-relation queries the response was YES. [2024-06-14 12:33:23,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17107 conditions, 3015 events. 1886/3015 cut-off events. For 73774/73779 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15855 event pairs, 602 based on Foata normal form. 3/3014 useless extension candidates. Maximal degree in co-relation 17056. Up to 2763 conditions per place. [2024-06-14 12:33:23,909 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 130 selfloop transitions, 16 changer transitions 0/153 dead transitions. [2024-06-14 12:33:23,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 153 transitions, 1483 flow [2024-06-14 12:33:23,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:33:23,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:33:23,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-14 12:33:23,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 12:33:23,911 INFO L175 Difference]: Start difference. First operand has 109 places, 141 transitions, 1129 flow. Second operand 6 states and 108 transitions. [2024-06-14 12:33:23,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 153 transitions, 1483 flow [2024-06-14 12:33:23,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 153 transitions, 1441 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 12:33:23,950 INFO L231 Difference]: Finished difference. Result has 111 places, 144 transitions, 1167 flow [2024-06-14 12:33:23,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1087, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1167, PETRI_PLACES=111, PETRI_TRANSITIONS=144} [2024-06-14 12:33:23,951 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 67 predicate places. [2024-06-14 12:33:23,951 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 144 transitions, 1167 flow [2024-06-14 12:33:23,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:23,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:23,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:23,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 12:33:23,952 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:33:23,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:23,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1279307207, now seen corresponding path program 1 times [2024-06-14 12:33:23,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:23,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171366578] [2024-06-14 12:33:23,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:23,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:23,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:24,819 INFO 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 12:33:24,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:24,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171366578] [2024-06-14 12:33:24,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171366578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:24,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:24,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:33:24,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598142432] [2024-06-14 12:33:24,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:24,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:33:24,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:24,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:33:24,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:33:24,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:33:24,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 144 transitions, 1167 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 12:33:24,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:24,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:33:24,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:25,356 INFO L124 PetriNetUnfolderBase]: 1999/3126 cut-off events. [2024-06-14 12:33:25,356 INFO L125 PetriNetUnfolderBase]: For 78260/78262 co-relation queries the response was YES. [2024-06-14 12:33:25,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17993 conditions, 3126 events. 1999/3126 cut-off events. For 78260/78262 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 15958 event pairs, 643 based on Foata normal form. 1/3124 useless extension candidates. Maximal degree in co-relation 17941. Up to 2973 conditions per place. [2024-06-14 12:33:25,375 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 138 selfloop transitions, 14 changer transitions 0/157 dead transitions. [2024-06-14 12:33:25,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 157 transitions, 1537 flow [2024-06-14 12:33:25,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:33:25,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:33:25,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-14 12:33:25,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3787375415282392 [2024-06-14 12:33:25,376 INFO L175 Difference]: Start difference. First operand has 111 places, 144 transitions, 1167 flow. Second operand 7 states and 114 transitions. [2024-06-14 12:33:25,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 157 transitions, 1537 flow [2024-06-14 12:33:25,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 157 transitions, 1479 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-14 12:33:25,433 INFO L231 Difference]: Finished difference. Result has 114 places, 147 transitions, 1187 flow [2024-06-14 12:33:25,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1109, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1187, PETRI_PLACES=114, PETRI_TRANSITIONS=147} [2024-06-14 12:33:25,434 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 70 predicate places. [2024-06-14 12:33:25,434 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 147 transitions, 1187 flow [2024-06-14 12:33:25,434 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 12:33:25,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:25,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:25,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 12:33:25,435 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 12:33:25,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:25,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1775338006, now seen corresponding path program 1 times [2024-06-14 12:33:25,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:25,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282420465] [2024-06-14 12:33:25,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:25,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:25,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:26,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:26,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:26,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282420465] [2024-06-14 12:33:26,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282420465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:26,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:26,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:33:26,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705831385] [2024-06-14 12:33:26,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:26,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:33:26,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:26,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:33:26,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:33:26,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:33:26,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 147 transitions, 1187 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:26,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:26,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:33:26,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:27,029 INFO L124 PetriNetUnfolderBase]: 2216/3449 cut-off events. [2024-06-14 12:33:27,029 INFO L125 PetriNetUnfolderBase]: For 107996/108001 co-relation queries the response was YES. [2024-06-14 12:33:27,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20975 conditions, 3449 events. 2216/3449 cut-off events. For 107996/108001 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 17790 event pairs, 437 based on Foata normal form. 16/3461 useless extension candidates. Maximal degree in co-relation 20922. Up to 2141 conditions per place. [2024-06-14 12:33:27,051 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 114 selfloop transitions, 68 changer transitions 0/188 dead transitions. [2024-06-14 12:33:27,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 188 transitions, 1813 flow [2024-06-14 12:33:27,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:33:27,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:33:27,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-14 12:33:27,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-14 12:33:27,053 INFO L175 Difference]: Start difference. First operand has 114 places, 147 transitions, 1187 flow. Second operand 8 states and 160 transitions. [2024-06-14 12:33:27,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 188 transitions, 1813 flow [2024-06-14 12:33:27,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 188 transitions, 1757 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-14 12:33:27,110 INFO L231 Difference]: Finished difference. Result has 117 places, 149 transitions, 1323 flow [2024-06-14 12:33:27,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1131, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1323, PETRI_PLACES=117, PETRI_TRANSITIONS=149} [2024-06-14 12:33:27,111 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 73 predicate places. [2024-06-14 12:33:27,111 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 149 transitions, 1323 flow [2024-06-14 12:33:27,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:27,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:27,112 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 12:33:27,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 12:33:27,112 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 12:33:27,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:27,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1863903766, now seen corresponding path program 2 times [2024-06-14 12:33:27,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:27,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4956558] [2024-06-14 12:33:27,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:27,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:27,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:27,928 INFO 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 12:33:27,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:27,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4956558] [2024-06-14 12:33:27,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4956558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:27,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:27,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:33:27,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738545574] [2024-06-14 12:33:27,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:27,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:33:27,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:27,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:33:27,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:33:28,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:33:28,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 149 transitions, 1323 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:28,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:28,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:33:28,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:28,729 INFO L124 PetriNetUnfolderBase]: 2274/3550 cut-off events. [2024-06-14 12:33:28,729 INFO L125 PetriNetUnfolderBase]: For 116587/116592 co-relation queries the response was YES. [2024-06-14 12:33:28,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22013 conditions, 3550 events. 2274/3550 cut-off events. For 116587/116592 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 18562 event pairs, 619 based on Foata normal form. 16/3562 useless extension candidates. Maximal degree in co-relation 21959. Up to 2648 conditions per place. [2024-06-14 12:33:28,756 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 111 selfloop transitions, 71 changer transitions 0/188 dead transitions. [2024-06-14 12:33:28,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 188 transitions, 1831 flow [2024-06-14 12:33:28,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:33:28,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:33:28,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-14 12:33:28,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-14 12:33:28,758 INFO L175 Difference]: Start difference. First operand has 117 places, 149 transitions, 1323 flow. Second operand 8 states and 160 transitions. [2024-06-14 12:33:28,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 188 transitions, 1831 flow [2024-06-14 12:33:28,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 188 transitions, 1748 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-14 12:33:28,821 INFO L231 Difference]: Finished difference. Result has 121 places, 150 transitions, 1416 flow [2024-06-14 12:33:28,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1240, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1416, PETRI_PLACES=121, PETRI_TRANSITIONS=150} [2024-06-14 12:33:28,822 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 77 predicate places. [2024-06-14 12:33:28,822 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 150 transitions, 1416 flow [2024-06-14 12:33:28,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:28,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:28,822 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 12:33:28,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 12:33:28,823 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:33:28,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:28,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1016221669, now seen corresponding path program 1 times [2024-06-14 12:33:28,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:28,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108406462] [2024-06-14 12:33:28,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:28,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:28,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:29,579 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 12:33:29,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:29,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108406462] [2024-06-14 12:33:29,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108406462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:29,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:29,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:33:29,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551372487] [2024-06-14 12:33:29,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:29,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:33:29,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:29,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:33:29,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:33:29,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:33:29,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 150 transitions, 1416 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 12:33:29,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:29,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:33:29,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:30,242 INFO L124 PetriNetUnfolderBase]: 2284/3573 cut-off events. [2024-06-14 12:33:30,242 INFO L125 PetriNetUnfolderBase]: For 119578/119587 co-relation queries the response was YES. [2024-06-14 12:33:30,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22653 conditions, 3573 events. 2284/3573 cut-off events. For 119578/119587 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 18677 event pairs, 698 based on Foata normal form. 10/3579 useless extension candidates. Maximal degree in co-relation 22597. Up to 3248 conditions per place. [2024-06-14 12:33:30,263 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 136 selfloop transitions, 35 changer transitions 0/177 dead transitions. [2024-06-14 12:33:30,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 177 transitions, 1886 flow [2024-06-14 12:33:30,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:33:30,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:33:30,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-14 12:33:30,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-14 12:33:30,265 INFO L175 Difference]: Start difference. First operand has 121 places, 150 transitions, 1416 flow. Second operand 7 states and 131 transitions. [2024-06-14 12:33:30,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 177 transitions, 1886 flow [2024-06-14 12:33:30,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 177 transitions, 1728 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-14 12:33:30,327 INFO L231 Difference]: Finished difference. Result has 122 places, 154 transitions, 1394 flow [2024-06-14 12:33:30,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1258, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1394, PETRI_PLACES=122, PETRI_TRANSITIONS=154} [2024-06-14 12:33:30,327 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 78 predicate places. [2024-06-14 12:33:30,327 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 154 transitions, 1394 flow [2024-06-14 12:33:30,328 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 12:33:30,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:30,328 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 12:33:30,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 12:33:30,328 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 12:33:30,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:30,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1026075820, now seen corresponding path program 3 times [2024-06-14 12:33:30,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:30,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378850111] [2024-06-14 12:33:30,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:30,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:30,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:31,141 INFO 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 12:33:31,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:31,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378850111] [2024-06-14 12:33:31,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378850111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:31,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:31,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:33:31,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816800938] [2024-06-14 12:33:31,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:31,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:33:31,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:31,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:33:31,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:33:31,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:33:31,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 154 transitions, 1394 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:31,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:31,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:33:31,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:31,925 INFO L124 PetriNetUnfolderBase]: 2403/3788 cut-off events. [2024-06-14 12:33:31,925 INFO L125 PetriNetUnfolderBase]: For 137102/137111 co-relation queries the response was YES. [2024-06-14 12:33:31,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24201 conditions, 3788 events. 2403/3788 cut-off events. For 137102/137111 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 20296 event pairs, 513 based on Foata normal form. 22/3806 useless extension candidates. Maximal degree in co-relation 24144. Up to 2765 conditions per place. [2024-06-14 12:33:31,954 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 120 selfloop transitions, 73 changer transitions 0/199 dead transitions. [2024-06-14 12:33:31,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 199 transitions, 2080 flow [2024-06-14 12:33:31,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:33:31,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:33:31,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-14 12:33:31,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796511627906977 [2024-06-14 12:33:31,963 INFO L175 Difference]: Start difference. First operand has 122 places, 154 transitions, 1394 flow. Second operand 8 states and 165 transitions. [2024-06-14 12:33:31,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 199 transitions, 2080 flow [2024-06-14 12:33:32,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 199 transitions, 1974 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 12:33:32,044 INFO L231 Difference]: Finished difference. Result has 125 places, 156 transitions, 1498 flow [2024-06-14 12:33:32,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1288, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1498, PETRI_PLACES=125, PETRI_TRANSITIONS=156} [2024-06-14 12:33:32,045 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 81 predicate places. [2024-06-14 12:33:32,045 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 156 transitions, 1498 flow [2024-06-14 12:33:32,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:32,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:32,045 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 12:33:32,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 12:33:32,045 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 12:33:32,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:32,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1143110610, now seen corresponding path program 4 times [2024-06-14 12:33:32,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:32,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505576748] [2024-06-14 12:33:32,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:32,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:32,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:32,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:32,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:32,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505576748] [2024-06-14 12:33:32,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505576748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:32,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:32,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:33:32,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866043879] [2024-06-14 12:33:32,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:32,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:33:32,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:32,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:33:32,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:33:32,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:33:32,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 156 transitions, 1498 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:32,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:32,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:33:32,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:33,772 INFO L124 PetriNetUnfolderBase]: 2478/3913 cut-off events. [2024-06-14 12:33:33,773 INFO L125 PetriNetUnfolderBase]: For 149755/149764 co-relation queries the response was YES. [2024-06-14 12:33:33,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25352 conditions, 3913 events. 2478/3913 cut-off events. For 149755/149764 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 21266 event pairs, 682 based on Foata normal form. 26/3935 useless extension candidates. Maximal degree in co-relation 25294. Up to 3141 conditions per place. [2024-06-14 12:33:33,803 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 120 selfloop transitions, 70 changer transitions 0/196 dead transitions. [2024-06-14 12:33:33,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 196 transitions, 2036 flow [2024-06-14 12:33:33,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:33:33,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:33:33,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-14 12:33:33,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-14 12:33:33,805 INFO L175 Difference]: Start difference. First operand has 125 places, 156 transitions, 1498 flow. Second operand 8 states and 160 transitions. [2024-06-14 12:33:33,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 196 transitions, 2036 flow [2024-06-14 12:33:33,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 196 transitions, 1930 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 12:33:33,911 INFO L231 Difference]: Finished difference. Result has 129 places, 157 transitions, 1573 flow [2024-06-14 12:33:33,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1394, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1573, PETRI_PLACES=129, PETRI_TRANSITIONS=157} [2024-06-14 12:33:33,911 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 85 predicate places. [2024-06-14 12:33:33,911 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 157 transitions, 1573 flow [2024-06-14 12:33:33,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:33,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:33,912 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 12:33:33,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 12:33:33,912 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 12:33:33,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:33,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1148472990, now seen corresponding path program 5 times [2024-06-14 12:33:33,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:33,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021680500] [2024-06-14 12:33:33,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:33,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:33,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:34,802 INFO 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 12:33:34,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:34,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021680500] [2024-06-14 12:33:34,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021680500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:34,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:34,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:33:34,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228601768] [2024-06-14 12:33:34,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:34,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:33:34,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:34,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:33:34,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:33:34,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:33:34,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 157 transitions, 1573 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:34,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:34,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:33:34,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:35,651 INFO L124 PetriNetUnfolderBase]: 2553/4032 cut-off events. [2024-06-14 12:33:35,652 INFO L125 PetriNetUnfolderBase]: For 158583/158588 co-relation queries the response was YES. [2024-06-14 12:33:35,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26370 conditions, 4032 events. 2553/4032 cut-off events. For 158583/158588 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 22108 event pairs, 678 based on Foata normal form. 20/4048 useless extension candidates. Maximal degree in co-relation 26310. Up to 3266 conditions per place. [2024-06-14 12:33:35,690 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 122 selfloop transitions, 66 changer transitions 0/194 dead transitions. [2024-06-14 12:33:35,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 194 transitions, 2095 flow [2024-06-14 12:33:35,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:33:35,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:33:35,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-14 12:33:35,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-14 12:33:35,692 INFO L175 Difference]: Start difference. First operand has 129 places, 157 transitions, 1573 flow. Second operand 8 states and 156 transitions. [2024-06-14 12:33:35,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 194 transitions, 2095 flow [2024-06-14 12:33:35,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 194 transitions, 1944 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 12:33:35,801 INFO L231 Difference]: Finished difference. Result has 131 places, 158 transitions, 1595 flow [2024-06-14 12:33:35,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1422, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1595, PETRI_PLACES=131, PETRI_TRANSITIONS=158} [2024-06-14 12:33:35,802 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 87 predicate places. [2024-06-14 12:33:35,802 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 158 transitions, 1595 flow [2024-06-14 12:33:35,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:35,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:35,802 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 12:33:35,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 12:33:35,802 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 12:33:35,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:35,803 INFO L85 PathProgramCache]: Analyzing trace with hash 235668030, now seen corresponding path program 1 times [2024-06-14 12:33:35,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:35,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464110237] [2024-06-14 12:33:35,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:35,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:35,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:37,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:37,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:37,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464110237] [2024-06-14 12:33:37,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464110237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:37,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:37,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:33:37,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274803637] [2024-06-14 12:33:37,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:37,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:33:37,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:37,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:33:37,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:33:37,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:33:37,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 158 transitions, 1595 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:37,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:37,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:33:37,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:38,013 INFO L124 PetriNetUnfolderBase]: 2594/4113 cut-off events. [2024-06-14 12:33:38,013 INFO L125 PetriNetUnfolderBase]: For 163904/163909 co-relation queries the response was YES. [2024-06-14 12:33:38,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26880 conditions, 4113 events. 2594/4113 cut-off events. For 163904/163909 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 22831 event pairs, 684 based on Foata normal form. 12/4121 useless extension candidates. Maximal degree in co-relation 26819. Up to 2932 conditions per place. [2024-06-14 12:33:38,052 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 121 selfloop transitions, 69 changer transitions 0/196 dead transitions. [2024-06-14 12:33:38,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 196 transitions, 2125 flow [2024-06-14 12:33:38,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:33:38,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:33:38,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-14 12:33:38,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-14 12:33:38,054 INFO L175 Difference]: Start difference. First operand has 131 places, 158 transitions, 1595 flow. Second operand 8 states and 157 transitions. [2024-06-14 12:33:38,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 196 transitions, 2125 flow [2024-06-14 12:33:38,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 196 transitions, 1980 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-14 12:33:38,164 INFO L231 Difference]: Finished difference. Result has 133 places, 159 transitions, 1627 flow [2024-06-14 12:33:38,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1450, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1627, PETRI_PLACES=133, PETRI_TRANSITIONS=159} [2024-06-14 12:33:38,164 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 89 predicate places. [2024-06-14 12:33:38,164 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 159 transitions, 1627 flow [2024-06-14 12:33:38,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:38,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:38,165 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 12:33:38,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 12:33:38,165 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:33:38,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:38,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1358510029, now seen corresponding path program 2 times [2024-06-14 12:33:38,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:38,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695341920] [2024-06-14 12:33:38,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:38,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:38,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:39,021 INFO 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 12:33:39,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:39,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695341920] [2024-06-14 12:33:39,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695341920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:39,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:39,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:33:39,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244232926] [2024-06-14 12:33:39,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:39,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:33:39,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:39,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:33:39,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:33:39,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:33:39,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 159 transitions, 1627 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 12:33:39,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:39,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:33:39,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:39,658 INFO L124 PetriNetUnfolderBase]: 2622/4155 cut-off events. [2024-06-14 12:33:39,658 INFO L125 PetriNetUnfolderBase]: For 167852/167857 co-relation queries the response was YES. [2024-06-14 12:33:39,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27383 conditions, 4155 events. 2622/4155 cut-off events. For 167852/167857 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 23161 event pairs, 811 based on Foata normal form. 4/4155 useless extension candidates. Maximal degree in co-relation 27321. Up to 3771 conditions per place. [2024-06-14 12:33:39,691 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 140 selfloop transitions, 38 changer transitions 0/184 dead transitions. [2024-06-14 12:33:39,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 184 transitions, 2215 flow [2024-06-14 12:33:39,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:33:39,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:33:39,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-14 12:33:39,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219269102990033 [2024-06-14 12:33:39,692 INFO L175 Difference]: Start difference. First operand has 133 places, 159 transitions, 1627 flow. Second operand 7 states and 127 transitions. [2024-06-14 12:33:39,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 184 transitions, 2215 flow [2024-06-14 12:33:39,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 184 transitions, 2058 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 12:33:39,813 INFO L231 Difference]: Finished difference. Result has 135 places, 167 transitions, 1693 flow [2024-06-14 12:33:39,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1470, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1693, PETRI_PLACES=135, PETRI_TRANSITIONS=167} [2024-06-14 12:33:39,813 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 91 predicate places. [2024-06-14 12:33:39,814 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 167 transitions, 1693 flow [2024-06-14 12:33:39,814 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 12:33:39,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:39,814 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 12:33:39,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 12:33:39,814 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 12:33:39,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:39,815 INFO L85 PathProgramCache]: Analyzing trace with hash -408579181, now seen corresponding path program 1 times [2024-06-14 12:33:39,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:39,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577901087] [2024-06-14 12:33:39,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:39,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:39,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:40,581 INFO 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 12:33:40,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:40,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577901087] [2024-06-14 12:33:40,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577901087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:40,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:40,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:33:40,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624698357] [2024-06-14 12:33:40,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:40,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:33:40,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:40,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:33:40,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:33:40,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:33:40,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 167 transitions, 1693 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:40,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:40,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:33:40,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:41,262 INFO L124 PetriNetUnfolderBase]: 2733/4276 cut-off events. [2024-06-14 12:33:41,263 INFO L125 PetriNetUnfolderBase]: For 176406/176412 co-relation queries the response was YES. [2024-06-14 12:33:41,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28432 conditions, 4276 events. 2733/4276 cut-off events. For 176406/176412 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 23442 event pairs, 861 based on Foata normal form. 7/4280 useless extension candidates. Maximal degree in co-relation 28368. Up to 4128 conditions per place. [2024-06-14 12:33:41,296 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 167 selfloop transitions, 16 changer transitions 0/187 dead transitions. [2024-06-14 12:33:41,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 187 transitions, 2161 flow [2024-06-14 12:33:41,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:33:41,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:33:41,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-14 12:33:41,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3787375415282392 [2024-06-14 12:33:41,297 INFO L175 Difference]: Start difference. First operand has 135 places, 167 transitions, 1693 flow. Second operand 7 states and 114 transitions. [2024-06-14 12:33:41,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 187 transitions, 2161 flow [2024-06-14 12:33:41,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 187 transitions, 2073 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-14 12:33:41,433 INFO L231 Difference]: Finished difference. Result has 139 places, 170 transitions, 1695 flow [2024-06-14 12:33:41,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1605, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1695, PETRI_PLACES=139, PETRI_TRANSITIONS=170} [2024-06-14 12:33:41,434 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 95 predicate places. [2024-06-14 12:33:41,434 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 170 transitions, 1695 flow [2024-06-14 12:33:41,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:41,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:41,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:41,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 12:33:41,435 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 12:33:41,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:41,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1709852882, now seen corresponding path program 6 times [2024-06-14 12:33:41,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:41,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666851236] [2024-06-14 12:33:41,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:41,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:41,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:42,341 INFO 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 12:33:42,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:42,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666851236] [2024-06-14 12:33:42,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666851236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:42,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:42,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:33:42,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723943010] [2024-06-14 12:33:42,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:42,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:33:42,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:42,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:33:42,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:33:42,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:33:42,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 170 transitions, 1695 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:42,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:42,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:33:42,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:43,394 INFO L124 PetriNetUnfolderBase]: 2603/4122 cut-off events. [2024-06-14 12:33:43,395 INFO L125 PetriNetUnfolderBase]: For 184820/184831 co-relation queries the response was YES. [2024-06-14 12:33:43,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27559 conditions, 4122 events. 2603/4122 cut-off events. For 184820/184831 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 22835 event pairs, 693 based on Foata normal form. 23/4130 useless extension candidates. Maximal degree in co-relation 27493. Up to 3343 conditions per place. [2024-06-14 12:33:43,425 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 132 selfloop transitions, 63 changer transitions 0/202 dead transitions. [2024-06-14 12:33:43,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 202 transitions, 2193 flow [2024-06-14 12:33:43,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:33:43,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:33:43,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 12:33:43,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-14 12:33:43,427 INFO L175 Difference]: Start difference. First operand has 139 places, 170 transitions, 1695 flow. Second operand 8 states and 151 transitions. [2024-06-14 12:33:43,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 202 transitions, 2193 flow [2024-06-14 12:33:43,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 202 transitions, 2113 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-14 12:33:43,581 INFO L231 Difference]: Finished difference. Result has 142 places, 170 transitions, 1750 flow [2024-06-14 12:33:43,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1615, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1750, PETRI_PLACES=142, PETRI_TRANSITIONS=170} [2024-06-14 12:33:43,582 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 98 predicate places. [2024-06-14 12:33:43,582 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 170 transitions, 1750 flow [2024-06-14 12:33:43,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:43,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:43,582 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 12:33:43,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 12:33:43,583 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 12:33:43,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:43,583 INFO L85 PathProgramCache]: Analyzing trace with hash -43305276, now seen corresponding path program 2 times [2024-06-14 12:33:43,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:43,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261043440] [2024-06-14 12:33:43,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:43,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:43,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:44,802 INFO 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 12:33:44,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:44,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261043440] [2024-06-14 12:33:44,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261043440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:44,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:44,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:33:44,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492566609] [2024-06-14 12:33:44,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:44,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:33:44,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:44,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:33:44,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:33:44,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:33:44,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 170 transitions, 1750 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:44,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:44,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:33:44,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:45,673 INFO L124 PetriNetUnfolderBase]: 2583/4086 cut-off events. [2024-06-14 12:33:45,673 INFO L125 PetriNetUnfolderBase]: For 182101/182112 co-relation queries the response was YES. [2024-06-14 12:33:45,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27416 conditions, 4086 events. 2583/4086 cut-off events. For 182101/182112 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 22558 event pairs, 670 based on Foata normal form. 15/4086 useless extension candidates. Maximal degree in co-relation 27349. Up to 3221 conditions per place. [2024-06-14 12:33:45,703 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 132 selfloop transitions, 65 changer transitions 0/204 dead transitions. [2024-06-14 12:33:45,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 204 transitions, 2262 flow [2024-06-14 12:33:45,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:33:45,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:33:45,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 12:33:45,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-14 12:33:45,705 INFO L175 Difference]: Start difference. First operand has 142 places, 170 transitions, 1750 flow. Second operand 8 states and 153 transitions. [2024-06-14 12:33:45,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 204 transitions, 2262 flow [2024-06-14 12:33:45,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 204 transitions, 2107 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-14 12:33:45,847 INFO L231 Difference]: Finished difference. Result has 143 places, 170 transitions, 1731 flow [2024-06-14 12:33:45,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1595, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1731, PETRI_PLACES=143, PETRI_TRANSITIONS=170} [2024-06-14 12:33:45,847 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 99 predicate places. [2024-06-14 12:33:45,848 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 170 transitions, 1731 flow [2024-06-14 12:33:45,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:45,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:45,848 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 12:33:45,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 12:33:45,848 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 12:33:45,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:45,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1663696168, now seen corresponding path program 3 times [2024-06-14 12:33:45,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:45,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805528055] [2024-06-14 12:33:45,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:45,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:45,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:46,990 INFO 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 12:33:46,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:46,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805528055] [2024-06-14 12:33:46,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805528055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:46,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:46,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:33:46,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671684386] [2024-06-14 12:33:46,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:46,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:33:46,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:46,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:33:46,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:33:47,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:33:47,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 170 transitions, 1731 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:47,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:47,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:33:47,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:47,868 INFO L124 PetriNetUnfolderBase]: 2563/4054 cut-off events. [2024-06-14 12:33:47,869 INFO L125 PetriNetUnfolderBase]: For 182398/182409 co-relation queries the response was YES. [2024-06-14 12:33:47,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26897 conditions, 4054 events. 2563/4054 cut-off events. For 182398/182409 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 22334 event pairs, 610 based on Foata normal form. 15/4054 useless extension candidates. Maximal degree in co-relation 26829. Up to 2539 conditions per place. [2024-06-14 12:33:47,915 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 123 selfloop transitions, 73 changer transitions 0/203 dead transitions. [2024-06-14 12:33:47,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 203 transitions, 2179 flow [2024-06-14 12:33:47,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:33:47,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:33:47,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 12:33:47,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-14 12:33:47,919 INFO L175 Difference]: Start difference. First operand has 143 places, 170 transitions, 1731 flow. Second operand 8 states and 151 transitions. [2024-06-14 12:33:47,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 203 transitions, 2179 flow [2024-06-14 12:33:48,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 203 transitions, 1947 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-14 12:33:48,087 INFO L231 Difference]: Finished difference. Result has 142 places, 169 transitions, 1589 flow [2024-06-14 12:33:48,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1439, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1589, PETRI_PLACES=142, PETRI_TRANSITIONS=169} [2024-06-14 12:33:48,088 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 98 predicate places. [2024-06-14 12:33:48,088 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 169 transitions, 1589 flow [2024-06-14 12:33:48,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:48,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:48,088 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 12:33:48,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 12:33:48,089 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:33:48,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:48,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1004246617, now seen corresponding path program 2 times [2024-06-14 12:33:48,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:48,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649917030] [2024-06-14 12:33:48,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:48,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:48,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:48,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:48,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:48,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649917030] [2024-06-14 12:33:48,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649917030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:48,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:48,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:33:48,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185665879] [2024-06-14 12:33:48,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:48,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:33:48,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:48,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:33:48,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:33:49,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:33:49,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 169 transitions, 1589 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:49,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:49,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:33:49,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:49,634 INFO L124 PetriNetUnfolderBase]: 2662/4168 cut-off events. [2024-06-14 12:33:49,635 INFO L125 PetriNetUnfolderBase]: For 182510/182528 co-relation queries the response was YES. [2024-06-14 12:33:49,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27138 conditions, 4168 events. 2662/4168 cut-off events. For 182510/182528 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 22646 event pairs, 801 based on Foata normal form. 13/4174 useless extension candidates. Maximal degree in co-relation 27070. Up to 3999 conditions per place. [2024-06-14 12:33:49,669 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 156 selfloop transitions, 28 changer transitions 0/188 dead transitions. [2024-06-14 12:33:49,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 188 transitions, 2183 flow [2024-06-14 12:33:49,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:33:49,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:33:49,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-14 12:33:49,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-14 12:33:49,670 INFO L175 Difference]: Start difference. First operand has 142 places, 169 transitions, 1589 flow. Second operand 7 states and 112 transitions. [2024-06-14 12:33:49,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 188 transitions, 2183 flow [2024-06-14 12:33:49,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 188 transitions, 1978 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-14 12:33:49,802 INFO L231 Difference]: Finished difference. Result has 142 places, 175 transitions, 1556 flow [2024-06-14 12:33:49,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1384, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1556, PETRI_PLACES=142, PETRI_TRANSITIONS=175} [2024-06-14 12:33:49,802 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 98 predicate places. [2024-06-14 12:33:49,802 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 175 transitions, 1556 flow [2024-06-14 12:33:49,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:49,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:49,803 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 12:33:49,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 12:33:49,803 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:33:49,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:49,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1004246989, now seen corresponding path program 3 times [2024-06-14 12:33:49,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:49,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134148788] [2024-06-14 12:33:49,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:49,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:49,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:50,687 INFO 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 12:33:50,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:50,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134148788] [2024-06-14 12:33:50,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134148788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:50,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:50,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:33:50,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324286411] [2024-06-14 12:33:50,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:50,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:33:50,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:50,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:33:50,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:33:50,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:33:50,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 175 transitions, 1556 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 12:33:50,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:50,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:33:50,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:51,293 INFO L124 PetriNetUnfolderBase]: 2572/4068 cut-off events. [2024-06-14 12:33:51,293 INFO L125 PetriNetUnfolderBase]: For 190998/191009 co-relation queries the response was YES. [2024-06-14 12:33:51,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26393 conditions, 4068 events. 2572/4068 cut-off events. For 190998/191009 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 22411 event pairs, 781 based on Foata normal form. 5/4058 useless extension candidates. Maximal degree in co-relation 26325. Up to 3648 conditions per place. [2024-06-14 12:33:51,327 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 136 selfloop transitions, 51 changer transitions 0/196 dead transitions. [2024-06-14 12:33:51,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 196 transitions, 2266 flow [2024-06-14 12:33:51,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:33:51,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:33:51,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-14 12:33:51,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119601328903654 [2024-06-14 12:33:51,328 INFO L175 Difference]: Start difference. First operand has 142 places, 175 transitions, 1556 flow. Second operand 7 states and 124 transitions. [2024-06-14 12:33:51,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 196 transitions, 2266 flow [2024-06-14 12:33:51,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 196 transitions, 2193 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-14 12:33:51,452 INFO L231 Difference]: Finished difference. Result has 147 places, 183 transitions, 1747 flow [2024-06-14 12:33:51,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1483, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1747, PETRI_PLACES=147, PETRI_TRANSITIONS=183} [2024-06-14 12:33:51,452 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 103 predicate places. [2024-06-14 12:33:51,452 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 183 transitions, 1747 flow [2024-06-14 12:33:51,453 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 12:33:51,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:51,453 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 12:33:51,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 12:33:51,453 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:33:51,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:51,454 INFO L85 PathProgramCache]: Analyzing trace with hash -148524253, now seen corresponding path program 3 times [2024-06-14 12:33:51,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:51,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336136169] [2024-06-14 12:33:51,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:51,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:51,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:52,299 INFO 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 12:33:52,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:52,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336136169] [2024-06-14 12:33:52,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336136169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:52,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:52,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:33:52,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441298648] [2024-06-14 12:33:52,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:52,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:33:52,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:52,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:33:52,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:33:52,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:33:52,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 183 transitions, 1747 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:52,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:52,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:33:52,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:53,141 INFO L124 PetriNetUnfolderBase]: 2663/4171 cut-off events. [2024-06-14 12:33:53,141 INFO L125 PetriNetUnfolderBase]: For 200771/200789 co-relation queries the response was YES. [2024-06-14 12:33:53,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27708 conditions, 4171 events. 2663/4171 cut-off events. For 200771/200789 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 22649 event pairs, 800 based on Foata normal form. 13/4177 useless extension candidates. Maximal degree in co-relation 27637. Up to 4002 conditions per place. [2024-06-14 12:33:53,193 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 162 selfloop transitions, 29 changer transitions 0/195 dead transitions. [2024-06-14 12:33:53,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 195 transitions, 2169 flow [2024-06-14 12:33:53,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:33:53,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:33:53,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-14 12:33:53,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3654485049833887 [2024-06-14 12:33:53,195 INFO L175 Difference]: Start difference. First operand has 147 places, 183 transitions, 1747 flow. Second operand 7 states and 110 transitions. [2024-06-14 12:33:53,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 195 transitions, 2169 flow [2024-06-14 12:33:53,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 195 transitions, 1969 flow, removed 62 selfloop flow, removed 4 redundant places. [2024-06-14 12:33:53,403 INFO L231 Difference]: Finished difference. Result has 150 places, 183 transitions, 1611 flow [2024-06-14 12:33:53,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1547, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1611, PETRI_PLACES=150, PETRI_TRANSITIONS=183} [2024-06-14 12:33:53,403 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 106 predicate places. [2024-06-14 12:33:53,404 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 183 transitions, 1611 flow [2024-06-14 12:33:53,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:53,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:53,404 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 12:33:53,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 12:33:53,405 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:33:53,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:53,405 INFO L85 PathProgramCache]: Analyzing trace with hash -155189377, now seen corresponding path program 1 times [2024-06-14 12:33:53,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:53,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602470987] [2024-06-14 12:33:53,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:53,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:53,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:54,300 INFO 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 12:33:54,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:54,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602470987] [2024-06-14 12:33:54,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602470987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:54,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:54,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:33:54,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541877841] [2024-06-14 12:33:54,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:54,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:33:54,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:54,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:33:54,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:33:54,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:33:54,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 183 transitions, 1611 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:54,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:54,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:33:54,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:54,979 INFO L124 PetriNetUnfolderBase]: 2375/3840 cut-off events. [2024-06-14 12:33:54,980 INFO L125 PetriNetUnfolderBase]: For 178100/178102 co-relation queries the response was YES. [2024-06-14 12:33:55,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24470 conditions, 3840 events. 2375/3840 cut-off events. For 178100/178102 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 21647 event pairs, 677 based on Foata normal form. 2/3839 useless extension candidates. Maximal degree in co-relation 24398. Up to 3547 conditions per place. [2024-06-14 12:33:55,021 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 179 selfloop transitions, 17 changer transitions 0/206 dead transitions. [2024-06-14 12:33:55,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 206 transitions, 2111 flow [2024-06-14 12:33:55,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:33:55,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:33:55,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-14 12:33:55,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219269102990033 [2024-06-14 12:33:55,025 INFO L175 Difference]: Start difference. First operand has 150 places, 183 transitions, 1611 flow. Second operand 7 states and 127 transitions. [2024-06-14 12:33:55,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 206 transitions, 2111 flow [2024-06-14 12:33:55,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 206 transitions, 2045 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 12:33:55,216 INFO L231 Difference]: Finished difference. Result has 152 places, 189 transitions, 1655 flow [2024-06-14 12:33:55,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1545, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1655, PETRI_PLACES=152, PETRI_TRANSITIONS=189} [2024-06-14 12:33:55,217 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 108 predicate places. [2024-06-14 12:33:55,217 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 189 transitions, 1655 flow [2024-06-14 12:33:55,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:55,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:55,218 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 12:33:55,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 12:33:55,218 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:33:55,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:55,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1181193811, now seen corresponding path program 2 times [2024-06-14 12:33:55,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:55,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110796208] [2024-06-14 12:33:55,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:55,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:55,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:56,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:56,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:56,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110796208] [2024-06-14 12:33:56,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110796208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:56,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:56,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:33:56,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891736796] [2024-06-14 12:33:56,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:56,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:33:56,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:56,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:33:56,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:33:56,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:33:56,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 189 transitions, 1655 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:56,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:56,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:33:56,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:56,780 INFO L124 PetriNetUnfolderBase]: 2393/3865 cut-off events. [2024-06-14 12:33:56,781 INFO L125 PetriNetUnfolderBase]: For 187631/187633 co-relation queries the response was YES. [2024-06-14 12:33:56,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25426 conditions, 3865 events. 2393/3865 cut-off events. For 187631/187633 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 21779 event pairs, 677 based on Foata normal form. 2/3864 useless extension candidates. Maximal degree in co-relation 25352. Up to 3559 conditions per place. [2024-06-14 12:33:56,816 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 177 selfloop transitions, 24 changer transitions 0/211 dead transitions. [2024-06-14 12:33:56,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 211 transitions, 2289 flow [2024-06-14 12:33:56,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:33:56,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:33:56,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-14 12:33:56,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42524916943521596 [2024-06-14 12:33:56,817 INFO L175 Difference]: Start difference. First operand has 152 places, 189 transitions, 1655 flow. Second operand 7 states and 128 transitions. [2024-06-14 12:33:56,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 211 transitions, 2289 flow [2024-06-14 12:33:57,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 211 transitions, 2235 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-14 12:33:57,024 INFO L231 Difference]: Finished difference. Result has 156 places, 195 transitions, 1757 flow [2024-06-14 12:33:57,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1601, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1757, PETRI_PLACES=156, PETRI_TRANSITIONS=195} [2024-06-14 12:33:57,025 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 112 predicate places. [2024-06-14 12:33:57,025 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 195 transitions, 1757 flow [2024-06-14 12:33:57,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:57,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:57,025 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 12:33:57,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 12:33:57,026 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:33:57,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:57,026 INFO L85 PathProgramCache]: Analyzing trace with hash 686190147, now seen corresponding path program 1 times [2024-06-14 12:33:57,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:57,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834136063] [2024-06-14 12:33:57,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:57,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:57,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:57,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:57,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:57,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834136063] [2024-06-14 12:33:57,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834136063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:57,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:57,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:33:57,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63523816] [2024-06-14 12:33:57,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:57,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:33:57,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:57,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:33:57,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:33:57,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:33:57,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 195 transitions, 1757 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 12:33:57,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:57,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:33:57,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:58,552 INFO L124 PetriNetUnfolderBase]: 2492/3966 cut-off events. [2024-06-14 12:33:58,552 INFO L125 PetriNetUnfolderBase]: For 195119/195121 co-relation queries the response was YES. [2024-06-14 12:33:58,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26399 conditions, 3966 events. 2492/3966 cut-off events. For 195119/195121 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 21944 event pairs, 711 based on Foata normal form. 1/3964 useless extension candidates. Maximal degree in co-relation 26324. Up to 3783 conditions per place. [2024-06-14 12:33:58,585 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 192 selfloop transitions, 14 changer transitions 0/211 dead transitions. [2024-06-14 12:33:58,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 211 transitions, 2255 flow [2024-06-14 12:33:58,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:33:58,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:33:58,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-14 12:33:58,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3853820598006645 [2024-06-14 12:33:58,586 INFO L175 Difference]: Start difference. First operand has 156 places, 195 transitions, 1757 flow. Second operand 7 states and 116 transitions. [2024-06-14 12:33:58,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 211 transitions, 2255 flow [2024-06-14 12:33:58,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 211 transitions, 2185 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-14 12:33:58,728 INFO L231 Difference]: Finished difference. Result has 159 places, 198 transitions, 1775 flow [2024-06-14 12:33:58,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1689, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1775, PETRI_PLACES=159, PETRI_TRANSITIONS=198} [2024-06-14 12:33:58,728 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 115 predicate places. [2024-06-14 12:33:58,728 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 198 transitions, 1775 flow [2024-06-14 12:33:58,728 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 12:33:58,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:58,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:58,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 12:33:58,729 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:33:58,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:58,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1004062291, now seen corresponding path program 3 times [2024-06-14 12:33:58,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:58,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713775026] [2024-06-14 12:33:58,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:58,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:58,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:59,534 INFO 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 12:33:59,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:59,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713775026] [2024-06-14 12:33:59,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713775026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:59,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:59,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:33:59,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876081293] [2024-06-14 12:33:59,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:59,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:33:59,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:59,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:33:59,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:33:59,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:33:59,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 198 transitions, 1775 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:59,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:59,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:33:59,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:00,209 INFO L124 PetriNetUnfolderBase]: 2379/3874 cut-off events. [2024-06-14 12:34:00,209 INFO L125 PetriNetUnfolderBase]: For 203722/203730 co-relation queries the response was YES. [2024-06-14 12:34:00,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26101 conditions, 3874 events. 2379/3874 cut-off events. For 203722/203730 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 22048 event pairs, 670 based on Foata normal form. 3/3873 useless extension candidates. Maximal degree in co-relation 26025. Up to 3531 conditions per place. [2024-06-14 12:34:00,241 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 172 selfloop transitions, 31 changer transitions 0/214 dead transitions. [2024-06-14 12:34:00,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 214 transitions, 2365 flow [2024-06-14 12:34:00,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:34:00,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:34:00,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-14 12:34:00,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219269102990033 [2024-06-14 12:34:00,243 INFO L175 Difference]: Start difference. First operand has 159 places, 198 transitions, 1775 flow. Second operand 7 states and 127 transitions. [2024-06-14 12:34:00,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 214 transitions, 2365 flow [2024-06-14 12:34:00,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 214 transitions, 2301 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-14 12:34:00,455 INFO L231 Difference]: Finished difference. Result has 161 places, 201 transitions, 1839 flow [2024-06-14 12:34:00,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1711, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1839, PETRI_PLACES=161, PETRI_TRANSITIONS=201} [2024-06-14 12:34:00,456 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 117 predicate places. [2024-06-14 12:34:00,456 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 201 transitions, 1839 flow [2024-06-14 12:34:00,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:00,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:00,456 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 12:34:00,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 12:34:00,457 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 12:34:00,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:00,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1004062105, now seen corresponding path program 2 times [2024-06-14 12:34:00,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:00,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232227934] [2024-06-14 12:34:00,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:00,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:00,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:01,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:34:01,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:01,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232227934] [2024-06-14 12:34:01,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232227934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:01,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:01,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:34:01,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837106862] [2024-06-14 12:34:01,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:01,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:34:01,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:01,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:34:01,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:34:01,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:34:01,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 201 transitions, 1839 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 12:34:01,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:01,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:34:01,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:02,118 INFO L124 PetriNetUnfolderBase]: 2491/3965 cut-off events. [2024-06-14 12:34:02,118 INFO L125 PetriNetUnfolderBase]: For 207225/207233 co-relation queries the response was YES. [2024-06-14 12:34:02,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27094 conditions, 3965 events. 2491/3965 cut-off events. For 207225/207233 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 21973 event pairs, 735 based on Foata normal form. 5/3966 useless extension candidates. Maximal degree in co-relation 27017. Up to 3766 conditions per place. [2024-06-14 12:34:02,150 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 187 selfloop transitions, 26 changer transitions 0/218 dead transitions. [2024-06-14 12:34:02,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 218 transitions, 2497 flow [2024-06-14 12:34:02,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:34:02,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:34:02,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-14 12:34:02,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3920265780730897 [2024-06-14 12:34:02,151 INFO L175 Difference]: Start difference. First operand has 161 places, 201 transitions, 1839 flow. Second operand 7 states and 118 transitions. [2024-06-14 12:34:02,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 218 transitions, 2497 flow [2024-06-14 12:34:02,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 218 transitions, 2391 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-14 12:34:02,421 INFO L231 Difference]: Finished difference. Result has 163 places, 207 transitions, 1905 flow [2024-06-14 12:34:02,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1733, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1905, PETRI_PLACES=163, PETRI_TRANSITIONS=207} [2024-06-14 12:34:02,421 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 119 predicate places. [2024-06-14 12:34:02,421 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 207 transitions, 1905 flow [2024-06-14 12:34:02,422 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 12:34:02,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:02,422 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 12:34:02,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 12:34:02,422 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 12:34:02,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:02,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1549712817, now seen corresponding path program 3 times [2024-06-14 12:34:02,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:02,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450848538] [2024-06-14 12:34:02,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:02,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:02,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:03,195 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 12:34:03,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:03,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450848538] [2024-06-14 12:34:03,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450848538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:03,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:03,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:34:03,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898921953] [2024-06-14 12:34:03,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:03,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:34:03,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:03,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:34:03,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:34:03,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:34:03,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 207 transitions, 1905 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 12:34:03,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:03,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:34:03,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:03,790 INFO L124 PetriNetUnfolderBase]: 2488/3962 cut-off events. [2024-06-14 12:34:03,791 INFO L125 PetriNetUnfolderBase]: For 215040/215048 co-relation queries the response was YES. [2024-06-14 12:34:03,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27325 conditions, 3962 events. 2488/3962 cut-off events. For 215040/215048 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 21894 event pairs, 714 based on Foata normal form. 5/3963 useless extension candidates. Maximal degree in co-relation 27247. Up to 3763 conditions per place. [2024-06-14 12:34:03,826 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 185 selfloop transitions, 27 changer transitions 0/217 dead transitions. [2024-06-14 12:34:03,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 217 transitions, 2357 flow [2024-06-14 12:34:03,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:34:03,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:34:03,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-14 12:34:03,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3853820598006645 [2024-06-14 12:34:03,827 INFO L175 Difference]: Start difference. First operand has 163 places, 207 transitions, 1905 flow. Second operand 7 states and 116 transitions. [2024-06-14 12:34:03,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 217 transitions, 2357 flow [2024-06-14 12:34:04,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 217 transitions, 2247 flow, removed 45 selfloop flow, removed 3 redundant places. [2024-06-14 12:34:04,149 INFO L231 Difference]: Finished difference. Result has 167 places, 207 transitions, 1855 flow [2024-06-14 12:34:04,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1795, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1855, PETRI_PLACES=167, PETRI_TRANSITIONS=207} [2024-06-14 12:34:04,150 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 123 predicate places. [2024-06-14 12:34:04,150 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 207 transitions, 1855 flow [2024-06-14 12:34:04,150 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 12:34:04,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:04,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:04,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 12:34:04,151 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 12:34:04,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:04,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1554649619, now seen corresponding path program 1 times [2024-06-14 12:34:04,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:04,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738969624] [2024-06-14 12:34:04,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:04,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:04,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:04,954 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 12:34:04,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:04,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738969624] [2024-06-14 12:34:04,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738969624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:04,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:04,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:34:04,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157293600] [2024-06-14 12:34:04,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:04,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:34:04,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:04,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:34:04,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:34:05,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:34:05,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 207 transitions, 1855 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:05,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:05,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:34:05,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:05,708 INFO L124 PetriNetUnfolderBase]: 2702/4211 cut-off events. [2024-06-14 12:34:05,708 INFO L125 PetriNetUnfolderBase]: For 266065/266077 co-relation queries the response was YES. [2024-06-14 12:34:05,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30395 conditions, 4211 events. 2702/4211 cut-off events. For 266065/266077 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 22860 event pairs, 737 based on Foata normal form. 12/4219 useless extension candidates. Maximal degree in co-relation 30315. Up to 3949 conditions per place. [2024-06-14 12:34:05,744 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 192 selfloop transitions, 39 changer transitions 0/235 dead transitions. [2024-06-14 12:34:05,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 235 transitions, 2469 flow [2024-06-14 12:34:05,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:34:05,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:34:05,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-14 12:34:05,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-14 12:34:05,745 INFO L175 Difference]: Start difference. First operand has 167 places, 207 transitions, 1855 flow. Second operand 8 states and 137 transitions. [2024-06-14 12:34:05,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 235 transitions, 2469 flow [2024-06-14 12:34:06,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 235 transitions, 2405 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 12:34:06,092 INFO L231 Difference]: Finished difference. Result has 169 places, 211 transitions, 1956 flow [2024-06-14 12:34:06,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1791, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1956, PETRI_PLACES=169, PETRI_TRANSITIONS=211} [2024-06-14 12:34:06,093 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 125 predicate places. [2024-06-14 12:34:06,093 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 211 transitions, 1956 flow [2024-06-14 12:34:06,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:06,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:06,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:06,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 12:34:06,094 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 12:34:06,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:06,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1554536252, now seen corresponding path program 1 times [2024-06-14 12:34:06,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:06,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132578993] [2024-06-14 12:34:06,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:06,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:06,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:06,898 INFO 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 12:34:06,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:06,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132578993] [2024-06-14 12:34:06,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132578993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:06,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:06,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:34:06,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045879857] [2024-06-14 12:34:06,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:06,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:34:06,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:06,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:34:06,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:34:06,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:34:06,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 211 transitions, 1956 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 12:34:06,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:06,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:34:06,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:07,621 INFO L124 PetriNetUnfolderBase]: 2640/4148 cut-off events. [2024-06-14 12:34:07,622 INFO L125 PetriNetUnfolderBase]: For 279247/279255 co-relation queries the response was YES. [2024-06-14 12:34:07,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30986 conditions, 4148 events. 2640/4148 cut-off events. For 279247/279255 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 22862 event pairs, 710 based on Foata normal form. 6/4150 useless extension candidates. Maximal degree in co-relation 30905. Up to 3794 conditions per place. [2024-06-14 12:34:07,662 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 187 selfloop transitions, 35 changer transitions 0/235 dead transitions. [2024-06-14 12:34:07,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 235 transitions, 2521 flow [2024-06-14 12:34:07,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:34:07,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:34:07,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-14 12:34:07,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219269102990033 [2024-06-14 12:34:07,664 INFO L175 Difference]: Start difference. First operand has 169 places, 211 transitions, 1956 flow. Second operand 7 states and 127 transitions. [2024-06-14 12:34:07,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 235 transitions, 2521 flow [2024-06-14 12:34:07,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 235 transitions, 2384 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-14 12:34:07,922 INFO L231 Difference]: Finished difference. Result has 170 places, 215 transitions, 1961 flow [2024-06-14 12:34:07,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1819, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1961, PETRI_PLACES=170, PETRI_TRANSITIONS=215} [2024-06-14 12:34:07,923 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 126 predicate places. [2024-06-14 12:34:07,923 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 215 transitions, 1961 flow [2024-06-14 12:34:07,923 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 12:34:07,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:07,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:07,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 12:34:07,924 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:34:07,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:07,924 INFO L85 PathProgramCache]: Analyzing trace with hash 835867352, now seen corresponding path program 2 times [2024-06-14 12:34:07,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:07,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581264203] [2024-06-14 12:34:07,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:07,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:07,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:08,738 INFO 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 12:34:08,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:08,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581264203] [2024-06-14 12:34:08,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581264203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:08,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:08,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:34:08,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008151007] [2024-06-14 12:34:08,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:08,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:34:08,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:08,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:34:08,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:34:08,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:34:08,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 215 transitions, 1961 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 12:34:08,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:08,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:34:08,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:09,467 INFO L124 PetriNetUnfolderBase]: 2642/4150 cut-off events. [2024-06-14 12:34:09,467 INFO L125 PetriNetUnfolderBase]: For 288192/288200 co-relation queries the response was YES. [2024-06-14 12:34:09,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31101 conditions, 4150 events. 2642/4150 cut-off events. For 288192/288200 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 22845 event pairs, 711 based on Foata normal form. 6/4152 useless extension candidates. Maximal degree in co-relation 31019. Up to 3757 conditions per place. [2024-06-14 12:34:09,505 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 178 selfloop transitions, 44 changer transitions 0/235 dead transitions. [2024-06-14 12:34:09,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 235 transitions, 2613 flow [2024-06-14 12:34:09,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:34:09,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:34:09,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-14 12:34:09,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 12:34:09,512 INFO L175 Difference]: Start difference. First operand has 170 places, 215 transitions, 1961 flow. Second operand 7 states and 126 transitions. [2024-06-14 12:34:09,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 235 transitions, 2613 flow [2024-06-14 12:34:09,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 235 transitions, 2516 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-14 12:34:09,756 INFO L231 Difference]: Finished difference. Result has 172 places, 218 transitions, 2017 flow [2024-06-14 12:34:09,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1864, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2017, PETRI_PLACES=172, PETRI_TRANSITIONS=218} [2024-06-14 12:34:09,757 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 128 predicate places. [2024-06-14 12:34:09,757 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 218 transitions, 2017 flow [2024-06-14 12:34:09,758 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 12:34:09,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:09,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:09,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 12:34:09,758 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:34:09,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:09,758 INFO L85 PathProgramCache]: Analyzing trace with hash 835863725, now seen corresponding path program 2 times [2024-06-14 12:34:09,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:09,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887045735] [2024-06-14 12:34:09,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:09,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:09,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:10,713 INFO 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 12:34:10,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:10,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887045735] [2024-06-14 12:34:10,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887045735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:10,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:10,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:34:10,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391007685] [2024-06-14 12:34:10,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:10,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:34:10,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:10,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:34:10,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:34:10,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:34:10,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 218 transitions, 2017 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:10,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:10,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:34:10,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:11,579 INFO L124 PetriNetUnfolderBase]: 2758/4291 cut-off events. [2024-06-14 12:34:11,580 INFO L125 PetriNetUnfolderBase]: For 303302/303310 co-relation queries the response was YES. [2024-06-14 12:34:11,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32331 conditions, 4291 events. 2758/4291 cut-off events. For 303302/303310 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 23358 event pairs, 744 based on Foata normal form. 6/4293 useless extension candidates. Maximal degree in co-relation 32248. Up to 3940 conditions per place. [2024-06-14 12:34:11,625 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 188 selfloop transitions, 57 changer transitions 0/249 dead transitions. [2024-06-14 12:34:11,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 249 transitions, 3003 flow [2024-06-14 12:34:11,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:34:11,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:34:11,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-14 12:34:11,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 12:34:11,627 INFO L175 Difference]: Start difference. First operand has 172 places, 218 transitions, 2017 flow. Second operand 8 states and 136 transitions. [2024-06-14 12:34:11,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 249 transitions, 3003 flow [2024-06-14 12:34:11,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 249 transitions, 2905 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-14 12:34:11,918 INFO L231 Difference]: Finished difference. Result has 177 places, 230 transitions, 2314 flow [2024-06-14 12:34:11,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1919, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2314, PETRI_PLACES=177, PETRI_TRANSITIONS=230} [2024-06-14 12:34:11,919 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 133 predicate places. [2024-06-14 12:34:11,919 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 230 transitions, 2314 flow [2024-06-14 12:34:11,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:11,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:11,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:11,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 12:34:11,920 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:34:11,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:11,920 INFO L85 PathProgramCache]: Analyzing trace with hash 218948569, now seen corresponding path program 3 times [2024-06-14 12:34:11,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:11,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093191748] [2024-06-14 12:34:11,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:11,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:11,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:12,775 INFO 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 12:34:12,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:12,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093191748] [2024-06-14 12:34:12,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093191748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:12,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:12,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:34:12,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272244031] [2024-06-14 12:34:12,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:12,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:34:12,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:12,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:34:12,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:34:12,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:34:12,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 230 transitions, 2314 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:12,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:12,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:34:12,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:13,565 INFO L124 PetriNetUnfolderBase]: 2754/4287 cut-off events. [2024-06-14 12:34:13,565 INFO L125 PetriNetUnfolderBase]: For 315651/315659 co-relation queries the response was YES. [2024-06-14 12:34:13,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33057 conditions, 4287 events. 2754/4287 cut-off events. For 315651/315659 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 23328 event pairs, 744 based on Foata normal form. 6/4289 useless extension candidates. Maximal degree in co-relation 32972. Up to 3938 conditions per place. [2024-06-14 12:34:13,611 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 189 selfloop transitions, 56 changer transitions 0/249 dead transitions. [2024-06-14 12:34:13,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 249 transitions, 3072 flow [2024-06-14 12:34:13,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:34:13,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:34:13,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-14 12:34:13,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-14 12:34:13,613 INFO L175 Difference]: Start difference. First operand has 177 places, 230 transitions, 2314 flow. Second operand 8 states and 135 transitions. [2024-06-14 12:34:13,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 249 transitions, 3072 flow [2024-06-14 12:34:13,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 249 transitions, 2888 flow, removed 78 selfloop flow, removed 3 redundant places. [2024-06-14 12:34:13,883 INFO L231 Difference]: Finished difference. Result has 182 places, 230 transitions, 2250 flow [2024-06-14 12:34:13,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2130, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2250, PETRI_PLACES=182, PETRI_TRANSITIONS=230} [2024-06-14 12:34:13,883 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 138 predicate places. [2024-06-14 12:34:13,883 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 230 transitions, 2250 flow [2024-06-14 12:34:13,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:13,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:13,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:13,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 12:34:13,884 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:34:13,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:13,884 INFO L85 PathProgramCache]: Analyzing trace with hash 835875288, now seen corresponding path program 1 times [2024-06-14 12:34:13,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:13,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186614637] [2024-06-14 12:34:13,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:13,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:13,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:14,872 INFO 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 12:34:14,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:14,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186614637] [2024-06-14 12:34:14,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186614637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:14,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:14,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:34:14,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657765574] [2024-06-14 12:34:14,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:14,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:34:14,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:14,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:34:14,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:34:14,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:34:14,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 230 transitions, 2250 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:14,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:14,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:34:14,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:15,690 INFO L124 PetriNetUnfolderBase]: 2759/4300 cut-off events. [2024-06-14 12:34:15,690 INFO L125 PetriNetUnfolderBase]: For 319898/319902 co-relation queries the response was YES. [2024-06-14 12:34:15,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33207 conditions, 4300 events. 2759/4300 cut-off events. For 319898/319902 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 23336 event pairs, 758 based on Foata normal form. 5/4302 useless extension candidates. Maximal degree in co-relation 33120. Up to 4149 conditions per place. [2024-06-14 12:34:15,728 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 228 selfloop transitions, 19 changer transitions 0/251 dead transitions. [2024-06-14 12:34:15,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 251 transitions, 2862 flow [2024-06-14 12:34:15,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:34:15,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:34:15,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-14 12:34:15,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3633720930232558 [2024-06-14 12:34:15,729 INFO L175 Difference]: Start difference. First operand has 182 places, 230 transitions, 2250 flow. Second operand 8 states and 125 transitions. [2024-06-14 12:34:15,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 251 transitions, 2862 flow [2024-06-14 12:34:16,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 251 transitions, 2723 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-14 12:34:16,073 INFO L231 Difference]: Finished difference. Result has 183 places, 233 transitions, 2221 flow [2024-06-14 12:34:16,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2111, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2221, PETRI_PLACES=183, PETRI_TRANSITIONS=233} [2024-06-14 12:34:16,073 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 139 predicate places. [2024-06-14 12:34:16,073 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 233 transitions, 2221 flow [2024-06-14 12:34:16,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:16,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:16,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:16,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 12:34:16,074 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:34:16,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:16,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1260854116, now seen corresponding path program 3 times [2024-06-14 12:34:16,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:16,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221299609] [2024-06-14 12:34:16,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:16,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:16,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:16,860 INFO 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 12:34:16,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:16,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221299609] [2024-06-14 12:34:16,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221299609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:16,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:16,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:34:16,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98867261] [2024-06-14 12:34:16,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:16,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:34:16,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:16,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:34:16,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:34:16,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:34:16,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 233 transitions, 2221 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 12:34:16,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:16,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:34:16,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:17,749 INFO L124 PetriNetUnfolderBase]: 2679/4209 cut-off events. [2024-06-14 12:34:17,749 INFO L125 PetriNetUnfolderBase]: For 330726/330731 co-relation queries the response was YES. [2024-06-14 12:34:17,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33025 conditions, 4209 events. 2679/4209 cut-off events. For 330726/330731 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 23156 event pairs, 713 based on Foata normal form. 1/4196 useless extension candidates. Maximal degree in co-relation 32938. Up to 3843 conditions per place. [2024-06-14 12:34:17,807 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 200 selfloop transitions, 35 changer transitions 0/251 dead transitions. [2024-06-14 12:34:17,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 251 transitions, 2753 flow [2024-06-14 12:34:17,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:34:17,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:34:17,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-14 12:34:17,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119601328903654 [2024-06-14 12:34:17,810 INFO L175 Difference]: Start difference. First operand has 183 places, 233 transitions, 2221 flow. Second operand 7 states and 124 transitions. [2024-06-14 12:34:17,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 251 transitions, 2753 flow [2024-06-14 12:34:18,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 251 transitions, 2641 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-14 12:34:18,330 INFO L231 Difference]: Finished difference. Result has 184 places, 233 transitions, 2186 flow [2024-06-14 12:34:18,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2109, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2186, PETRI_PLACES=184, PETRI_TRANSITIONS=233} [2024-06-14 12:34:18,330 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 140 predicate places. [2024-06-14 12:34:18,331 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 233 transitions, 2186 flow [2024-06-14 12:34:18,331 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 12:34:18,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:18,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:18,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 12:34:18,331 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:34:18,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:18,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1260468166, now seen corresponding path program 4 times [2024-06-14 12:34:18,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:18,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339915282] [2024-06-14 12:34:18,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:18,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:18,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:19,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:34:19,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:19,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339915282] [2024-06-14 12:34:19,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339915282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:19,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:19,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:34:19,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676632665] [2024-06-14 12:34:19,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:19,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:34:19,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:19,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:34:19,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:34:19,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:34:19,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 233 transitions, 2186 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 12:34:19,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:19,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:34:19,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:19,925 INFO L124 PetriNetUnfolderBase]: 2684/4214 cut-off events. [2024-06-14 12:34:19,925 INFO L125 PetriNetUnfolderBase]: For 341634/341639 co-relation queries the response was YES. [2024-06-14 12:34:19,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33332 conditions, 4214 events. 2684/4214 cut-off events. For 341634/341639 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 23184 event pairs, 711 based on Foata normal form. 1/4201 useless extension candidates. Maximal degree in co-relation 33244. Up to 3830 conditions per place. [2024-06-14 12:34:19,969 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 191 selfloop transitions, 44 changer transitions 0/251 dead transitions. [2024-06-14 12:34:19,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 251 transitions, 2758 flow [2024-06-14 12:34:19,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:34:19,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:34:19,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-14 12:34:19,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40863787375415284 [2024-06-14 12:34:19,970 INFO L175 Difference]: Start difference. First operand has 184 places, 233 transitions, 2186 flow. Second operand 7 states and 123 transitions. [2024-06-14 12:34:19,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 251 transitions, 2758 flow [2024-06-14 12:34:20,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 251 transitions, 2626 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 12:34:20,355 INFO L231 Difference]: Finished difference. Result has 184 places, 236 transitions, 2206 flow [2024-06-14 12:34:20,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2054, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2206, PETRI_PLACES=184, PETRI_TRANSITIONS=236} [2024-06-14 12:34:20,356 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 140 predicate places. [2024-06-14 12:34:20,356 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 236 transitions, 2206 flow [2024-06-14 12:34:20,356 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 12:34:20,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:20,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:20,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 12:34:20,356 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:34:20,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:20,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1061166376, now seen corresponding path program 5 times [2024-06-14 12:34:20,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:20,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622073804] [2024-06-14 12:34:20,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:20,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:20,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:21,145 INFO 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 12:34:21,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:21,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622073804] [2024-06-14 12:34:21,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622073804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:21,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:21,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:34:21,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570713780] [2024-06-14 12:34:21,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:21,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:34:21,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:21,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:34:21,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:34:21,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:34:21,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 236 transitions, 2206 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 12:34:21,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:21,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:34:21,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:21,826 INFO L124 PetriNetUnfolderBase]: 2689/4224 cut-off events. [2024-06-14 12:34:21,827 INFO L125 PetriNetUnfolderBase]: For 353266/353277 co-relation queries the response was YES. [2024-06-14 12:34:21,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33574 conditions, 4224 events. 2689/4224 cut-off events. For 353266/353277 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 23192 event pairs, 733 based on Foata normal form. 5/4214 useless extension candidates. Maximal degree in co-relation 33485. Up to 3773 conditions per place. [2024-06-14 12:34:21,866 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 171 selfloop transitions, 64 changer transitions 0/251 dead transitions. [2024-06-14 12:34:21,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 251 transitions, 2884 flow [2024-06-14 12:34:21,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:34:21,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:34:21,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-14 12:34:21,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-14 12:34:21,867 INFO L175 Difference]: Start difference. First operand has 184 places, 236 transitions, 2206 flow. Second operand 7 states and 122 transitions. [2024-06-14 12:34:21,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 251 transitions, 2884 flow [2024-06-14 12:34:22,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 251 transitions, 2764 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-14 12:34:22,311 INFO L231 Difference]: Finished difference. Result has 186 places, 239 transitions, 2278 flow [2024-06-14 12:34:22,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2086, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2278, PETRI_PLACES=186, PETRI_TRANSITIONS=239} [2024-06-14 12:34:22,311 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 142 predicate places. [2024-06-14 12:34:22,311 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 239 transitions, 2278 flow [2024-06-14 12:34:22,312 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 12:34:22,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:22,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:22,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 12:34:22,312 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:34:22,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:22,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1066880296, now seen corresponding path program 6 times [2024-06-14 12:34:22,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:22,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446620005] [2024-06-14 12:34:22,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:22,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:22,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:23,187 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 12:34:23,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:23,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446620005] [2024-06-14 12:34:23,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446620005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:23,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:23,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:34:23,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322837688] [2024-06-14 12:34:23,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:23,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:34:23,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:23,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:34:23,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:34:23,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:34:23,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 239 transitions, 2278 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 12:34:23,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:23,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:34:23,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:23,909 INFO L124 PetriNetUnfolderBase]: 2682/4213 cut-off events. [2024-06-14 12:34:23,909 INFO L125 PetriNetUnfolderBase]: For 362781/362792 co-relation queries the response was YES. [2024-06-14 12:34:23,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33590 conditions, 4213 events. 2682/4213 cut-off events. For 362781/362792 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 23136 event pairs, 733 based on Foata normal form. 6/4204 useless extension candidates. Maximal degree in co-relation 33500. Up to 3766 conditions per place. [2024-06-14 12:34:23,948 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 174 selfloop transitions, 60 changer transitions 0/250 dead transitions. [2024-06-14 12:34:23,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 250 transitions, 2780 flow [2024-06-14 12:34:23,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:34:23,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:34:23,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-14 12:34:23,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-14 12:34:23,949 INFO L175 Difference]: Start difference. First operand has 186 places, 239 transitions, 2278 flow. Second operand 7 states and 122 transitions. [2024-06-14 12:34:23,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 250 transitions, 2780 flow [2024-06-14 12:34:24,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 250 transitions, 2587 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-14 12:34:24,341 INFO L231 Difference]: Finished difference. Result has 189 places, 239 transitions, 2213 flow [2024-06-14 12:34:24,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2085, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2213, PETRI_PLACES=189, PETRI_TRANSITIONS=239} [2024-06-14 12:34:24,343 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 145 predicate places. [2024-06-14 12:34:24,343 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 239 transitions, 2213 flow [2024-06-14 12:34:24,343 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 12:34:24,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:24,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:24,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 12:34:24,344 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:34:24,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:24,344 INFO L85 PathProgramCache]: Analyzing trace with hash -308837382, now seen corresponding path program 2 times [2024-06-14 12:34:24,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:24,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633525036] [2024-06-14 12:34:24,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:24,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:24,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:25,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:34:25,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:25,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633525036] [2024-06-14 12:34:25,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633525036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:25,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:25,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:34:25,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931242582] [2024-06-14 12:34:25,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:25,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:34:25,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:25,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:34:25,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:34:25,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:34:25,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 239 transitions, 2213 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:25,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:25,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:34:25,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:26,092 INFO L124 PetriNetUnfolderBase]: 2759/4303 cut-off events. [2024-06-14 12:34:26,092 INFO L125 PetriNetUnfolderBase]: For 370909/370921 co-relation queries the response was YES. [2024-06-14 12:34:26,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34102 conditions, 4303 events. 2759/4303 cut-off events. For 370909/370921 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 23384 event pairs, 747 based on Foata normal form. 9/4305 useless extension candidates. Maximal degree in co-relation 34011. Up to 4122 conditions per place. [2024-06-14 12:34:26,135 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 218 selfloop transitions, 39 changer transitions 0/261 dead transitions. [2024-06-14 12:34:26,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 261 transitions, 3029 flow [2024-06-14 12:34:26,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:34:26,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:34:26,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-14 12:34:26,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36046511627906974 [2024-06-14 12:34:26,136 INFO L175 Difference]: Start difference. First operand has 189 places, 239 transitions, 2213 flow. Second operand 8 states and 124 transitions. [2024-06-14 12:34:26,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 261 transitions, 3029 flow [2024-06-14 12:34:26,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 261 transitions, 2882 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 12:34:26,490 INFO L231 Difference]: Finished difference. Result has 191 places, 247 transitions, 2312 flow [2024-06-14 12:34:26,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2066, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2312, PETRI_PLACES=191, PETRI_TRANSITIONS=247} [2024-06-14 12:34:26,491 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 147 predicate places. [2024-06-14 12:34:26,492 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 247 transitions, 2312 flow [2024-06-14 12:34:26,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:26,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:26,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:26,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 12:34:26,492 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:34:26,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:26,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1053985753, now seen corresponding path program 4 times [2024-06-14 12:34:26,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:26,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105869637] [2024-06-14 12:34:26,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:26,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:26,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:27,432 INFO 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 12:34:27,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:27,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105869637] [2024-06-14 12:34:27,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105869637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:27,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:27,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:34:27,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258704118] [2024-06-14 12:34:27,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:27,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:34:27,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:27,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:34:27,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:34:27,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:34:27,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 247 transitions, 2312 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:27,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:27,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:34:27,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:28,272 INFO L124 PetriNetUnfolderBase]: 2787/4334 cut-off events. [2024-06-14 12:34:28,273 INFO L125 PetriNetUnfolderBase]: For 390309/390320 co-relation queries the response was YES. [2024-06-14 12:34:28,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34971 conditions, 4334 events. 2787/4334 cut-off events. For 390309/390320 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 23532 event pairs, 756 based on Foata normal form. 6/4325 useless extension candidates. Maximal degree in co-relation 34878. Up to 3887 conditions per place. [2024-06-14 12:34:28,312 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 178 selfloop transitions, 92 changer transitions 0/274 dead transitions. [2024-06-14 12:34:28,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 274 transitions, 3426 flow [2024-06-14 12:34:28,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:34:28,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:34:28,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 12:34:28,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3866279069767442 [2024-06-14 12:34:28,314 INFO L175 Difference]: Start difference. First operand has 191 places, 247 transitions, 2312 flow. Second operand 8 states and 133 transitions. [2024-06-14 12:34:28,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 274 transitions, 3426 flow [2024-06-14 12:34:28,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 274 transitions, 3319 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-14 12:34:28,699 INFO L231 Difference]: Finished difference. Result has 196 places, 258 transitions, 2646 flow [2024-06-14 12:34:28,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2205, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2646, PETRI_PLACES=196, PETRI_TRANSITIONS=258} [2024-06-14 12:34:28,700 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 152 predicate places. [2024-06-14 12:34:28,700 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 258 transitions, 2646 flow [2024-06-14 12:34:28,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:28,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:28,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:28,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 12:34:28,701 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:34:28,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:28,701 INFO L85 PathProgramCache]: Analyzing trace with hash -322170265, now seen corresponding path program 5 times [2024-06-14 12:34:28,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:28,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434000969] [2024-06-14 12:34:28,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:28,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:28,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:29,639 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 12:34:29,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:29,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434000969] [2024-06-14 12:34:29,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434000969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:29,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:29,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:34:29,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754122040] [2024-06-14 12:34:29,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:29,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:34:29,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:29,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:34:29,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:34:29,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:34:29,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 258 transitions, 2646 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:29,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:29,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:34:29,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:30,374 INFO L124 PetriNetUnfolderBase]: 2799/4354 cut-off events. [2024-06-14 12:34:30,375 INFO L125 PetriNetUnfolderBase]: For 407091/407102 co-relation queries the response was YES. [2024-06-14 12:34:30,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36183 conditions, 4354 events. 2799/4354 cut-off events. For 407091/407102 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 23690 event pairs, 764 based on Foata normal form. 6/4345 useless extension candidates. Maximal degree in co-relation 36087. Up to 3900 conditions per place. [2024-06-14 12:34:30,568 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 186 selfloop transitions, 89 changer transitions 0/279 dead transitions. [2024-06-14 12:34:30,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 279 transitions, 3774 flow [2024-06-14 12:34:30,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:34:30,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:34:30,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-14 12:34:30,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-14 12:34:30,570 INFO L175 Difference]: Start difference. First operand has 196 places, 258 transitions, 2646 flow. Second operand 8 states and 135 transitions. [2024-06-14 12:34:30,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 279 transitions, 3774 flow [2024-06-14 12:34:30,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 279 transitions, 3572 flow, removed 68 selfloop flow, removed 3 redundant places. [2024-06-14 12:34:30,990 INFO L231 Difference]: Finished difference. Result has 202 places, 263 transitions, 2776 flow [2024-06-14 12:34:30,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2456, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2776, PETRI_PLACES=202, PETRI_TRANSITIONS=263} [2024-06-14 12:34:30,991 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 158 predicate places. [2024-06-14 12:34:30,991 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 263 transitions, 2776 flow [2024-06-14 12:34:30,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:30,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:30,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:30,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 12:34:30,992 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:34:30,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:30,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1066872360, now seen corresponding path program 3 times [2024-06-14 12:34:30,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:30,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889335161] [2024-06-14 12:34:30,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:30,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:31,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:31,934 INFO 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 12:34:31,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:31,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889335161] [2024-06-14 12:34:31,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889335161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:31,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:31,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:34:31,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219139754] [2024-06-14 12:34:31,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:31,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:34:31,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:31,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:34:31,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:34:32,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:34:32,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 263 transitions, 2776 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:32,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:32,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:34:32,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:32,710 INFO L124 PetriNetUnfolderBase]: 2804/4374 cut-off events. [2024-06-14 12:34:32,710 INFO L125 PetriNetUnfolderBase]: For 420278/420290 co-relation queries the response was YES. [2024-06-14 12:34:32,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36750 conditions, 4374 events. 2804/4374 cut-off events. For 420278/420290 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 23870 event pairs, 747 based on Foata normal form. 9/4376 useless extension candidates. Maximal degree in co-relation 36651. Up to 4184 conditions per place. [2024-06-14 12:34:32,758 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 237 selfloop transitions, 40 changer transitions 0/281 dead transitions. [2024-06-14 12:34:32,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 281 transitions, 3568 flow [2024-06-14 12:34:32,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:34:32,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:34:32,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-14 12:34:32,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36627906976744184 [2024-06-14 12:34:32,759 INFO L175 Difference]: Start difference. First operand has 202 places, 263 transitions, 2776 flow. Second operand 8 states and 126 transitions. [2024-06-14 12:34:32,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 281 transitions, 3568 flow [2024-06-14 12:34:33,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 281 transitions, 3277 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-14 12:34:33,161 INFO L231 Difference]: Finished difference. Result has 204 places, 267 transitions, 2641 flow [2024-06-14 12:34:33,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2485, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2641, PETRI_PLACES=204, PETRI_TRANSITIONS=267} [2024-06-14 12:34:33,162 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 160 predicate places. [2024-06-14 12:34:33,162 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 267 transitions, 2641 flow [2024-06-14 12:34:33,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:33,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:33,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:33,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 12:34:33,163 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:34:33,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:33,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1053985350, now seen corresponding path program 4 times [2024-06-14 12:34:33,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:33,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773330789] [2024-06-14 12:34:33,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:33,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:33,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:34,230 INFO 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 12:34:34,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:34,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773330789] [2024-06-14 12:34:34,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773330789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:34,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:34,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:34:34,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073300535] [2024-06-14 12:34:34,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:34,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:34:34,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:34,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:34:34,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:34:34,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:34:34,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 267 transitions, 2641 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:34,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:34,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:34:34,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:35,075 INFO L124 PetriNetUnfolderBase]: 2801/4370 cut-off events. [2024-06-14 12:34:35,075 INFO L125 PetriNetUnfolderBase]: For 429360/429372 co-relation queries the response was YES. [2024-06-14 12:34:35,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36468 conditions, 4370 events. 2801/4370 cut-off events. For 429360/429372 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 23856 event pairs, 747 based on Foata normal form. 9/4372 useless extension candidates. Maximal degree in co-relation 36368. Up to 4181 conditions per place. [2024-06-14 12:34:35,122 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 235 selfloop transitions, 41 changer transitions 0/280 dead transitions. [2024-06-14 12:34:35,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 280 transitions, 3235 flow [2024-06-14 12:34:35,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:34:35,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:34:35,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-14 12:34:35,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36046511627906974 [2024-06-14 12:34:35,124 INFO L175 Difference]: Start difference. First operand has 204 places, 267 transitions, 2641 flow. Second operand 8 states and 124 transitions. [2024-06-14 12:34:35,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 280 transitions, 3235 flow [2024-06-14 12:34:35,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 280 transitions, 3094 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-14 12:34:35,575 INFO L231 Difference]: Finished difference. Result has 208 places, 267 transitions, 2588 flow [2024-06-14 12:34:35,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2500, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2588, PETRI_PLACES=208, PETRI_TRANSITIONS=267} [2024-06-14 12:34:35,576 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 164 predicate places. [2024-06-14 12:34:35,576 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 267 transitions, 2588 flow [2024-06-14 12:34:35,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:35,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:35,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:35,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 12:34:35,577 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:34:35,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:35,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1066883923, now seen corresponding path program 6 times [2024-06-14 12:34:35,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:35,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934213170] [2024-06-14 12:34:35,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:35,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:35,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:36,529 INFO 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 12:34:36,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:36,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934213170] [2024-06-14 12:34:36,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934213170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:36,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:36,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:34:36,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852148993] [2024-06-14 12:34:36,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:36,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:34:36,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:36,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:34:36,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:34:36,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:34:36,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 267 transitions, 2588 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:36,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:36,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:34:36,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:37,351 INFO L124 PetriNetUnfolderBase]: 2803/4360 cut-off events. [2024-06-14 12:34:37,351 INFO L125 PetriNetUnfolderBase]: For 440546/440557 co-relation queries the response was YES. [2024-06-14 12:34:37,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36536 conditions, 4360 events. 2803/4360 cut-off events. For 440546/440557 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 23740 event pairs, 764 based on Foata normal form. 6/4351 useless extension candidates. Maximal degree in co-relation 36435. Up to 3907 conditions per place. [2024-06-14 12:34:37,403 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 184 selfloop transitions, 97 changer transitions 0/285 dead transitions. [2024-06-14 12:34:37,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 285 transitions, 3535 flow [2024-06-14 12:34:37,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:34:37,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:34:37,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-14 12:34:37,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38953488372093026 [2024-06-14 12:34:37,405 INFO L175 Difference]: Start difference. First operand has 208 places, 267 transitions, 2588 flow. Second operand 8 states and 134 transitions. [2024-06-14 12:34:37,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 285 transitions, 3535 flow [2024-06-14 12:34:37,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 285 transitions, 3461 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-14 12:34:37,990 INFO L231 Difference]: Finished difference. Result has 210 places, 271 transitions, 2806 flow [2024-06-14 12:34:37,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2514, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2806, PETRI_PLACES=210, PETRI_TRANSITIONS=271} [2024-06-14 12:34:37,991 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 166 predicate places. [2024-06-14 12:34:37,991 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 271 transitions, 2806 flow [2024-06-14 12:34:37,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:37,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:37,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:37,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 12:34:37,991 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:34:37,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:37,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1435485656, now seen corresponding path program 1 times [2024-06-14 12:34:37,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:37,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662346718] [2024-06-14 12:34:37,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:37,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:38,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:38,933 INFO 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 12:34:38,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:38,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662346718] [2024-06-14 12:34:38,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662346718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:38,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:38,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:34:38,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686065013] [2024-06-14 12:34:38,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:38,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:34:38,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:38,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:34:38,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:34:39,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:34:39,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 271 transitions, 2806 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:39,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:39,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:34:39,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:39,899 INFO L124 PetriNetUnfolderBase]: 2622/4181 cut-off events. [2024-06-14 12:34:39,900 INFO L125 PetriNetUnfolderBase]: For 453913/453915 co-relation queries the response was YES. [2024-06-14 12:34:39,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35945 conditions, 4181 events. 2622/4181 cut-off events. For 453913/453915 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 23447 event pairs, 717 based on Foata normal form. 1/4179 useless extension candidates. Maximal degree in co-relation 35843. Up to 3799 conditions per place. [2024-06-14 12:34:39,943 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 242 selfloop transitions, 19 changer transitions 0/288 dead transitions. [2024-06-14 12:34:39,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 288 transitions, 3380 flow [2024-06-14 12:34:39,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:34:39,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:34:39,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-14 12:34:39,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219269102990033 [2024-06-14 12:34:39,945 INFO L175 Difference]: Start difference. First operand has 210 places, 271 transitions, 2806 flow. Second operand 7 states and 127 transitions. [2024-06-14 12:34:39,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 288 transitions, 3380 flow [2024-06-14 12:34:40,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 288 transitions, 3118 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-14 12:34:40,444 INFO L231 Difference]: Finished difference. Result has 212 places, 271 transitions, 2592 flow [2024-06-14 12:34:40,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2544, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2592, PETRI_PLACES=212, PETRI_TRANSITIONS=271} [2024-06-14 12:34:40,445 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 168 predicate places. [2024-06-14 12:34:40,445 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 271 transitions, 2592 flow [2024-06-14 12:34:40,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:40,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:40,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:40,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 12:34:40,446 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:34:40,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:40,447 INFO L85 PathProgramCache]: Analyzing trace with hash -206665095, now seen corresponding path program 1 times [2024-06-14 12:34:40,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:40,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138647758] [2024-06-14 12:34:40,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:40,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:40,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:41,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:34:41,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:41,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138647758] [2024-06-14 12:34:41,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138647758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:41,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:41,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:34:41,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754696667] [2024-06-14 12:34:41,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:41,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:34:41,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:41,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:34:41,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:34:41,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:34:41,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 271 transitions, 2592 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:41,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:41,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:34:41,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:42,238 INFO L124 PetriNetUnfolderBase]: 2706/4269 cut-off events. [2024-06-14 12:34:42,239 INFO L125 PetriNetUnfolderBase]: For 466133/466135 co-relation queries the response was YES. [2024-06-14 12:34:42,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36239 conditions, 4269 events. 2706/4269 cut-off events. For 466133/466135 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 23600 event pairs, 750 based on Foata normal form. 2/4268 useless extension candidates. Maximal degree in co-relation 36136. Up to 4013 conditions per place. [2024-06-14 12:34:42,286 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 263 selfloop transitions, 20 changer transitions 0/293 dead transitions. [2024-06-14 12:34:42,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 293 transitions, 3274 flow [2024-06-14 12:34:42,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:34:42,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:34:42,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-14 12:34:42,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-14 12:34:42,288 INFO L175 Difference]: Start difference. First operand has 212 places, 271 transitions, 2592 flow. Second operand 8 states and 135 transitions. [2024-06-14 12:34:42,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 293 transitions, 3274 flow [2024-06-14 12:34:42,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 293 transitions, 3226 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 12:34:42,806 INFO L231 Difference]: Finished difference. Result has 214 places, 274 transitions, 2654 flow [2024-06-14 12:34:42,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2544, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2654, PETRI_PLACES=214, PETRI_TRANSITIONS=274} [2024-06-14 12:34:42,806 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 170 predicate places. [2024-06-14 12:34:42,806 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 274 transitions, 2654 flow [2024-06-14 12:34:42,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:42,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:42,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:42,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 12:34:42,807 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:34:42,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:42,807 INFO L85 PathProgramCache]: Analyzing trace with hash 2037699187, now seen corresponding path program 2 times [2024-06-14 12:34:42,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:42,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617381663] [2024-06-14 12:34:42,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:42,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:42,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:43,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:34:43,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:43,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617381663] [2024-06-14 12:34:43,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617381663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:43,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:43,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:34:43,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27695794] [2024-06-14 12:34:43,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:43,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:34:43,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:43,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:34:43,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:34:43,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:34:43,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 274 transitions, 2654 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:43,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:43,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:34:43,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:44,603 INFO L124 PetriNetUnfolderBase]: 2740/4316 cut-off events. [2024-06-14 12:34:44,604 INFO L125 PetriNetUnfolderBase]: For 487863/487865 co-relation queries the response was YES. [2024-06-14 12:34:44,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37423 conditions, 4316 events. 2740/4316 cut-off events. For 487863/487865 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 23813 event pairs, 753 based on Foata normal form. 2/4315 useless extension candidates. Maximal degree in co-relation 37319. Up to 4024 conditions per place. [2024-06-14 12:34:44,652 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 256 selfloop transitions, 36 changer transitions 0/302 dead transitions. [2024-06-14 12:34:44,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 302 transitions, 3754 flow [2024-06-14 12:34:44,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:34:44,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:34:44,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 12:34:44,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-14 12:34:44,653 INFO L175 Difference]: Start difference. First operand has 214 places, 274 transitions, 2654 flow. Second operand 8 states and 139 transitions. [2024-06-14 12:34:44,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 302 transitions, 3754 flow [2024-06-14 12:34:45,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 302 transitions, 3666 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-14 12:34:45,144 INFO L231 Difference]: Finished difference. Result has 216 places, 283 transitions, 2842 flow [2024-06-14 12:34:45,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2566, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2842, PETRI_PLACES=216, PETRI_TRANSITIONS=283} [2024-06-14 12:34:45,145 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 172 predicate places. [2024-06-14 12:34:45,145 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 283 transitions, 2842 flow [2024-06-14 12:34:45,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:45,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:45,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:45,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 12:34:45,146 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:34:45,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:45,146 INFO L85 PathProgramCache]: Analyzing trace with hash -202940228, now seen corresponding path program 1 times [2024-06-14 12:34:45,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:45,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595038127] [2024-06-14 12:34:45,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:45,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:45,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:46,059 INFO 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 12:34:46,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:46,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595038127] [2024-06-14 12:34:46,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595038127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:46,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:46,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:34:46,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739475998] [2024-06-14 12:34:46,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:46,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:34:46,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:46,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:34:46,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:34:46,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:34:46,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 283 transitions, 2842 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:46,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:46,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:34:46,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:46,934 INFO L124 PetriNetUnfolderBase]: 2745/4324 cut-off events. [2024-06-14 12:34:46,934 INFO L125 PetriNetUnfolderBase]: For 504224/504226 co-relation queries the response was YES. [2024-06-14 12:34:46,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37991 conditions, 4324 events. 2745/4324 cut-off events. For 504224/504226 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 23869 event pairs, 776 based on Foata normal form. 2/4323 useless extension candidates. Maximal degree in co-relation 37886. Up to 4090 conditions per place. [2024-06-14 12:34:46,981 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 273 selfloop transitions, 17 changer transitions 0/300 dead transitions. [2024-06-14 12:34:46,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 300 transitions, 3524 flow [2024-06-14 12:34:46,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:34:46,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:34:46,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-14 12:34:46,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-14 12:34:46,982 INFO L175 Difference]: Start difference. First operand has 216 places, 283 transitions, 2842 flow. Second operand 8 states and 129 transitions. [2024-06-14 12:34:46,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 300 transitions, 3524 flow [2024-06-14 12:34:47,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 300 transitions, 3434 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-06-14 12:34:47,553 INFO L231 Difference]: Finished difference. Result has 221 places, 286 transitions, 2860 flow [2024-06-14 12:34:47,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2752, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2860, PETRI_PLACES=221, PETRI_TRANSITIONS=286} [2024-06-14 12:34:47,554 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 177 predicate places. [2024-06-14 12:34:47,554 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 286 transitions, 2860 flow [2024-06-14 12:34:47,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:47,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:47,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:47,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 12:34:47,555 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:34:47,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:47,555 INFO L85 PathProgramCache]: Analyzing trace with hash 2037704767, now seen corresponding path program 3 times [2024-06-14 12:34:47,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:47,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200993449] [2024-06-14 12:34:47,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:47,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:47,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:48,402 INFO 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 12:34:48,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:48,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200993449] [2024-06-14 12:34:48,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200993449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:48,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:48,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:34:48,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220481984] [2024-06-14 12:34:48,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:48,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:34:48,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:48,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:34:48,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:34:48,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:34:48,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 286 transitions, 2860 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:48,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:48,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:34:48,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:49,292 INFO L124 PetriNetUnfolderBase]: 2739/4317 cut-off events. [2024-06-14 12:34:49,292 INFO L125 PetriNetUnfolderBase]: For 511750/511752 co-relation queries the response was YES. [2024-06-14 12:34:49,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38151 conditions, 4317 events. 2739/4317 cut-off events. For 511750/511752 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 23901 event pairs, 749 based on Foata normal form. 2/4316 useless extension candidates. Maximal degree in co-relation 38044. Up to 4026 conditions per place. [2024-06-14 12:34:49,341 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 256 selfloop transitions, 38 changer transitions 0/304 dead transitions. [2024-06-14 12:34:49,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 304 transitions, 3640 flow [2024-06-14 12:34:49,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:34:49,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:34:49,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-14 12:34:49,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-14 12:34:49,343 INFO L175 Difference]: Start difference. First operand has 221 places, 286 transitions, 2860 flow. Second operand 8 states and 137 transitions. [2024-06-14 12:34:49,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 304 transitions, 3640 flow [2024-06-14 12:34:50,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 304 transitions, 3512 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-14 12:34:50,027 INFO L231 Difference]: Finished difference. Result has 223 places, 286 transitions, 2814 flow [2024-06-14 12:34:50,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2732, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2814, PETRI_PLACES=223, PETRI_TRANSITIONS=286} [2024-06-14 12:34:50,028 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 179 predicate places. [2024-06-14 12:34:50,028 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 286 transitions, 2814 flow [2024-06-14 12:34:50,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:50,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:50,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:50,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 12:34:50,028 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:34:50,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:50,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1053533928, now seen corresponding path program 2 times [2024-06-14 12:34:50,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:50,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757064899] [2024-06-14 12:34:50,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:50,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:50,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:50,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:34:50,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:50,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757064899] [2024-06-14 12:34:50,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757064899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:50,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:50,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:34:50,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024540334] [2024-06-14 12:34:50,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:50,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:34:50,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:50,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:34:50,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:34:50,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:34:50,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 286 transitions, 2814 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:50,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:50,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:34:50,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:51,714 INFO L124 PetriNetUnfolderBase]: 2744/4326 cut-off events. [2024-06-14 12:34:51,715 INFO L125 PetriNetUnfolderBase]: For 525535/525543 co-relation queries the response was YES. [2024-06-14 12:34:51,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38385 conditions, 4326 events. 2744/4326 cut-off events. For 525535/525543 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 23953 event pairs, 779 based on Foata normal form. 6/4328 useless extension candidates. Maximal degree in co-relation 38277. Up to 4059 conditions per place. [2024-06-14 12:34:51,763 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 254 selfloop transitions, 40 changer transitions 0/304 dead transitions. [2024-06-14 12:34:51,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 304 transitions, 3710 flow [2024-06-14 12:34:51,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:34:51,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:34:51,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 12:34:51,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3808139534883721 [2024-06-14 12:34:51,765 INFO L175 Difference]: Start difference. First operand has 223 places, 286 transitions, 2814 flow. Second operand 8 states and 131 transitions. [2024-06-14 12:34:51,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 304 transitions, 3710 flow [2024-06-14 12:34:52,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 304 transitions, 3638 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 12:34:52,483 INFO L231 Difference]: Finished difference. Result has 225 places, 292 transitions, 2971 flow [2024-06-14 12:34:52,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2742, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2971, PETRI_PLACES=225, PETRI_TRANSITIONS=292} [2024-06-14 12:34:52,484 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 181 predicate places. [2024-06-14 12:34:52,484 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 292 transitions, 2971 flow [2024-06-14 12:34:52,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:52,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:52,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:52,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 12:34:52,485 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:34:52,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:52,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1053801055, now seen corresponding path program 4 times [2024-06-14 12:34:52,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:52,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038881908] [2024-06-14 12:34:52,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:52,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:52,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:53,377 INFO 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 12:34:53,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:53,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038881908] [2024-06-14 12:34:53,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038881908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:53,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:53,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:34:53,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760998008] [2024-06-14 12:34:53,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:53,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:34:53,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:53,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:34:53,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:34:53,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:34:53,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 292 transitions, 2971 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:53,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:53,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:34:53,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:54,232 INFO L124 PetriNetUnfolderBase]: 2727/4314 cut-off events. [2024-06-14 12:34:54,233 INFO L125 PetriNetUnfolderBase]: For 545872/545880 co-relation queries the response was YES. [2024-06-14 12:34:54,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38789 conditions, 4314 events. 2727/4314 cut-off events. For 545872/545880 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 24124 event pairs, 744 based on Foata normal form. 3/4313 useless extension candidates. Maximal degree in co-relation 38680. Up to 3980 conditions per place. [2024-06-14 12:34:54,283 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 246 selfloop transitions, 57 changer transitions 0/313 dead transitions. [2024-06-14 12:34:54,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 313 transitions, 3911 flow [2024-06-14 12:34:54,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:34:54,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:34:54,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-14 12:34:54,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-14 12:34:54,286 INFO L175 Difference]: Start difference. First operand has 225 places, 292 transitions, 2971 flow. Second operand 8 states and 137 transitions. [2024-06-14 12:34:54,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 313 transitions, 3911 flow [2024-06-14 12:34:54,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 313 transitions, 3799 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-14 12:34:54,984 INFO L231 Difference]: Finished difference. Result has 229 places, 298 transitions, 3133 flow [2024-06-14 12:34:54,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2859, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3133, PETRI_PLACES=229, PETRI_TRANSITIONS=298} [2024-06-14 12:34:54,985 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 185 predicate places. [2024-06-14 12:34:54,985 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 298 transitions, 3133 flow [2024-06-14 12:34:54,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:54,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:54,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:54,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 12:34:54,986 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:34:54,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:54,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1053800838, now seen corresponding path program 3 times [2024-06-14 12:34:54,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:54,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278443612] [2024-06-14 12:34:54,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:54,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:54,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:55,937 INFO 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 12:34:55,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:55,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278443612] [2024-06-14 12:34:55,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278443612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:55,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:55,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:34:55,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110044987] [2024-06-14 12:34:55,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:55,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:34:55,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:55,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:34:55,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:34:56,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:34:56,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 298 transitions, 3133 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:56,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:56,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:34:56,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:56,895 INFO L124 PetriNetUnfolderBase]: 2732/4323 cut-off events. [2024-06-14 12:34:56,896 INFO L125 PetriNetUnfolderBase]: For 562317/562325 co-relation queries the response was YES. [2024-06-14 12:34:56,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39432 conditions, 4323 events. 2732/4323 cut-off events. For 562317/562325 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 24189 event pairs, 743 based on Foata normal form. 6/4325 useless extension candidates. Maximal degree in co-relation 39321. Up to 4052 conditions per place. [2024-06-14 12:34:56,941 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 262 selfloop transitions, 41 changer transitions 0/313 dead transitions. [2024-06-14 12:34:56,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 313 transitions, 3971 flow [2024-06-14 12:34:56,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:34:56,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:34:56,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 12:34:56,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-14 12:34:56,942 INFO L175 Difference]: Start difference. First operand has 229 places, 298 transitions, 3133 flow. Second operand 8 states and 132 transitions. [2024-06-14 12:34:56,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 313 transitions, 3971 flow [2024-06-14 12:34:57,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 313 transitions, 3851 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-14 12:34:57,540 INFO L231 Difference]: Finished difference. Result has 233 places, 301 transitions, 3157 flow [2024-06-14 12:34:57,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3013, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3157, PETRI_PLACES=233, PETRI_TRANSITIONS=301} [2024-06-14 12:34:57,541 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 189 predicate places. [2024-06-14 12:34:57,541 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 301 transitions, 3157 flow [2024-06-14 12:34:57,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:57,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:57,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:57,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 12:34:57,542 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:34:57,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:57,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1061158285, now seen corresponding path program 5 times [2024-06-14 12:34:57,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:57,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055161674] [2024-06-14 12:34:57,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:57,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:57,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:58,383 INFO 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 12:34:58,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:58,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055161674] [2024-06-14 12:34:58,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055161674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:58,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:58,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:34:58,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180363526] [2024-06-14 12:34:58,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:58,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:34:58,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:58,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:34:58,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:34:58,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:34:58,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 301 transitions, 3157 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:58,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:58,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:34:58,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:59,227 INFO L124 PetriNetUnfolderBase]: 2742/4337 cut-off events. [2024-06-14 12:34:59,227 INFO L125 PetriNetUnfolderBase]: For 573932/573940 co-relation queries the response was YES. [2024-06-14 12:34:59,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39434 conditions, 4337 events. 2742/4337 cut-off events. For 573932/573940 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 24253 event pairs, 748 based on Foata normal form. 3/4336 useless extension candidates. Maximal degree in co-relation 39321. Up to 3997 conditions per place. [2024-06-14 12:34:59,278 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 253 selfloop transitions, 57 changer transitions 0/320 dead transitions. [2024-06-14 12:34:59,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 320 transitions, 4187 flow [2024-06-14 12:34:59,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:34:59,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:34:59,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 12:34:59,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-14 12:34:59,279 INFO L175 Difference]: Start difference. First operand has 233 places, 301 transitions, 3157 flow. Second operand 8 states and 139 transitions. [2024-06-14 12:34:59,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 320 transitions, 4187 flow [2024-06-14 12:34:59,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 320 transitions, 4085 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-14 12:34:59,897 INFO L231 Difference]: Finished difference. Result has 236 places, 304 transitions, 3247 flow [2024-06-14 12:34:59,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3055, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3247, PETRI_PLACES=236, PETRI_TRANSITIONS=304} [2024-06-14 12:34:59,897 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 192 predicate places. [2024-06-14 12:34:59,897 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 304 transitions, 3247 flow [2024-06-14 12:34:59,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:59,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:59,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:59,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 12:34:59,898 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:34:59,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:59,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1061152705, now seen corresponding path program 6 times [2024-06-14 12:34:59,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:59,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749630382] [2024-06-14 12:34:59,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:59,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:59,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:00,850 INFO 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 12:35:00,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:00,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749630382] [2024-06-14 12:35:00,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749630382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:00,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:00,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:35:00,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500061016] [2024-06-14 12:35:00,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:00,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:35:00,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:00,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:35:00,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:35:00,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:35:00,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 304 transitions, 3247 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:00,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:00,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:35:00,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:01,716 INFO L124 PetriNetUnfolderBase]: 2736/4329 cut-off events. [2024-06-14 12:35:01,716 INFO L125 PetriNetUnfolderBase]: For 583061/583069 co-relation queries the response was YES. [2024-06-14 12:35:01,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39452 conditions, 4329 events. 2736/4329 cut-off events. For 583061/583069 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 24215 event pairs, 747 based on Foata normal form. 3/4328 useless extension candidates. Maximal degree in co-relation 39338. Up to 3992 conditions per place. [2024-06-14 12:35:01,770 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 254 selfloop transitions, 56 changer transitions 0/320 dead transitions. [2024-06-14 12:35:01,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 320 transitions, 4063 flow [2024-06-14 12:35:01,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:35:01,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:35:01,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 12:35:01,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-14 12:35:01,772 INFO L175 Difference]: Start difference. First operand has 236 places, 304 transitions, 3247 flow. Second operand 8 states and 140 transitions. [2024-06-14 12:35:01,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 320 transitions, 4063 flow [2024-06-14 12:35:02,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 320 transitions, 3821 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-14 12:35:02,591 INFO L231 Difference]: Finished difference. Result has 238 places, 304 transitions, 3123 flow [2024-06-14 12:35:02,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3005, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3123, PETRI_PLACES=238, PETRI_TRANSITIONS=304} [2024-06-14 12:35:02,591 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 194 predicate places. [2024-06-14 12:35:02,592 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 304 transitions, 3123 flow [2024-06-14 12:35:02,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:02,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:02,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:02,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 12:35:02,592 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:35:02,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:02,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1061152488, now seen corresponding path program 4 times [2024-06-14 12:35:02,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:02,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467332009] [2024-06-14 12:35:02,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:02,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:02,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:03,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:03,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:03,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467332009] [2024-06-14 12:35:03,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467332009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:03,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:03,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:35:03,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695723452] [2024-06-14 12:35:03,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:03,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:35:03,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:03,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:35:03,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:35:03,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:35:03,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 304 transitions, 3123 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:03,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:03,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:35:03,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:04,459 INFO L124 PetriNetUnfolderBase]: 2730/4320 cut-off events. [2024-06-14 12:35:04,459 INFO L125 PetriNetUnfolderBase]: For 590645/590653 co-relation queries the response was YES. [2024-06-14 12:35:04,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39148 conditions, 4320 events. 2730/4320 cut-off events. For 590645/590653 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 24128 event pairs, 762 based on Foata normal form. 6/4322 useless extension candidates. Maximal degree in co-relation 39034. Up to 4053 conditions per place. [2024-06-14 12:35:04,515 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 265 selfloop transitions, 40 changer transitions 0/315 dead transitions. [2024-06-14 12:35:04,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 315 transitions, 3763 flow [2024-06-14 12:35:04,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:35:04,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:35:04,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 12:35:04,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-14 12:35:04,516 INFO L175 Difference]: Start difference. First operand has 238 places, 304 transitions, 3123 flow. Second operand 8 states and 132 transitions. [2024-06-14 12:35:04,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 315 transitions, 3763 flow [2024-06-14 12:35:05,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 315 transitions, 3573 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-14 12:35:05,114 INFO L231 Difference]: Finished difference. Result has 238 places, 304 transitions, 3019 flow [2024-06-14 12:35:05,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2933, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3019, PETRI_PLACES=238, PETRI_TRANSITIONS=304} [2024-06-14 12:35:05,115 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 194 predicate places. [2024-06-14 12:35:05,115 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 304 transitions, 3019 flow [2024-06-14 12:35:05,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:05,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:05,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:05,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 12:35:05,115 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:35:05,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:05,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1053524008, now seen corresponding path program 1 times [2024-06-14 12:35:05,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:05,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804246986] [2024-06-14 12:35:05,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:05,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:05,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:06,349 INFO 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 12:35:06,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:06,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804246986] [2024-06-14 12:35:06,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804246986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:06,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:06,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:35:06,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306033328] [2024-06-14 12:35:06,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:06,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:35:06,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:06,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:35:06,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:35:06,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:35:06,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 304 transitions, 3019 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:06,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:06,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:35:06,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:07,340 INFO L124 PetriNetUnfolderBase]: 2873/4462 cut-off events. [2024-06-14 12:35:07,340 INFO L125 PetriNetUnfolderBase]: For 600570/600572 co-relation queries the response was YES. [2024-06-14 12:35:07,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40071 conditions, 4462 events. 2873/4462 cut-off events. For 600570/600572 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 24393 event pairs, 787 based on Foata normal form. 1/4460 useless extension candidates. Maximal degree in co-relation 39956. Up to 4326 conditions per place. [2024-06-14 12:35:07,389 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 295 selfloop transitions, 20 changer transitions 0/319 dead transitions. [2024-06-14 12:35:07,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 319 transitions, 3763 flow [2024-06-14 12:35:07,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:35:07,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:35:07,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 131 transitions. [2024-06-14 12:35:07,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3385012919896641 [2024-06-14 12:35:07,390 INFO L175 Difference]: Start difference. First operand has 238 places, 304 transitions, 3019 flow. Second operand 9 states and 131 transitions. [2024-06-14 12:35:07,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 319 transitions, 3763 flow [2024-06-14 12:35:08,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 319 transitions, 3639 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-14 12:35:08,107 INFO L231 Difference]: Finished difference. Result has 239 places, 307 transitions, 3029 flow [2024-06-14 12:35:08,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2895, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3029, PETRI_PLACES=239, PETRI_TRANSITIONS=307} [2024-06-14 12:35:08,107 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 195 predicate places. [2024-06-14 12:35:08,107 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 307 transitions, 3029 flow [2024-06-14 12:35:08,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:08,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:08,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:08,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 12:35:08,108 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:35:08,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:08,108 INFO L85 PathProgramCache]: Analyzing trace with hash -153495728, now seen corresponding path program 1 times [2024-06-14 12:35:08,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:08,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668635644] [2024-06-14 12:35:08,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:08,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:08,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:08,899 INFO 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 12:35:08,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:08,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668635644] [2024-06-14 12:35:08,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668635644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:08,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:08,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:35:08,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285105849] [2024-06-14 12:35:08,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:08,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:35:08,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:08,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:35:08,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:35:08,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:35:08,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 307 transitions, 3029 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:08,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:08,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:35:08,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:09,849 INFO L124 PetriNetUnfolderBase]: 2817/4417 cut-off events. [2024-06-14 12:35:09,850 INFO L125 PetriNetUnfolderBase]: For 624461/624471 co-relation queries the response was YES. [2024-06-14 12:35:09,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40398 conditions, 4417 events. 2817/4417 cut-off events. For 624461/624471 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 24502 event pairs, 545 based on Foata normal form. 12/4425 useless extension candidates. Maximal degree in co-relation 40282. Up to 3937 conditions per place. [2024-06-14 12:35:09,905 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 274 selfloop transitions, 37 changer transitions 0/339 dead transitions. [2024-06-14 12:35:09,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 339 transitions, 3843 flow [2024-06-14 12:35:09,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:35:09,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:35:09,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 12:35:09,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-14 12:35:09,906 INFO L175 Difference]: Start difference. First operand has 239 places, 307 transitions, 3029 flow. Second operand 8 states and 147 transitions. [2024-06-14 12:35:09,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 339 transitions, 3843 flow [2024-06-14 12:35:10,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 339 transitions, 3660 flow, removed 41 selfloop flow, removed 10 redundant places. [2024-06-14 12:35:10,556 INFO L231 Difference]: Finished difference. Result has 237 places, 310 transitions, 3030 flow [2024-06-14 12:35:10,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2846, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3030, PETRI_PLACES=237, PETRI_TRANSITIONS=310} [2024-06-14 12:35:10,556 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 193 predicate places. [2024-06-14 12:35:10,556 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 310 transitions, 3030 flow [2024-06-14 12:35:10,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:10,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:10,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:10,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 12:35:10,557 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:35:10,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:10,557 INFO L85 PathProgramCache]: Analyzing trace with hash -2089771460, now seen corresponding path program 2 times [2024-06-14 12:35:10,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:10,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255262911] [2024-06-14 12:35:10,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:10,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:10,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:11,468 INFO 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 12:35:11,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:11,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255262911] [2024-06-14 12:35:11,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255262911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:11,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:11,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:35:11,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483858640] [2024-06-14 12:35:11,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:11,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:35:11,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:11,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:35:11,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:35:11,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:35:11,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 310 transitions, 3030 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:11,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:11,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:35:11,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:12,492 INFO L124 PetriNetUnfolderBase]: 2833/4441 cut-off events. [2024-06-14 12:35:12,492 INFO L125 PetriNetUnfolderBase]: For 642112/642122 co-relation queries the response was YES. [2024-06-14 12:35:12,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41172 conditions, 4441 events. 2833/4441 cut-off events. For 642112/642122 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 24648 event pairs, 705 based on Foata normal form. 12/4449 useless extension candidates. Maximal degree in co-relation 41056. Up to 4014 conditions per place. [2024-06-14 12:35:12,570 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 272 selfloop transitions, 38 changer transitions 0/338 dead transitions. [2024-06-14 12:35:12,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 338 transitions, 3836 flow [2024-06-14 12:35:12,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:35:12,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:35:12,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 12:35:12,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 12:35:12,571 INFO L175 Difference]: Start difference. First operand has 237 places, 310 transitions, 3030 flow. Second operand 8 states and 144 transitions. [2024-06-14 12:35:12,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 338 transitions, 3836 flow [2024-06-14 12:35:13,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 338 transitions, 3674 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-14 12:35:13,391 INFO L231 Difference]: Finished difference. Result has 239 places, 313 transitions, 3060 flow [2024-06-14 12:35:13,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2868, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3060, PETRI_PLACES=239, PETRI_TRANSITIONS=313} [2024-06-14 12:35:13,392 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 195 predicate places. [2024-06-14 12:35:13,392 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 313 transitions, 3060 flow [2024-06-14 12:35:13,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:13,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:13,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:13,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 12:35:13,393 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:35:13,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:13,393 INFO L85 PathProgramCache]: Analyzing trace with hash -2089760548, now seen corresponding path program 1 times [2024-06-14 12:35:13,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:13,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954519602] [2024-06-14 12:35:13,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:13,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:13,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:14,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:14,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:14,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954519602] [2024-06-14 12:35:14,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954519602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:14,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:14,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:35:14,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843270690] [2024-06-14 12:35:14,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:14,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:35:14,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:14,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:35:14,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:35:14,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:35:14,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 313 transitions, 3060 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:14,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:14,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:35:14,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:15,333 INFO L124 PetriNetUnfolderBase]: 2915/4527 cut-off events. [2024-06-14 12:35:15,333 INFO L125 PetriNetUnfolderBase]: For 650410/650420 co-relation queries the response was YES. [2024-06-14 12:35:15,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41830 conditions, 4527 events. 2915/4527 cut-off events. For 650410/650420 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 24781 event pairs, 734 based on Foata normal form. 10/4533 useless extension candidates. Maximal degree in co-relation 41713. Up to 4246 conditions per place. [2024-06-14 12:35:15,391 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 295 selfloop transitions, 43 changer transitions 0/342 dead transitions. [2024-06-14 12:35:15,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 342 transitions, 3924 flow [2024-06-14 12:35:15,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:35:15,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:35:15,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-14 12:35:15,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875968992248062 [2024-06-14 12:35:15,392 INFO L175 Difference]: Start difference. First operand has 239 places, 313 transitions, 3060 flow. Second operand 9 states and 150 transitions. [2024-06-14 12:35:15,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 342 transitions, 3924 flow [2024-06-14 12:35:16,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 342 transitions, 3754 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-14 12:35:16,276 INFO L231 Difference]: Finished difference. Result has 242 places, 317 transitions, 3097 flow [2024-06-14 12:35:16,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2890, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3097, PETRI_PLACES=242, PETRI_TRANSITIONS=317} [2024-06-14 12:35:16,277 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 198 predicate places. [2024-06-14 12:35:16,277 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 317 transitions, 3097 flow [2024-06-14 12:35:16,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:16,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:16,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:16,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 12:35:16,278 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:35:16,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:16,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1980012488, now seen corresponding path program 1 times [2024-06-14 12:35:16,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:16,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086657583] [2024-06-14 12:35:16,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:16,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:16,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:17,131 INFO 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 12:35:17,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:17,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086657583] [2024-06-14 12:35:17,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086657583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:17,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:17,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:35:17,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75009639] [2024-06-14 12:35:17,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:17,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:35:17,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:17,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:35:17,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:35:17,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:35:17,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 317 transitions, 3097 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:17,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:17,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:35:17,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:18,146 INFO L124 PetriNetUnfolderBase]: 2861/4474 cut-off events. [2024-06-14 12:35:18,146 INFO L125 PetriNetUnfolderBase]: For 675540/675548 co-relation queries the response was YES. [2024-06-14 12:35:18,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42192 conditions, 4474 events. 2861/4474 cut-off events. For 675540/675548 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 24739 event pairs, 658 based on Foata normal form. 5/4475 useless extension candidates. Maximal degree in co-relation 42074. Up to 3748 conditions per place. [2024-06-14 12:35:18,199 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 245 selfloop transitions, 83 changer transitions 0/356 dead transitions. [2024-06-14 12:35:18,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 356 transitions, 4004 flow [2024-06-14 12:35:18,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:35:18,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:35:18,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 12:35:18,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-14 12:35:18,200 INFO L175 Difference]: Start difference. First operand has 242 places, 317 transitions, 3097 flow. Second operand 8 states and 150 transitions. [2024-06-14 12:35:18,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 356 transitions, 4004 flow [2024-06-14 12:35:19,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 356 transitions, 3825 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-14 12:35:19,204 INFO L231 Difference]: Finished difference. Result has 244 places, 330 transitions, 3279 flow [2024-06-14 12:35:19,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2918, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3279, PETRI_PLACES=244, PETRI_TRANSITIONS=330} [2024-06-14 12:35:19,204 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 200 predicate places. [2024-06-14 12:35:19,205 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 330 transitions, 3279 flow [2024-06-14 12:35:19,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:19,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:19,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:19,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 12:35:19,205 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:35:19,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:19,206 INFO L85 PathProgramCache]: Analyzing trace with hash -35045720, now seen corresponding path program 1 times [2024-06-14 12:35:19,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:19,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392068045] [2024-06-14 12:35:19,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:19,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:19,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:20,028 INFO 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 12:35:20,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:20,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392068045] [2024-06-14 12:35:20,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392068045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:20,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:20,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:35:20,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218271945] [2024-06-14 12:35:20,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:20,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:35:20,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:20,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:35:20,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:35:20,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:35:20,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 330 transitions, 3279 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:20,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:20,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:35:20,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:21,076 INFO L124 PetriNetUnfolderBase]: 2945/4564 cut-off events. [2024-06-14 12:35:21,076 INFO L125 PetriNetUnfolderBase]: For 684884/684892 co-relation queries the response was YES. [2024-06-14 12:35:21,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43806 conditions, 4564 events. 2945/4564 cut-off events. For 684884/684892 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 24945 event pairs, 677 based on Foata normal form. 6/4566 useless extension candidates. Maximal degree in co-relation 43686. Up to 4290 conditions per place. [2024-06-14 12:35:21,147 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 312 selfloop transitions, 39 changer transitions 0/355 dead transitions. [2024-06-14 12:35:21,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 355 transitions, 4119 flow [2024-06-14 12:35:21,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:35:21,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:35:21,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-14 12:35:21,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38953488372093026 [2024-06-14 12:35:21,150 INFO L175 Difference]: Start difference. First operand has 244 places, 330 transitions, 3279 flow. Second operand 8 states and 134 transitions. [2024-06-14 12:35:21,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 355 transitions, 4119 flow [2024-06-14 12:35:22,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 355 transitions, 3911 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-14 12:35:22,307 INFO L231 Difference]: Finished difference. Result has 248 places, 334 transitions, 3234 flow [2024-06-14 12:35:22,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3071, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3234, PETRI_PLACES=248, PETRI_TRANSITIONS=334} [2024-06-14 12:35:22,308 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 204 predicate places. [2024-06-14 12:35:22,308 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 334 transitions, 3234 flow [2024-06-14 12:35:22,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:22,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:22,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:22,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 12:35:22,309 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:35:22,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:22,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1979892518, now seen corresponding path program 2 times [2024-06-14 12:35:22,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:22,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594548721] [2024-06-14 12:35:22,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:22,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:22,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:23,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:23,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:23,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594548721] [2024-06-14 12:35:23,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594548721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:23,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:23,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:35:23,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29491305] [2024-06-14 12:35:23,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:23,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:35:23,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:23,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:35:23,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:35:23,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:35:23,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 334 transitions, 3234 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:23,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:23,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:35:23,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:24,124 INFO L124 PetriNetUnfolderBase]: 2907/4540 cut-off events. [2024-06-14 12:35:24,125 INFO L125 PetriNetUnfolderBase]: For 719324/719332 co-relation queries the response was YES. [2024-06-14 12:35:24,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43993 conditions, 4540 events. 2907/4540 cut-off events. For 719324/719332 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 25103 event pairs, 662 based on Foata normal form. 5/4541 useless extension candidates. Maximal degree in co-relation 43872. Up to 3766 conditions per place. [2024-06-14 12:35:24,184 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 245 selfloop transitions, 92 changer transitions 0/366 dead transitions. [2024-06-14 12:35:24,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 366 transitions, 4354 flow [2024-06-14 12:35:24,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:35:24,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:35:24,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 12:35:24,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-14 12:35:24,185 INFO L175 Difference]: Start difference. First operand has 248 places, 334 transitions, 3234 flow. Second operand 8 states and 151 transitions. [2024-06-14 12:35:24,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 366 transitions, 4354 flow [2024-06-14 12:35:25,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 366 transitions, 4239 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-14 12:35:25,526 INFO L231 Difference]: Finished difference. Result has 250 places, 342 transitions, 3518 flow [2024-06-14 12:35:25,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3119, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3518, PETRI_PLACES=250, PETRI_TRANSITIONS=342} [2024-06-14 12:35:25,527 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 206 predicate places. [2024-06-14 12:35:25,527 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 342 transitions, 3518 flow [2024-06-14 12:35:25,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:25,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:25,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:25,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 12:35:25,528 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:35:25,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:25,528 INFO L85 PathProgramCache]: Analyzing trace with hash 142322950, now seen corresponding path program 2 times [2024-06-14 12:35:25,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:25,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479740534] [2024-06-14 12:35:25,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:25,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:25,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:26,564 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 12:35:26,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:26,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479740534] [2024-06-14 12:35:26,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479740534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:26,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:26,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:35:26,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662114762] [2024-06-14 12:35:26,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:26,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:35:26,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:26,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:35:26,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:35:26,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:35:26,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 342 transitions, 3518 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:26,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:26,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:35:26,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:27,483 INFO L124 PetriNetUnfolderBase]: 2991/4627 cut-off events. [2024-06-14 12:35:27,483 INFO L125 PetriNetUnfolderBase]: For 732086/732094 co-relation queries the response was YES. [2024-06-14 12:35:27,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45406 conditions, 4627 events. 2991/4627 cut-off events. For 732086/732094 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 25266 event pairs, 680 based on Foata normal form. 6/4629 useless extension candidates. Maximal degree in co-relation 45284. Up to 4270 conditions per place. [2024-06-14 12:35:27,545 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 296 selfloop transitions, 64 changer transitions 0/364 dead transitions. [2024-06-14 12:35:27,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 364 transitions, 4536 flow [2024-06-14 12:35:27,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:35:27,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:35:27,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-14 12:35:27,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38953488372093026 [2024-06-14 12:35:27,546 INFO L175 Difference]: Start difference. First operand has 250 places, 342 transitions, 3518 flow. Second operand 8 states and 134 transitions. [2024-06-14 12:35:27,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 364 transitions, 4536 flow [2024-06-14 12:35:28,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 364 transitions, 4329 flow, removed 58 selfloop flow, removed 4 redundant places. [2024-06-14 12:35:28,686 INFO L231 Difference]: Finished difference. Result has 254 places, 346 transitions, 3529 flow [2024-06-14 12:35:28,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3311, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3529, PETRI_PLACES=254, PETRI_TRANSITIONS=346} [2024-06-14 12:35:28,687 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 210 predicate places. [2024-06-14 12:35:28,687 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 346 transitions, 3529 flow [2024-06-14 12:35:28,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:28,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:28,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:28,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 12:35:28,688 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:35:28,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:28,689 INFO L85 PathProgramCache]: Analyzing trace with hash 65349056, now seen corresponding path program 3 times [2024-06-14 12:35:28,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:28,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202319950] [2024-06-14 12:35:28,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:28,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:28,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:29,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:29,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:29,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202319950] [2024-06-14 12:35:29,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202319950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:29,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:29,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:35:29,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567059324] [2024-06-14 12:35:29,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:29,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:35:29,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:29,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:35:29,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:35:29,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:35:29,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 346 transitions, 3529 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:29,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:29,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:35:29,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:30,693 INFO L124 PetriNetUnfolderBase]: 2993/4630 cut-off events. [2024-06-14 12:35:30,693 INFO L125 PetriNetUnfolderBase]: For 742638/742646 co-relation queries the response was YES. [2024-06-14 12:35:30,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45471 conditions, 4630 events. 2993/4630 cut-off events. For 742638/742646 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 25280 event pairs, 680 based on Foata normal form. 6/4632 useless extension candidates. Maximal degree in co-relation 45347. Up to 4271 conditions per place. [2024-06-14 12:35:30,750 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 297 selfloop transitions, 66 changer transitions 0/367 dead transitions. [2024-06-14 12:35:30,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 367 transitions, 4548 flow [2024-06-14 12:35:30,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:35:30,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:35:30,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-14 12:35:30,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-14 12:35:30,755 INFO L175 Difference]: Start difference. First operand has 254 places, 346 transitions, 3529 flow. Second operand 8 states and 135 transitions. [2024-06-14 12:35:30,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 367 transitions, 4548 flow [2024-06-14 12:35:31,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 367 transitions, 4403 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-14 12:35:31,526 INFO L231 Difference]: Finished difference. Result has 257 places, 349 transitions, 3596 flow [2024-06-14 12:35:31,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3386, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3596, PETRI_PLACES=257, PETRI_TRANSITIONS=349} [2024-06-14 12:35:31,526 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 213 predicate places. [2024-06-14 12:35:31,527 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 349 transitions, 3596 flow [2024-06-14 12:35:31,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:31,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:31,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:31,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 12:35:31,527 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:35:31,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:31,528 INFO L85 PathProgramCache]: Analyzing trace with hash -10510230, now seen corresponding path program 3 times [2024-06-14 12:35:31,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:31,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695203405] [2024-06-14 12:35:31,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:31,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:31,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:32,416 INFO 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 12:35:32,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:32,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695203405] [2024-06-14 12:35:32,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695203405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:32,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:32,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:35:32,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281266998] [2024-06-14 12:35:32,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:32,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:35:32,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:32,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:35:32,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:35:32,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:35:32,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 349 transitions, 3596 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:32,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:32,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:35:32,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:33,437 INFO L124 PetriNetUnfolderBase]: 2971/4636 cut-off events. [2024-06-14 12:35:33,437 INFO L125 PetriNetUnfolderBase]: For 784873/784881 co-relation queries the response was YES. [2024-06-14 12:35:33,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46448 conditions, 4636 events. 2971/4636 cut-off events. For 784873/784881 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 25695 event pairs, 686 based on Foata normal form. 5/4637 useless extension candidates. Maximal degree in co-relation 46323. Up to 3719 conditions per place. [2024-06-14 12:35:33,497 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 249 selfloop transitions, 97 changer transitions 0/377 dead transitions. [2024-06-14 12:35:33,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 377 transitions, 4740 flow [2024-06-14 12:35:33,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:35:33,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:35:33,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 12:35:33,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-14 12:35:33,499 INFO L175 Difference]: Start difference. First operand has 257 places, 349 transitions, 3596 flow. Second operand 8 states and 147 transitions. [2024-06-14 12:35:33,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 377 transitions, 4740 flow [2024-06-14 12:35:34,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 377 transitions, 4602 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-14 12:35:34,685 INFO L231 Difference]: Finished difference. Result has 260 places, 356 transitions, 3847 flow [2024-06-14 12:35:34,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3458, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3847, PETRI_PLACES=260, PETRI_TRANSITIONS=356} [2024-06-14 12:35:34,685 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 216 predicate places. [2024-06-14 12:35:34,686 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 356 transitions, 3847 flow [2024-06-14 12:35:34,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:34,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:34,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:34,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 12:35:34,687 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:35:34,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:34,687 INFO L85 PathProgramCache]: Analyzing trace with hash -10633362, now seen corresponding path program 3 times [2024-06-14 12:35:34,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:34,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204956220] [2024-06-14 12:35:34,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:34,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:34,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:35,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:35,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:35,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204956220] [2024-06-14 12:35:35,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204956220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:35,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:35,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:35:35,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665065680] [2024-06-14 12:35:35,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:35,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:35:35,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:35,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:35:35,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:35:35,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:35:35,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 356 transitions, 3847 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:35,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:35,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:35:35,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:36,660 INFO L124 PetriNetUnfolderBase]: 2987/4656 cut-off events. [2024-06-14 12:35:36,660 INFO L125 PetriNetUnfolderBase]: For 809875/809883 co-relation queries the response was YES. [2024-06-14 12:35:36,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47697 conditions, 4656 events. 2987/4656 cut-off events. For 809875/809883 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 25789 event pairs, 681 based on Foata normal form. 8/4660 useless extension candidates. Maximal degree in co-relation 47571. Up to 4180 conditions per place. [2024-06-14 12:35:36,720 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 298 selfloop transitions, 48 changer transitions 0/377 dead transitions. [2024-06-14 12:35:36,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 377 transitions, 4713 flow [2024-06-14 12:35:36,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:35:36,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:35:36,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 12:35:36,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-14 12:35:36,721 INFO L175 Difference]: Start difference. First operand has 260 places, 356 transitions, 3847 flow. Second operand 8 states and 139 transitions. [2024-06-14 12:35:36,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 377 transitions, 4713 flow [2024-06-14 12:35:37,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 377 transitions, 4523 flow, removed 56 selfloop flow, removed 4 redundant places. [2024-06-14 12:35:37,865 INFO L231 Difference]: Finished difference. Result has 264 places, 359 transitions, 3885 flow [2024-06-14 12:35:37,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3657, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3885, PETRI_PLACES=264, PETRI_TRANSITIONS=359} [2024-06-14 12:35:37,866 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 220 predicate places. [2024-06-14 12:35:37,866 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 359 transitions, 3885 flow [2024-06-14 12:35:37,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:37,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:37,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:37,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 12:35:37,867 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:35:37,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:37,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1802873218, now seen corresponding path program 2 times [2024-06-14 12:35:37,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:37,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548323267] [2024-06-14 12:35:37,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:37,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:37,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:38,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:38,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:38,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548323267] [2024-06-14 12:35:38,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548323267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:38,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:38,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:35:38,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206878941] [2024-06-14 12:35:38,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:38,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:35:38,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:38,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:35:38,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:35:38,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:35:38,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 359 transitions, 3885 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:38,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:38,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:35:38,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:39,741 INFO L124 PetriNetUnfolderBase]: 3103/4790 cut-off events. [2024-06-14 12:35:39,741 INFO L125 PetriNetUnfolderBase]: For 833817/833825 co-relation queries the response was YES. [2024-06-14 12:35:39,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49387 conditions, 4790 events. 3103/4790 cut-off events. For 833817/833825 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 26221 event pairs, 685 based on Foata normal form. 6/4792 useless extension candidates. Maximal degree in co-relation 49259. Up to 4368 conditions per place. [2024-06-14 12:35:39,802 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 309 selfloop transitions, 78 changer transitions 0/391 dead transitions. [2024-06-14 12:35:39,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 391 transitions, 5421 flow [2024-06-14 12:35:39,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:35:39,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:35:39,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-14 12:35:39,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39018087855297157 [2024-06-14 12:35:39,803 INFO L175 Difference]: Start difference. First operand has 264 places, 359 transitions, 3885 flow. Second operand 9 states and 151 transitions. [2024-06-14 12:35:39,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 391 transitions, 5421 flow [2024-06-14 12:35:40,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 391 transitions, 5215 flow, removed 57 selfloop flow, removed 6 redundant places. [2024-06-14 12:35:40,799 INFO L231 Difference]: Finished difference. Result has 268 places, 371 transitions, 4256 flow [2024-06-14 12:35:40,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3679, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4256, PETRI_PLACES=268, PETRI_TRANSITIONS=371} [2024-06-14 12:35:40,800 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 224 predicate places. [2024-06-14 12:35:40,800 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 371 transitions, 4256 flow [2024-06-14 12:35:40,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:40,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:40,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:40,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 12:35:40,801 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:35:40,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:40,801 INFO L85 PathProgramCache]: Analyzing trace with hash -10276490, now seen corresponding path program 3 times [2024-06-14 12:35:40,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:40,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890475583] [2024-06-14 12:35:40,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:40,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:40,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:41,751 INFO 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 12:35:41,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:41,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890475583] [2024-06-14 12:35:41,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890475583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:41,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:41,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:35:41,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686236721] [2024-06-14 12:35:41,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:41,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:35:41,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:41,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:35:41,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:35:41,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:35:41,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 371 transitions, 4256 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:41,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:41,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:35:41,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:42,752 INFO L124 PetriNetUnfolderBase]: 3115/4811 cut-off events. [2024-06-14 12:35:42,752 INFO L125 PetriNetUnfolderBase]: For 856543/856551 co-relation queries the response was YES. [2024-06-14 12:35:42,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50284 conditions, 4811 events. 3115/4811 cut-off events. For 856543/856551 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 26377 event pairs, 685 based on Foata normal form. 6/4813 useless extension candidates. Maximal degree in co-relation 50154. Up to 4381 conditions per place. [2024-06-14 12:35:42,819 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 311 selfloop transitions, 80 changer transitions 0/395 dead transitions. [2024-06-14 12:35:42,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 395 transitions, 5581 flow [2024-06-14 12:35:42,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:35:42,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:35:42,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-14 12:35:42,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875968992248062 [2024-06-14 12:35:42,820 INFO L175 Difference]: Start difference. First operand has 268 places, 371 transitions, 4256 flow. Second operand 9 states and 150 transitions. [2024-06-14 12:35:42,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 395 transitions, 5581 flow [2024-06-14 12:35:44,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 395 transitions, 5372 flow, removed 88 selfloop flow, removed 4 redundant places. [2024-06-14 12:35:44,078 INFO L231 Difference]: Finished difference. Result has 273 places, 375 transitions, 4347 flow [2024-06-14 12:35:44,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4067, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4347, PETRI_PLACES=273, PETRI_TRANSITIONS=375} [2024-06-14 12:35:44,079 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 229 predicate places. [2024-06-14 12:35:44,079 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 375 transitions, 4347 flow [2024-06-14 12:35:44,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:44,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:44,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:44,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 12:35:44,080 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:35:44,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:44,080 INFO L85 PathProgramCache]: Analyzing trace with hash -10264400, now seen corresponding path program 4 times [2024-06-14 12:35:44,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:44,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709958967] [2024-06-14 12:35:44,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:44,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:44,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:45,025 INFO 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 12:35:45,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:45,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709958967] [2024-06-14 12:35:45,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709958967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:45,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:45,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:35:45,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986827972] [2024-06-14 12:35:45,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:45,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:35:45,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:45,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:35:45,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:35:45,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:35:45,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 375 transitions, 4347 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:45,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:45,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:35:45,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:46,132 INFO L124 PetriNetUnfolderBase]: 3111/4807 cut-off events. [2024-06-14 12:35:46,132 INFO L125 PetriNetUnfolderBase]: For 864448/864456 co-relation queries the response was YES. [2024-06-14 12:35:46,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50308 conditions, 4807 events. 3111/4807 cut-off events. For 864448/864456 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 26406 event pairs, 685 based on Foata normal form. 6/4809 useless extension candidates. Maximal degree in co-relation 50176. Up to 4379 conditions per place. [2024-06-14 12:35:46,194 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 311 selfloop transitions, 80 changer transitions 0/395 dead transitions. [2024-06-14 12:35:46,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 395 transitions, 5543 flow [2024-06-14 12:35:46,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:35:46,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:35:46,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-14 12:35:46,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3850129198966408 [2024-06-14 12:35:46,196 INFO L175 Difference]: Start difference. First operand has 273 places, 375 transitions, 4347 flow. Second operand 9 states and 149 transitions. [2024-06-14 12:35:46,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 395 transitions, 5543 flow [2024-06-14 12:35:47,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 395 transitions, 5222 flow, removed 96 selfloop flow, removed 6 redundant places. [2024-06-14 12:35:47,669 INFO L231 Difference]: Finished difference. Result has 276 places, 375 transitions, 4194 flow [2024-06-14 12:35:47,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4026, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4194, PETRI_PLACES=276, PETRI_TRANSITIONS=375} [2024-06-14 12:35:47,670 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 232 predicate places. [2024-06-14 12:35:47,670 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 375 transitions, 4194 flow [2024-06-14 12:35:47,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:47,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:47,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:47,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 12:35:47,671 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:35:47,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:47,671 INFO L85 PathProgramCache]: Analyzing trace with hash -939306724, now seen corresponding path program 1 times [2024-06-14 12:35:47,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:47,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953872822] [2024-06-14 12:35:47,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:47,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:47,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:48,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:48,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:48,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953872822] [2024-06-14 12:35:48,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953872822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:48,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:48,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:35:48,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590011361] [2024-06-14 12:35:48,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:48,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:35:48,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:48,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:35:48,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:35:48,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:35:48,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 375 transitions, 4194 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:48,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:48,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:35:48,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:49,781 INFO L124 PetriNetUnfolderBase]: 3116/4820 cut-off events. [2024-06-14 12:35:49,781 INFO L125 PetriNetUnfolderBase]: For 869096/869100 co-relation queries the response was YES. [2024-06-14 12:35:49,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50397 conditions, 4820 events. 3116/4820 cut-off events. For 869096/869100 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 26395 event pairs, 699 based on Foata normal form. 5/4822 useless extension candidates. Maximal degree in co-relation 50264. Up to 4651 conditions per place. [2024-06-14 12:35:49,839 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 371 selfloop transitions, 22 changer transitions 0/397 dead transitions. [2024-06-14 12:35:49,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 397 transitions, 5144 flow [2024-06-14 12:35:49,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:35:49,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:35:49,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-14 12:35:49,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35400516795865633 [2024-06-14 12:35:49,840 INFO L175 Difference]: Start difference. First operand has 276 places, 375 transitions, 4194 flow. Second operand 9 states and 137 transitions. [2024-06-14 12:35:49,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 397 transitions, 5144 flow [2024-06-14 12:35:51,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 397 transitions, 4977 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-14 12:35:51,038 INFO L231 Difference]: Finished difference. Result has 278 places, 378 transitions, 4187 flow [2024-06-14 12:35:51,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4027, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4187, PETRI_PLACES=278, PETRI_TRANSITIONS=378} [2024-06-14 12:35:51,038 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 234 predicate places. [2024-06-14 12:35:51,038 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 378 transitions, 4187 flow [2024-06-14 12:35:51,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:51,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:51,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:51,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 12:35:51,039 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:35:51,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:51,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1610466996, now seen corresponding path program 4 times [2024-06-14 12:35:51,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:51,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643919091] [2024-06-14 12:35:51,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:51,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:51,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:51,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:51,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:51,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643919091] [2024-06-14 12:35:51,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643919091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:51,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:51,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:35:51,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035044408] [2024-06-14 12:35:51,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:51,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:35:51,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:51,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:35:51,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:35:51,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:35:51,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 378 transitions, 4187 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:51,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:51,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:35:51,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:52,936 INFO L124 PetriNetUnfolderBase]: 3047/4736 cut-off events. [2024-06-14 12:35:52,936 INFO L125 PetriNetUnfolderBase]: For 895290/895295 co-relation queries the response was YES. [2024-06-14 12:35:52,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50428 conditions, 4736 events. 3047/4736 cut-off events. For 895290/895295 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 26196 event pairs, 674 based on Foata normal form. 2/4714 useless extension candidates. Maximal degree in co-relation 50294. Up to 4014 conditions per place. [2024-06-14 12:35:53,005 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 291 selfloop transitions, 87 changer transitions 0/409 dead transitions. [2024-06-14 12:35:53,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 409 transitions, 5151 flow [2024-06-14 12:35:53,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:35:53,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:35:53,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 12:35:53,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-14 12:35:53,006 INFO L175 Difference]: Start difference. First operand has 278 places, 378 transitions, 4187 flow. Second operand 8 states and 147 transitions. [2024-06-14 12:35:53,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 409 transitions, 5151 flow [2024-06-14 12:35:54,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 409 transitions, 5013 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-14 12:35:54,327 INFO L231 Difference]: Finished difference. Result has 280 places, 385 transitions, 4363 flow [2024-06-14 12:35:54,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4049, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4363, PETRI_PLACES=280, PETRI_TRANSITIONS=385} [2024-06-14 12:35:54,328 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 236 predicate places. [2024-06-14 12:35:54,328 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 385 transitions, 4363 flow [2024-06-14 12:35:54,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:54,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:54,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:54,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 12:35:54,329 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:35:54,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:54,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1610347026, now seen corresponding path program 5 times [2024-06-14 12:35:54,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:54,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854582024] [2024-06-14 12:35:54,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:54,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:54,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:55,153 INFO 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 12:35:55,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:55,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854582024] [2024-06-14 12:35:55,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854582024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:55,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:55,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:35:55,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183144742] [2024-06-14 12:35:55,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:55,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:35:55,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:55,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:35:55,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:35:55,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:35:55,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 385 transitions, 4363 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:55,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:55,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:35:55,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:56,354 INFO L124 PetriNetUnfolderBase]: 3057/4751 cut-off events. [2024-06-14 12:35:56,354 INFO L125 PetriNetUnfolderBase]: For 917551/917556 co-relation queries the response was YES. [2024-06-14 12:35:56,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51501 conditions, 4751 events. 3057/4751 cut-off events. For 917551/917556 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 26320 event pairs, 680 based on Foata normal form. 2/4729 useless extension candidates. Maximal degree in co-relation 51365. Up to 3998 conditions per place. [2024-06-14 12:35:56,449 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 289 selfloop transitions, 94 changer transitions 0/414 dead transitions. [2024-06-14 12:35:56,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 414 transitions, 5593 flow [2024-06-14 12:35:56,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:35:56,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:35:56,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 12:35:56,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-14 12:35:56,451 INFO L175 Difference]: Start difference. First operand has 280 places, 385 transitions, 4363 flow. Second operand 8 states and 147 transitions. [2024-06-14 12:35:56,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 414 transitions, 5593 flow [2024-06-14 12:35:57,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 414 transitions, 5365 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-14 12:35:57,916 INFO L231 Difference]: Finished difference. Result has 284 places, 391 transitions, 4523 flow [2024-06-14 12:35:57,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4135, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4523, PETRI_PLACES=284, PETRI_TRANSITIONS=391} [2024-06-14 12:35:57,916 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 240 predicate places. [2024-06-14 12:35:57,916 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 391 transitions, 4523 flow [2024-06-14 12:35:57,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:57,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:57,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:57,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 12:35:57,917 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:35:57,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:57,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1610346840, now seen corresponding path program 4 times [2024-06-14 12:35:57,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:57,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632143520] [2024-06-14 12:35:57,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:57,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:57,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:58,834 INFO 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 12:35:58,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:58,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632143520] [2024-06-14 12:35:58,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632143520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:58,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:58,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:35:58,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760886320] [2024-06-14 12:35:58,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:58,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:35:58,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:58,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:35:58,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:35:58,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:35:58,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 391 transitions, 4523 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:58,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:58,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:35:58,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:35:59,907 INFO L124 PetriNetUnfolderBase]: 3129/4825 cut-off events. [2024-06-14 12:35:59,907 INFO L125 PetriNetUnfolderBase]: For 924551/924556 co-relation queries the response was YES. [2024-06-14 12:35:59,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51916 conditions, 4825 events. 3129/4825 cut-off events. For 924551/924556 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 26375 event pairs, 706 based on Foata normal form. 1/4812 useless extension candidates. Maximal degree in co-relation 51779. Up to 4560 conditions per place. [2024-06-14 12:35:59,971 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 368 selfloop transitions, 38 changer transitions 0/410 dead transitions. [2024-06-14 12:35:59,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 410 transitions, 5399 flow [2024-06-14 12:35:59,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:35:59,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:35:59,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-14 12:35:59,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37790697674418605 [2024-06-14 12:35:59,973 INFO L175 Difference]: Start difference. First operand has 284 places, 391 transitions, 4523 flow. Second operand 8 states and 130 transitions. [2024-06-14 12:35:59,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 410 transitions, 5399 flow [2024-06-14 12:36:01,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 410 transitions, 5170 flow, removed 64 selfloop flow, removed 4 redundant places. [2024-06-14 12:36:01,376 INFO L231 Difference]: Finished difference. Result has 288 places, 391 transitions, 4376 flow [2024-06-14 12:36:01,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4294, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4376, PETRI_PLACES=288, PETRI_TRANSITIONS=391} [2024-06-14 12:36:01,377 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 244 predicate places. [2024-06-14 12:36:01,377 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 391 transitions, 4376 flow [2024-06-14 12:36:01,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:01,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:01,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:01,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 12:36:01,378 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:36:01,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:01,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1382565846, now seen corresponding path program 6 times [2024-06-14 12:36:01,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:01,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787037838] [2024-06-14 12:36:01,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:01,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:01,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:02,198 INFO 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 12:36:02,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:02,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787037838] [2024-06-14 12:36:02,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787037838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:02,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:02,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:36:02,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168305001] [2024-06-14 12:36:02,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:02,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:36:02,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:02,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:36:02,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:36:02,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:36:02,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 391 transitions, 4376 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:02,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:02,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:36:02,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:03,312 INFO L124 PetriNetUnfolderBase]: 3052/4742 cut-off events. [2024-06-14 12:36:03,312 INFO L125 PetriNetUnfolderBase]: For 944201/944206 co-relation queries the response was YES. [2024-06-14 12:36:03,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51551 conditions, 4742 events. 3052/4742 cut-off events. For 944201/944206 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 26253 event pairs, 668 based on Foata normal form. 2/4720 useless extension candidates. Maximal degree in co-relation 51412. Up to 4023 conditions per place. [2024-06-14 12:36:03,376 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 297 selfloop transitions, 94 changer transitions 0/422 dead transitions. [2024-06-14 12:36:03,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 422 transitions, 5369 flow [2024-06-14 12:36:03,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:36:03,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:36:03,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 12:36:03,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-14 12:36:03,378 INFO L175 Difference]: Start difference. First operand has 288 places, 391 transitions, 4376 flow. Second operand 8 states and 146 transitions. [2024-06-14 12:36:03,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 422 transitions, 5369 flow [2024-06-14 12:36:05,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 422 transitions, 5132 flow, removed 11 selfloop flow, removed 10 redundant places. [2024-06-14 12:36:05,287 INFO L231 Difference]: Finished difference. Result has 287 places, 398 transitions, 4468 flow [2024-06-14 12:36:05,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4139, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4468, PETRI_PLACES=287, PETRI_TRANSITIONS=398} [2024-06-14 12:36:05,287 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 243 predicate places. [2024-06-14 12:36:05,287 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 398 transitions, 4468 flow [2024-06-14 12:36:05,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:05,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:05,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:05,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 12:36:05,288 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:36:05,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:05,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1371138006, now seen corresponding path program 7 times [2024-06-14 12:36:05,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:05,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936529425] [2024-06-14 12:36:05,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:05,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:05,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:06,086 INFO 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 12:36:06,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:06,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936529425] [2024-06-14 12:36:06,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936529425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:06,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:06,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:36:06,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858399315] [2024-06-14 12:36:06,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:06,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:36:06,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:06,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:36:06,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:36:06,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:36:06,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 398 transitions, 4468 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:06,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:06,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:36:06,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:07,250 INFO L124 PetriNetUnfolderBase]: 3067/4757 cut-off events. [2024-06-14 12:36:07,251 INFO L125 PetriNetUnfolderBase]: For 970257/970264 co-relation queries the response was YES. [2024-06-14 12:36:07,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52575 conditions, 4757 events. 3067/4757 cut-off events. For 970257/970264 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 26330 event pairs, 668 based on Foata normal form. 2/4733 useless extension candidates. Maximal degree in co-relation 52434. Up to 4002 conditions per place. [2024-06-14 12:36:07,324 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 286 selfloop transitions, 106 changer transitions 0/423 dead transitions. [2024-06-14 12:36:07,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 423 transitions, 5446 flow [2024-06-14 12:36:07,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:36:07,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:36:07,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 12:36:07,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-14 12:36:07,326 INFO L175 Difference]: Start difference. First operand has 287 places, 398 transitions, 4468 flow. Second operand 8 states and 146 transitions. [2024-06-14 12:36:07,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 423 transitions, 5446 flow [2024-06-14 12:36:09,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 423 transitions, 5244 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-14 12:36:09,331 INFO L231 Difference]: Finished difference. Result has 291 places, 401 transitions, 4592 flow [2024-06-14 12:36:09,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4266, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4592, PETRI_PLACES=291, PETRI_TRANSITIONS=401} [2024-06-14 12:36:09,332 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 247 predicate places. [2024-06-14 12:36:09,332 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 401 transitions, 4592 flow [2024-06-14 12:36:09,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:09,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:09,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:09,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 12:36:09,333 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:36:09,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:09,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1256083986, now seen corresponding path program 8 times [2024-06-14 12:36:09,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:09,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292615031] [2024-06-14 12:36:09,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:09,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:09,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:10,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:10,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:10,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292615031] [2024-06-14 12:36:10,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292615031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:10,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:10,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:36:10,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348770003] [2024-06-14 12:36:10,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:10,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:36:10,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:10,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:36:10,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:36:10,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:36:10,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 401 transitions, 4592 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:10,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:10,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:36:10,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:11,438 INFO L124 PetriNetUnfolderBase]: 3091/4795 cut-off events. [2024-06-14 12:36:11,438 INFO L125 PetriNetUnfolderBase]: For 1003884/1003891 co-relation queries the response was YES. [2024-06-14 12:36:11,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53854 conditions, 4795 events. 3091/4795 cut-off events. For 1003884/1003891 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 26524 event pairs, 670 based on Foata normal form. 2/4768 useless extension candidates. Maximal degree in co-relation 53712. Up to 3941 conditions per place. [2024-06-14 12:36:11,524 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 263 selfloop transitions, 134 changer transitions 0/428 dead transitions. [2024-06-14 12:36:11,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 428 transitions, 6076 flow [2024-06-14 12:36:11,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:36:11,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:36:11,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 12:36:11,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-14 12:36:11,526 INFO L175 Difference]: Start difference. First operand has 291 places, 401 transitions, 4592 flow. Second operand 8 states and 147 transitions. [2024-06-14 12:36:11,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 428 transitions, 6076 flow [2024-06-14 12:36:13,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 428 transitions, 5772 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-14 12:36:13,607 INFO L231 Difference]: Finished difference. Result has 293 places, 407 transitions, 4784 flow [2024-06-14 12:36:13,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4288, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4784, PETRI_PLACES=293, PETRI_TRANSITIONS=407} [2024-06-14 12:36:13,612 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 249 predicate places. [2024-06-14 12:36:13,612 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 407 transitions, 4784 flow [2024-06-14 12:36:13,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:13,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:13,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:13,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 12:36:13,613 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:36:13,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:13,614 INFO L85 PathProgramCache]: Analyzing trace with hash 140770404, now seen corresponding path program 5 times [2024-06-14 12:36:13,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:13,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599598800] [2024-06-14 12:36:13,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:13,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:13,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:14,539 INFO 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 12:36:14,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:14,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599598800] [2024-06-14 12:36:14,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599598800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:14,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:14,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:36:14,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496625980] [2024-06-14 12:36:14,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:14,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:36:14,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:14,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:36:14,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:36:14,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:36:14,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 407 transitions, 4784 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:14,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:14,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:36:14,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:15,729 INFO L124 PetriNetUnfolderBase]: 3180/4908 cut-off events. [2024-06-14 12:36:15,729 INFO L125 PetriNetUnfolderBase]: For 1018011/1018016 co-relation queries the response was YES. [2024-06-14 12:36:15,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54765 conditions, 4908 events. 3180/4908 cut-off events. For 1018011/1018016 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 26968 event pairs, 672 based on Foata normal form. 1/4895 useless extension candidates. Maximal degree in co-relation 54622. Up to 4595 conditions per place. [2024-06-14 12:36:15,791 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 369 selfloop transitions, 57 changer transitions 0/430 dead transitions. [2024-06-14 12:36:15,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 430 transitions, 6006 flow [2024-06-14 12:36:15,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:36:15,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:36:15,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 12:36:15,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-14 12:36:15,792 INFO L175 Difference]: Start difference. First operand has 293 places, 407 transitions, 4784 flow. Second operand 8 states and 132 transitions. [2024-06-14 12:36:15,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 430 transitions, 6006 flow [2024-06-14 12:36:17,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 430 transitions, 5709 flow, removed 68 selfloop flow, removed 4 redundant places. [2024-06-14 12:36:17,642 INFO L231 Difference]: Finished difference. Result has 298 places, 413 transitions, 4749 flow [2024-06-14 12:36:17,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4487, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4749, PETRI_PLACES=298, PETRI_TRANSITIONS=413} [2024-06-14 12:36:17,643 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 254 predicate places. [2024-06-14 12:36:17,643 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 413 transitions, 4749 flow [2024-06-14 12:36:17,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:17,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:17,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:17,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 12:36:17,643 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:36:17,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:17,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1600157760, now seen corresponding path program 6 times [2024-06-14 12:36:17,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:17,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631808875] [2024-06-14 12:36:17,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:17,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:17,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:18,491 INFO 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 12:36:18,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:18,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631808875] [2024-06-14 12:36:18,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631808875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:18,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:18,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:36:18,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601063375] [2024-06-14 12:36:18,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:18,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:36:18,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:18,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:36:18,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:36:18,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:36:18,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 413 transitions, 4749 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:18,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:18,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:36:18,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:19,767 INFO L124 PetriNetUnfolderBase]: 3177/4899 cut-off events. [2024-06-14 12:36:19,767 INFO L125 PetriNetUnfolderBase]: For 1029253/1029258 co-relation queries the response was YES. [2024-06-14 12:36:19,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54668 conditions, 4899 events. 3177/4899 cut-off events. For 1029253/1029258 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 26860 event pairs, 685 based on Foata normal form. 1/4886 useless extension candidates. Maximal degree in co-relation 54522. Up to 4592 conditions per place. [2024-06-14 12:36:19,829 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 366 selfloop transitions, 59 changer transitions 0/429 dead transitions. [2024-06-14 12:36:19,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 429 transitions, 5651 flow [2024-06-14 12:36:19,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:36:19,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:36:19,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 12:36:19,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3808139534883721 [2024-06-14 12:36:19,831 INFO L175 Difference]: Start difference. First operand has 298 places, 413 transitions, 4749 flow. Second operand 8 states and 131 transitions. [2024-06-14 12:36:19,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 429 transitions, 5651 flow [2024-06-14 12:36:21,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 429 transitions, 5465 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-14 12:36:21,699 INFO L231 Difference]: Finished difference. Result has 301 places, 413 transitions, 4687 flow [2024-06-14 12:36:21,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4563, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4687, PETRI_PLACES=301, PETRI_TRANSITIONS=413} [2024-06-14 12:36:21,700 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 257 predicate places. [2024-06-14 12:36:21,700 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 413 transitions, 4687 flow [2024-06-14 12:36:21,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:21,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:21,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:21,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 12:36:21,700 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:36:21,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:21,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1996371672, now seen corresponding path program 9 times [2024-06-14 12:36:21,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:21,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775481396] [2024-06-14 12:36:21,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:21,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:21,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:22,682 INFO 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 12:36:22,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:22,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775481396] [2024-06-14 12:36:22,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775481396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:22,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:22,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:36:22,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658127430] [2024-06-14 12:36:22,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:22,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:36:22,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:22,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:36:22,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:36:22,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:36:22,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 413 transitions, 4687 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:22,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:22,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:36:22,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:23,842 INFO L124 PetriNetUnfolderBase]: 3103/4812 cut-off events. [2024-06-14 12:36:23,842 INFO L125 PetriNetUnfolderBase]: For 1059252/1059259 co-relation queries the response was YES. [2024-06-14 12:36:23,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54540 conditions, 4812 events. 3103/4812 cut-off events. For 1059252/1059259 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 26612 event pairs, 671 based on Foata normal form. 2/4785 useless extension candidates. Maximal degree in co-relation 54393. Up to 3955 conditions per place. [2024-06-14 12:36:23,918 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 266 selfloop transitions, 137 changer transitions 0/436 dead transitions. [2024-06-14 12:36:23,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 436 transitions, 5859 flow [2024-06-14 12:36:23,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:36:23,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:36:23,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 12:36:23,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-14 12:36:23,919 INFO L175 Difference]: Start difference. First operand has 301 places, 413 transitions, 4687 flow. Second operand 8 states and 147 transitions. [2024-06-14 12:36:23,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 436 transitions, 5859 flow [2024-06-14 12:36:26,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 436 transitions, 5737 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 12:36:26,385 INFO L231 Difference]: Finished difference. Result has 302 places, 416 transitions, 4925 flow [2024-06-14 12:36:26,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4565, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4925, PETRI_PLACES=302, PETRI_TRANSITIONS=416} [2024-06-14 12:36:26,386 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 258 predicate places. [2024-06-14 12:36:26,386 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 416 transitions, 4925 flow [2024-06-14 12:36:26,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:26,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:26,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:26,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 12:36:26,393 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:36:26,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:26,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1090444852, now seen corresponding path program 10 times [2024-06-14 12:36:26,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:26,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773379968] [2024-06-14 12:36:26,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:26,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:26,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:27,278 INFO 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 12:36:27,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:27,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773379968] [2024-06-14 12:36:27,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773379968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:27,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:27,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:36:27,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876593539] [2024-06-14 12:36:27,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:27,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:36:27,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:27,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:36:27,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:36:27,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:36:27,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 416 transitions, 4925 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:27,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:27,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:36:27,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:28,433 INFO L124 PetriNetUnfolderBase]: 3145/4889 cut-off events. [2024-06-14 12:36:28,433 INFO L125 PetriNetUnfolderBase]: For 1104066/1104079 co-relation queries the response was YES. [2024-06-14 12:36:28,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56366 conditions, 4889 events. 3145/4889 cut-off events. For 1104066/1104079 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 27196 event pairs, 749 based on Foata normal form. 3/4870 useless extension candidates. Maximal degree in co-relation 56218. Up to 3796 conditions per place. [2024-06-14 12:36:28,509 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 264 selfloop transitions, 151 changer transitions 0/448 dead transitions. [2024-06-14 12:36:28,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 448 transitions, 6899 flow [2024-06-14 12:36:28,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:36:28,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:36:28,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 12:36:28,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-14 12:36:28,510 INFO L175 Difference]: Start difference. First operand has 302 places, 416 transitions, 4925 flow. Second operand 8 states and 146 transitions. [2024-06-14 12:36:28,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 448 transitions, 6899 flow [2024-06-14 12:36:30,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 448 transitions, 6622 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-14 12:36:30,671 INFO L231 Difference]: Finished difference. Result has 305 places, 429 transitions, 5422 flow [2024-06-14 12:36:30,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4648, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5422, PETRI_PLACES=305, PETRI_TRANSITIONS=429} [2024-06-14 12:36:30,684 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 261 predicate places. [2024-06-14 12:36:30,686 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 429 transitions, 5422 flow [2024-06-14 12:36:30,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:30,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:30,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:30,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 12:36:30,687 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:36:30,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:30,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1220443962, now seen corresponding path program 7 times [2024-06-14 12:36:30,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:30,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520200103] [2024-06-14 12:36:30,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:30,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:30,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:31,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:31,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:31,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520200103] [2024-06-14 12:36:31,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520200103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:31,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:31,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:36:31,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13315426] [2024-06-14 12:36:31,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:31,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:36:31,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:31,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:36:31,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:36:31,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:36:31,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 429 transitions, 5422 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:31,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:31,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:36:31,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:32,886 INFO L124 PetriNetUnfolderBase]: 3234/4980 cut-off events. [2024-06-14 12:36:32,886 INFO L125 PetriNetUnfolderBase]: For 1121958/1121969 co-relation queries the response was YES. [2024-06-14 12:36:32,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57525 conditions, 4980 events. 3234/4980 cut-off events. For 1121958/1121969 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 27249 event pairs, 713 based on Foata normal form. 5/4970 useless extension candidates. Maximal degree in co-relation 57376. Up to 4492 conditions per place. [2024-06-14 12:36:32,962 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 323 selfloop transitions, 122 changer transitions 0/449 dead transitions. [2024-06-14 12:36:32,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 449 transitions, 6890 flow [2024-06-14 12:36:32,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:36:32,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:36:32,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 12:36:32,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-14 12:36:32,963 INFO L175 Difference]: Start difference. First operand has 305 places, 429 transitions, 5422 flow. Second operand 8 states and 132 transitions. [2024-06-14 12:36:32,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 449 transitions, 6890 flow [2024-06-14 12:36:35,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 449 transitions, 6609 flow, removed 107 selfloop flow, removed 2 redundant places. [2024-06-14 12:36:35,467 INFO L231 Difference]: Finished difference. Result has 311 places, 435 transitions, 5525 flow [2024-06-14 12:36:35,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5141, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5525, PETRI_PLACES=311, PETRI_TRANSITIONS=435} [2024-06-14 12:36:35,468 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 267 predicate places. [2024-06-14 12:36:35,468 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 435 transitions, 5525 flow [2024-06-14 12:36:35,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:35,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:35,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:35,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 12:36:35,468 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:36:35,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:35,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1286450856, now seen corresponding path program 8 times [2024-06-14 12:36:35,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:35,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710389011] [2024-06-14 12:36:35,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:35,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:35,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:36,426 INFO 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 12:36:36,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:36,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710389011] [2024-06-14 12:36:36,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710389011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:36,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:36,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:36:36,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075198267] [2024-06-14 12:36:36,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:36,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:36:36,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:36,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:36:36,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:36:36,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:36:36,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 435 transitions, 5525 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:36,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:36,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:36:36,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:37,600 INFO L124 PetriNetUnfolderBase]: 3244/4992 cut-off events. [2024-06-14 12:36:37,600 INFO L125 PetriNetUnfolderBase]: For 1126833/1126844 co-relation queries the response was YES. [2024-06-14 12:36:37,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56410 conditions, 4992 events. 3244/4992 cut-off events. For 1126833/1126844 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 27291 event pairs, 712 based on Foata normal form. 6/4983 useless extension candidates. Maximal degree in co-relation 56259. Up to 4502 conditions per place. [2024-06-14 12:36:37,699 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 334 selfloop transitions, 115 changer transitions 0/453 dead transitions. [2024-06-14 12:36:37,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 453 transitions, 6956 flow [2024-06-14 12:36:37,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:36:37,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:36:37,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-14 12:36:37,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38953488372093026 [2024-06-14 12:36:37,700 INFO L175 Difference]: Start difference. First operand has 311 places, 435 transitions, 5525 flow. Second operand 8 states and 134 transitions. [2024-06-14 12:36:37,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 453 transitions, 6956 flow [2024-06-14 12:36:39,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 453 transitions, 6669 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-14 12:36:39,974 INFO L231 Difference]: Finished difference. Result has 314 places, 439 transitions, 5560 flow [2024-06-14 12:36:39,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5248, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5560, PETRI_PLACES=314, PETRI_TRANSITIONS=439} [2024-06-14 12:36:39,975 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 270 predicate places. [2024-06-14 12:36:39,975 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 439 transitions, 5560 flow [2024-06-14 12:36:39,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:39,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:39,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:39,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 12:36:39,976 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:36:39,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:39,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1286450670, now seen corresponding path program 11 times [2024-06-14 12:36:39,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:39,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806766589] [2024-06-14 12:36:39,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:39,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:39,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:41,043 INFO 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 12:36:41,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:41,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806766589] [2024-06-14 12:36:41,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806766589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:41,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:41,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:36:41,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527355756] [2024-06-14 12:36:41,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:41,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:36:41,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:41,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:36:41,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:36:41,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:36:41,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 439 transitions, 5560 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:41,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:41,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:36:41,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:42,185 INFO L124 PetriNetUnfolderBase]: 3153/4898 cut-off events. [2024-06-14 12:36:42,186 INFO L125 PetriNetUnfolderBase]: For 1146190/1146203 co-relation queries the response was YES. [2024-06-14 12:36:42,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55705 conditions, 4898 events. 3153/4898 cut-off events. For 1146190/1146203 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 27218 event pairs, 742 based on Foata normal form. 5/4881 useless extension candidates. Maximal degree in co-relation 55554. Up to 3808 conditions per place. [2024-06-14 12:36:42,259 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 273 selfloop transitions, 147 changer transitions 0/456 dead transitions. [2024-06-14 12:36:42,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 456 transitions, 6886 flow [2024-06-14 12:36:42,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:36:42,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:36:42,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 12:36:42,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-14 12:36:42,260 INFO L175 Difference]: Start difference. First operand has 314 places, 439 transitions, 5560 flow. Second operand 8 states and 145 transitions. [2024-06-14 12:36:42,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 456 transitions, 6886 flow [2024-06-14 12:36:44,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 456 transitions, 6473 flow, removed 55 selfloop flow, removed 7 redundant places. [2024-06-14 12:36:44,376 INFO L231 Difference]: Finished difference. Result has 315 places, 439 transitions, 5448 flow [2024-06-14 12:36:44,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5147, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5448, PETRI_PLACES=315, PETRI_TRANSITIONS=439} [2024-06-14 12:36:44,376 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 271 predicate places. [2024-06-14 12:36:44,376 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 439 transitions, 5448 flow [2024-06-14 12:36:44,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:44,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:44,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:44,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 12:36:44,377 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:36:44,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:44,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1286688006, now seen corresponding path program 9 times [2024-06-14 12:36:44,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:44,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596622037] [2024-06-14 12:36:44,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:44,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:44,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:45,396 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 12:36:45,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:45,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596622037] [2024-06-14 12:36:45,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596622037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:45,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:45,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:36:45,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688996175] [2024-06-14 12:36:45,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:45,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:36:45,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:45,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:36:45,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:36:45,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:36:45,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 439 transitions, 5448 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:45,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:45,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:36:45,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:46,495 INFO L124 PetriNetUnfolderBase]: 3224/4964 cut-off events. [2024-06-14 12:36:46,495 INFO L125 PetriNetUnfolderBase]: For 1134100/1134111 co-relation queries the response was YES. [2024-06-14 12:36:46,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55776 conditions, 4964 events. 3224/4964 cut-off events. For 1134100/1134111 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 27177 event pairs, 710 based on Foata normal form. 6/4955 useless extension candidates. Maximal degree in co-relation 55624. Up to 4478 conditions per place. [2024-06-14 12:36:46,570 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 336 selfloop transitions, 112 changer transitions 0/452 dead transitions. [2024-06-14 12:36:46,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 452 transitions, 6590 flow [2024-06-14 12:36:46,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:36:46,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:36:46,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 12:36:46,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3866279069767442 [2024-06-14 12:36:46,572 INFO L175 Difference]: Start difference. First operand has 315 places, 439 transitions, 5448 flow. Second operand 8 states and 133 transitions. [2024-06-14 12:36:46,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 452 transitions, 6590 flow [2024-06-14 12:36:49,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 452 transitions, 6150 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-14 12:36:49,089 INFO L231 Difference]: Finished difference. Result has 316 places, 439 transitions, 5241 flow [2024-06-14 12:36:49,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5008, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5241, PETRI_PLACES=316, PETRI_TRANSITIONS=439} [2024-06-14 12:36:49,089 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 272 predicate places. [2024-06-14 12:36:49,089 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 439 transitions, 5241 flow [2024-06-14 12:36:49,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:49,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:49,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:49,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 12:36:49,090 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:36:49,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:49,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1824297682, now seen corresponding path program 10 times [2024-06-14 12:36:49,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:49,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104354137] [2024-06-14 12:36:49,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:49,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:49,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:50,048 INFO 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 12:36:50,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:50,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104354137] [2024-06-14 12:36:50,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104354137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:50,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:50,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:36:50,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750617581] [2024-06-14 12:36:50,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:50,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:36:50,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:50,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:36:50,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:36:50,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:36:50,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 439 transitions, 5241 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:50,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:50,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:36:50,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:51,202 INFO L124 PetriNetUnfolderBase]: 3229/4971 cut-off events. [2024-06-14 12:36:51,203 INFO L125 PetriNetUnfolderBase]: For 1147833/1147844 co-relation queries the response was YES. [2024-06-14 12:36:51,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55347 conditions, 4971 events. 3229/4971 cut-off events. For 1147833/1147844 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 27231 event pairs, 710 based on Foata normal form. 5/4961 useless extension candidates. Maximal degree in co-relation 55195. Up to 4482 conditions per place. [2024-06-14 12:36:51,272 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 325 selfloop transitions, 127 changer transitions 0/456 dead transitions. [2024-06-14 12:36:51,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 456 transitions, 6664 flow [2024-06-14 12:36:51,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:36:51,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:36:51,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 12:36:51,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-14 12:36:51,273 INFO L175 Difference]: Start difference. First operand has 316 places, 439 transitions, 5241 flow. Second operand 8 states and 132 transitions. [2024-06-14 12:36:51,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 456 transitions, 6664 flow [2024-06-14 12:36:53,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 456 transitions, 6412 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 12:36:53,612 INFO L231 Difference]: Finished difference. Result has 317 places, 442 transitions, 5310 flow [2024-06-14 12:36:53,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4993, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5310, PETRI_PLACES=317, PETRI_TRANSITIONS=442} [2024-06-14 12:36:53,612 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 273 predicate places. [2024-06-14 12:36:53,612 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 442 transitions, 5310 flow [2024-06-14 12:36:53,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:53,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:53,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:53,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 12:36:53,613 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:36:53,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:53,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1220206998, now seen corresponding path program 12 times [2024-06-14 12:36:53,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:53,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921193218] [2024-06-14 12:36:53,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:53,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:53,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:54,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:36:54,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:54,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921193218] [2024-06-14 12:36:54,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921193218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:54,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:54,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:36:54,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890062916] [2024-06-14 12:36:54,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:54,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:36:54,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:54,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:36:54,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:36:54,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:36:54,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 442 transitions, 5310 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:54,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:54,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:36:54,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:55,627 INFO L124 PetriNetUnfolderBase]: 3145/4888 cut-off events. [2024-06-14 12:36:55,627 INFO L125 PetriNetUnfolderBase]: For 1172968/1172981 co-relation queries the response was YES. [2024-06-14 12:36:55,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55067 conditions, 4888 events. 3145/4888 cut-off events. For 1172968/1172981 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 27175 event pairs, 746 based on Foata normal form. 3/4869 useless extension candidates. Maximal degree in co-relation 54914. Up to 3803 conditions per place. [2024-06-14 12:36:55,714 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 268 selfloop transitions, 153 changer transitions 0/458 dead transitions. [2024-06-14 12:36:55,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 458 transitions, 6436 flow [2024-06-14 12:36:55,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:36:55,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:36:55,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 12:36:55,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-14 12:36:55,716 INFO L175 Difference]: Start difference. First operand has 317 places, 442 transitions, 5310 flow. Second operand 8 states and 143 transitions. [2024-06-14 12:36:55,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 458 transitions, 6436 flow [2024-06-14 12:36:57,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 458 transitions, 6184 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-06-14 12:36:57,854 INFO L231 Difference]: Finished difference. Result has 321 places, 442 transitions, 5370 flow [2024-06-14 12:36:57,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5058, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5370, PETRI_PLACES=321, PETRI_TRANSITIONS=442} [2024-06-14 12:36:57,854 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 277 predicate places. [2024-06-14 12:36:57,854 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 442 transitions, 5370 flow [2024-06-14 12:36:57,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:57,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:36:57,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:36:57,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 12:36:57,855 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:36:57,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:36:57,855 INFO L85 PathProgramCache]: Analyzing trace with hash -997841022, now seen corresponding path program 11 times [2024-06-14 12:36:57,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:36:57,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108656799] [2024-06-14 12:36:57,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:36:57,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:36:57,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:36:58,803 INFO 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 12:36:58,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:36:58,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108656799] [2024-06-14 12:36:58,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108656799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:36:58,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:36:58,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:36:58,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33687872] [2024-06-14 12:36:58,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:36:58,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:36:58,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:36:58,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:36:58,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:36:58,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:36:58,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 442 transitions, 5370 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:36:58,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:36:58,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:36:58,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:36:59,928 INFO L124 PetriNetUnfolderBase]: 3217/4955 cut-off events. [2024-06-14 12:36:59,928 INFO L125 PetriNetUnfolderBase]: For 1172522/1172533 co-relation queries the response was YES. [2024-06-14 12:36:59,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55312 conditions, 4955 events. 3217/4955 cut-off events. For 1172522/1172533 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 27144 event pairs, 709 based on Foata normal form. 6/4946 useless extension candidates. Maximal degree in co-relation 55158. Up to 4469 conditions per place. [2024-06-14 12:37:00,006 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 332 selfloop transitions, 119 changer transitions 0/455 dead transitions. [2024-06-14 12:37:00,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 455 transitions, 6524 flow [2024-06-14 12:37:00,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:37:00,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:37:00,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 12:37:00,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-14 12:37:00,007 INFO L175 Difference]: Start difference. First operand has 321 places, 442 transitions, 5370 flow. Second operand 8 states and 132 transitions. [2024-06-14 12:37:00,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 455 transitions, 6524 flow [2024-06-14 12:37:02,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 455 transitions, 6170 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-14 12:37:02,100 INFO L231 Difference]: Finished difference. Result has 322 places, 442 transitions, 5262 flow [2024-06-14 12:37:02,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5016, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5262, PETRI_PLACES=322, PETRI_TRANSITIONS=442} [2024-06-14 12:37:02,100 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 278 predicate places. [2024-06-14 12:37:02,100 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 442 transitions, 5262 flow [2024-06-14 12:37:02,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:02,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:37:02,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:37:02,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 12:37:02,101 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:37:02,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:37:02,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1220028252, now seen corresponding path program 12 times [2024-06-14 12:37:02,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:37:02,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513364496] [2024-06-14 12:37:02,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:37:02,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:37:02,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:37:02,986 INFO 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 12:37:02,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:37:02,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513364496] [2024-06-14 12:37:02,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513364496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:37:02,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:37:02,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:37:02,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127669247] [2024-06-14 12:37:02,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:37:02,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:37:02,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:37:02,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:37:02,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:37:03,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:37:03,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 442 transitions, 5262 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:03,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:37:03,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:37:03,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:37:04,035 INFO L124 PetriNetUnfolderBase]: 3212/4947 cut-off events. [2024-06-14 12:37:04,036 INFO L125 PetriNetUnfolderBase]: For 1180574/1180585 co-relation queries the response was YES. [2024-06-14 12:37:04,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55086 conditions, 4947 events. 3212/4947 cut-off events. For 1180574/1180585 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 27059 event pairs, 709 based on Foata normal form. 5/4937 useless extension candidates. Maximal degree in co-relation 54931. Up to 4464 conditions per place. [2024-06-14 12:37:04,116 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 320 selfloop transitions, 130 changer transitions 0/454 dead transitions. [2024-06-14 12:37:04,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 454 transitions, 6198 flow [2024-06-14 12:37:04,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:37:04,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:37:04,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 12:37:04,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3808139534883721 [2024-06-14 12:37:04,117 INFO L175 Difference]: Start difference. First operand has 322 places, 442 transitions, 5262 flow. Second operand 8 states and 131 transitions. [2024-06-14 12:37:04,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 454 transitions, 6198 flow [2024-06-14 12:37:06,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 454 transitions, 5903 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-14 12:37:06,457 INFO L231 Difference]: Finished difference. Result has 323 places, 442 transitions, 5233 flow [2024-06-14 12:37:06,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4967, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5233, PETRI_PLACES=323, PETRI_TRANSITIONS=442} [2024-06-14 12:37:06,458 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 279 predicate places. [2024-06-14 12:37:06,458 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 442 transitions, 5233 flow [2024-06-14 12:37:06,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:06,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:37:06,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:37:06,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 12:37:06,459 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:37:06,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:37:06,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1286327538, now seen corresponding path program 4 times [2024-06-14 12:37:06,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:37:06,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513187958] [2024-06-14 12:37:06,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:37:06,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:37:06,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:37:07,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:37:07,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:37:07,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513187958] [2024-06-14 12:37:07,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513187958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:37:07,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:37:07,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:37:07,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779809945] [2024-06-14 12:37:07,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:37:07,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:37:07,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:37:07,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:37:07,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:37:07,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:37:07,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 442 transitions, 5233 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:07,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:37:07,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:37:07,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:37:08,615 INFO L124 PetriNetUnfolderBase]: 3136/4873 cut-off events. [2024-06-14 12:37:08,616 INFO L125 PetriNetUnfolderBase]: For 1212436/1212447 co-relation queries the response was YES. [2024-06-14 12:37:08,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54719 conditions, 4873 events. 3136/4873 cut-off events. For 1212436/1212447 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 27006 event pairs, 682 based on Foata normal form. 8/4866 useless extension candidates. Maximal degree in co-relation 54563. Up to 4352 conditions per place. [2024-06-14 12:37:08,691 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 356 selfloop transitions, 65 changer transitions 0/458 dead transitions. [2024-06-14 12:37:08,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 458 transitions, 6245 flow [2024-06-14 12:37:08,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:37:08,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:37:08,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-14 12:37:08,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 12:37:08,692 INFO L175 Difference]: Start difference. First operand has 323 places, 442 transitions, 5233 flow. Second operand 8 states and 136 transitions. [2024-06-14 12:37:08,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 458 transitions, 6245 flow [2024-06-14 12:37:11,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 458 transitions, 5865 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-14 12:37:11,284 INFO L231 Difference]: Finished difference. Result has 321 places, 445 transitions, 5127 flow [2024-06-14 12:37:11,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4853, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5127, PETRI_PLACES=321, PETRI_TRANSITIONS=445} [2024-06-14 12:37:11,284 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 277 predicate places. [2024-06-14 12:37:11,285 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 445 transitions, 5127 flow [2024-06-14 12:37:11,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:11,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:37:11,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:37:11,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 12:37:11,285 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:37:11,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:37:11,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1286696934, now seen corresponding path program 2 times [2024-06-14 12:37:11,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:37:11,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588240136] [2024-06-14 12:37:11,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:37:11,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:37:11,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:37:12,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:37:12,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:37:12,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588240136] [2024-06-14 12:37:12,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588240136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:37:12,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:37:12,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:37:12,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450199113] [2024-06-14 12:37:12,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:37:12,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:37:12,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:37:12,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:37:12,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:37:12,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:37:12,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 445 transitions, 5127 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:12,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:37:12,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:37:12,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:37:13,618 INFO L124 PetriNetUnfolderBase]: 3220/4974 cut-off events. [2024-06-14 12:37:13,618 INFO L125 PetriNetUnfolderBase]: For 1211965/1211977 co-relation queries the response was YES. [2024-06-14 12:37:13,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55401 conditions, 4974 events. 3220/4974 cut-off events. For 1211965/1211977 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 27369 event pairs, 690 based on Foata normal form. 9/4976 useless extension candidates. Maximal degree in co-relation 55244. Up to 4757 conditions per place. [2024-06-14 12:37:13,686 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 414 selfloop transitions, 48 changer transitions 0/466 dead transitions. [2024-06-14 12:37:13,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 466 transitions, 6545 flow [2024-06-14 12:37:13,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:37:13,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:37:13,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-14 12:37:13,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36175710594315247 [2024-06-14 12:37:13,688 INFO L175 Difference]: Start difference. First operand has 321 places, 445 transitions, 5127 flow. Second operand 9 states and 140 transitions. [2024-06-14 12:37:13,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 466 transitions, 6545 flow [2024-06-14 12:37:16,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 466 transitions, 6293 flow, removed 63 selfloop flow, removed 6 redundant places. [2024-06-14 12:37:16,913 INFO L231 Difference]: Finished difference. Result has 324 places, 451 transitions, 5211 flow [2024-06-14 12:37:16,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4875, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5211, PETRI_PLACES=324, PETRI_TRANSITIONS=451} [2024-06-14 12:37:16,914 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 280 predicate places. [2024-06-14 12:37:16,914 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 451 transitions, 5211 flow [2024-06-14 12:37:16,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:16,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:37:16,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:37:16,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 12:37:16,915 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:37:16,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:37:16,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1397329838, now seen corresponding path program 5 times [2024-06-14 12:37:16,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:37:16,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067413015] [2024-06-14 12:37:16,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:37:16,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:37:16,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:37:17,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:37:17,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:37:17,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067413015] [2024-06-14 12:37:17,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067413015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:37:17,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:37:17,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:37:17,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605407612] [2024-06-14 12:37:17,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:37:17,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:37:17,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:37:17,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:37:17,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:37:17,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:37:17,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 451 transitions, 5211 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:17,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:37:17,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:37:17,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:37:19,002 INFO L124 PetriNetUnfolderBase]: 3256/5016 cut-off events. [2024-06-14 12:37:19,002 INFO L125 PetriNetUnfolderBase]: For 1259848/1259859 co-relation queries the response was YES. [2024-06-14 12:37:19,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56416 conditions, 5016 events. 3256/5016 cut-off events. For 1259848/1259859 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 27585 event pairs, 707 based on Foata normal form. 6/5007 useless extension candidates. Maximal degree in co-relation 56258. Up to 4364 conditions per place. [2024-06-14 12:37:19,080 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 352 selfloop transitions, 134 changer transitions 0/490 dead transitions. [2024-06-14 12:37:19,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 490 transitions, 7449 flow [2024-06-14 12:37:19,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:37:19,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:37:19,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-14 12:37:19,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39018087855297157 [2024-06-14 12:37:19,082 INFO L175 Difference]: Start difference. First operand has 324 places, 451 transitions, 5211 flow. Second operand 9 states and 151 transitions. [2024-06-14 12:37:19,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 490 transitions, 7449 flow [2024-06-14 12:37:22,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 490 transitions, 7288 flow, removed 61 selfloop flow, removed 5 redundant places. [2024-06-14 12:37:22,716 INFO L231 Difference]: Finished difference. Result has 330 places, 471 transitions, 5824 flow [2024-06-14 12:37:22,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5050, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5824, PETRI_PLACES=330, PETRI_TRANSITIONS=471} [2024-06-14 12:37:22,716 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 286 predicate places. [2024-06-14 12:37:22,717 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 471 transitions, 5824 flow [2024-06-14 12:37:22,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:22,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:37:22,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:37:22,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 12:37:22,717 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:37:22,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:37:22,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1332126192, now seen corresponding path program 6 times [2024-06-14 12:37:22,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:37:22,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177068663] [2024-06-14 12:37:22,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:37:22,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:37:22,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:37:23,801 INFO 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 12:37:23,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:37:23,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177068663] [2024-06-14 12:37:23,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177068663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:37:23,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:37:23,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:37:23,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651726528] [2024-06-14 12:37:23,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:37:23,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:37:23,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:37:23,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:37:23,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:37:23,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:37:23,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 471 transitions, 5824 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:23,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:37:23,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:37:23,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:37:25,021 INFO L124 PetriNetUnfolderBase]: 3282/5050 cut-off events. [2024-06-14 12:37:25,021 INFO L125 PetriNetUnfolderBase]: For 1301056/1301067 co-relation queries the response was YES. [2024-06-14 12:37:25,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58375 conditions, 5050 events. 3282/5050 cut-off events. For 1301056/1301067 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 27732 event pairs, 706 based on Foata normal form. 6/5041 useless extension candidates. Maximal degree in co-relation 58213. Up to 4392 conditions per place. [2024-06-14 12:37:25,108 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 339 selfloop transitions, 156 changer transitions 0/499 dead transitions. [2024-06-14 12:37:25,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 499 transitions, 7958 flow [2024-06-14 12:37:25,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:37:25,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:37:25,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-14 12:37:25,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39018087855297157 [2024-06-14 12:37:25,109 INFO L175 Difference]: Start difference. First operand has 330 places, 471 transitions, 5824 flow. Second operand 9 states and 151 transitions. [2024-06-14 12:37:25,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 499 transitions, 7958 flow [2024-06-14 12:37:27,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 499 transitions, 7680 flow, removed 116 selfloop flow, removed 3 redundant places. [2024-06-14 12:37:27,757 INFO L231 Difference]: Finished difference. Result has 337 places, 483 transitions, 6359 flow [2024-06-14 12:37:27,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5602, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6359, PETRI_PLACES=337, PETRI_TRANSITIONS=483} [2024-06-14 12:37:27,757 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 293 predicate places. [2024-06-14 12:37:27,757 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 483 transitions, 6359 flow [2024-06-14 12:37:27,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:27,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:37:27,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:37:27,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 12:37:27,758 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:37:27,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:37:27,758 INFO L85 PathProgramCache]: Analyzing trace with hash 132328038, now seen corresponding path program 7 times [2024-06-14 12:37:27,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:37:27,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619865555] [2024-06-14 12:37:27,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:37:27,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:37:27,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:37:28,727 INFO 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 12:37:28,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:37:28,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619865555] [2024-06-14 12:37:28,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619865555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:37:28,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:37:28,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:37:28,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928768843] [2024-06-14 12:37:28,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:37:28,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:37:28,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:37:28,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:37:28,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:37:28,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:37:28,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 483 transitions, 6359 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:28,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:37:28,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:37:28,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:37:29,903 INFO L124 PetriNetUnfolderBase]: 3276/5044 cut-off events. [2024-06-14 12:37:29,903 INFO L125 PetriNetUnfolderBase]: For 1310626/1310637 co-relation queries the response was YES. [2024-06-14 12:37:29,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58642 conditions, 5044 events. 3276/5044 cut-off events. For 1310626/1310637 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 27682 event pairs, 708 based on Foata normal form. 6/5035 useless extension candidates. Maximal degree in co-relation 58477. Up to 4387 conditions per place. [2024-06-14 12:37:29,981 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 352 selfloop transitions, 144 changer transitions 0/500 dead transitions. [2024-06-14 12:37:29,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 500 transitions, 8140 flow [2024-06-14 12:37:29,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:37:29,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:37:29,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-14 12:37:29,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39276485788113696 [2024-06-14 12:37:29,983 INFO L175 Difference]: Start difference. First operand has 337 places, 483 transitions, 6359 flow. Second operand 9 states and 152 transitions. [2024-06-14 12:37:29,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 500 transitions, 8140 flow [2024-06-14 12:37:33,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 500 transitions, 7859 flow, removed 90 selfloop flow, removed 4 redundant places. [2024-06-14 12:37:33,034 INFO L231 Difference]: Finished difference. Result has 342 places, 484 transitions, 6442 flow [2024-06-14 12:37:33,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6088, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6442, PETRI_PLACES=342, PETRI_TRANSITIONS=484} [2024-06-14 12:37:33,034 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 298 predicate places. [2024-06-14 12:37:33,034 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 484 transitions, 6442 flow [2024-06-14 12:37:33,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:33,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:37:33,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:37:33,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 12:37:33,035 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:37:33,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:37:33,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1700479044, now seen corresponding path program 3 times [2024-06-14 12:37:33,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:37:33,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390163719] [2024-06-14 12:37:33,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:37:33,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:37:33,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:37:34,077 INFO 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 12:37:34,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:37:34,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390163719] [2024-06-14 12:37:34,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390163719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:37:34,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:37:34,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:37:34,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211346352] [2024-06-14 12:37:34,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:37:34,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:37:34,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:37:34,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:37:34,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:37:34,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:37:34,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 484 transitions, 6442 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:34,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:37:34,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:37:34,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:37:35,372 INFO L124 PetriNetUnfolderBase]: 3281/5053 cut-off events. [2024-06-14 12:37:35,373 INFO L125 PetriNetUnfolderBase]: For 1324846/1324848 co-relation queries the response was YES. [2024-06-14 12:37:35,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59152 conditions, 5053 events. 3281/5053 cut-off events. For 1324846/1324848 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 27771 event pairs, 730 based on Foata normal form. 1/5051 useless extension candidates. Maximal degree in co-relation 58985. Up to 4902 conditions per place. [2024-06-14 12:37:35,452 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 475 selfloop transitions, 20 changer transitions 0/499 dead transitions. [2024-06-14 12:37:35,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 499 transitions, 7570 flow [2024-06-14 12:37:35,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:37:35,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:37:35,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 131 transitions. [2024-06-14 12:37:35,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3385012919896641 [2024-06-14 12:37:35,454 INFO L175 Difference]: Start difference. First operand has 342 places, 484 transitions, 6442 flow. Second operand 9 states and 131 transitions. [2024-06-14 12:37:35,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 499 transitions, 7570 flow [2024-06-14 12:37:38,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 499 transitions, 7265 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-14 12:37:38,653 INFO L231 Difference]: Finished difference. Result has 346 places, 487 transitions, 6295 flow [2024-06-14 12:37:38,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6137, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6295, PETRI_PLACES=346, PETRI_TRANSITIONS=487} [2024-06-14 12:37:38,653 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 302 predicate places. [2024-06-14 12:37:38,653 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 487 transitions, 6295 flow [2024-06-14 12:37:38,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:38,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:37:38,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:37:38,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 12:37:38,654 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:37:38,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:37:38,654 INFO L85 PathProgramCache]: Analyzing trace with hash -984022524, now seen corresponding path program 4 times [2024-06-14 12:37:38,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:37:38,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464852522] [2024-06-14 12:37:38,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:37:38,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:37:38,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:37:39,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:37:39,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:37:39,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464852522] [2024-06-14 12:37:39,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464852522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:37:39,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:37:39,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:37:39,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722007035] [2024-06-14 12:37:39,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:37:39,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:37:39,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:37:39,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:37:39,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:37:39,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:37:39,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 487 transitions, 6295 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:39,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:37:39,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:37:39,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:37:40,938 INFO L124 PetriNetUnfolderBase]: 3286/5069 cut-off events. [2024-06-14 12:37:40,938 INFO L125 PetriNetUnfolderBase]: For 1348800/1348812 co-relation queries the response was YES. [2024-06-14 12:37:40,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59004 conditions, 5069 events. 3286/5069 cut-off events. For 1348800/1348812 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 27935 event pairs, 690 based on Foata normal form. 9/5071 useless extension candidates. Maximal degree in co-relation 58836. Up to 4847 conditions per place. [2024-06-14 12:37:41,022 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 444 selfloop transitions, 57 changer transitions 0/505 dead transitions. [2024-06-14 12:37:41,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 505 transitions, 7685 flow [2024-06-14 12:37:41,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:37:41,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:37:41,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-14 12:37:41,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35658914728682173 [2024-06-14 12:37:41,024 INFO L175 Difference]: Start difference. First operand has 346 places, 487 transitions, 6295 flow. Second operand 9 states and 138 transitions. [2024-06-14 12:37:41,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 505 transitions, 7685 flow [2024-06-14 12:37:43,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 505 transitions, 7555 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-14 12:37:43,537 INFO L231 Difference]: Finished difference. Result has 348 places, 490 transitions, 6397 flow [2024-06-14 12:37:43,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6165, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6397, PETRI_PLACES=348, PETRI_TRANSITIONS=490} [2024-06-14 12:37:43,538 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 304 predicate places. [2024-06-14 12:37:43,538 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 490 transitions, 6397 flow [2024-06-14 12:37:43,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:43,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:37:43,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:37:43,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 12:37:43,539 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:37:43,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:37:43,539 INFO L85 PathProgramCache]: Analyzing trace with hash -997844618, now seen corresponding path program 8 times [2024-06-14 12:37:43,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:37:43,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493089307] [2024-06-14 12:37:43,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:37:43,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:37:43,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:37:44,591 INFO 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 12:37:44,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:37:44,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493089307] [2024-06-14 12:37:44,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493089307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:37:44,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:37:44,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:37:44,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88241848] [2024-06-14 12:37:44,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:37:44,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:37:44,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:37:44,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:37:44,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:37:44,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:37:44,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 490 transitions, 6397 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:44,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:37:44,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:37:44,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:37:45,920 INFO L124 PetriNetUnfolderBase]: 3296/5072 cut-off events. [2024-06-14 12:37:45,921 INFO L125 PetriNetUnfolderBase]: For 1378672/1378683 co-relation queries the response was YES. [2024-06-14 12:37:45,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59361 conditions, 5072 events. 3296/5072 cut-off events. For 1378672/1378683 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 27862 event pairs, 706 based on Foata normal form. 6/5063 useless extension candidates. Maximal degree in co-relation 59192. Up to 4411 conditions per place. [2024-06-14 12:37:45,995 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 352 selfloop transitions, 154 changer transitions 0/510 dead transitions. [2024-06-14 12:37:45,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 510 transitions, 8275 flow [2024-06-14 12:37:45,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:37:45,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:37:45,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-14 12:37:45,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875968992248062 [2024-06-14 12:37:45,997 INFO L175 Difference]: Start difference. First operand has 348 places, 490 transitions, 6397 flow. Second operand 9 states and 150 transitions. [2024-06-14 12:37:45,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 510 transitions, 8275 flow [2024-06-14 12:37:49,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 510 transitions, 8081 flow, removed 54 selfloop flow, removed 6 redundant places. [2024-06-14 12:37:49,328 INFO L231 Difference]: Finished difference. Result has 351 places, 494 transitions, 6644 flow [2024-06-14 12:37:49,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6203, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6644, PETRI_PLACES=351, PETRI_TRANSITIONS=494} [2024-06-14 12:37:49,328 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 307 predicate places. [2024-06-14 12:37:49,328 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 494 transitions, 6644 flow [2024-06-14 12:37:49,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:49,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:37:49,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:37:49,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 12:37:49,329 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:37:49,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:37:49,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1686193810, now seen corresponding path program 9 times [2024-06-14 12:37:49,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:37:49,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671267311] [2024-06-14 12:37:49,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:37:49,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:37:49,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:37:50,286 INFO 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 12:37:50,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:37:50,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671267311] [2024-06-14 12:37:50,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671267311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:37:50,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:37:50,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:37:50,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189702248] [2024-06-14 12:37:50,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:37:50,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:37:50,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:37:50,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:37:50,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:37:50,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:37:50,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 494 transitions, 6644 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:50,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:37:50,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:37:50,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:37:51,648 INFO L124 PetriNetUnfolderBase]: 3324/5116 cut-off events. [2024-06-14 12:37:51,648 INFO L125 PetriNetUnfolderBase]: For 1413483/1413494 co-relation queries the response was YES. [2024-06-14 12:37:51,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60599 conditions, 5116 events. 3324/5116 cut-off events. For 1413483/1413494 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 28193 event pairs, 708 based on Foata normal form. 6/5107 useless extension candidates. Maximal degree in co-relation 60429. Up to 4439 conditions per place. [2024-06-14 12:37:51,723 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 357 selfloop transitions, 157 changer transitions 0/518 dead transitions. [2024-06-14 12:37:51,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 518 transitions, 8677 flow [2024-06-14 12:37:51,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:37:51,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:37:51,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-14 12:37:51,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875968992248062 [2024-06-14 12:37:51,725 INFO L175 Difference]: Start difference. First operand has 351 places, 494 transitions, 6644 flow. Second operand 9 states and 150 transitions. [2024-06-14 12:37:51,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 518 transitions, 8677 flow [2024-06-14 12:37:55,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 518 transitions, 8216 flow, removed 69 selfloop flow, removed 7 redundant places. [2024-06-14 12:37:55,480 INFO L231 Difference]: Finished difference. Result has 354 places, 502 transitions, 6784 flow [2024-06-14 12:37:55,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6224, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6784, PETRI_PLACES=354, PETRI_TRANSITIONS=502} [2024-06-14 12:37:55,481 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 310 predicate places. [2024-06-14 12:37:55,481 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 502 transitions, 6784 flow [2024-06-14 12:37:55,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:55,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:37:55,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:37:55,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 12:37:55,482 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:37:55,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:37:55,482 INFO L85 PathProgramCache]: Analyzing trace with hash -984022958, now seen corresponding path program 10 times [2024-06-14 12:37:55,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:37:55,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491831674] [2024-06-14 12:37:55,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:37:55,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:37:55,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:37:56,503 INFO 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 12:37:56,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:37:56,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491831674] [2024-06-14 12:37:56,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491831674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:37:56,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:37:56,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:37:56,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597853334] [2024-06-14 12:37:56,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:37:56,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:37:56,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:37:56,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:37:56,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:37:56,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:37:56,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 502 transitions, 6784 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:37:56,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:37:56,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:37:56,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:37:57,737 INFO L124 PetriNetUnfolderBase]: 3320/5112 cut-off events. [2024-06-14 12:37:57,737 INFO L125 PetriNetUnfolderBase]: For 1420011/1420022 co-relation queries the response was YES. [2024-06-14 12:37:57,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60267 conditions, 5112 events. 3320/5112 cut-off events. For 1420011/1420022 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 28150 event pairs, 706 based on Foata normal form. 6/5103 useless extension candidates. Maximal degree in co-relation 60095. Up to 4437 conditions per place. [2024-06-14 12:37:57,821 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 341 selfloop transitions, 172 changer transitions 0/517 dead transitions. [2024-06-14 12:37:57,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 517 transitions, 8324 flow [2024-06-14 12:37:57,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:37:57,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:37:57,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-14 12:37:57,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38242894056847543 [2024-06-14 12:37:57,822 INFO L175 Difference]: Start difference. First operand has 354 places, 502 transitions, 6784 flow. Second operand 9 states and 148 transitions. [2024-06-14 12:37:57,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 517 transitions, 8324 flow [2024-06-14 12:38:01,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 517 transitions, 7871 flow, removed 95 selfloop flow, removed 5 redundant places. [2024-06-14 12:38:01,310 INFO L231 Difference]: Finished difference. Result has 358 places, 502 transitions, 6683 flow [2024-06-14 12:38:01,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6331, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6683, PETRI_PLACES=358, PETRI_TRANSITIONS=502} [2024-06-14 12:38:01,310 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 314 predicate places. [2024-06-14 12:38:01,311 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 502 transitions, 6683 flow [2024-06-14 12:38:01,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:01,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:01,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:01,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 12:38:01,311 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:38:01,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:01,312 INFO L85 PathProgramCache]: Analyzing trace with hash -997832094, now seen corresponding path program 5 times [2024-06-14 12:38:01,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:01,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67728562] [2024-06-14 12:38:01,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:01,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:01,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:02,347 INFO 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 12:38:02,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:02,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67728562] [2024-06-14 12:38:02,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67728562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:02,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:02,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:38:02,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262208531] [2024-06-14 12:38:02,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:02,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:38:02,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:02,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:38:02,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:38:02,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:38:02,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 502 transitions, 6683 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:02,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:02,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:38:02,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:03,552 INFO L124 PetriNetUnfolderBase]: 3317/5121 cut-off events. [2024-06-14 12:38:03,553 INFO L125 PetriNetUnfolderBase]: For 1429956/1429968 co-relation queries the response was YES. [2024-06-14 12:38:03,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60146 conditions, 5121 events. 3317/5121 cut-off events. For 1429956/1429968 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 28302 event pairs, 689 based on Foata normal form. 9/5123 useless extension candidates. Maximal degree in co-relation 59973. Up to 4892 conditions per place. [2024-06-14 12:38:03,638 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 457 selfloop transitions, 55 changer transitions 0/516 dead transitions. [2024-06-14 12:38:03,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 516 transitions, 7751 flow [2024-06-14 12:38:03,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:38:03,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:38:03,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-14 12:38:03,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35658914728682173 [2024-06-14 12:38:03,640 INFO L175 Difference]: Start difference. First operand has 358 places, 502 transitions, 6683 flow. Second operand 9 states and 138 transitions. [2024-06-14 12:38:03,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 516 transitions, 7751 flow [2024-06-14 12:38:06,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 516 transitions, 7308 flow, removed 53 selfloop flow, removed 9 redundant places. [2024-06-14 12:38:06,363 INFO L231 Difference]: Finished difference. Result has 358 places, 502 transitions, 6356 flow [2024-06-14 12:38:06,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6240, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6356, PETRI_PLACES=358, PETRI_TRANSITIONS=502} [2024-06-14 12:38:06,363 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 314 predicate places. [2024-06-14 12:38:06,363 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 502 transitions, 6356 flow [2024-06-14 12:38:06,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:06,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:06,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:06,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 12:38:06,364 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:38:06,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:06,365 INFO L85 PathProgramCache]: Analyzing trace with hash -2114510874, now seen corresponding path program 1 times [2024-06-14 12:38:06,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:06,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688260696] [2024-06-14 12:38:06,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:06,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:06,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:07,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:38:07,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:07,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688260696] [2024-06-14 12:38:07,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688260696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:07,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:07,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:38:07,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708454905] [2024-06-14 12:38:07,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:07,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:38:07,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:07,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:38:07,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:38:07,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:38:07,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 502 transitions, 6356 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:07,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:07,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:38:07,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:08,832 INFO L124 PetriNetUnfolderBase]: 3152/4949 cut-off events. [2024-06-14 12:38:08,833 INFO L125 PetriNetUnfolderBase]: For 1466153/1466155 co-relation queries the response was YES. [2024-06-14 12:38:08,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58911 conditions, 4949 events. 3152/4949 cut-off events. For 1466153/1466155 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 28060 event pairs, 634 based on Foata normal form. 2/4948 useless extension candidates. Maximal degree in co-relation 58739. Up to 4435 conditions per place. [2024-06-14 12:38:08,914 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 451 selfloop transitions, 17 changer transitions 0/526 dead transitions. [2024-06-14 12:38:08,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 526 transitions, 7430 flow [2024-06-14 12:38:08,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:38:08,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:38:08,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 12:38:08,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-14 12:38:08,915 INFO L175 Difference]: Start difference. First operand has 358 places, 502 transitions, 6356 flow. Second operand 8 states and 143 transitions. [2024-06-14 12:38:08,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 526 transitions, 7430 flow [2024-06-14 12:38:13,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 526 transitions, 7274 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-14 12:38:13,265 INFO L231 Difference]: Finished difference. Result has 357 places, 504 transitions, 6317 flow [2024-06-14 12:38:13,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6200, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6317, PETRI_PLACES=357, PETRI_TRANSITIONS=504} [2024-06-14 12:38:13,265 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 313 predicate places. [2024-06-14 12:38:13,265 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 504 transitions, 6317 flow [2024-06-14 12:38:13,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:13,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:13,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:13,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 12:38:13,266 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:38:13,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:13,267 INFO L85 PathProgramCache]: Analyzing trace with hash -2111769234, now seen corresponding path program 2 times [2024-06-14 12:38:13,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:13,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356635164] [2024-06-14 12:38:13,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:13,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:13,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:14,483 INFO 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 12:38:14,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:14,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356635164] [2024-06-14 12:38:14,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356635164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:14,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:14,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:38:14,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752356643] [2024-06-14 12:38:14,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:14,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:38:14,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:14,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:38:14,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:38:14,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:38:14,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 504 transitions, 6317 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:14,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:14,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:38:14,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:15,849 INFO L124 PetriNetUnfolderBase]: 3167/4959 cut-off events. [2024-06-14 12:38:15,850 INFO L125 PetriNetUnfolderBase]: For 1505261/1505265 co-relation queries the response was YES. [2024-06-14 12:38:15,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59650 conditions, 4959 events. 3167/4959 cut-off events. For 1505261/1505265 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 28010 event pairs, 679 based on Foata normal form. 2/4952 useless extension candidates. Maximal degree in co-relation 59477. Up to 4465 conditions per place. [2024-06-14 12:38:15,935 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 446 selfloop transitions, 21 changer transitions 0/525 dead transitions. [2024-06-14 12:38:15,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 525 transitions, 7391 flow [2024-06-14 12:38:15,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:38:15,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:38:15,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 12:38:15,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-14 12:38:15,937 INFO L175 Difference]: Start difference. First operand has 357 places, 504 transitions, 6317 flow. Second operand 8 states and 141 transitions. [2024-06-14 12:38:15,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 525 transitions, 7391 flow [2024-06-14 12:38:19,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 525 transitions, 7290 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-14 12:38:19,702 INFO L231 Difference]: Finished difference. Result has 359 places, 506 transitions, 6346 flow [2024-06-14 12:38:19,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6216, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6346, PETRI_PLACES=359, PETRI_TRANSITIONS=506} [2024-06-14 12:38:19,703 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 315 predicate places. [2024-06-14 12:38:19,703 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 506 transitions, 6346 flow [2024-06-14 12:38:19,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:19,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:19,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:19,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 12:38:19,704 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:38:19,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:19,704 INFO L85 PathProgramCache]: Analyzing trace with hash 444821231, now seen corresponding path program 1 times [2024-06-14 12:38:19,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:19,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906560532] [2024-06-14 12:38:19,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:19,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:19,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:20,980 INFO 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 12:38:20,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:20,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906560532] [2024-06-14 12:38:20,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906560532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:20,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:20,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:38:20,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117295228] [2024-06-14 12:38:20,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:20,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:38:20,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:20,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:38:20,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:38:21,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:38:21,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 506 transitions, 6346 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:21,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:21,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:38:21,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:22,520 INFO L124 PetriNetUnfolderBase]: 3257/5066 cut-off events. [2024-06-14 12:38:22,520 INFO L125 PetriNetUnfolderBase]: For 1527291/1527293 co-relation queries the response was YES. [2024-06-14 12:38:22,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60101 conditions, 5066 events. 3257/5066 cut-off events. For 1527291/1527293 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 28352 event pairs, 691 based on Foata normal form. 4/5067 useless extension candidates. Maximal degree in co-relation 59927. Up to 4713 conditions per place. [2024-06-14 12:38:22,605 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 482 selfloop transitions, 23 changer transitions 0/530 dead transitions. [2024-06-14 12:38:22,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 530 transitions, 7514 flow [2024-06-14 12:38:22,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:38:22,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:38:22,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-14 12:38:22,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3850129198966408 [2024-06-14 12:38:22,607 INFO L175 Difference]: Start difference. First operand has 359 places, 506 transitions, 6346 flow. Second operand 9 states and 149 transitions. [2024-06-14 12:38:22,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 530 transitions, 7514 flow [2024-06-14 12:38:26,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 530 transitions, 7402 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-14 12:38:26,502 INFO L231 Difference]: Finished difference. Result has 362 places, 509 transitions, 6368 flow [2024-06-14 12:38:26,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6234, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6368, PETRI_PLACES=362, PETRI_TRANSITIONS=509} [2024-06-14 12:38:26,502 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 318 predicate places. [2024-06-14 12:38:26,503 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 509 transitions, 6368 flow [2024-06-14 12:38:26,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:26,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:26,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:26,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 12:38:26,503 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:38:26,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:26,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1373925464, now seen corresponding path program 1 times [2024-06-14 12:38:26,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:26,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431115608] [2024-06-14 12:38:26,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:26,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:26,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:27,648 INFO 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 12:38:27,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:27,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431115608] [2024-06-14 12:38:27,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431115608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:27,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:27,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:38:27,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617834808] [2024-06-14 12:38:27,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:27,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:38:27,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:27,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:38:27,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:38:27,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:38:27,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 509 transitions, 6368 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:27,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:27,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:38:27,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:29,294 INFO L124 PetriNetUnfolderBase]: 3254/5060 cut-off events. [2024-06-14 12:38:29,295 INFO L125 PetriNetUnfolderBase]: For 1518994/1518996 co-relation queries the response was YES. [2024-06-14 12:38:29,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60317 conditions, 5060 events. 3254/5060 cut-off events. For 1518994/1518996 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 28303 event pairs, 690 based on Foata normal form. 1/5056 useless extension candidates. Maximal degree in co-relation 60142. Up to 4711 conditions per place. [2024-06-14 12:38:29,380 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 478 selfloop transitions, 25 changer transitions 0/528 dead transitions. [2024-06-14 12:38:29,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 528 transitions, 7444 flow [2024-06-14 12:38:29,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:38:29,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:38:29,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-14 12:38:29,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-14 12:38:29,381 INFO L175 Difference]: Start difference. First operand has 362 places, 509 transitions, 6368 flow. Second operand 8 states and 135 transitions. [2024-06-14 12:38:29,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 528 transitions, 7444 flow [2024-06-14 12:38:34,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 528 transitions, 7300 flow, removed 51 selfloop flow, removed 7 redundant places. [2024-06-14 12:38:34,217 INFO L231 Difference]: Finished difference. Result has 363 places, 509 transitions, 6284 flow [2024-06-14 12:38:34,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6224, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6284, PETRI_PLACES=363, PETRI_TRANSITIONS=509} [2024-06-14 12:38:34,218 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 319 predicate places. [2024-06-14 12:38:34,218 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 509 transitions, 6284 flow [2024-06-14 12:38:34,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:34,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:34,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:34,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 12:38:34,219 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:38:34,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:34,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1255837908, now seen corresponding path program 3 times [2024-06-14 12:38:34,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:34,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035360601] [2024-06-14 12:38:34,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:34,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:34,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:35,536 INFO 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 12:38:35,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:35,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035360601] [2024-06-14 12:38:35,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035360601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:35,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:35,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:38:35,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879739304] [2024-06-14 12:38:35,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:35,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:38:35,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:35,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:38:35,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:38:35,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:38:35,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 509 transitions, 6284 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:35,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:35,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:38:35,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:36,826 INFO L124 PetriNetUnfolderBase]: 3178/4977 cut-off events. [2024-06-14 12:38:36,826 INFO L125 PetriNetUnfolderBase]: For 1572284/1572290 co-relation queries the response was YES. [2024-06-14 12:38:36,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60474 conditions, 4977 events. 3178/4977 cut-off events. For 1572284/1572290 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 28155 event pairs, 673 based on Foata normal form. 2/4966 useless extension candidates. Maximal degree in co-relation 60298. Up to 4477 conditions per place. [2024-06-14 12:38:36,911 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 444 selfloop transitions, 26 changer transitions 0/528 dead transitions. [2024-06-14 12:38:36,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 528 transitions, 7370 flow [2024-06-14 12:38:36,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:38:36,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:38:36,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 12:38:36,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-14 12:38:36,913 INFO L175 Difference]: Start difference. First operand has 363 places, 509 transitions, 6284 flow. Second operand 8 states and 141 transitions. [2024-06-14 12:38:36,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 528 transitions, 7370 flow [2024-06-14 12:38:41,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 528 transitions, 7284 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-14 12:38:41,132 INFO L231 Difference]: Finished difference. Result has 363 places, 511 transitions, 6343 flow [2024-06-14 12:38:41,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6198, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6343, PETRI_PLACES=363, PETRI_TRANSITIONS=511} [2024-06-14 12:38:41,133 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 319 predicate places. [2024-06-14 12:38:41,133 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 511 transitions, 6343 flow [2024-06-14 12:38:41,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:41,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:41,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:41,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 12:38:41,135 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:38:41,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:41,135 INFO L85 PathProgramCache]: Analyzing trace with hash -276119795, now seen corresponding path program 2 times [2024-06-14 12:38:41,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:41,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49940309] [2024-06-14 12:38:41,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:41,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:41,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:42,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:38:42,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:42,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49940309] [2024-06-14 12:38:42,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49940309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:42,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:42,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:38:42,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832505867] [2024-06-14 12:38:42,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:42,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:38:42,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:42,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:38:42,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:38:42,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:38:42,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 511 transitions, 6343 flow. Second operand has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:42,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:42,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:38:42,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:44,036 INFO L124 PetriNetUnfolderBase]: 3353/5206 cut-off events. [2024-06-14 12:38:44,036 INFO L125 PetriNetUnfolderBase]: For 1681932/1681934 co-relation queries the response was YES. [2024-06-14 12:38:44,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63747 conditions, 5206 events. 3353/5206 cut-off events. For 1681932/1681934 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 29199 event pairs, 700 based on Foata normal form. 4/5207 useless extension candidates. Maximal degree in co-relation 63570. Up to 4734 conditions per place. [2024-06-14 12:38:44,129 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 470 selfloop transitions, 49 changer transitions 0/544 dead transitions. [2024-06-14 12:38:44,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 544 transitions, 8271 flow [2024-06-14 12:38:44,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:38:44,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:38:44,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-14 12:38:44,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40568475452196384 [2024-06-14 12:38:44,131 INFO L175 Difference]: Start difference. First operand has 363 places, 511 transitions, 6343 flow. Second operand 9 states and 157 transitions. [2024-06-14 12:38:44,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 544 transitions, 8271 flow [2024-06-14 12:38:49,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 544 transitions, 8142 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-14 12:38:49,460 INFO L231 Difference]: Finished difference. Result has 368 places, 522 transitions, 6661 flow [2024-06-14 12:38:49,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6214, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6661, PETRI_PLACES=368, PETRI_TRANSITIONS=522} [2024-06-14 12:38:49,460 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 324 predicate places. [2024-06-14 12:38:49,460 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 522 transitions, 6661 flow [2024-06-14 12:38:49,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:49,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:49,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:49,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 12:38:49,461 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:38:49,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:49,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1191565482, now seen corresponding path program 1 times [2024-06-14 12:38:49,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:49,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361296219] [2024-06-14 12:38:49,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:49,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:49,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:50,380 INFO 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 12:38:50,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:50,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361296219] [2024-06-14 12:38:50,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361296219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:50,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:50,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:38:50,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142802726] [2024-06-14 12:38:50,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:50,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:38:50,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:50,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:38:50,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:38:50,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:38:50,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 522 transitions, 6661 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:50,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:50,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:38:50,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:51,913 INFO L124 PetriNetUnfolderBase]: 3361/5213 cut-off events. [2024-06-14 12:38:51,913 INFO L125 PetriNetUnfolderBase]: For 1711759/1711761 co-relation queries the response was YES. [2024-06-14 12:38:51,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64556 conditions, 5213 events. 3361/5213 cut-off events. For 1711759/1711761 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 29261 event pairs, 705 based on Foata normal form. 6/5216 useless extension candidates. Maximal degree in co-relation 64376. Up to 4740 conditions per place. [2024-06-14 12:38:52,003 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 466 selfloop transitions, 55 changer transitions 0/546 dead transitions. [2024-06-14 12:38:52,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 546 transitions, 8151 flow [2024-06-14 12:38:52,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:38:52,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:38:52,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-14 12:38:52,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979328165374677 [2024-06-14 12:38:52,004 INFO L175 Difference]: Start difference. First operand has 368 places, 522 transitions, 6661 flow. Second operand 9 states and 154 transitions. [2024-06-14 12:38:52,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 546 transitions, 8151 flow [2024-06-14 12:38:56,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 546 transitions, 8027 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-14 12:38:56,447 INFO L231 Difference]: Finished difference. Result has 373 places, 525 transitions, 6752 flow [2024-06-14 12:38:56,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6547, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6752, PETRI_PLACES=373, PETRI_TRANSITIONS=525} [2024-06-14 12:38:56,448 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 329 predicate places. [2024-06-14 12:38:56,449 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 525 transitions, 6752 flow [2024-06-14 12:38:56,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:56,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:38:56,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:38:56,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 12:38:56,451 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:38:56,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:38:56,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1996184804, now seen corresponding path program 2 times [2024-06-14 12:38:56,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:38:56,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192055091] [2024-06-14 12:38:56,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:38:56,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:38:56,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:38:57,388 INFO 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 12:38:57,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:38:57,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192055091] [2024-06-14 12:38:57,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192055091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:38:57,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:38:57,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:38:57,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697900857] [2024-06-14 12:38:57,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:38:57,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:38:57,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:38:57,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:38:57,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:38:57,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:38:57,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 525 transitions, 6752 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:38:57,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:38:57,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:38:57,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:38:58,859 INFO L124 PetriNetUnfolderBase]: 3341/5187 cut-off events. [2024-06-14 12:38:58,860 INFO L125 PetriNetUnfolderBase]: For 1686135/1686137 co-relation queries the response was YES. [2024-06-14 12:38:58,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63930 conditions, 5187 events. 3341/5187 cut-off events. For 1686135/1686137 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 29081 event pairs, 706 based on Foata normal form. 4/5186 useless extension candidates. Maximal degree in co-relation 63748. Up to 4728 conditions per place. [2024-06-14 12:38:58,944 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 468 selfloop transitions, 53 changer transitions 0/546 dead transitions. [2024-06-14 12:38:58,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 546 transitions, 8150 flow [2024-06-14 12:38:58,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:38:58,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:38:58,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-14 12:38:58,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005167958656331 [2024-06-14 12:38:58,946 INFO L175 Difference]: Start difference. First operand has 373 places, 525 transitions, 6752 flow. Second operand 9 states and 155 transitions. [2024-06-14 12:38:58,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 546 transitions, 8150 flow [2024-06-14 12:39:03,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 546 transitions, 7911 flow, removed 78 selfloop flow, removed 6 redundant places. [2024-06-14 12:39:03,753 INFO L231 Difference]: Finished difference. Result has 376 places, 525 transitions, 6625 flow [2024-06-14 12:39:03,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6513, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6625, PETRI_PLACES=376, PETRI_TRANSITIONS=525} [2024-06-14 12:39:03,753 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 332 predicate places. [2024-06-14 12:39:03,753 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 525 transitions, 6625 flow [2024-06-14 12:39:03,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:03,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:03,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:03,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 12:39:03,754 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:03,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:03,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1463828268, now seen corresponding path program 4 times [2024-06-14 12:39:03,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:03,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805695022] [2024-06-14 12:39:03,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:03,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:03,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:05,027 INFO 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 12:39:05,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:05,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805695022] [2024-06-14 12:39:05,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805695022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:05,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:05,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:39:05,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504364640] [2024-06-14 12:39:05,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:05,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:39:05,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:05,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:39:05,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:39:05,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:39:05,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 525 transitions, 6625 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:05,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:05,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:39:05,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:06,471 INFO L124 PetriNetUnfolderBase]: 3214/5052 cut-off events. [2024-06-14 12:39:06,472 INFO L125 PetriNetUnfolderBase]: For 1686926/1686942 co-relation queries the response was YES. [2024-06-14 12:39:06,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62750 conditions, 5052 events. 3214/5052 cut-off events. For 1686926/1686942 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 28990 event pairs, 650 based on Foata normal form. 3/5031 useless extension candidates. Maximal degree in co-relation 62567. Up to 4526 conditions per place. [2024-06-14 12:39:06,553 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 450 selfloop transitions, 33 changer transitions 0/541 dead transitions. [2024-06-14 12:39:06,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 541 transitions, 7733 flow [2024-06-14 12:39:06,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:39:06,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:39:06,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 12:39:06,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-14 12:39:06,554 INFO L175 Difference]: Start difference. First operand has 376 places, 525 transitions, 6625 flow. Second operand 8 states and 140 transitions. [2024-06-14 12:39:06,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 541 transitions, 7733 flow [2024-06-14 12:39:10,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 541 transitions, 7638 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-14 12:39:10,171 INFO L231 Difference]: Finished difference. Result has 377 places, 527 transitions, 6695 flow [2024-06-14 12:39:10,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6530, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6695, PETRI_PLACES=377, PETRI_TRANSITIONS=527} [2024-06-14 12:39:10,172 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 333 predicate places. [2024-06-14 12:39:10,172 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 527 transitions, 6695 flow [2024-06-14 12:39:10,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:10,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:10,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:10,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 12:39:10,173 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:10,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:10,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1830718650, now seen corresponding path program 3 times [2024-06-14 12:39:10,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:10,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467663703] [2024-06-14 12:39:10,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:10,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:10,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:11,244 INFO 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 12:39:11,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:11,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467663703] [2024-06-14 12:39:11,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467663703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:11,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:11,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:39:11,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209262011] [2024-06-14 12:39:11,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:11,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:39:11,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:11,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:39:11,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:39:11,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:39:11,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 527 transitions, 6695 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:11,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:11,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:39:11,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:12,702 INFO L124 PetriNetUnfolderBase]: 3357/5225 cut-off events. [2024-06-14 12:39:12,702 INFO L125 PetriNetUnfolderBase]: For 1741931/1741939 co-relation queries the response was YES. [2024-06-14 12:39:12,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64392 conditions, 5225 events. 3357/5225 cut-off events. For 1741931/1741939 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 29613 event pairs, 689 based on Foata normal form. 5/5224 useless extension candidates. Maximal degree in co-relation 64208. Up to 4617 conditions per place. [2024-06-14 12:39:12,783 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 443 selfloop transitions, 91 changer transitions 0/559 dead transitions. [2024-06-14 12:39:12,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 559 transitions, 8965 flow [2024-06-14 12:39:12,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:39:12,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:39:12,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 12:39:12,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 12:39:12,785 INFO L175 Difference]: Start difference. First operand has 377 places, 527 transitions, 6695 flow. Second operand 9 states and 162 transitions. [2024-06-14 12:39:12,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 559 transitions, 8965 flow [2024-06-14 12:39:16,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 559 transitions, 8816 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-14 12:39:16,988 INFO L231 Difference]: Finished difference. Result has 382 places, 538 transitions, 7118 flow [2024-06-14 12:39:16,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6546, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7118, PETRI_PLACES=382, PETRI_TRANSITIONS=538} [2024-06-14 12:39:16,988 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 338 predicate places. [2024-06-14 12:39:16,988 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 538 transitions, 7118 flow [2024-06-14 12:39:16,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:16,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:16,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:16,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 12:39:16,989 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:16,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:16,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1691913868, now seen corresponding path program 4 times [2024-06-14 12:39:16,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:16,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146451810] [2024-06-14 12:39:16,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:16,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:16,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:17,918 INFO 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 12:39:17,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:17,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146451810] [2024-06-14 12:39:17,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146451810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:17,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:17,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:39:17,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125621580] [2024-06-14 12:39:17,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:17,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:39:17,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:17,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:39:17,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:39:18,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:39:18,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 538 transitions, 7118 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:18,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:18,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:39:18,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:19,504 INFO L124 PetriNetUnfolderBase]: 3506/5436 cut-off events. [2024-06-14 12:39:19,504 INFO L125 PetriNetUnfolderBase]: For 1934088/1934096 co-relation queries the response was YES. [2024-06-14 12:39:19,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70228 conditions, 5436 events. 3506/5436 cut-off events. For 1934088/1934096 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 30831 event pairs, 690 based on Foata normal form. 7/5437 useless extension candidates. Maximal degree in co-relation 70041. Up to 4731 conditions per place. [2024-06-14 12:39:19,599 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 450 selfloop transitions, 103 changer transitions 0/578 dead transitions. [2024-06-14 12:39:19,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 578 transitions, 9726 flow [2024-06-14 12:39:19,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:39:19,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:39:19,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 12:39:19,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 12:39:19,600 INFO L175 Difference]: Start difference. First operand has 382 places, 538 transitions, 7118 flow. Second operand 9 states and 162 transitions. [2024-06-14 12:39:19,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 578 transitions, 9726 flow [2024-06-14 12:39:24,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 578 transitions, 9388 flow, removed 120 selfloop flow, removed 5 redundant places. [2024-06-14 12:39:24,203 INFO L231 Difference]: Finished difference. Result has 387 places, 554 transitions, 7550 flow [2024-06-14 12:39:24,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6884, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7550, PETRI_PLACES=387, PETRI_TRANSITIONS=554} [2024-06-14 12:39:24,204 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 343 predicate places. [2024-06-14 12:39:24,204 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 554 transitions, 7550 flow [2024-06-14 12:39:24,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:24,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:24,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:24,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 12:39:24,205 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:24,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:24,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1830539160, now seen corresponding path program 5 times [2024-06-14 12:39:24,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:24,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888279183] [2024-06-14 12:39:24,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:24,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:24,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:25,220 INFO 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 12:39:25,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:25,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888279183] [2024-06-14 12:39:25,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888279183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:25,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:25,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:39:25,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498943339] [2024-06-14 12:39:25,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:25,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:39:25,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:25,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:39:25,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:39:25,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:39:25,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 554 transitions, 7550 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:25,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:25,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:39:25,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:27,127 INFO L124 PetriNetUnfolderBase]: 3513/5442 cut-off events. [2024-06-14 12:39:27,128 INFO L125 PetriNetUnfolderBase]: For 1938189/1938197 co-relation queries the response was YES. [2024-06-14 12:39:27,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69765 conditions, 5442 events. 3513/5442 cut-off events. For 1938189/1938197 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 30855 event pairs, 719 based on Foata normal form. 7/5443 useless extension candidates. Maximal degree in co-relation 69576. Up to 4737 conditions per place. [2024-06-14 12:39:27,215 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 453 selfloop transitions, 102 changer transitions 0/580 dead transitions. [2024-06-14 12:39:27,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 580 transitions, 9708 flow [2024-06-14 12:39:27,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:39:27,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:39:27,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-14 12:39:27,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-14 12:39:27,217 INFO L175 Difference]: Start difference. First operand has 387 places, 554 transitions, 7550 flow. Second operand 9 states and 163 transitions. [2024-06-14 12:39:27,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 580 transitions, 9708 flow [2024-06-14 12:39:32,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 580 transitions, 9491 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-06-14 12:39:32,459 INFO L231 Difference]: Finished difference. Result has 393 places, 558 transitions, 7700 flow [2024-06-14 12:39:32,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7337, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7700, PETRI_PLACES=393, PETRI_TRANSITIONS=558} [2024-06-14 12:39:32,459 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 349 predicate places. [2024-06-14 12:39:32,460 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 558 transitions, 7700 flow [2024-06-14 12:39:32,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:32,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:32,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:32,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-14 12:39:32,460 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:32,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:32,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1090020834, now seen corresponding path program 6 times [2024-06-14 12:39:32,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:32,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383125452] [2024-06-14 12:39:32,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:32,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:32,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:33,490 INFO 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 12:39:33,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:33,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383125452] [2024-06-14 12:39:33,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383125452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:33,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:33,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:39:33,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777583411] [2024-06-14 12:39:33,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:33,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:39:33,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:33,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:39:33,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:39:33,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:39:33,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 558 transitions, 7700 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:33,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:33,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:39:33,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:35,281 INFO L124 PetriNetUnfolderBase]: 3502/5436 cut-off events. [2024-06-14 12:39:35,281 INFO L125 PetriNetUnfolderBase]: For 1914756/1914764 co-relation queries the response was YES. [2024-06-14 12:39:35,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68972 conditions, 5436 events. 3502/5436 cut-off events. For 1914756/1914764 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 30890 event pairs, 704 based on Foata normal form. 5/5435 useless extension candidates. Maximal degree in co-relation 68781. Up to 4731 conditions per place. [2024-06-14 12:39:35,372 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 453 selfloop transitions, 102 changer transitions 0/580 dead transitions. [2024-06-14 12:39:35,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 580 transitions, 9732 flow [2024-06-14 12:39:35,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:39:35,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:39:35,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-14 12:39:35,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-14 12:39:35,373 INFO L175 Difference]: Start difference. First operand has 393 places, 558 transitions, 7700 flow. Second operand 9 states and 164 transitions. [2024-06-14 12:39:35,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 580 transitions, 9732 flow [2024-06-14 12:39:39,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 580 transitions, 9407 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-14 12:39:39,856 INFO L231 Difference]: Finished difference. Result has 395 places, 559 transitions, 7607 flow [2024-06-14 12:39:39,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7375, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7607, PETRI_PLACES=395, PETRI_TRANSITIONS=559} [2024-06-14 12:39:39,857 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 351 predicate places. [2024-06-14 12:39:39,857 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 559 transitions, 7607 flow [2024-06-14 12:39:39,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:39,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:39,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:39,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-14 12:39:39,857 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:39,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:39,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1700188078, now seen corresponding path program 7 times [2024-06-14 12:39:39,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:39,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871413504] [2024-06-14 12:39:39,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:39,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:39,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:40,854 INFO 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 12:39:40,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:40,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871413504] [2024-06-14 12:39:40,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871413504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:40,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:40,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:39:40,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638221399] [2024-06-14 12:39:40,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:40,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:39:40,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:40,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:39:40,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:39:40,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:39:40,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 559 transitions, 7607 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:40,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:40,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:39:40,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:42,361 INFO L124 PetriNetUnfolderBase]: 3488/5418 cut-off events. [2024-06-14 12:39:42,361 INFO L125 PetriNetUnfolderBase]: For 1903784/1903792 co-relation queries the response was YES. [2024-06-14 12:39:42,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67816 conditions, 5418 events. 3488/5418 cut-off events. For 1903784/1903792 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 30864 event pairs, 678 based on Foata normal form. 7/5419 useless extension candidates. Maximal degree in co-relation 67624. Up to 4725 conditions per place. [2024-06-14 12:39:42,447 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 442 selfloop transitions, 113 changer transitions 0/580 dead transitions. [2024-06-14 12:39:42,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 580 transitions, 9379 flow [2024-06-14 12:39:42,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:39:42,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:39:42,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-14 12:39:42,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-14 12:39:42,449 INFO L175 Difference]: Start difference. First operand has 395 places, 559 transitions, 7607 flow. Second operand 9 states and 159 transitions. [2024-06-14 12:39:42,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 580 transitions, 9379 flow [2024-06-14 12:39:46,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 580 transitions, 9131 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-14 12:39:46,809 INFO L231 Difference]: Finished difference. Result has 398 places, 560 transitions, 7618 flow [2024-06-14 12:39:46,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7359, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7618, PETRI_PLACES=398, PETRI_TRANSITIONS=560} [2024-06-14 12:39:46,809 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 354 predicate places. [2024-06-14 12:39:46,809 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 560 transitions, 7618 flow [2024-06-14 12:39:46,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:46,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:46,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:46,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-14 12:39:46,810 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:46,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:46,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1691907358, now seen corresponding path program 8 times [2024-06-14 12:39:46,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:46,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107477532] [2024-06-14 12:39:46,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:46,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:46,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:47,825 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 12:39:47,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:47,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107477532] [2024-06-14 12:39:47,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107477532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:47,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:47,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:39:47,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86006097] [2024-06-14 12:39:47,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:47,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:39:47,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:47,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:39:47,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:39:47,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:39:47,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 560 transitions, 7618 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:47,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:47,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:39:47,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:49,377 INFO L124 PetriNetUnfolderBase]: 3476/5402 cut-off events. [2024-06-14 12:39:49,377 INFO L125 PetriNetUnfolderBase]: For 1872835/1872843 co-relation queries the response was YES. [2024-06-14 12:39:49,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67271 conditions, 5402 events. 3476/5402 cut-off events. For 1872835/1872843 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 30704 event pairs, 680 based on Foata normal form. 5/5401 useless extension candidates. Maximal degree in co-relation 67078. Up to 4719 conditions per place. [2024-06-14 12:39:49,469 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 445 selfloop transitions, 110 changer transitions 0/580 dead transitions. [2024-06-14 12:39:49,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 580 transitions, 9372 flow [2024-06-14 12:39:49,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:39:49,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:39:49,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-14 12:39:49,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134366925064599 [2024-06-14 12:39:49,470 INFO L175 Difference]: Start difference. First operand has 398 places, 560 transitions, 7618 flow. Second operand 9 states and 160 transitions. [2024-06-14 12:39:49,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 580 transitions, 9372 flow [2024-06-14 12:39:55,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 580 transitions, 8971 flow, removed 74 selfloop flow, removed 9 redundant places. [2024-06-14 12:39:55,115 INFO L231 Difference]: Finished difference. Result has 398 places, 560 transitions, 7443 flow [2024-06-14 12:39:55,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7217, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7443, PETRI_PLACES=398, PETRI_TRANSITIONS=560} [2024-06-14 12:39:55,115 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 354 predicate places. [2024-06-14 12:39:55,115 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 560 transitions, 7443 flow [2024-06-14 12:39:55,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:55,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:39:55,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:39:55,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-14 12:39:55,116 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:39:55,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:39:55,116 INFO L85 PathProgramCache]: Analyzing trace with hash -983530430, now seen corresponding path program 1 times [2024-06-14 12:39:55,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:39:55,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272824525] [2024-06-14 12:39:55,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:39:55,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:39:55,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:39:56,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:39:56,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:39:56,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272824525] [2024-06-14 12:39:56,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272824525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:39:56,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:39:56,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:39:56,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381281657] [2024-06-14 12:39:56,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:39:56,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:39:56,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:39:56,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:39:56,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:39:56,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:39:56,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 560 transitions, 7443 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:39:56,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:39:56,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:39:56,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:39:57,967 INFO L124 PetriNetUnfolderBase]: 3640/5556 cut-off events. [2024-06-14 12:39:57,968 INFO L125 PetriNetUnfolderBase]: For 1859909/1859911 co-relation queries the response was YES. [2024-06-14 12:39:58,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67582 conditions, 5556 events. 3640/5556 cut-off events. For 1859909/1859911 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 30609 event pairs, 769 based on Foata normal form. 2/5555 useless extension candidates. Maximal degree in co-relation 67390. Up to 5402 conditions per place. [2024-06-14 12:39:58,058 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 550 selfloop transitions, 22 changer transitions 0/576 dead transitions. [2024-06-14 12:39:58,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 576 transitions, 8739 flow [2024-06-14 12:39:58,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:39:58,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:39:58,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 143 transitions. [2024-06-14 12:39:58,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3325581395348837 [2024-06-14 12:39:58,059 INFO L175 Difference]: Start difference. First operand has 398 places, 560 transitions, 7443 flow. Second operand 10 states and 143 transitions. [2024-06-14 12:39:58,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 576 transitions, 8739 flow [2024-06-14 12:40:03,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 576 transitions, 8499 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-14 12:40:03,670 INFO L231 Difference]: Finished difference. Result has 401 places, 562 transitions, 7372 flow [2024-06-14 12:40:03,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7203, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7372, PETRI_PLACES=401, PETRI_TRANSITIONS=562} [2024-06-14 12:40:03,671 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 357 predicate places. [2024-06-14 12:40:03,671 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 562 transitions, 7372 flow [2024-06-14 12:40:03,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:03,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:03,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:40:03,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-14 12:40:03,671 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:40:03,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:03,672 INFO L85 PathProgramCache]: Analyzing trace with hash 620854316, now seen corresponding path program 1 times [2024-06-14 12:40:03,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:03,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055172461] [2024-06-14 12:40:03,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:03,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:03,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:04,603 INFO 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 12:40:04,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:04,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055172461] [2024-06-14 12:40:04,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055172461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:04,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:04,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:40:04,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912523896] [2024-06-14 12:40:04,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:04,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:40:04,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:04,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:40:04,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:40:04,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:40:04,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 562 transitions, 7372 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:04,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:04,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:40:04,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:06,257 INFO L124 PetriNetUnfolderBase]: 3656/5594 cut-off events. [2024-06-14 12:40:06,257 INFO L125 PetriNetUnfolderBase]: For 1903443/1903453 co-relation queries the response was YES. [2024-06-14 12:40:06,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67815 conditions, 5594 events. 3656/5594 cut-off events. For 1903443/1903453 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 30907 event pairs, 531 based on Foata normal form. 12/5602 useless extension candidates. Maximal degree in co-relation 67622. Up to 5221 conditions per place. [2024-06-14 12:40:06,357 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 552 selfloop transitions, 40 changer transitions 0/596 dead transitions. [2024-06-14 12:40:06,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 596 transitions, 8792 flow [2024-06-14 12:40:06,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:40:06,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:40:06,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-14 12:40:06,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 12:40:06,359 INFO L175 Difference]: Start difference. First operand has 401 places, 562 transitions, 7372 flow. Second operand 9 states and 153 transitions. [2024-06-14 12:40:06,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 596 transitions, 8792 flow [2024-06-14 12:40:11,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 596 transitions, 8639 flow, removed 56 selfloop flow, removed 8 redundant places. [2024-06-14 12:40:11,990 INFO L231 Difference]: Finished difference. Result has 402 places, 565 transitions, 7449 flow [2024-06-14 12:40:11,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7219, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7449, PETRI_PLACES=402, PETRI_TRANSITIONS=565} [2024-06-14 12:40:11,990 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 358 predicate places. [2024-06-14 12:40:11,990 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 565 transitions, 7449 flow [2024-06-14 12:40:11,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:11,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:11,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:40:11,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-14 12:40:11,991 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:40:11,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:11,991 INFO L85 PathProgramCache]: Analyzing trace with hash -197374898, now seen corresponding path program 2 times [2024-06-14 12:40:11,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:11,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154515746] [2024-06-14 12:40:11,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:11,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:12,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:12,979 INFO 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 12:40:12,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:12,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154515746] [2024-06-14 12:40:12,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154515746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:12,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:12,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:40:12,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229745164] [2024-06-14 12:40:12,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:12,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:40:12,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:12,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:40:12,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:40:13,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:40:13,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 565 transitions, 7449 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:13,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:13,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:40:13,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:14,607 INFO L124 PetriNetUnfolderBase]: 3672/5618 cut-off events. [2024-06-14 12:40:14,608 INFO L125 PetriNetUnfolderBase]: For 1930915/1930925 co-relation queries the response was YES. [2024-06-14 12:40:14,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68553 conditions, 5618 events. 3672/5618 cut-off events. For 1930915/1930925 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 31122 event pairs, 706 based on Foata normal form. 12/5626 useless extension candidates. Maximal degree in co-relation 68359. Up to 5308 conditions per place. [2024-06-14 12:40:14,702 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 548 selfloop transitions, 42 changer transitions 0/594 dead transitions. [2024-06-14 12:40:14,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 594 transitions, 8857 flow [2024-06-14 12:40:14,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:40:14,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:40:14,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-14 12:40:14,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875968992248062 [2024-06-14 12:40:14,703 INFO L175 Difference]: Start difference. First operand has 402 places, 565 transitions, 7449 flow. Second operand 9 states and 150 transitions. [2024-06-14 12:40:14,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 594 transitions, 8857 flow [2024-06-14 12:40:19,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 594 transitions, 8649 flow, removed 66 selfloop flow, removed 7 redundant places. [2024-06-14 12:40:19,728 INFO L231 Difference]: Finished difference. Result has 404 places, 568 transitions, 7481 flow [2024-06-14 12:40:19,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7241, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7481, PETRI_PLACES=404, PETRI_TRANSITIONS=568} [2024-06-14 12:40:19,728 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 360 predicate places. [2024-06-14 12:40:19,729 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 568 transitions, 7481 flow [2024-06-14 12:40:19,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:19,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:19,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:40:19,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-14 12:40:19,729 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:40:19,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:19,730 INFO L85 PathProgramCache]: Analyzing trace with hash -197701328, now seen corresponding path program 3 times [2024-06-14 12:40:19,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:19,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903245155] [2024-06-14 12:40:19,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:19,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:19,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:20,649 INFO 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 12:40:20,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:20,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903245155] [2024-06-14 12:40:20,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903245155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:20,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:20,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:40:20,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353734050] [2024-06-14 12:40:20,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:20,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:40:20,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:20,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:40:20,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:40:20,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:40:20,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 568 transitions, 7481 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:20,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:20,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:40:20,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:22,273 INFO L124 PetriNetUnfolderBase]: 3688/5642 cut-off events. [2024-06-14 12:40:22,273 INFO L125 PetriNetUnfolderBase]: For 1960602/1960612 co-relation queries the response was YES. [2024-06-14 12:40:22,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69030 conditions, 5642 events. 3688/5642 cut-off events. For 1960602/1960612 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 31279 event pairs, 704 based on Foata normal form. 12/5650 useless extension candidates. Maximal degree in co-relation 68835. Up to 5304 conditions per place. [2024-06-14 12:40:22,381 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 547 selfloop transitions, 47 changer transitions 0/598 dead transitions. [2024-06-14 12:40:22,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 598 transitions, 8905 flow [2024-06-14 12:40:22,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:40:22,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:40:22,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-14 12:40:22,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39276485788113696 [2024-06-14 12:40:22,383 INFO L175 Difference]: Start difference. First operand has 404 places, 568 transitions, 7481 flow. Second operand 9 states and 152 transitions. [2024-06-14 12:40:22,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 598 transitions, 8905 flow [2024-06-14 12:40:28,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 598 transitions, 8687 flow, removed 69 selfloop flow, removed 7 redundant places. [2024-06-14 12:40:28,211 INFO L231 Difference]: Finished difference. Result has 406 places, 571 transitions, 7519 flow [2024-06-14 12:40:28,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7263, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7519, PETRI_PLACES=406, PETRI_TRANSITIONS=571} [2024-06-14 12:40:28,211 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 362 predicate places. [2024-06-14 12:40:28,212 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 571 transitions, 7519 flow [2024-06-14 12:40:28,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:28,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:28,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:40:28,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-14 12:40:28,212 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:40:28,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:28,212 INFO L85 PathProgramCache]: Analyzing trace with hash -358065822, now seen corresponding path program 1 times [2024-06-14 12:40:28,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:28,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234607890] [2024-06-14 12:40:28,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:28,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:28,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:29,234 INFO 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 12:40:29,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:29,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234607890] [2024-06-14 12:40:29,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234607890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:29,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:29,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:40:29,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068371062] [2024-06-14 12:40:29,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:29,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:40:29,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:29,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:40:29,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:40:29,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:40:29,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 571 transitions, 7519 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:29,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:29,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:40:29,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:30,831 INFO L124 PetriNetUnfolderBase]: 3698/5656 cut-off events. [2024-06-14 12:40:30,831 INFO L125 PetriNetUnfolderBase]: For 1967421/1967431 co-relation queries the response was YES. [2024-06-14 12:40:30,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69391 conditions, 5656 events. 3698/5656 cut-off events. For 1967421/1967431 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 31362 event pairs, 707 based on Foata normal form. 10/5662 useless extension candidates. Maximal degree in co-relation 69195. Up to 5346 conditions per place. [2024-06-14 12:40:30,929 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 550 selfloop transitions, 47 changer transitions 0/601 dead transitions. [2024-06-14 12:40:30,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 601 transitions, 8973 flow [2024-06-14 12:40:30,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:40:30,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:40:30,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-14 12:40:30,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37906976744186044 [2024-06-14 12:40:30,930 INFO L175 Difference]: Start difference. First operand has 406 places, 571 transitions, 7519 flow. Second operand 10 states and 163 transitions. [2024-06-14 12:40:30,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 601 transitions, 8973 flow [2024-06-14 12:40:37,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 601 transitions, 8739 flow, removed 72 selfloop flow, removed 7 redundant places. [2024-06-14 12:40:37,126 INFO L231 Difference]: Finished difference. Result has 409 places, 575 transitions, 7570 flow [2024-06-14 12:40:37,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7285, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7570, PETRI_PLACES=409, PETRI_TRANSITIONS=575} [2024-06-14 12:40:37,127 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 365 predicate places. [2024-06-14 12:40:37,127 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 575 transitions, 7570 flow [2024-06-14 12:40:37,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:37,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:37,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:40:37,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-14 12:40:37,128 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:40:37,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:37,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1090439394, now seen corresponding path program 1 times [2024-06-14 12:40:37,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:37,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561986410] [2024-06-14 12:40:37,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:37,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:37,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:37,964 INFO 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 12:40:37,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:37,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561986410] [2024-06-14 12:40:37,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561986410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:37,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:37,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:40:37,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126354483] [2024-06-14 12:40:37,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:37,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:40:37,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:37,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:40:37,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:40:38,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:40:38,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 575 transitions, 7570 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:38,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:38,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:40:38,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:39,701 INFO L124 PetriNetUnfolderBase]: 3601/5555 cut-off events. [2024-06-14 12:40:39,701 INFO L125 PetriNetUnfolderBase]: For 1997400/1997414 co-relation queries the response was YES. [2024-06-14 12:40:39,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69246 conditions, 5555 events. 3601/5555 cut-off events. For 1997400/1997414 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 31299 event pairs, 687 based on Foata normal form. 3/5542 useless extension candidates. Maximal degree in co-relation 69049. Up to 4781 conditions per place. [2024-06-14 12:40:39,798 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 482 selfloop transitions, 92 changer transitions 0/614 dead transitions. [2024-06-14 12:40:39,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 614 transitions, 9021 flow [2024-06-14 12:40:39,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:40:39,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:40:39,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 12:40:39,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-14 12:40:39,799 INFO L175 Difference]: Start difference. First operand has 409 places, 575 transitions, 7570 flow. Second operand 8 states and 147 transitions. [2024-06-14 12:40:39,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 614 transitions, 9021 flow [2024-06-14 12:40:46,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 614 transitions, 8764 flow, removed 84 selfloop flow, removed 8 redundant places. [2024-06-14 12:40:46,070 INFO L231 Difference]: Finished difference. Result has 411 places, 588 transitions, 7749 flow [2024-06-14 12:40:46,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7313, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7749, PETRI_PLACES=411, PETRI_TRANSITIONS=588} [2024-06-14 12:40:46,070 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 367 predicate places. [2024-06-14 12:40:46,071 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 588 transitions, 7749 flow [2024-06-14 12:40:46,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:46,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:46,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:40:46,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-14 12:40:46,071 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:40:46,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:46,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1090230857, now seen corresponding path program 1 times [2024-06-14 12:40:46,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:46,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673182316] [2024-06-14 12:40:46,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:46,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:46,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:47,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:40:47,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:47,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673182316] [2024-06-14 12:40:47,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673182316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:47,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:47,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:40:47,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884092919] [2024-06-14 12:40:47,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:47,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:40:47,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:47,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:40:47,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:40:47,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:40:47,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 588 transitions, 7749 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:47,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:47,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:40:47,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:48,603 INFO L124 PetriNetUnfolderBase]: 3595/5540 cut-off events. [2024-06-14 12:40:48,603 INFO L125 PetriNetUnfolderBase]: For 2006615/2006629 co-relation queries the response was YES. [2024-06-14 12:40:48,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69772 conditions, 5540 events. 3595/5540 cut-off events. For 2006615/2006629 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 31158 event pairs, 672 based on Foata normal form. 3/5527 useless extension candidates. Maximal degree in co-relation 69572. Up to 4747 conditions per place. [2024-06-14 12:40:48,702 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 476 selfloop transitions, 98 changer transitions 0/614 dead transitions. [2024-06-14 12:40:48,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 614 transitions, 9003 flow [2024-06-14 12:40:48,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:40:48,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:40:48,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 12:40:48,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-14 12:40:48,703 INFO L175 Difference]: Start difference. First operand has 411 places, 588 transitions, 7749 flow. Second operand 8 states and 150 transitions. [2024-06-14 12:40:48,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 614 transitions, 9003 flow [2024-06-14 12:40:55,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 614 transitions, 8793 flow, removed 62 selfloop flow, removed 3 redundant places. [2024-06-14 12:40:55,090 INFO L231 Difference]: Finished difference. Result has 416 places, 588 transitions, 7751 flow [2024-06-14 12:40:55,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7539, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7751, PETRI_PLACES=416, PETRI_TRANSITIONS=588} [2024-06-14 12:40:55,091 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 372 predicate places. [2024-06-14 12:40:55,091 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 588 transitions, 7751 flow [2024-06-14 12:40:55,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:55,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:40:55,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:40:55,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-14 12:40:55,092 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:40:55,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:40:55,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1090140492, now seen corresponding path program 1 times [2024-06-14 12:40:55,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:40:55,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321383671] [2024-06-14 12:40:55,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:40:55,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:40:55,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:40:55,975 INFO 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 12:40:55,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:40:55,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321383671] [2024-06-14 12:40:55,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321383671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:40:55,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:40:55,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:40:55,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157380898] [2024-06-14 12:40:55,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:40:55,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:40:55,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:40:55,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:40:55,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:40:56,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:40:56,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 588 transitions, 7751 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:40:56,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:40:56,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:40:56,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:40:57,625 INFO L124 PetriNetUnfolderBase]: 3722/5683 cut-off events. [2024-06-14 12:40:57,625 INFO L125 PetriNetUnfolderBase]: For 2053095/2053103 co-relation queries the response was YES. [2024-06-14 12:40:57,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70844 conditions, 5683 events. 3722/5683 cut-off events. For 2053095/2053103 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 31536 event pairs, 714 based on Foata normal form. 5/5684 useless extension candidates. Maximal degree in co-relation 70643. Up to 5064 conditions per place. [2024-06-14 12:40:57,724 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 517 selfloop transitions, 99 changer transitions 0/620 dead transitions. [2024-06-14 12:40:57,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 620 transitions, 9235 flow [2024-06-14 12:40:57,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:40:57,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:40:57,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-14 12:40:57,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40568475452196384 [2024-06-14 12:40:57,725 INFO L175 Difference]: Start difference. First operand has 416 places, 588 transitions, 7751 flow. Second operand 9 states and 157 transitions. [2024-06-14 12:40:57,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 620 transitions, 9235 flow [2024-06-14 12:41:03,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 620 transitions, 9006 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-14 12:41:03,379 INFO L231 Difference]: Finished difference. Result has 418 places, 592 transitions, 7877 flow [2024-06-14 12:41:03,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7534, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7877, PETRI_PLACES=418, PETRI_TRANSITIONS=592} [2024-06-14 12:41:03,386 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 374 predicate places. [2024-06-14 12:41:03,387 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 592 transitions, 7877 flow [2024-06-14 12:41:03,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:03,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:41:03,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:41:03,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-14 12:41:03,387 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:41:03,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:41:03,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1090140864, now seen corresponding path program 2 times [2024-06-14 12:41:03,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:41:03,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563656273] [2024-06-14 12:41:03,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:41:03,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:41:03,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:41:04,257 INFO 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 12:41:04,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:41:04,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563656273] [2024-06-14 12:41:04,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563656273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:41:04,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:41:04,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:41:04,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98181219] [2024-06-14 12:41:04,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:41:04,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:41:04,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:41:04,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:41:04,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:41:04,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:41:04,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 592 transitions, 7877 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:04,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:41:04,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:41:04,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:41:05,987 INFO L124 PetriNetUnfolderBase]: 3651/5631 cut-off events. [2024-06-14 12:41:05,987 INFO L125 PetriNetUnfolderBase]: For 2107403/2107421 co-relation queries the response was YES. [2024-06-14 12:41:06,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71548 conditions, 5631 events. 3651/5631 cut-off events. For 2107403/2107421 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 31858 event pairs, 684 based on Foata normal form. 3/5608 useless extension candidates. Maximal degree in co-relation 71346. Up to 4792 conditions per place. [2024-06-14 12:41:06,089 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 479 selfloop transitions, 102 changer transitions 0/622 dead transitions. [2024-06-14 12:41:06,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 622 transitions, 9585 flow [2024-06-14 12:41:06,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:41:06,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:41:06,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 12:41:06,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-14 12:41:06,090 INFO L175 Difference]: Start difference. First operand has 418 places, 592 transitions, 7877 flow. Second operand 8 states and 147 transitions. [2024-06-14 12:41:06,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 622 transitions, 9585 flow [2024-06-14 12:41:12,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 622 transitions, 9223 flow, removed 63 selfloop flow, removed 8 redundant places. [2024-06-14 12:41:12,255 INFO L231 Difference]: Finished difference. Result has 418 places, 598 transitions, 7898 flow [2024-06-14 12:41:12,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7515, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7898, PETRI_PLACES=418, PETRI_TRANSITIONS=598} [2024-06-14 12:41:12,256 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 374 predicate places. [2024-06-14 12:41:12,256 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 598 transitions, 7898 flow [2024-06-14 12:41:12,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:12,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:41:12,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:41:12,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-14 12:41:12,257 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:41:12,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:41:12,257 INFO L85 PathProgramCache]: Analyzing trace with hash -525444988, now seen corresponding path program 3 times [2024-06-14 12:41:12,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:41:12,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345294377] [2024-06-14 12:41:12,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:41:12,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:41:12,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:41:13,101 INFO 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 12:41:13,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:41:13,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345294377] [2024-06-14 12:41:13,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345294377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:41:13,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:41:13,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:41:13,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073808453] [2024-06-14 12:41:13,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:41:13,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:41:13,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:41:13,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:41:13,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:41:13,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:41:13,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 598 transitions, 7898 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:13,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:41:13,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:41:13,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:41:14,737 INFO L124 PetriNetUnfolderBase]: 3635/5611 cut-off events. [2024-06-14 12:41:14,737 INFO L125 PetriNetUnfolderBase]: For 2094069/2094085 co-relation queries the response was YES. [2024-06-14 12:41:14,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70531 conditions, 5611 events. 3635/5611 cut-off events. For 2094069/2094085 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 31672 event pairs, 685 based on Foata normal form. 7/5602 useless extension candidates. Maximal degree in co-relation 70329. Up to 4821 conditions per place. [2024-06-14 12:41:14,839 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 489 selfloop transitions, 97 changer transitions 0/627 dead transitions. [2024-06-14 12:41:14,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 627 transitions, 9180 flow [2024-06-14 12:41:14,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:41:14,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:41:14,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 12:41:14,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 12:41:14,841 INFO L175 Difference]: Start difference. First operand has 418 places, 598 transitions, 7898 flow. Second operand 8 states and 152 transitions. [2024-06-14 12:41:14,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 627 transitions, 9180 flow [2024-06-14 12:41:20,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 627 transitions, 8971 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-06-14 12:41:20,855 INFO L231 Difference]: Finished difference. Result has 422 places, 598 transitions, 7890 flow [2024-06-14 12:41:20,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7689, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7890, PETRI_PLACES=422, PETRI_TRANSITIONS=598} [2024-06-14 12:41:20,856 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 378 predicate places. [2024-06-14 12:41:20,856 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 598 transitions, 7890 flow [2024-06-14 12:41:20,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:20,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:41:20,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:41:20,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-14 12:41:20,856 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:41:20,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:41:20,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1095681804, now seen corresponding path program 4 times [2024-06-14 12:41:20,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:41:20,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606934002] [2024-06-14 12:41:20,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:41:20,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:41:20,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:41:21,782 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 12:41:21,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:41:21,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606934002] [2024-06-14 12:41:21,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606934002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:41:21,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:41:21,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:41:21,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951058800] [2024-06-14 12:41:21,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:41:21,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:41:21,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:41:21,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:41:21,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:41:21,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:41:21,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 598 transitions, 7890 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:21,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:41:21,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:41:21,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:41:23,430 INFO L124 PetriNetUnfolderBase]: 3661/5640 cut-off events. [2024-06-14 12:41:23,430 INFO L125 PetriNetUnfolderBase]: For 2143491/2143507 co-relation queries the response was YES. [2024-06-14 12:41:23,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71593 conditions, 5640 events. 3661/5640 cut-off events. For 2143491/2143507 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 31768 event pairs, 688 based on Foata normal form. 7/5631 useless extension candidates. Maximal degree in co-relation 71389. Up to 4810 conditions per place. [2024-06-14 12:41:23,528 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 482 selfloop transitions, 108 changer transitions 0/631 dead transitions. [2024-06-14 12:41:23,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 631 transitions, 9644 flow [2024-06-14 12:41:23,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:41:23,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:41:23,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 12:41:23,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-14 12:41:23,529 INFO L175 Difference]: Start difference. First operand has 422 places, 598 transitions, 7890 flow. Second operand 8 states and 153 transitions. [2024-06-14 12:41:23,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 631 transitions, 9644 flow [2024-06-14 12:41:29,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 631 transitions, 9413 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-14 12:41:29,687 INFO L231 Difference]: Finished difference. Result has 422 places, 604 transitions, 8065 flow [2024-06-14 12:41:29,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7659, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8065, PETRI_PLACES=422, PETRI_TRANSITIONS=604} [2024-06-14 12:41:29,688 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 378 predicate places. [2024-06-14 12:41:29,688 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 604 transitions, 8065 flow [2024-06-14 12:41:29,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:29,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:41:29,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:41:29,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-14 12:41:29,688 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:41:29,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:41:29,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1086427374, now seen corresponding path program 5 times [2024-06-14 12:41:29,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:41:29,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842327506] [2024-06-14 12:41:29,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:41:29,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:41:29,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:41:30,503 INFO 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 12:41:30,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:41:30,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842327506] [2024-06-14 12:41:30,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842327506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:41:30,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:41:30,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:41:30,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827777583] [2024-06-14 12:41:30,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:41:30,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:41:30,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:41:30,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:41:30,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:41:30,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:41:30,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 604 transitions, 8065 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:30,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:41:30,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:41:30,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:41:32,081 INFO L124 PetriNetUnfolderBase]: 3681/5668 cut-off events. [2024-06-14 12:41:32,081 INFO L125 PetriNetUnfolderBase]: For 2196179/2196197 co-relation queries the response was YES. [2024-06-14 12:41:32,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72390 conditions, 5668 events. 3681/5668 cut-off events. For 2196179/2196197 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 31987 event pairs, 709 based on Foata normal form. 3/5645 useless extension candidates. Maximal degree in co-relation 72187. Up to 4660 conditions per place. [2024-06-14 12:41:32,180 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 445 selfloop transitions, 143 changer transitions 0/629 dead transitions. [2024-06-14 12:41:32,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 629 transitions, 10010 flow [2024-06-14 12:41:32,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:41:32,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:41:32,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-14 12:41:32,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-14 12:41:32,181 INFO L175 Difference]: Start difference. First operand has 422 places, 604 transitions, 8065 flow. Second operand 8 states and 149 transitions. [2024-06-14 12:41:32,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 629 transitions, 10010 flow [2024-06-14 12:41:38,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 629 transitions, 9815 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-14 12:41:38,326 INFO L231 Difference]: Finished difference. Result has 426 places, 607 transitions, 8257 flow [2024-06-14 12:41:38,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7870, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8257, PETRI_PLACES=426, PETRI_TRANSITIONS=607} [2024-06-14 12:41:38,327 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 382 predicate places. [2024-06-14 12:41:38,327 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 607 transitions, 8257 flow [2024-06-14 12:41:38,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:38,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:41:38,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:41:38,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-14 12:41:38,327 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:41:38,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:41:38,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1086421422, now seen corresponding path program 2 times [2024-06-14 12:41:38,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:41:38,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725477011] [2024-06-14 12:41:38,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:41:38,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:41:38,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:41:39,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:41:39,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:41:39,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725477011] [2024-06-14 12:41:39,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725477011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:41:39,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:41:39,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:41:39,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206594210] [2024-06-14 12:41:39,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:41:39,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:41:39,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:41:39,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:41:39,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:41:39,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:41:39,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 607 transitions, 8257 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:39,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:41:39,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:41:39,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:41:41,199 INFO L124 PetriNetUnfolderBase]: 3846/5867 cut-off events. [2024-06-14 12:41:41,200 INFO L125 PetriNetUnfolderBase]: For 2288656/2288664 co-relation queries the response was YES. [2024-06-14 12:41:41,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75128 conditions, 5867 events. 3846/5867 cut-off events. For 2288656/2288664 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 32693 event pairs, 725 based on Foata normal form. 5/5868 useless extension candidates. Maximal degree in co-relation 74923. Up to 5148 conditions per place. [2024-06-14 12:41:41,310 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 521 selfloop transitions, 121 changer transitions 0/646 dead transitions. [2024-06-14 12:41:41,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 646 transitions, 10645 flow [2024-06-14 12:41:41,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:41:41,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:41:41,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-14 12:41:41,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160206718346253 [2024-06-14 12:41:41,312 INFO L175 Difference]: Start difference. First operand has 426 places, 607 transitions, 8257 flow. Second operand 9 states and 161 transitions. [2024-06-14 12:41:41,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 646 transitions, 10645 flow [2024-06-14 12:41:47,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 646 transitions, 9973 flow, removed 48 selfloop flow, removed 9 redundant places. [2024-06-14 12:41:47,455 INFO L231 Difference]: Finished difference. Result has 426 places, 619 transitions, 8250 flow [2024-06-14 12:41:47,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7585, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8250, PETRI_PLACES=426, PETRI_TRANSITIONS=619} [2024-06-14 12:41:47,456 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 382 predicate places. [2024-06-14 12:41:47,456 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 619 transitions, 8250 flow [2024-06-14 12:41:47,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:47,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:41:47,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:41:47,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-14 12:41:47,457 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:41:47,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:41:47,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1086415625, now seen corresponding path program 1 times [2024-06-14 12:41:47,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:41:47,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376440106] [2024-06-14 12:41:47,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:41:47,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:41:47,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:41:48,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:41:48,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:41:48,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376440106] [2024-06-14 12:41:48,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376440106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:41:48,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:41:48,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:41:48,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955288744] [2024-06-14 12:41:48,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:41:48,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:41:48,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:41:48,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:41:48,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:41:48,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:41:48,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 619 transitions, 8250 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:48,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:41:48,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:41:48,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:41:50,059 INFO L124 PetriNetUnfolderBase]: 3856/5878 cut-off events. [2024-06-14 12:41:50,060 INFO L125 PetriNetUnfolderBase]: For 2303483/2303491 co-relation queries the response was YES. [2024-06-14 12:41:50,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74789 conditions, 5878 events. 3856/5878 cut-off events. For 2303483/2303491 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 32759 event pairs, 716 based on Foata normal form. 6/5880 useless extension candidates. Maximal degree in co-relation 74586. Up to 5568 conditions per place. [2024-06-14 12:41:50,169 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 598 selfloop transitions, 43 changer transitions 0/645 dead transitions. [2024-06-14 12:41:50,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 645 transitions, 9707 flow [2024-06-14 12:41:50,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:41:50,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:41:50,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-14 12:41:50,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3798449612403101 [2024-06-14 12:41:50,171 INFO L175 Difference]: Start difference. First operand has 426 places, 619 transitions, 8250 flow. Second operand 9 states and 147 transitions. [2024-06-14 12:41:50,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 645 transitions, 9707 flow [2024-06-14 12:41:58,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 645 transitions, 9396 flow, removed 104 selfloop flow, removed 4 redundant places. [2024-06-14 12:41:58,035 INFO L231 Difference]: Finished difference. Result has 431 places, 623 transitions, 8145 flow [2024-06-14 12:41:58,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7939, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=576, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8145, PETRI_PLACES=431, PETRI_TRANSITIONS=623} [2024-06-14 12:41:58,036 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 387 predicate places. [2024-06-14 12:41:58,036 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 623 transitions, 8145 flow [2024-06-14 12:41:58,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:58,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:41:58,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:41:58,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-14 12:41:58,037 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:41:58,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:41:58,037 INFO L85 PathProgramCache]: Analyzing trace with hash -525111676, now seen corresponding path program 3 times [2024-06-14 12:41:58,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:41:58,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116901230] [2024-06-14 12:41:58,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:41:58,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:41:58,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:41:58,909 INFO 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 12:41:58,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:41:58,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116901230] [2024-06-14 12:41:58,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116901230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:41:58,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:41:58,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:41:58,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562400594] [2024-06-14 12:41:58,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:41:58,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:41:58,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:41:58,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:41:58,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:41:58,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:41:58,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 623 transitions, 8145 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:41:58,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:41:58,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:41:58,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:42:00,662 INFO L124 PetriNetUnfolderBase]: 3844/5865 cut-off events. [2024-06-14 12:42:00,662 INFO L125 PetriNetUnfolderBase]: For 2303090/2303098 co-relation queries the response was YES. [2024-06-14 12:42:00,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73846 conditions, 5865 events. 3844/5865 cut-off events. For 2303090/2303098 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 32733 event pairs, 717 based on Foata normal form. 5/5866 useless extension candidates. Maximal degree in co-relation 73641. Up to 5152 conditions per place. [2024-06-14 12:42:00,772 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 522 selfloop transitions, 123 changer transitions 0/649 dead transitions. [2024-06-14 12:42:00,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 649 transitions, 9839 flow [2024-06-14 12:42:00,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:42:00,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:42:00,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-14 12:42:00,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-14 12:42:00,773 INFO L175 Difference]: Start difference. First operand has 431 places, 623 transitions, 8145 flow. Second operand 9 states and 159 transitions. [2024-06-14 12:42:00,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 649 transitions, 9839 flow [2024-06-14 12:42:06,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 649 transitions, 9626 flow, removed 66 selfloop flow, removed 7 redundant places. [2024-06-14 12:42:06,766 INFO L231 Difference]: Finished difference. Result has 433 places, 623 transitions, 8185 flow [2024-06-14 12:42:06,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7932, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8185, PETRI_PLACES=433, PETRI_TRANSITIONS=623} [2024-06-14 12:42:06,767 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 389 predicate places. [2024-06-14 12:42:06,767 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 623 transitions, 8185 flow [2024-06-14 12:42:06,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:42:06,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:06,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:42:06,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-14 12:42:06,768 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:42:06,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:06,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1086421794, now seen corresponding path program 6 times [2024-06-14 12:42:06,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:06,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259727342] [2024-06-14 12:42:06,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:06,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:06,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:42:07,601 INFO 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 12:42:07,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:42:07,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259727342] [2024-06-14 12:42:07,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259727342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:42:07,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:42:07,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:42:07,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787188383] [2024-06-14 12:42:07,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:42:07,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:42:07,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:42:07,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:42:07,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:42:07,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:42:07,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 623 transitions, 8185 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:42:07,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:42:07,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:42:07,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:42:09,207 INFO L124 PetriNetUnfolderBase]: 3743/5773 cut-off events. [2024-06-14 12:42:09,207 INFO L125 PetriNetUnfolderBase]: For 2340264/2340282 co-relation queries the response was YES. [2024-06-14 12:42:09,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74089 conditions, 5773 events. 3743/5773 cut-off events. For 2340264/2340282 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 32777 event pairs, 708 based on Foata normal form. 3/5750 useless extension candidates. Maximal degree in co-relation 73883. Up to 4738 conditions per place. [2024-06-14 12:42:09,318 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 463 selfloop transitions, 140 changer transitions 0/647 dead transitions. [2024-06-14 12:42:09,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 647 transitions, 9858 flow [2024-06-14 12:42:09,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:42:09,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:42:09,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 12:42:09,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-14 12:42:09,319 INFO L175 Difference]: Start difference. First operand has 433 places, 623 transitions, 8185 flow. Second operand 8 states and 147 transitions. [2024-06-14 12:42:09,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 647 transitions, 9858 flow [2024-06-14 12:42:15,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 647 transitions, 9613 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-14 12:42:15,360 INFO L231 Difference]: Finished difference. Result has 434 places, 626 transitions, 8307 flow [2024-06-14 12:42:15,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7940, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8307, PETRI_PLACES=434, PETRI_TRANSITIONS=626} [2024-06-14 12:42:15,361 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 390 predicate places. [2024-06-14 12:42:15,361 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 626 transitions, 8307 flow [2024-06-14 12:42:15,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:42:15,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:15,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:42:15,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-14 12:42:15,362 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:42:15,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:15,362 INFO L85 PathProgramCache]: Analyzing trace with hash -51014426, now seen corresponding path program 4 times [2024-06-14 12:42:15,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:15,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973842976] [2024-06-14 12:42:15,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:15,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:15,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:42:16,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:42:16,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:42:16,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973842976] [2024-06-14 12:42:16,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973842976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:42:16,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:42:16,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:42:16,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023444361] [2024-06-14 12:42:16,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:42:16,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:42:16,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:42:16,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:42:16,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:42:16,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:42:16,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 626 transitions, 8307 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:42:16,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:42:16,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:42:16,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:42:18,258 INFO L124 PetriNetUnfolderBase]: 3938/5999 cut-off events. [2024-06-14 12:42:18,258 INFO L125 PetriNetUnfolderBase]: For 2453785/2453793 co-relation queries the response was YES. [2024-06-14 12:42:18,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77344 conditions, 5999 events. 3938/5999 cut-off events. For 2453785/2453793 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 33453 event pairs, 762 based on Foata normal form. 5/6000 useless extension candidates. Maximal degree in co-relation 77137. Up to 4917 conditions per place. [2024-06-14 12:42:18,357 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 495 selfloop transitions, 162 changer transitions 0/661 dead transitions. [2024-06-14 12:42:18,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 661 transitions, 10749 flow [2024-06-14 12:42:18,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:42:18,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:42:18,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-14 12:42:18,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082687338501292 [2024-06-14 12:42:18,358 INFO L175 Difference]: Start difference. First operand has 434 places, 626 transitions, 8307 flow. Second operand 9 states and 158 transitions. [2024-06-14 12:42:18,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 661 transitions, 10749 flow [2024-06-14 12:42:26,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 661 transitions, 10486 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-14 12:42:26,366 INFO L231 Difference]: Finished difference. Result has 439 places, 637 transitions, 8778 flow [2024-06-14 12:42:26,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8044, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8778, PETRI_PLACES=439, PETRI_TRANSITIONS=637} [2024-06-14 12:42:26,367 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 395 predicate places. [2024-06-14 12:42:26,367 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 637 transitions, 8778 flow [2024-06-14 12:42:26,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:42:26,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:26,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:42:26,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-14 12:42:26,368 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:42:26,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:26,368 INFO L85 PathProgramCache]: Analyzing trace with hash 117045849, now seen corresponding path program 2 times [2024-06-14 12:42:26,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:26,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928266486] [2024-06-14 12:42:26,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:26,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:26,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:42:27,329 INFO 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 12:42:27,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:42:27,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928266486] [2024-06-14 12:42:27,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928266486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:42:27,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:42:27,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:42:27,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276122114] [2024-06-14 12:42:27,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:42:27,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:42:27,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:42:27,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:42:27,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:42:27,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:42:27,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 637 transitions, 8778 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:42:27,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:42:27,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:42:27,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:42:29,071 INFO L124 PetriNetUnfolderBase]: 3964/6042 cut-off events. [2024-06-14 12:42:29,072 INFO L125 PetriNetUnfolderBase]: For 2495069/2495077 co-relation queries the response was YES. [2024-06-14 12:42:29,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79082 conditions, 6042 events. 3964/6042 cut-off events. For 2495069/2495077 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 33818 event pairs, 711 based on Foata normal form. 6/6044 useless extension candidates. Maximal degree in co-relation 78873. Up to 5569 conditions per place. [2024-06-14 12:42:29,192 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 570 selfloop transitions, 91 changer transitions 0/665 dead transitions. [2024-06-14 12:42:29,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 665 transitions, 10992 flow [2024-06-14 12:42:29,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:42:29,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:42:29,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-14 12:42:29,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875968992248062 [2024-06-14 12:42:29,194 INFO L175 Difference]: Start difference. First operand has 439 places, 637 transitions, 8778 flow. Second operand 9 states and 150 transitions. [2024-06-14 12:42:29,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 665 transitions, 10992 flow [2024-06-14 12:42:38,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 665 transitions, 10683 flow, removed 104 selfloop flow, removed 4 redundant places. [2024-06-14 12:42:38,051 INFO L231 Difference]: Finished difference. Result has 444 places, 645 transitions, 8886 flow [2024-06-14 12:42:38,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8469, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8886, PETRI_PLACES=444, PETRI_TRANSITIONS=645} [2024-06-14 12:42:38,052 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 400 predicate places. [2024-06-14 12:42:38,052 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 645 transitions, 8886 flow [2024-06-14 12:42:38,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:42:38,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:38,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:42:38,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-14 12:42:38,053 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:42:38,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:38,053 INFO L85 PathProgramCache]: Analyzing trace with hash 117045632, now seen corresponding path program 5 times [2024-06-14 12:42:38,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:38,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453065779] [2024-06-14 12:42:38,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:38,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:38,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:42:39,018 INFO 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 12:42:39,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:42:39,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453065779] [2024-06-14 12:42:39,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453065779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:42:39,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:42:39,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:42:39,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591532258] [2024-06-14 12:42:39,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:42:39,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:42:39,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:42:39,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:42:39,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:42:39,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:42:39,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 645 transitions, 8886 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:42:39,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:42:39,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:42:39,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:42:40,942 INFO L124 PetriNetUnfolderBase]: 3984/6072 cut-off events. [2024-06-14 12:42:40,943 INFO L125 PetriNetUnfolderBase]: For 2546006/2546014 co-relation queries the response was YES. [2024-06-14 12:42:41,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79324 conditions, 6072 events. 3984/6072 cut-off events. For 2546006/2546014 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 33933 event pairs, 749 based on Foata normal form. 5/6073 useless extension candidates. Maximal degree in co-relation 79113. Up to 4969 conditions per place. [2024-06-14 12:42:41,074 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 492 selfloop transitions, 177 changer transitions 0/673 dead transitions. [2024-06-14 12:42:41,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 673 transitions, 11082 flow [2024-06-14 12:42:41,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:42:41,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:42:41,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-14 12:42:41,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40568475452196384 [2024-06-14 12:42:41,075 INFO L175 Difference]: Start difference. First operand has 444 places, 645 transitions, 8886 flow. Second operand 9 states and 157 transitions. [2024-06-14 12:42:41,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 673 transitions, 11082 flow [2024-06-14 12:42:49,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 673 transitions, 10900 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-14 12:42:49,776 INFO L231 Difference]: Finished difference. Result has 448 places, 649 transitions, 9167 flow [2024-06-14 12:42:49,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8704, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9167, PETRI_PLACES=448, PETRI_TRANSITIONS=649} [2024-06-14 12:42:49,777 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 404 predicate places. [2024-06-14 12:42:49,777 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 649 transitions, 9167 flow [2024-06-14 12:42:49,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:42:49,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:42:49,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:42:49,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-14 12:42:49,777 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:42:49,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:42:49,778 INFO L85 PathProgramCache]: Analyzing trace with hash -43390069, now seen corresponding path program 3 times [2024-06-14 12:42:49,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:42:49,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136999802] [2024-06-14 12:42:49,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:42:49,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:42:49,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:42:50,692 INFO 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 12:42:50,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:42:50,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136999802] [2024-06-14 12:42:50,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136999802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:42:50,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:42:50,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:42:50,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286798990] [2024-06-14 12:42:50,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:42:50,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:42:50,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:42:50,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:42:50,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:42:50,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:42:50,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 649 transitions, 9167 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:42:50,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:42:50,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:42:50,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:42:52,813 INFO L124 PetriNetUnfolderBase]: 3978/6062 cut-off events. [2024-06-14 12:42:52,813 INFO L125 PetriNetUnfolderBase]: For 2531256/2531264 co-relation queries the response was YES. [2024-06-14 12:42:52,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79491 conditions, 6062 events. 3978/6062 cut-off events. For 2531256/2531264 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 33949 event pairs, 711 based on Foata normal form. 6/6064 useless extension candidates. Maximal degree in co-relation 79279. Up to 5592 conditions per place. [2024-06-14 12:42:52,921 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 572 selfloop transitions, 92 changer transitions 0/668 dead transitions. [2024-06-14 12:42:52,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 668 transitions, 10859 flow [2024-06-14 12:42:52,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:42:52,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:42:52,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-14 12:42:52,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38242894056847543 [2024-06-14 12:42:52,922 INFO L175 Difference]: Start difference. First operand has 448 places, 649 transitions, 9167 flow. Second operand 9 states and 148 transitions. [2024-06-14 12:42:52,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 668 transitions, 10859 flow [2024-06-14 12:43:00,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 668 transitions, 10427 flow, removed 72 selfloop flow, removed 6 redundant places. [2024-06-14 12:43:00,294 INFO L231 Difference]: Finished difference. Result has 451 places, 649 transitions, 8930 flow [2024-06-14 12:43:00,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8735, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8930, PETRI_PLACES=451, PETRI_TRANSITIONS=649} [2024-06-14 12:43:00,294 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 407 predicate places. [2024-06-14 12:43:00,295 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 649 transitions, 8930 flow [2024-06-14 12:43:00,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:00,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:00,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:43:00,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-14 12:43:00,295 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:43:00,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:00,296 INFO L85 PathProgramCache]: Analyzing trace with hash 938635905, now seen corresponding path program 4 times [2024-06-14 12:43:00,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:00,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585900290] [2024-06-14 12:43:00,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:00,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:00,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:01,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:43:01,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:01,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585900290] [2024-06-14 12:43:01,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585900290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:01,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:01,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:43:01,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442851449] [2024-06-14 12:43:01,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:01,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:43:01,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:01,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:43:01,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:43:01,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:43:01,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 649 transitions, 8930 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:01,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:01,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:43:01,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:03,068 INFO L124 PetriNetUnfolderBase]: 3980/6067 cut-off events. [2024-06-14 12:43:03,068 INFO L125 PetriNetUnfolderBase]: For 2548171/2548179 co-relation queries the response was YES. [2024-06-14 12:43:03,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79043 conditions, 6067 events. 3980/6067 cut-off events. For 2548171/2548179 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 33955 event pairs, 711 based on Foata normal form. 6/6069 useless extension candidates. Maximal degree in co-relation 78830. Up to 5593 conditions per place. [2024-06-14 12:43:03,191 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 573 selfloop transitions, 94 changer transitions 0/671 dead transitions. [2024-06-14 12:43:03,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 671 transitions, 10728 flow [2024-06-14 12:43:03,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:43:03,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:43:03,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-14 12:43:03,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875968992248062 [2024-06-14 12:43:03,192 INFO L175 Difference]: Start difference. First operand has 451 places, 649 transitions, 8930 flow. Second operand 9 states and 150 transitions. [2024-06-14 12:43:03,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 671 transitions, 10728 flow [2024-06-14 12:43:11,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 671 transitions, 10570 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 12:43:11,928 INFO L231 Difference]: Finished difference. Result has 453 places, 652 transitions, 9067 flow [2024-06-14 12:43:11,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8774, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9067, PETRI_PLACES=453, PETRI_TRANSITIONS=652} [2024-06-14 12:43:11,929 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 409 predicate places. [2024-06-14 12:43:11,929 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 652 transitions, 9067 flow [2024-06-14 12:43:11,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:11,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:11,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:43:11,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-14 12:43:11,929 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:43:11,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:11,930 INFO L85 PathProgramCache]: Analyzing trace with hash -51008846, now seen corresponding path program 6 times [2024-06-14 12:43:11,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:11,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611847287] [2024-06-14 12:43:11,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:11,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:11,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:12,842 INFO 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 12:43:12,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:12,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611847287] [2024-06-14 12:43:12,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611847287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:12,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:12,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:43:12,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311413871] [2024-06-14 12:43:12,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:12,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:43:12,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:12,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:43:12,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:43:12,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:43:12,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 652 transitions, 9067 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:12,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:12,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:43:12,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:14,825 INFO L124 PetriNetUnfolderBase]: 3968/6051 cut-off events. [2024-06-14 12:43:14,826 INFO L125 PetriNetUnfolderBase]: For 2556223/2556231 co-relation queries the response was YES. [2024-06-14 12:43:14,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78487 conditions, 6051 events. 3968/6051 cut-off events. For 2556223/2556231 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 33866 event pairs, 757 based on Foata normal form. 5/6052 useless extension candidates. Maximal degree in co-relation 78273. Up to 4956 conditions per place. [2024-06-14 12:43:14,945 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 507 selfloop transitions, 165 changer transitions 0/676 dead transitions. [2024-06-14 12:43:14,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 676 transitions, 10877 flow [2024-06-14 12:43:14,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:43:14,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:43:14,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-14 12:43:14,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-14 12:43:14,946 INFO L175 Difference]: Start difference. First operand has 453 places, 652 transitions, 9067 flow. Second operand 9 states and 159 transitions. [2024-06-14 12:43:14,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 676 transitions, 10877 flow [2024-06-14 12:43:22,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 676 transitions, 10615 flow, removed 70 selfloop flow, removed 6 redundant places. [2024-06-14 12:43:22,992 INFO L231 Difference]: Finished difference. Result has 456 places, 652 transitions, 9142 flow [2024-06-14 12:43:22,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8805, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9142, PETRI_PLACES=456, PETRI_TRANSITIONS=652} [2024-06-14 12:43:22,992 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 412 predicate places. [2024-06-14 12:43:22,992 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 652 transitions, 9142 flow [2024-06-14 12:43:22,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:22,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:22,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:43:22,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-14 12:43:22,993 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:43:22,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:22,993 INFO L85 PathProgramCache]: Analyzing trace with hash -43780328, now seen corresponding path program 4 times [2024-06-14 12:43:22,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:22,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024701831] [2024-06-14 12:43:22,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:22,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:23,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:24,018 INFO 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 12:43:24,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:24,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024701831] [2024-06-14 12:43:24,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024701831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:24,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:24,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:43:24,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484705835] [2024-06-14 12:43:24,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:24,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:43:24,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:24,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:43:24,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:43:24,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:43:24,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 652 transitions, 9142 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:24,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:24,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:43:24,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:25,972 INFO L124 PetriNetUnfolderBase]: 3984/6065 cut-off events. [2024-06-14 12:43:25,972 INFO L125 PetriNetUnfolderBase]: For 2592195/2592203 co-relation queries the response was YES. [2024-06-14 12:43:26,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79221 conditions, 6065 events. 3984/6065 cut-off events. For 2592195/2592203 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 33869 event pairs, 722 based on Foata normal form. 8/6069 useless extension candidates. Maximal degree in co-relation 79006. Up to 5659 conditions per place. [2024-06-14 12:43:26,091 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 600 selfloop transitions, 70 changer transitions 0/674 dead transitions. [2024-06-14 12:43:26,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 674 transitions, 10704 flow [2024-06-14 12:43:26,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:43:26,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:43:26,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-14 12:43:26,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3772609819121447 [2024-06-14 12:43:26,093 INFO L175 Difference]: Start difference. First operand has 456 places, 652 transitions, 9142 flow. Second operand 9 states and 146 transitions. [2024-06-14 12:43:26,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 674 transitions, 10704 flow [2024-06-14 12:43:33,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 674 transitions, 10354 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-14 12:43:33,987 INFO L231 Difference]: Finished difference. Result has 457 places, 655 transitions, 9110 flow [2024-06-14 12:43:33,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8792, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9110, PETRI_PLACES=457, PETRI_TRANSITIONS=655} [2024-06-14 12:43:33,988 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 413 predicate places. [2024-06-14 12:43:33,988 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 655 transitions, 9110 flow [2024-06-14 12:43:33,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:33,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:33,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:43:33,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-14 12:43:33,988 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:43:33,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:33,989 INFO L85 PathProgramCache]: Analyzing trace with hash -54505088, now seen corresponding path program 5 times [2024-06-14 12:43:33,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:33,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837349436] [2024-06-14 12:43:33,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:33,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:33,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:34,978 INFO 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 12:43:34,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:34,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837349436] [2024-06-14 12:43:34,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837349436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:34,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:34,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:43:34,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539345571] [2024-06-14 12:43:34,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:34,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:43:34,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:34,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:43:34,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:43:35,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:43:35,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 655 transitions, 9110 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:35,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:35,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:43:35,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:37,095 INFO L124 PetriNetUnfolderBase]: 4000/6097 cut-off events. [2024-06-14 12:43:37,095 INFO L125 PetriNetUnfolderBase]: For 2627968/2627976 co-relation queries the response was YES. [2024-06-14 12:43:37,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79679 conditions, 6097 events. 4000/6097 cut-off events. For 2627968/2627976 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 34132 event pairs, 711 based on Foata normal form. 8/6101 useless extension candidates. Maximal degree in co-relation 79463. Up to 5683 conditions per place. [2024-06-14 12:43:37,215 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 602 selfloop transitions, 71 changer transitions 0/677 dead transitions. [2024-06-14 12:43:37,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 677 transitions, 10684 flow [2024-06-14 12:43:37,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:43:37,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:43:37,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-14 12:43:37,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3798449612403101 [2024-06-14 12:43:37,217 INFO L175 Difference]: Start difference. First operand has 457 places, 655 transitions, 9110 flow. Second operand 9 states and 147 transitions. [2024-06-14 12:43:37,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 677 transitions, 10684 flow [2024-06-14 12:43:45,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 677 transitions, 10388 flow, removed 80 selfloop flow, removed 7 redundant places. [2024-06-14 12:43:45,433 INFO L231 Difference]: Finished difference. Result has 459 places, 658 transitions, 9140 flow [2024-06-14 12:43:45,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8814, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9140, PETRI_PLACES=459, PETRI_TRANSITIONS=658} [2024-06-14 12:43:45,434 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 415 predicate places. [2024-06-14 12:43:45,434 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 658 transitions, 9140 flow [2024-06-14 12:43:45,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:45,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:45,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:43:45,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-14 12:43:45,435 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:43:45,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:45,435 INFO L85 PathProgramCache]: Analyzing trace with hash -54831518, now seen corresponding path program 6 times [2024-06-14 12:43:45,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:45,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595581077] [2024-06-14 12:43:45,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:45,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:45,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:46,442 INFO 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 12:43:46,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:46,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595581077] [2024-06-14 12:43:46,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595581077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:46,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:46,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:43:46,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341177876] [2024-06-14 12:43:46,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:46,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:43:46,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:46,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:43:46,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:43:46,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:43:46,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 658 transitions, 9140 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:46,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:46,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:43:46,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:43:48,419 INFO L124 PetriNetUnfolderBase]: 4016/6121 cut-off events. [2024-06-14 12:43:48,420 INFO L125 PetriNetUnfolderBase]: For 2661946/2661954 co-relation queries the response was YES. [2024-06-14 12:43:48,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80173 conditions, 6121 events. 4016/6121 cut-off events. For 2661946/2661954 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 34334 event pairs, 709 based on Foata normal form. 8/6125 useless extension candidates. Maximal degree in co-relation 79956. Up to 5667 conditions per place. [2024-06-14 12:43:48,536 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 598 selfloop transitions, 79 changer transitions 0/681 dead transitions. [2024-06-14 12:43:48,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 681 transitions, 10730 flow [2024-06-14 12:43:48,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:43:48,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:43:48,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-14 12:43:48,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38242894056847543 [2024-06-14 12:43:48,537 INFO L175 Difference]: Start difference. First operand has 459 places, 658 transitions, 9140 flow. Second operand 9 states and 148 transitions. [2024-06-14 12:43:48,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 681 transitions, 10730 flow [2024-06-14 12:43:56,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 681 transitions, 10426 flow, removed 83 selfloop flow, removed 7 redundant places. [2024-06-14 12:43:56,962 INFO L231 Difference]: Finished difference. Result has 461 places, 661 transitions, 9184 flow [2024-06-14 12:43:56,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8836, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9184, PETRI_PLACES=461, PETRI_TRANSITIONS=661} [2024-06-14 12:43:56,963 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 417 predicate places. [2024-06-14 12:43:56,963 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 661 transitions, 9184 flow [2024-06-14 12:43:56,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:56,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:43:56,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:43:56,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-14 12:43:56,964 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:43:56,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:43:56,964 INFO L85 PathProgramCache]: Analyzing trace with hash -43393634, now seen corresponding path program 2 times [2024-06-14 12:43:56,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:43:56,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573714006] [2024-06-14 12:43:56,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:43:56,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:43:56,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:43:58,185 INFO 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 12:43:58,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:43:58,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573714006] [2024-06-14 12:43:58,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573714006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:43:58,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:43:58,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:43:58,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401375242] [2024-06-14 12:43:58,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:43:58,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:43:58,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:43:58,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:43:58,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:43:58,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:43:58,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 661 transitions, 9184 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:43:58,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:43:58,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:43:58,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:44:00,270 INFO L124 PetriNetUnfolderBase]: 4068/6198 cut-off events. [2024-06-14 12:44:00,271 INFO L125 PetriNetUnfolderBase]: For 2741276/2741284 co-relation queries the response was YES. [2024-06-14 12:44:00,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82434 conditions, 6198 events. 4068/6198 cut-off events. For 2741276/2741284 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 34841 event pairs, 709 based on Foata normal form. 6/6200 useless extension candidates. Maximal degree in co-relation 82216. Up to 5651 conditions per place. [2024-06-14 12:44:00,391 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 588 selfloop transitions, 103 changer transitions 0/695 dead transitions. [2024-06-14 12:44:00,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 695 transitions, 11926 flow [2024-06-14 12:44:00,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:44:00,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:44:00,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-14 12:44:00,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3813953488372093 [2024-06-14 12:44:00,393 INFO L175 Difference]: Start difference. First operand has 461 places, 661 transitions, 9184 flow. Second operand 10 states and 164 transitions. [2024-06-14 12:44:00,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 695 transitions, 11926 flow [2024-06-14 12:44:09,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 695 transitions, 11600 flow, removed 86 selfloop flow, removed 7 redundant places. [2024-06-14 12:44:09,949 INFO L231 Difference]: Finished difference. Result has 466 places, 673 transitions, 9718 flow [2024-06-14 12:44:09,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8858, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9718, PETRI_PLACES=466, PETRI_TRANSITIONS=673} [2024-06-14 12:44:09,950 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 422 predicate places. [2024-06-14 12:44:09,950 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 673 transitions, 9718 flow [2024-06-14 12:44:09,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:09,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:44:09,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:44:09,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-14 12:44:09,950 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:44:09,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:44:09,951 INFO L85 PathProgramCache]: Analyzing trace with hash 106209644, now seen corresponding path program 3 times [2024-06-14 12:44:09,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:44:09,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992777333] [2024-06-14 12:44:09,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:44:09,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:44:09,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:44:10,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:44:10,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:44:10,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992777333] [2024-06-14 12:44:10,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992777333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:44:10,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:44:10,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:44:10,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574342863] [2024-06-14 12:44:10,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:44:10,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:44:10,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:44:10,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:44:10,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:44:11,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:44:11,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 673 transitions, 9718 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:11,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:44:11,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:44:11,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:44:13,179 INFO L124 PetriNetUnfolderBase]: 4086/6222 cut-off events. [2024-06-14 12:44:13,180 INFO L125 PetriNetUnfolderBase]: For 2792671/2792679 co-relation queries the response was YES. [2024-06-14 12:44:13,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83674 conditions, 6222 events. 4086/6222 cut-off events. For 2792671/2792679 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 34948 event pairs, 713 based on Foata normal form. 6/6224 useless extension candidates. Maximal degree in co-relation 83453. Up to 5670 conditions per place. [2024-06-14 12:44:13,293 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 585 selfloop transitions, 113 changer transitions 0/702 dead transitions. [2024-06-14 12:44:13,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 702 transitions, 12248 flow [2024-06-14 12:44:13,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:44:13,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:44:13,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-14 12:44:13,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.386046511627907 [2024-06-14 12:44:13,295 INFO L175 Difference]: Start difference. First operand has 466 places, 673 transitions, 9718 flow. Second operand 10 states and 166 transitions. [2024-06-14 12:44:13,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 702 transitions, 12248 flow [2024-06-14 12:44:23,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 702 transitions, 11803 flow, removed 183 selfloop flow, removed 5 redundant places. [2024-06-14 12:44:23,046 INFO L231 Difference]: Finished difference. Result has 471 places, 681 transitions, 9938 flow [2024-06-14 12:44:23,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9345, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9938, PETRI_PLACES=471, PETRI_TRANSITIONS=681} [2024-06-14 12:44:23,047 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 427 predicate places. [2024-06-14 12:44:23,047 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 681 transitions, 9938 flow [2024-06-14 12:44:23,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:23,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:44:23,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:44:23,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-14 12:44:23,048 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:44:23,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:44:23,048 INFO L85 PathProgramCache]: Analyzing trace with hash 117322679, now seen corresponding path program 1 times [2024-06-14 12:44:23,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:44:23,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848796688] [2024-06-14 12:44:23,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:44:23,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:44:23,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:44:24,226 INFO 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 12:44:24,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:44:24,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848796688] [2024-06-14 12:44:24,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848796688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:44:24,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:44:24,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:44:24,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404999854] [2024-06-14 12:44:24,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:44:24,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:44:24,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:44:24,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:44:24,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:44:24,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:44:24,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 681 transitions, 9938 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:24,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:44:24,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:44:24,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:44:26,594 INFO L124 PetriNetUnfolderBase]: 4091/6234 cut-off events. [2024-06-14 12:44:26,594 INFO L125 PetriNetUnfolderBase]: For 2808957/2808961 co-relation queries the response was YES. [2024-06-14 12:44:26,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83789 conditions, 6234 events. 4091/6234 cut-off events. For 2808957/2808961 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 35070 event pairs, 728 based on Foata normal form. 5/6236 useless extension candidates. Maximal degree in co-relation 83566. Up to 6025 conditions per place. [2024-06-14 12:44:26,724 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 675 selfloop transitions, 25 changer transitions 0/704 dead transitions. [2024-06-14 12:44:26,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 704 transitions, 11550 flow [2024-06-14 12:44:26,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:44:26,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:44:26,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 149 transitions. [2024-06-14 12:44:26,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34651162790697676 [2024-06-14 12:44:26,725 INFO L175 Difference]: Start difference. First operand has 471 places, 681 transitions, 9938 flow. Second operand 10 states and 149 transitions. [2024-06-14 12:44:26,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 704 transitions, 11550 flow [2024-06-14 12:44:36,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 704 transitions, 11338 flow, removed 87 selfloop flow, removed 5 redundant places. [2024-06-14 12:44:36,661 INFO L231 Difference]: Finished difference. Result has 476 places, 684 transitions, 9938 flow [2024-06-14 12:44:36,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9728, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=656, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9938, PETRI_PLACES=476, PETRI_TRANSITIONS=684} [2024-06-14 12:44:36,661 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 432 predicate places. [2024-06-14 12:44:36,661 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 684 transitions, 9938 flow [2024-06-14 12:44:36,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:36,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:44:36,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:44:36,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-14 12:44:36,662 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:44:36,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:44:36,662 INFO L85 PathProgramCache]: Analyzing trace with hash 116934404, now seen corresponding path program 4 times [2024-06-14 12:44:36,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:44:36,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617502506] [2024-06-14 12:44:36,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:44:36,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:44:36,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:44:37,898 INFO 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 12:44:37,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:44:37,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617502506] [2024-06-14 12:44:37,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617502506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:44:37,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:44:37,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:44:37,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743045390] [2024-06-14 12:44:37,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:44:37,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:44:37,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:44:37,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:44:37,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:44:38,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:44:38,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 684 transitions, 9938 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:38,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:44:38,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:44:38,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:44:40,168 INFO L124 PetriNetUnfolderBase]: 4085/6219 cut-off events. [2024-06-14 12:44:40,169 INFO L125 PetriNetUnfolderBase]: For 2823030/2823038 co-relation queries the response was YES. [2024-06-14 12:44:40,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83569 conditions, 6219 events. 4085/6219 cut-off events. For 2823030/2823038 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 34982 event pairs, 712 based on Foata normal form. 6/6221 useless extension candidates. Maximal degree in co-relation 83344. Up to 5672 conditions per place. [2024-06-14 12:44:40,326 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 591 selfloop transitions, 110 changer transitions 0/705 dead transitions. [2024-06-14 12:44:40,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 705 transitions, 12052 flow [2024-06-14 12:44:40,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:44:40,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:44:40,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-14 12:44:40,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-14 12:44:40,328 INFO L175 Difference]: Start difference. First operand has 476 places, 684 transitions, 9938 flow. Second operand 10 states and 165 transitions. [2024-06-14 12:44:40,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 705 transitions, 12052 flow [2024-06-14 12:44:49,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 705 transitions, 11866 flow, removed 72 selfloop flow, removed 7 redundant places. [2024-06-14 12:44:49,988 INFO L231 Difference]: Finished difference. Result has 479 places, 684 transitions, 9979 flow [2024-06-14 12:44:49,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9752, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=684, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9979, PETRI_PLACES=479, PETRI_TRANSITIONS=684} [2024-06-14 12:44:49,989 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 435 predicate places. [2024-06-14 12:44:49,989 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 684 transitions, 9979 flow [2024-06-14 12:44:49,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:49,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:44:49,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:44:49,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-14 12:44:49,990 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:44:49,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:44:49,990 INFO L85 PathProgramCache]: Analyzing trace with hash -43380614, now seen corresponding path program 5 times [2024-06-14 12:44:49,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:44:49,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845807133] [2024-06-14 12:44:49,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:44:49,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:44:50,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:44:51,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:44:51,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:44:51,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845807133] [2024-06-14 12:44:51,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845807133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:44:51,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:44:51,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:44:51,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511774488] [2024-06-14 12:44:51,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:44:51,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:44:51,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:44:51,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:44:51,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:44:51,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:44:51,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 684 transitions, 9979 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:44:51,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:44:51,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:44:51,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:44:53,545 INFO L124 PetriNetUnfolderBase]: 4081/6217 cut-off events. [2024-06-14 12:44:53,545 INFO L125 PetriNetUnfolderBase]: For 2828961/2828969 co-relation queries the response was YES. [2024-06-14 12:44:53,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83568 conditions, 6217 events. 4081/6217 cut-off events. For 2828961/2828969 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 34920 event pairs, 712 based on Foata normal form. 6/6219 useless extension candidates. Maximal degree in co-relation 83342. Up to 5670 conditions per place. [2024-06-14 12:44:53,664 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 591 selfloop transitions, 110 changer transitions 0/705 dead transitions. [2024-06-14 12:44:53,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 705 transitions, 12097 flow [2024-06-14 12:44:53,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:44:53,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:44:53,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-14 12:44:53,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37906976744186044 [2024-06-14 12:44:53,665 INFO L175 Difference]: Start difference. First operand has 479 places, 684 transitions, 9979 flow. Second operand 10 states and 163 transitions. [2024-06-14 12:44:53,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 705 transitions, 12097 flow [2024-06-14 12:45:03,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 705 transitions, 11597 flow, removed 143 selfloop flow, removed 9 redundant places. [2024-06-14 12:45:03,504 INFO L231 Difference]: Finished difference. Result has 480 places, 684 transitions, 9707 flow [2024-06-14 12:45:03,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9479, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=684, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9707, PETRI_PLACES=480, PETRI_TRANSITIONS=684} [2024-06-14 12:45:03,504 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 436 predicate places. [2024-06-14 12:45:03,504 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 684 transitions, 9707 flow [2024-06-14 12:45:03,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:45:03,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:45:03,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:45:03,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-14 12:45:03,505 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:45:03,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:45:03,505 INFO L85 PathProgramCache]: Analyzing trace with hash -292412641, now seen corresponding path program 2 times [2024-06-14 12:45:03,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:45:03,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764258440] [2024-06-14 12:45:03,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:45:03,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:45:03,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:45:04,512 INFO 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 12:45:04,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:45:04,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764258440] [2024-06-14 12:45:04,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764258440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:45:04,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:45:04,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:45:04,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484226163] [2024-06-14 12:45:04,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:45:04,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:45:04,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:45:04,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:45:04,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:45:04,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:45:04,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 684 transitions, 9707 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:45:04,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:45:04,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:45:04,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:45:07,007 INFO L124 PetriNetUnfolderBase]: 3954/6064 cut-off events. [2024-06-14 12:45:07,008 INFO L125 PetriNetUnfolderBase]: For 2852898/2852909 co-relation queries the response was YES. [2024-06-14 12:45:07,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82770 conditions, 6064 events. 3954/6064 cut-off events. For 2852898/2852909 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 34564 event pairs, 710 based on Foata normal form. 1/6027 useless extension candidates. Maximal degree in co-relation 82544. Up to 5214 conditions per place. [2024-06-14 12:45:07,135 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 559 selfloop transitions, 100 changer transitions 0/710 dead transitions. [2024-06-14 12:45:07,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 710 transitions, 11210 flow [2024-06-14 12:45:07,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:45:07,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:45:07,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 12:45:07,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-14 12:45:07,137 INFO L175 Difference]: Start difference. First operand has 480 places, 684 transitions, 9707 flow. Second operand 8 states and 148 transitions. [2024-06-14 12:45:07,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 710 transitions, 11210 flow [2024-06-14 12:45:16,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 710 transitions, 10981 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-14 12:45:16,523 INFO L231 Difference]: Finished difference. Result has 480 places, 687 transitions, 9791 flow [2024-06-14 12:45:16,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9478, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=684, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9791, PETRI_PLACES=480, PETRI_TRANSITIONS=687} [2024-06-14 12:45:16,524 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 436 predicate places. [2024-06-14 12:45:16,524 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 687 transitions, 9791 flow [2024-06-14 12:45:16,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:45:16,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:45:16,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:45:16,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-14 12:45:16,525 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:45:16,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:45:16,525 INFO L85 PathProgramCache]: Analyzing trace with hash 684587559, now seen corresponding path program 3 times [2024-06-14 12:45:16,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:45:16,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829499499] [2024-06-14 12:45:16,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:45:16,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:45:16,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:45:17,617 INFO 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 12:45:17,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:45:17,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829499499] [2024-06-14 12:45:17,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829499499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:45:17,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:45:17,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:45:17,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459586789] [2024-06-14 12:45:17,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:45:17,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:45:17,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:45:17,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:45:17,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:45:17,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:45:17,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 687 transitions, 9791 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:45:17,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:45:17,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:45:17,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:45:19,998 INFO L124 PetriNetUnfolderBase]: 3951/6058 cut-off events. [2024-06-14 12:45:19,999 INFO L125 PetriNetUnfolderBase]: For 2872369/2872380 co-relation queries the response was YES. [2024-06-14 12:45:20,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82775 conditions, 6058 events. 3951/6058 cut-off events. For 2872369/2872380 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 34482 event pairs, 702 based on Foata normal form. 1/6021 useless extension candidates. Maximal degree in co-relation 82548. Up to 5210 conditions per place. [2024-06-14 12:45:20,123 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 558 selfloop transitions, 102 changer transitions 0/711 dead transitions. [2024-06-14 12:45:20,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 711 transitions, 11205 flow [2024-06-14 12:45:20,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:45:20,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:45:20,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 12:45:20,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-14 12:45:20,124 INFO L175 Difference]: Start difference. First operand has 480 places, 687 transitions, 9791 flow. Second operand 8 states and 147 transitions. [2024-06-14 12:45:20,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 711 transitions, 11205 flow [2024-06-14 12:45:28,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 711 transitions, 10897 flow, removed 59 selfloop flow, removed 6 redundant places. [2024-06-14 12:45:28,680 INFO L231 Difference]: Finished difference. Result has 482 places, 687 transitions, 9699 flow [2024-06-14 12:45:28,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9483, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=687, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9699, PETRI_PLACES=482, PETRI_TRANSITIONS=687} [2024-06-14 12:45:28,680 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 438 predicate places. [2024-06-14 12:45:28,680 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 687 transitions, 9699 flow [2024-06-14 12:45:28,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:45:28,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:45:28,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:45:28,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-14 12:45:28,681 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:45:28,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:45:28,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1123462053, now seen corresponding path program 4 times [2024-06-14 12:45:28,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:45:28,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418768664] [2024-06-14 12:45:28,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:45:28,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:45:28,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:45:29,841 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 12:45:29,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:45:29,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418768664] [2024-06-14 12:45:29,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418768664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:45:29,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:45:29,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:45:29,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798350606] [2024-06-14 12:45:29,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:45:29,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:45:29,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:45:29,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:45:29,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:45:29,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:45:29,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 687 transitions, 9699 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:45:29,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:45:29,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:45:29,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:45:31,974 INFO L124 PetriNetUnfolderBase]: 3958/6060 cut-off events. [2024-06-14 12:45:31,974 INFO L125 PetriNetUnfolderBase]: For 2921697/2921714 co-relation queries the response was YES. [2024-06-14 12:45:32,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83199 conditions, 6060 events. 3958/6060 cut-off events. For 2921697/2921714 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 34475 event pairs, 685 based on Foata normal form. 1/6009 useless extension candidates. Maximal degree in co-relation 82971. Up to 5153 conditions per place. [2024-06-14 12:45:32,092 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 532 selfloop transitions, 126 changer transitions 0/709 dead transitions. [2024-06-14 12:45:32,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 709 transitions, 11107 flow [2024-06-14 12:45:32,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:45:32,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:45:32,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 12:45:32,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-14 12:45:32,094 INFO L175 Difference]: Start difference. First operand has 482 places, 687 transitions, 9699 flow. Second operand 8 states and 146 transitions. [2024-06-14 12:45:32,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 709 transitions, 11107 flow [2024-06-14 12:45:41,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 709 transitions, 10812 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-14 12:45:41,341 INFO L231 Difference]: Finished difference. Result has 483 places, 687 transitions, 9666 flow [2024-06-14 12:45:41,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9404, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=687, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9666, PETRI_PLACES=483, PETRI_TRANSITIONS=687} [2024-06-14 12:45:41,342 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 439 predicate places. [2024-06-14 12:45:41,342 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 687 transitions, 9666 flow [2024-06-14 12:45:41,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:45:41,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:45:41,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:45:41,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-14 12:45:41,343 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:45:41,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:45:41,343 INFO L85 PathProgramCache]: Analyzing trace with hash -564517828, now seen corresponding path program 7 times [2024-06-14 12:45:41,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:45:41,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201302899] [2024-06-14 12:45:41,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:45:41,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:45:41,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:45:42,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:45:42,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:45:42,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201302899] [2024-06-14 12:45:42,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201302899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:45:42,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:45:42,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:45:42,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649220281] [2024-06-14 12:45:42,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:45:42,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:45:42,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:45:42,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:45:42,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:45:42,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:45:42,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 687 transitions, 9666 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:45:42,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:45:42,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:45:42,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:45:44,288 INFO L124 PetriNetUnfolderBase]: 3950/6083 cut-off events. [2024-06-14 12:45:44,288 INFO L125 PetriNetUnfolderBase]: For 2896844/2896861 co-relation queries the response was YES. [2024-06-14 12:45:44,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82607 conditions, 6083 events. 3950/6083 cut-off events. For 2896844/2896861 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 34792 event pairs, 740 based on Foata normal form. 6/6061 useless extension candidates. Maximal degree in co-relation 82378. Up to 5214 conditions per place. [2024-06-14 12:45:44,415 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 571 selfloop transitions, 95 changer transitions 0/717 dead transitions. [2024-06-14 12:45:44,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 717 transitions, 11251 flow [2024-06-14 12:45:44,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:45:44,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:45:44,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 12:45:44,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-14 12:45:44,416 INFO L175 Difference]: Start difference. First operand has 483 places, 687 transitions, 9666 flow. Second operand 8 states and 142 transitions. [2024-06-14 12:45:44,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 717 transitions, 11251 flow [2024-06-14 12:45:53,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 717 transitions, 10899 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-14 12:45:53,907 INFO L231 Difference]: Finished difference. Result has 483 places, 695 transitions, 9698 flow [2024-06-14 12:45:53,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9322, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=687, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=596, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9698, PETRI_PLACES=483, PETRI_TRANSITIONS=695} [2024-06-14 12:45:53,908 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 439 predicate places. [2024-06-14 12:45:53,908 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 695 transitions, 9698 flow [2024-06-14 12:45:53,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:45:53,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:45:53,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:45:53,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-14 12:45:53,908 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:45:53,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:45:53,909 INFO L85 PathProgramCache]: Analyzing trace with hash 549414434, now seen corresponding path program 8 times [2024-06-14 12:45:53,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:45:53,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825624988] [2024-06-14 12:45:53,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:45:53,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:45:53,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:45:54,812 INFO 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 12:45:54,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:45:54,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825624988] [2024-06-14 12:45:54,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825624988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:45:54,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:45:54,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:45:54,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110869410] [2024-06-14 12:45:54,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:45:54,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:45:54,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:45:54,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:45:54,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:45:54,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:45:54,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 695 transitions, 9698 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:45:54,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:45:54,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:45:54,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:45:57,052 INFO L124 PetriNetUnfolderBase]: 3952/6073 cut-off events. [2024-06-14 12:45:57,052 INFO L125 PetriNetUnfolderBase]: For 2916844/2916861 co-relation queries the response was YES. [2024-06-14 12:45:57,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82822 conditions, 6073 events. 3952/6073 cut-off events. For 2916844/2916861 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 34624 event pairs, 745 based on Foata normal form. 6/6050 useless extension candidates. Maximal degree in co-relation 82592. Up to 5201 conditions per place. [2024-06-14 12:45:57,185 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 567 selfloop transitions, 100 changer transitions 0/718 dead transitions. [2024-06-14 12:45:57,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 718 transitions, 11201 flow [2024-06-14 12:45:57,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:45:57,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:45:57,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 12:45:57,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-14 12:45:57,187 INFO L175 Difference]: Start difference. First operand has 483 places, 695 transitions, 9698 flow. Second operand 8 states and 142 transitions. [2024-06-14 12:45:57,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 718 transitions, 11201 flow [2024-06-14 12:46:07,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 718 transitions, 11016 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-14 12:46:07,249 INFO L231 Difference]: Finished difference. Result has 487 places, 698 transitions, 9812 flow [2024-06-14 12:46:07,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9513, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9812, PETRI_PLACES=487, PETRI_TRANSITIONS=698} [2024-06-14 12:46:07,250 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 443 predicate places. [2024-06-14 12:46:07,250 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 698 transitions, 9812 flow [2024-06-14 12:46:07,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:07,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:07,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:46:07,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-14 12:46:07,251 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:46:07,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:07,252 INFO L85 PathProgramCache]: Analyzing trace with hash 549414806, now seen corresponding path program 7 times [2024-06-14 12:46:07,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:07,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941085011] [2024-06-14 12:46:07,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:07,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:07,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:08,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:08,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:08,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941085011] [2024-06-14 12:46:08,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941085011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:08,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:08,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:46:08,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093216185] [2024-06-14 12:46:08,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:08,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:46:08,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:08,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:46:08,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:46:08,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:46:08,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 698 transitions, 9812 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:08,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:08,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:46:08,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:10,404 INFO L124 PetriNetUnfolderBase]: 4094/6215 cut-off events. [2024-06-14 12:46:10,404 INFO L125 PetriNetUnfolderBase]: For 2946431/2946436 co-relation queries the response was YES. [2024-06-14 12:46:10,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83950 conditions, 6215 events. 4094/6215 cut-off events. For 2946431/2946436 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 34816 event pairs, 750 based on Foata normal form. 2/6194 useless extension candidates. Maximal degree in co-relation 83718. Up to 5609 conditions per place. [2024-06-14 12:46:10,525 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 613 selfloop transitions, 109 changer transitions 0/726 dead transitions. [2024-06-14 12:46:10,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 726 transitions, 11470 flow [2024-06-14 12:46:10,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:46:10,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:46:10,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-14 12:46:10,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39276485788113696 [2024-06-14 12:46:10,526 INFO L175 Difference]: Start difference. First operand has 487 places, 698 transitions, 9812 flow. Second operand 9 states and 152 transitions. [2024-06-14 12:46:10,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 726 transitions, 11470 flow [2024-06-14 12:46:21,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 726 transitions, 11210 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-14 12:46:21,122 INFO L231 Difference]: Finished difference. Result has 490 places, 701 transitions, 9896 flow [2024-06-14 12:46:21,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9552, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=589, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9896, PETRI_PLACES=490, PETRI_TRANSITIONS=701} [2024-06-14 12:46:21,122 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 446 predicate places. [2024-06-14 12:46:21,123 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 701 transitions, 9896 flow [2024-06-14 12:46:21,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:21,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:46:21,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:46:21,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-14 12:46:21,123 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:46:21,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:46:21,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1615132340, now seen corresponding path program 8 times [2024-06-14 12:46:21,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:46:21,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570429250] [2024-06-14 12:46:21,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:46:21,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:46:21,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:46:22,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:46:22,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:46:22,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570429250] [2024-06-14 12:46:22,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570429250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:46:22,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:46:22,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:46:22,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868330247] [2024-06-14 12:46:22,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:46:22,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:46:22,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:46:22,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:46:22,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:46:22,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:46:22,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 701 transitions, 9896 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:46:22,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:46:22,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:46:22,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:46:24,481 INFO L124 PetriNetUnfolderBase]: 4104/6231 cut-off events. [2024-06-14 12:46:24,482 INFO L125 PetriNetUnfolderBase]: For 2982424/2982429 co-relation queries the response was YES. [2024-06-14 12:46:24,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84472 conditions, 6231 events. 4104/6231 cut-off events. For 2982424/2982429 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 34925 event pairs, 755 based on Foata normal form. 2/6209 useless extension candidates. Maximal degree in co-relation 84239. Up to 5623 conditions per place. [2024-06-14 12:46:24,601 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 619 selfloop transitions, 105 changer transitions 0/728 dead transitions. [2024-06-14 12:46:24,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 728 transitions, 11560 flow [2024-06-14 12:46:24,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:46:24,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:46:24,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-14 12:46:24,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 12:46:24,602 INFO L175 Difference]: Start difference. First operand has 490 places, 701 transitions, 9896 flow. Second operand 9 states and 153 transitions. [2024-06-14 12:46:24,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 728 transitions, 11560 flow Killed by 15