./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix028_power.oepc_pso.oepc_rmo.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/mix028_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f 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/mix028_power.oepc_pso.oepc_rmo.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/mix028_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 16:38:20,258 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 16:38:20,324 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 16:38:20,328 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 16:38:20,329 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 16:38:20,352 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 16:38:20,353 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 16:38:20,353 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 16:38:20,354 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 16:38:20,357 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 16:38:20,357 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 16:38:20,357 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 16:38:20,358 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 16:38:20,359 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 16:38:20,359 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 16:38:20,359 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 16:38:20,360 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 16:38:20,360 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 16:38:20,360 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 16:38:20,360 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 16:38:20,361 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 16:38:20,361 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 16:38:20,361 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 16:38:20,361 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 16:38:20,362 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 16:38:20,362 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 16:38:20,362 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 16:38:20,362 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 16:38:20,363 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 16:38:20,363 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 16:38:20,364 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 16:38:20,364 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 16:38:20,364 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:38:20,365 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 16:38:20,365 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 16:38:20,365 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 16:38:20,365 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 16:38:20,365 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 16:38:20,365 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 16:38:20,366 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 16:38:20,366 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 16:38:20,366 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 16:38:20,366 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 16:38:20,367 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 16:38:20,549 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 16:38:20,568 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 16:38:20,570 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 16:38:20,570 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 16:38:20,571 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 16:38:20,572 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix028_power.oepc_pso.oepc_rmo.oepc.i [2024-06-21 16:38:21,725 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 16:38:22,035 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 16:38:22,036 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix028_power.oepc_pso.oepc_rmo.oepc.i [2024-06-21 16:38:22,055 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5eafd8cbc/bb557b32bee747aa9f58b54d933580ff/FLAG22d6e0180 [2024-06-21 16:38:22,065 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5eafd8cbc/bb557b32bee747aa9f58b54d933580ff [2024-06-21 16:38:22,067 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 16:38:22,068 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 16:38:22,069 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix028_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-21 16:38:22,224 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 16:38:22,225 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 16:38:22,226 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 16:38:22,226 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 16:38:22,230 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 16:38:22,230 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:38:22" (1/2) ... [2024-06-21 16:38:22,231 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cc34242 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:38:22, skipping insertion in model container [2024-06-21 16:38:22,231 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:38:22" (1/2) ... [2024-06-21 16:38:22,233 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6dc54029 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:38:22, skipping insertion in model container [2024-06-21 16:38:22,233 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:38:22" (2/2) ... [2024-06-21 16:38:22,234 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cc34242 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:38:22, skipping insertion in model container [2024-06-21 16:38:22,234 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:38:22" (2/2) ... [2024-06-21 16:38:22,235 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 16:38:22,298 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 16:38:22,299 INFO L97 edCorrectnessWitness]: Location invariant before [L841-L841] (((((((((((((((((! multithreaded || z$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1)) [2024-06-21 16:38:22,299 INFO L97 edCorrectnessWitness]: Location invariant before [L839-L839] (((((((((((((((((! multithreaded || z$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1)) [2024-06-21 16:38:22,299 INFO L97 edCorrectnessWitness]: Location invariant before [L842-L842] (((((((((((((((((! multithreaded || z$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1)) [2024-06-21 16:38:22,299 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 16:38:22,300 INFO L106 edCorrectnessWitness]: ghost_update [L837-L837] multithreaded = 1; [2024-06-21 16:38:22,334 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 16:38:22,574 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:38:22,582 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 16:38:22,716 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:38:22,754 INFO L206 MainTranslator]: Completed translation [2024-06-21 16:38:22,755 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:38:22 WrapperNode [2024-06-21 16:38:22,755 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 16:38:22,756 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 16:38:22,756 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 16:38:22,756 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 16:38:22,761 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 21.06 04:38:22" (1/1) ... [2024-06-21 16:38:22,787 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 21.06 04:38:22" (1/1) ... [2024-06-21 16:38:22,819 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 125 [2024-06-21 16:38:22,820 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 16:38:22,821 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 16:38:22,821 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 16:38:22,821 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 16:38:22,830 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:38:22" (1/1) ... [2024-06-21 16:38:22,830 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:38:22" (1/1) ... [2024-06-21 16:38:22,844 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:38:22" (1/1) ... [2024-06-21 16:38:22,861 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]. [2024-06-21 16:38:22,864 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:38:22" (1/1) ... [2024-06-21 16:38:22,864 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:38:22" (1/1) ... [2024-06-21 16:38:22,877 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:38:22" (1/1) ... [2024-06-21 16:38:22,886 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:38:22" (1/1) ... [2024-06-21 16:38:22,887 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:38:22" (1/1) ... [2024-06-21 16:38:22,894 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:38:22" (1/1) ... [2024-06-21 16:38:22,896 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 16:38:22,899 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 16:38:22,900 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 16:38:22,900 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 16:38:22,901 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:38:22" (1/1) ... [2024-06-21 16:38:22,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:38:22,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 16:38:22,924 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) [2024-06-21 16:38:22,926 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 [2024-06-21 16:38:22,950 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 16:38:22,950 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 16:38:22,950 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 16:38:22,950 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 16:38:22,950 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 16:38:22,950 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 16:38:22,951 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 16:38:22,951 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 16:38:22,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 16:38:22,951 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 16:38:22,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 16:38:22,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 16:38:22,952 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 16:38:23,042 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 16:38:23,044 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 16:38:23,285 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 16:38:23,285 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 16:38:23,456 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 16:38:23,456 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 16:38:23,457 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:38:23 BoogieIcfgContainer [2024-06-21 16:38:23,457 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 16:38:23,459 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 16:38:23,459 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 16:38:23,462 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 16:38:23,462 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 04:38:22" (1/4) ... [2024-06-21 16:38:23,463 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52bdacf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 04:38:23, skipping insertion in model container [2024-06-21 16:38:23,463 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:38:22" (2/4) ... [2024-06-21 16:38:23,464 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52bdacf6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 04:38:23, skipping insertion in model container [2024-06-21 16:38:23,464 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:38:22" (3/4) ... [2024-06-21 16:38:23,464 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52bdacf6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 04:38:23, skipping insertion in model container [2024-06-21 16:38:23,464 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:38:23" (4/4) ... [2024-06-21 16:38:23,465 INFO L112 eAbstractionObserver]: Analyzing ICFG mix028_power.oepc_pso.oepc_rmo.oepc.i [2024-06-21 16:38:23,478 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 16:38:23,479 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 16:38:23,479 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 16:38:23,520 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 16:38:23,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-21 16:38:23,577 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-21 16:38:23,578 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:38:23,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 60 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 16:38:23,579 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-21 16:38:23,583 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-21 16:38:23,594 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 16:38:23,600 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;@1408780d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 16:38:23,601 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 16:38:23,605 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 16:38:23,605 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 16:38:23,606 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:38:23,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:38:23,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 16:38:23,607 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)] === [2024-06-21 16:38:23,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:38:23,646 INFO L85 PathProgramCache]: Analyzing trace with hash 368241174, now seen corresponding path program 1 times [2024-06-21 16:38:23,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:38:23,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270424094] [2024-06-21 16:38:23,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:38:23,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:38:23,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:38:24,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:38:24,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:38:24,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270424094] [2024-06-21 16:38:24,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270424094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:38:24,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:38:24,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 16:38:24,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073199875] [2024-06-21 16:38:24,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:38:24,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 16:38:24,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:38:24,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 16:38:24,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 16:38:24,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 16:38:24,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:24,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:38:24,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 16:38:24,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:38:24,909 INFO L124 PetriNetUnfolderBase]: 1659/2537 cut-off events. [2024-06-21 16:38:24,909 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2024-06-21 16:38:24,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5101 conditions, 2537 events. 1659/2537 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 12032 event pairs, 1184 based on Foata normal form. 1/2485 useless extension candidates. Maximal degree in co-relation 5089. Up to 2465 conditions per place. [2024-06-21 16:38:24,927 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 33 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-21 16:38:24,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 173 flow [2024-06-21 16:38:24,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 16:38:24,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 16:38:24,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2024-06-21 16:38:24,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-21 16:38:24,938 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 73 transitions. [2024-06-21 16:38:24,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 173 flow [2024-06-21 16:38:24,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 168 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 16:38:24,944 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-21 16:38:24,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-21 16:38:24,948 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-21 16:38:24,948 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-21 16:38:24,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:24,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:38:24,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:38:24,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 16:38:24,949 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)] === [2024-06-21 16:38:24,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:38:24,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1692467381, now seen corresponding path program 1 times [2024-06-21 16:38:24,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:38:24,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779059820] [2024-06-21 16:38:24,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:38:24,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:38:24,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:38:25,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:38:25,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:38:25,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779059820] [2024-06-21 16:38:25,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779059820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:38:25,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:38:25,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 16:38:25,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773237143] [2024-06-21 16:38:25,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:38:25,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 16:38:25,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:38:25,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 16:38:25,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 16:38:25,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 16:38:25,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:25,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:38:25,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 16:38:25,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:38:25,776 INFO L124 PetriNetUnfolderBase]: 1653/2528 cut-off events. [2024-06-21 16:38:25,776 INFO L125 PetriNetUnfolderBase]: For 458/458 co-relation queries the response was YES. [2024-06-21 16:38:25,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5717 conditions, 2528 events. 1653/2528 cut-off events. For 458/458 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 12035 event pairs, 1038 based on Foata normal form. 3/2518 useless extension candidates. Maximal degree in co-relation 5705. Up to 2441 conditions per place. [2024-06-21 16:38:25,786 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 40 selfloop transitions, 7 changer transitions 0/52 dead transitions. [2024-06-21 16:38:25,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 52 transitions, 240 flow [2024-06-21 16:38:25,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 16:38:25,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 16:38:25,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-06-21 16:38:25,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-21 16:38:25,788 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 94 transitions. [2024-06-21 16:38:25,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 52 transitions, 240 flow [2024-06-21 16:38:25,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 236 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 16:38:25,790 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 136 flow [2024-06-21 16:38:25,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-21 16:38:25,791 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-06-21 16:38:25,791 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 136 flow [2024-06-21 16:38:25,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:25,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:38:25,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:38:25,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 16:38:25,792 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)] === [2024-06-21 16:38:25,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:38:25,792 INFO L85 PathProgramCache]: Analyzing trace with hash 926881865, now seen corresponding path program 1 times [2024-06-21 16:38:25,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:38:25,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760390438] [2024-06-21 16:38:25,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:38:25,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:38:25,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:38:26,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:38:26,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:38:26,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760390438] [2024-06-21 16:38:26,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760390438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:38:26,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:38:26,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 16:38:26,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488800206] [2024-06-21 16:38:26,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:38:26,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 16:38:26,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:38:26,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 16:38:26,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 16:38:26,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 16:38:26,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:26,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:38:26,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 16:38:26,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:38:26,610 INFO L124 PetriNetUnfolderBase]: 1661/2558 cut-off events. [2024-06-21 16:38:26,610 INFO L125 PetriNetUnfolderBase]: For 1306/1306 co-relation queries the response was YES. [2024-06-21 16:38:26,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6384 conditions, 2558 events. 1661/2558 cut-off events. For 1306/1306 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 12206 event pairs, 812 based on Foata normal form. 5/2562 useless extension candidates. Maximal degree in co-relation 6370. Up to 2387 conditions per place. [2024-06-21 16:38:26,622 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 53 selfloop transitions, 16 changer transitions 0/74 dead transitions. [2024-06-21 16:38:26,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 74 transitions, 394 flow [2024-06-21 16:38:26,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:38:26,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:38:26,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-21 16:38:26,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 16:38:26,624 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 136 flow. Second operand 5 states and 123 transitions. [2024-06-21 16:38:26,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 74 transitions, 394 flow [2024-06-21 16:38:26,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 74 transitions, 380 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 16:38:26,627 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 235 flow [2024-06-21 16:38:26,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=235, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2024-06-21 16:38:26,627 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2024-06-21 16:38:26,628 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 235 flow [2024-06-21 16:38:26,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:26,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:38:26,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:38:26,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 16:38:26,628 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)] === [2024-06-21 16:38:26,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:38:26,629 INFO L85 PathProgramCache]: Analyzing trace with hash -721908760, now seen corresponding path program 1 times [2024-06-21 16:38:26,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:38:26,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191186733] [2024-06-21 16:38:26,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:38:26,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:38:26,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:38:27,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:38:27,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:38:27,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191186733] [2024-06-21 16:38:27,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191186733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:38:27,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:38:27,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:38:27,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744892878] [2024-06-21 16:38:27,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:38:27,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:38:27,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:38:27,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:38:27,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:38:27,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 16:38:27,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 235 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) [2024-06-21 16:38:27,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:38:27,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 16:38:27,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:38:27,716 INFO L124 PetriNetUnfolderBase]: 1669/2570 cut-off events. [2024-06-21 16:38:27,717 INFO L125 PetriNetUnfolderBase]: For 3038/3040 co-relation queries the response was YES. [2024-06-21 16:38:27,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7503 conditions, 2570 events. 1669/2570 cut-off events. For 3038/3040 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 12288 event pairs, 666 based on Foata normal form. 7/2576 useless extension candidates. Maximal degree in co-relation 7486. Up to 2373 conditions per place. [2024-06-21 16:38:27,730 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 60 selfloop transitions, 20 changer transitions 0/85 dead transitions. [2024-06-21 16:38:27,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 85 transitions, 521 flow [2024-06-21 16:38:27,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:38:27,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:38:27,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-21 16:38:27,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5894308943089431 [2024-06-21 16:38:27,732 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 235 flow. Second operand 6 states and 145 transitions. [2024-06-21 16:38:27,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 85 transitions, 521 flow [2024-06-21 16:38:27,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 85 transitions, 513 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-21 16:38:27,736 INFO L231 Difference]: Finished difference. Result has 56 places, 53 transitions, 308 flow [2024-06-21 16:38:27,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=308, PETRI_PLACES=56, PETRI_TRANSITIONS=53} [2024-06-21 16:38:27,737 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 14 predicate places. [2024-06-21 16:38:27,737 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 53 transitions, 308 flow [2024-06-21 16:38:27,737 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) [2024-06-21 16:38:27,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:38:27,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:38:27,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 16:38:27,738 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:38:27,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:38:27,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1675262408, now seen corresponding path program 1 times [2024-06-21 16:38:27,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:38:27,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706710453] [2024-06-21 16:38:27,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:38:27,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:38:27,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:38:28,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:38:28,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:38:28,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706710453] [2024-06-21 16:38:28,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706710453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:38:28,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:38:28,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:38:28,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378351301] [2024-06-21 16:38:28,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:38:28,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:38:28,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:38:28,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:38:28,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:38:28,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 16:38:28,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 53 transitions, 308 flow. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 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) [2024-06-21 16:38:28,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:38:28,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 16:38:28,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:38:29,117 INFO L124 PetriNetUnfolderBase]: 1681/2590 cut-off events. [2024-06-21 16:38:29,118 INFO L125 PetriNetUnfolderBase]: For 4787/4789 co-relation queries the response was YES. [2024-06-21 16:38:29,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8374 conditions, 2590 events. 1681/2590 cut-off events. For 4787/4789 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 12415 event pairs, 502 based on Foata normal form. 12/2601 useless extension candidates. Maximal degree in co-relation 8354. Up to 2341 conditions per place. [2024-06-21 16:38:29,130 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 64 selfloop transitions, 23 changer transitions 0/92 dead transitions. [2024-06-21 16:38:29,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 92 transitions, 622 flow [2024-06-21 16:38:29,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:38:29,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:38:29,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-21 16:38:29,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-21 16:38:29,131 INFO L175 Difference]: Start difference. First operand has 56 places, 53 transitions, 308 flow. Second operand 7 states and 163 transitions. [2024-06-21 16:38:29,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 92 transitions, 622 flow [2024-06-21 16:38:29,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 92 transitions, 573 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 16:38:29,136 INFO L231 Difference]: Finished difference. Result has 58 places, 55 transitions, 335 flow [2024-06-21 16:38:29,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=335, PETRI_PLACES=58, PETRI_TRANSITIONS=55} [2024-06-21 16:38:29,136 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-21 16:38:29,136 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 55 transitions, 335 flow [2024-06-21 16:38:29,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 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) [2024-06-21 16:38:29,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:38:29,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:38:29,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 16:38:29,137 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)] === [2024-06-21 16:38:29,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:38:29,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1549786196, now seen corresponding path program 1 times [2024-06-21 16:38:29,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:38:29,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550487964] [2024-06-21 16:38:29,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:38:29,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:38:29,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:38:29,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:38:29,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:38:29,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550487964] [2024-06-21 16:38:29,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550487964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:38:29,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:38:29,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:38:29,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098096757] [2024-06-21 16:38:29,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:38:29,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:38:29,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:38:29,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:38:29,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:38:29,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 16:38:29,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 55 transitions, 335 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:29,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:38:29,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 16:38:29,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:38:29,904 INFO L124 PetriNetUnfolderBase]: 1676/2579 cut-off events. [2024-06-21 16:38:29,904 INFO L125 PetriNetUnfolderBase]: For 6458/6458 co-relation queries the response was YES. [2024-06-21 16:38:29,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8897 conditions, 2579 events. 1676/2579 cut-off events. For 6458/6458 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 12271 event pairs, 659 based on Foata normal form. 2/2580 useless extension candidates. Maximal degree in co-relation 8875. Up to 2484 conditions per place. [2024-06-21 16:38:29,919 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 54 selfloop transitions, 8 changer transitions 0/66 dead transitions. [2024-06-21 16:38:29,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 66 transitions, 487 flow [2024-06-21 16:38:29,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:38:29,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:38:29,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-06-21 16:38:29,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44390243902439025 [2024-06-21 16:38:29,920 INFO L175 Difference]: Start difference. First operand has 58 places, 55 transitions, 335 flow. Second operand 5 states and 91 transitions. [2024-06-21 16:38:29,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 66 transitions, 487 flow [2024-06-21 16:38:29,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 66 transitions, 423 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 16:38:29,927 INFO L231 Difference]: Finished difference. Result has 58 places, 55 transitions, 295 flow [2024-06-21 16:38:29,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=295, PETRI_PLACES=58, PETRI_TRANSITIONS=55} [2024-06-21 16:38:29,929 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-21 16:38:29,929 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 55 transitions, 295 flow [2024-06-21 16:38:29,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:29,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:38:29,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:38:29,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 16:38:29,930 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)] === [2024-06-21 16:38:29,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:38:29,931 INFO L85 PathProgramCache]: Analyzing trace with hash 798329682, now seen corresponding path program 1 times [2024-06-21 16:38:29,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:38:29,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35789185] [2024-06-21 16:38:29,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:38:29,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:38:29,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:38:30,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:38:30,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:38:30,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35789185] [2024-06-21 16:38:30,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35789185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:38:30,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:38:30,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:38:30,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651218454] [2024-06-21 16:38:30,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:38:30,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:38:30,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:38:30,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:38:30,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:38:30,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:38:30,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 55 transitions, 295 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:30,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:38:30,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:38:30,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:38:30,925 INFO L124 PetriNetUnfolderBase]: 1932/2871 cut-off events. [2024-06-21 16:38:30,925 INFO L125 PetriNetUnfolderBase]: For 8815/8815 co-relation queries the response was YES. [2024-06-21 16:38:30,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10013 conditions, 2871 events. 1932/2871 cut-off events. For 8815/8815 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13034 event pairs, 727 based on Foata normal form. 6/2876 useless extension candidates. Maximal degree in co-relation 9989. Up to 2802 conditions per place. [2024-06-21 16:38:30,939 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 65 selfloop transitions, 17 changer transitions 0/85 dead transitions. [2024-06-21 16:38:30,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 85 transitions, 589 flow [2024-06-21 16:38:30,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:38:30,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:38:30,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-21 16:38:30,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-21 16:38:30,940 INFO L175 Difference]: Start difference. First operand has 58 places, 55 transitions, 295 flow. Second operand 6 states and 110 transitions. [2024-06-21 16:38:30,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 85 transitions, 589 flow [2024-06-21 16:38:30,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 85 transitions, 567 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 16:38:30,946 INFO L231 Difference]: Finished difference. Result has 62 places, 66 transitions, 404 flow [2024-06-21 16:38:30,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=404, PETRI_PLACES=62, PETRI_TRANSITIONS=66} [2024-06-21 16:38:30,947 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 20 predicate places. [2024-06-21 16:38:30,947 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 66 transitions, 404 flow [2024-06-21 16:38:30,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:30,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:38:30,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:38:30,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 16:38:30,947 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)] === [2024-06-21 16:38:30,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:38:30,948 INFO L85 PathProgramCache]: Analyzing trace with hash -2006007427, now seen corresponding path program 1 times [2024-06-21 16:38:30,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:38:30,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607611103] [2024-06-21 16:38:30,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:38:30,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:38:30,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:38:31,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:38:31,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:38:31,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607611103] [2024-06-21 16:38:31,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607611103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:38:31,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:38:31,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:38:31,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204895936] [2024-06-21 16:38:31,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:38:31,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:38:31,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:38:31,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:38:31,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:38:31,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 16:38:31,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 66 transitions, 404 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 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) [2024-06-21 16:38:31,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:38:31,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 16:38:31,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:38:31,888 INFO L124 PetriNetUnfolderBase]: 1744/2686 cut-off events. [2024-06-21 16:38:31,888 INFO L125 PetriNetUnfolderBase]: For 10832/10846 co-relation queries the response was YES. [2024-06-21 16:38:31,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10190 conditions, 2686 events. 1744/2686 cut-off events. For 10832/10846 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 12861 event pairs, 651 based on Foata normal form. 8/2678 useless extension candidates. Maximal degree in co-relation 10164. Up to 2489 conditions per place. [2024-06-21 16:38:31,899 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 63 selfloop transitions, 19 changer transitions 0/89 dead transitions. [2024-06-21 16:38:31,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 89 transitions, 668 flow [2024-06-21 16:38:31,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:38:31,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:38:31,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-21 16:38:31,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-21 16:38:31,900 INFO L175 Difference]: Start difference. First operand has 62 places, 66 transitions, 404 flow. Second operand 6 states and 116 transitions. [2024-06-21 16:38:31,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 89 transitions, 668 flow [2024-06-21 16:38:31,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 89 transitions, 650 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-21 16:38:31,907 INFO L231 Difference]: Finished difference. Result has 67 places, 69 transitions, 458 flow [2024-06-21 16:38:31,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=458, PETRI_PLACES=67, PETRI_TRANSITIONS=69} [2024-06-21 16:38:31,908 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 25 predicate places. [2024-06-21 16:38:31,908 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 69 transitions, 458 flow [2024-06-21 16:38:31,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 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) [2024-06-21 16:38:31,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:38:31,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:38:31,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 16:38:31,909 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)] === [2024-06-21 16:38:31,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:38:31,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1009077837, now seen corresponding path program 2 times [2024-06-21 16:38:31,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:38:31,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286779814] [2024-06-21 16:38:31,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:38:31,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:38:31,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:38:32,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:38:32,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:38:32,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286779814] [2024-06-21 16:38:32,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286779814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:38:32,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:38:32,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:38:32,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114754838] [2024-06-21 16:38:32,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:38:32,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:38:32,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:38:32,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:38:32,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:38:32,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 16:38:32,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 69 transitions, 458 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 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) [2024-06-21 16:38:32,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:38:32,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 16:38:32,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:38:32,836 INFO L124 PetriNetUnfolderBase]: 1729/2660 cut-off events. [2024-06-21 16:38:32,837 INFO L125 PetriNetUnfolderBase]: For 12020/12030 co-relation queries the response was YES. [2024-06-21 16:38:32,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10270 conditions, 2660 events. 1729/2660 cut-off events. For 12020/12030 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12689 event pairs, 647 based on Foata normal form. 2/2646 useless extension candidates. Maximal degree in co-relation 10241. Up to 2530 conditions per place. [2024-06-21 16:38:32,852 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 66 selfloop transitions, 11 changer transitions 0/84 dead transitions. [2024-06-21 16:38:32,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 84 transitions, 650 flow [2024-06-21 16:38:32,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:38:32,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:38:32,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-21 16:38:32,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4349593495934959 [2024-06-21 16:38:32,854 INFO L175 Difference]: Start difference. First operand has 67 places, 69 transitions, 458 flow. Second operand 6 states and 107 transitions. [2024-06-21 16:38:32,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 84 transitions, 650 flow [2024-06-21 16:38:32,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 84 transitions, 621 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 16:38:32,864 INFO L231 Difference]: Finished difference. Result has 70 places, 69 transitions, 459 flow [2024-06-21 16:38:32,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=459, PETRI_PLACES=70, PETRI_TRANSITIONS=69} [2024-06-21 16:38:32,865 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 28 predicate places. [2024-06-21 16:38:32,865 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 69 transitions, 459 flow [2024-06-21 16:38:32,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 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) [2024-06-21 16:38:32,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:38:32,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:38:32,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 16:38:32,866 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)] === [2024-06-21 16:38:32,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:38:32,866 INFO L85 PathProgramCache]: Analyzing trace with hash -62117735, now seen corresponding path program 1 times [2024-06-21 16:38:32,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:38:32,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915389238] [2024-06-21 16:38:32,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:38:32,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:38:32,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:38:33,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:38:33,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:38:33,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915389238] [2024-06-21 16:38:33,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915389238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:38:33,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:38:33,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:38:33,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453282983] [2024-06-21 16:38:33,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:38:33,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:38:33,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:38:33,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:38:33,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:38:33,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:38:33,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 69 transitions, 459 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:33,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:38:33,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:38:33,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:38:33,954 INFO L124 PetriNetUnfolderBase]: 2091/3095 cut-off events. [2024-06-21 16:38:33,954 INFO L125 PetriNetUnfolderBase]: For 17153/17153 co-relation queries the response was YES. [2024-06-21 16:38:33,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12368 conditions, 3095 events. 2091/3095 cut-off events. For 17153/17153 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 14121 event pairs, 649 based on Foata normal form. 12/3106 useless extension candidates. Maximal degree in co-relation 12338. Up to 2721 conditions per place. [2024-06-21 16:38:33,968 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 87 selfloop transitions, 31 changer transitions 0/121 dead transitions. [2024-06-21 16:38:33,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 121 transitions, 985 flow [2024-06-21 16:38:33,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:38:33,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:38:33,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-21 16:38:33,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4843205574912892 [2024-06-21 16:38:33,970 INFO L175 Difference]: Start difference. First operand has 70 places, 69 transitions, 459 flow. Second operand 7 states and 139 transitions. [2024-06-21 16:38:33,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 121 transitions, 985 flow [2024-06-21 16:38:33,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 121 transitions, 938 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 16:38:33,982 INFO L231 Difference]: Finished difference. Result has 74 places, 88 transitions, 660 flow [2024-06-21 16:38:33,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=660, PETRI_PLACES=74, PETRI_TRANSITIONS=88} [2024-06-21 16:38:33,983 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 32 predicate places. [2024-06-21 16:38:33,983 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 88 transitions, 660 flow [2024-06-21 16:38:33,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:33,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:38:33,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:38:33,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 16:38:33,984 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)] === [2024-06-21 16:38:33,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:38:33,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1679359571, now seen corresponding path program 2 times [2024-06-21 16:38:33,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:38:33,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645607557] [2024-06-21 16:38:33,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:38:33,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:38:33,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:38:34,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:38:34,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:38:34,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645607557] [2024-06-21 16:38:34,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645607557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:38:34,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:38:34,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:38:34,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651561008] [2024-06-21 16:38:34,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:38:34,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:38:34,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:38:34,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:38:34,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:38:34,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:38:34,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 88 transitions, 660 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:34,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:38:34,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:38:34,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:38:35,036 INFO L124 PetriNetUnfolderBase]: 2127/3145 cut-off events. [2024-06-21 16:38:35,036 INFO L125 PetriNetUnfolderBase]: For 22864/22864 co-relation queries the response was YES. [2024-06-21 16:38:35,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14507 conditions, 3145 events. 2127/3145 cut-off events. For 22864/22864 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 14321 event pairs, 700 based on Foata normal form. 6/3150 useless extension candidates. Maximal degree in co-relation 14473. Up to 3007 conditions per place. [2024-06-21 16:38:35,052 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 97 selfloop transitions, 23 changer transitions 0/123 dead transitions. [2024-06-21 16:38:35,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 123 transitions, 1142 flow [2024-06-21 16:38:35,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:38:35,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:38:35,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-21 16:38:35,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44947735191637633 [2024-06-21 16:38:35,053 INFO L175 Difference]: Start difference. First operand has 74 places, 88 transitions, 660 flow. Second operand 7 states and 129 transitions. [2024-06-21 16:38:35,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 123 transitions, 1142 flow [2024-06-21 16:38:35,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 123 transitions, 1098 flow, removed 21 selfloop flow, removed 1 redundant places. [2024-06-21 16:38:35,071 INFO L231 Difference]: Finished difference. Result has 81 places, 96 transitions, 768 flow [2024-06-21 16:38:35,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=624, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=768, PETRI_PLACES=81, PETRI_TRANSITIONS=96} [2024-06-21 16:38:35,071 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 39 predicate places. [2024-06-21 16:38:35,071 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 96 transitions, 768 flow [2024-06-21 16:38:35,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:35,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:38:35,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:38:35,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 16:38:35,072 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)] === [2024-06-21 16:38:35,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:38:35,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1691865281, now seen corresponding path program 3 times [2024-06-21 16:38:35,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:38:35,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757619111] [2024-06-21 16:38:35,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:38:35,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:38:35,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:38:35,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:38:35,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:38:35,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757619111] [2024-06-21 16:38:35,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757619111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:38:35,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:38:35,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:38:35,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858444331] [2024-06-21 16:38:35,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:38:35,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:38:35,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:38:35,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:38:35,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:38:35,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:38:35,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 96 transitions, 768 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:35,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:38:35,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:38:35,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:38:36,144 INFO L124 PetriNetUnfolderBase]: 2131/3151 cut-off events. [2024-06-21 16:38:36,144 INFO L125 PetriNetUnfolderBase]: For 27428/27428 co-relation queries the response was YES. [2024-06-21 16:38:36,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15155 conditions, 3151 events. 2131/3151 cut-off events. For 27428/27428 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 14366 event pairs, 694 based on Foata normal form. 6/3156 useless extension candidates. Maximal degree in co-relation 15117. Up to 3076 conditions per place. [2024-06-21 16:38:36,165 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 100 selfloop transitions, 21 changer transitions 0/124 dead transitions. [2024-06-21 16:38:36,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 124 transitions, 1170 flow [2024-06-21 16:38:36,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:38:36,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:38:36,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-21 16:38:36,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355400696864111 [2024-06-21 16:38:36,166 INFO L175 Difference]: Start difference. First operand has 81 places, 96 transitions, 768 flow. Second operand 7 states and 125 transitions. [2024-06-21 16:38:36,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 124 transitions, 1170 flow [2024-06-21 16:38:36,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 124 transitions, 1121 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-21 16:38:36,184 INFO L231 Difference]: Finished difference. Result has 86 places, 102 transitions, 846 flow [2024-06-21 16:38:36,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=722, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=846, PETRI_PLACES=86, PETRI_TRANSITIONS=102} [2024-06-21 16:38:36,185 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 44 predicate places. [2024-06-21 16:38:36,185 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 102 transitions, 846 flow [2024-06-21 16:38:36,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:36,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:38:36,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:38:36,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 16:38:36,186 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)] === [2024-06-21 16:38:36,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:38:36,186 INFO L85 PathProgramCache]: Analyzing trace with hash 115259863, now seen corresponding path program 1 times [2024-06-21 16:38:36,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:38:36,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70644025] [2024-06-21 16:38:36,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:38:36,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:38:36,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:38:37,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:38:37,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:38:37,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70644025] [2024-06-21 16:38:37,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70644025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:38:37,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:38:37,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:38:37,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093431514] [2024-06-21 16:38:37,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:38:37,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:38:37,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:38:37,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:38:37,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:38:37,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:38:37,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 102 transitions, 846 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 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) [2024-06-21 16:38:37,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:38:37,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:38:37,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:38:37,726 INFO L124 PetriNetUnfolderBase]: 2134/3156 cut-off events. [2024-06-21 16:38:37,727 INFO L125 PetriNetUnfolderBase]: For 30079/30079 co-relation queries the response was YES. [2024-06-21 16:38:37,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15526 conditions, 3156 events. 2134/3156 cut-off events. For 30079/30079 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 14430 event pairs, 673 based on Foata normal form. 6/3161 useless extension candidates. Maximal degree in co-relation 15486. Up to 3061 conditions per place. [2024-06-21 16:38:37,776 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 99 selfloop transitions, 25 changer transitions 0/127 dead transitions. [2024-06-21 16:38:37,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 127 transitions, 1228 flow [2024-06-21 16:38:37,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:38:37,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:38:37,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 16:38:37,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 16:38:37,777 INFO L175 Difference]: Start difference. First operand has 86 places, 102 transitions, 846 flow. Second operand 7 states and 126 transitions. [2024-06-21 16:38:37,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 127 transitions, 1228 flow [2024-06-21 16:38:37,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 127 transitions, 1175 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 16:38:37,796 INFO L231 Difference]: Finished difference. Result has 89 places, 105 transitions, 889 flow [2024-06-21 16:38:37,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=793, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=889, PETRI_PLACES=89, PETRI_TRANSITIONS=105} [2024-06-21 16:38:37,797 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2024-06-21 16:38:37,797 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 105 transitions, 889 flow [2024-06-21 16:38:37,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 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) [2024-06-21 16:38:37,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:38:37,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:38:37,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 16:38:37,798 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)] === [2024-06-21 16:38:37,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:38:37,798 INFO L85 PathProgramCache]: Analyzing trace with hash -842309822, now seen corresponding path program 1 times [2024-06-21 16:38:37,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:38:37,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894656970] [2024-06-21 16:38:37,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:38:37,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:38:37,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:38:38,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:38:38,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:38:38,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894656970] [2024-06-21 16:38:38,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894656970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:38:38,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:38:38,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:38:38,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768311175] [2024-06-21 16:38:38,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:38:38,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:38:38,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:38:38,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:38:38,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:38:38,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:38:38,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 105 transitions, 889 flow. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:38,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:38:38,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:38:38,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:38:38,643 INFO L124 PetriNetUnfolderBase]: 2131/3152 cut-off events. [2024-06-21 16:38:38,644 INFO L125 PetriNetUnfolderBase]: For 32999/32999 co-relation queries the response was YES. [2024-06-21 16:38:38,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15971 conditions, 3152 events. 2131/3152 cut-off events. For 32999/32999 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 14345 event pairs, 697 based on Foata normal form. 1/3152 useless extension candidates. Maximal degree in co-relation 15930. Up to 3137 conditions per place. [2024-06-21 16:38:38,661 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 102 selfloop transitions, 8 changer transitions 0/113 dead transitions. [2024-06-21 16:38:38,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 113 transitions, 1129 flow [2024-06-21 16:38:38,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:38:38,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:38:38,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2024-06-21 16:38:38,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40487804878048783 [2024-06-21 16:38:38,662 INFO L175 Difference]: Start difference. First operand has 89 places, 105 transitions, 889 flow. Second operand 5 states and 83 transitions. [2024-06-21 16:38:38,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 113 transitions, 1129 flow [2024-06-21 16:38:38,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 113 transitions, 1049 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 16:38:38,681 INFO L231 Difference]: Finished difference. Result has 89 places, 105 transitions, 831 flow [2024-06-21 16:38:38,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=809, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=831, PETRI_PLACES=89, PETRI_TRANSITIONS=105} [2024-06-21 16:38:38,681 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2024-06-21 16:38:38,682 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 105 transitions, 831 flow [2024-06-21 16:38:38,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:38,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:38:38,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:38:38,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 16:38:38,682 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)] === [2024-06-21 16:38:38,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:38:38,683 INFO L85 PathProgramCache]: Analyzing trace with hash 663410780, now seen corresponding path program 1 times [2024-06-21 16:38:38,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:38:38,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733603848] [2024-06-21 16:38:38,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:38:38,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:38:38,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:38:39,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:38:39,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:38:39,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733603848] [2024-06-21 16:38:39,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733603848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:38:39,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:38:39,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:38:39,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829792373] [2024-06-21 16:38:39,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:38:39,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:38:39,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:38:39,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:38:39,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:38:39,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 16:38:39,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 105 transitions, 831 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) [2024-06-21 16:38:39,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:38:39,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 16:38:39,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:38:39,867 INFO L124 PetriNetUnfolderBase]: 2008/3035 cut-off events. [2024-06-21 16:38:39,867 INFO L125 PetriNetUnfolderBase]: For 35200/35236 co-relation queries the response was YES. [2024-06-21 16:38:39,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15402 conditions, 3035 events. 2008/3035 cut-off events. For 35200/35236 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 14309 event pairs, 612 based on Foata normal form. 14/3028 useless extension candidates. Maximal degree in co-relation 15360. Up to 2758 conditions per place. [2024-06-21 16:38:39,887 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 96 selfloop transitions, 26 changer transitions 0/138 dead transitions. [2024-06-21 16:38:39,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 138 transitions, 1277 flow [2024-06-21 16:38:39,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:38:39,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:38:39,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-21 16:38:39,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47038327526132406 [2024-06-21 16:38:39,889 INFO L175 Difference]: Start difference. First operand has 89 places, 105 transitions, 831 flow. Second operand 7 states and 135 transitions. [2024-06-21 16:38:39,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 138 transitions, 1277 flow [2024-06-21 16:38:39,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 138 transitions, 1253 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 16:38:39,912 INFO L231 Difference]: Finished difference. Result has 92 places, 111 transitions, 953 flow [2024-06-21 16:38:39,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=807, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=953, PETRI_PLACES=92, PETRI_TRANSITIONS=111} [2024-06-21 16:38:39,913 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 50 predicate places. [2024-06-21 16:38:39,913 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 111 transitions, 953 flow [2024-06-21 16:38:39,913 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) [2024-06-21 16:38:39,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:38:39,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:38:39,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 16:38:39,914 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)] === [2024-06-21 16:38:39,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:38:39,914 INFO L85 PathProgramCache]: Analyzing trace with hash 663500990, now seen corresponding path program 2 times [2024-06-21 16:38:39,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:38:39,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873944405] [2024-06-21 16:38:39,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:38:39,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:38:39,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:38:40,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:38:40,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:38:40,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873944405] [2024-06-21 16:38:40,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873944405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:38:40,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:38:40,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:38:40,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762960278] [2024-06-21 16:38:40,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:38:40,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:38:40,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:38:40,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:38:40,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:38:40,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 16:38:40,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 111 transitions, 953 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) [2024-06-21 16:38:40,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:38:40,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 16:38:40,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:38:41,137 INFO L124 PetriNetUnfolderBase]: 2003/3028 cut-off events. [2024-06-21 16:38:41,137 INFO L125 PetriNetUnfolderBase]: For 39866/39902 co-relation queries the response was YES. [2024-06-21 16:38:41,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15997 conditions, 3028 events. 2003/3028 cut-off events. For 39866/39902 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 14288 event pairs, 612 based on Foata normal form. 14/3021 useless extension candidates. Maximal degree in co-relation 15955. Up to 2786 conditions per place. [2024-06-21 16:38:41,153 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 95 selfloop transitions, 22 changer transitions 0/133 dead transitions. [2024-06-21 16:38:41,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 133 transitions, 1243 flow [2024-06-21 16:38:41,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:38:41,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:38:41,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-21 16:38:41,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2024-06-21 16:38:41,154 INFO L175 Difference]: Start difference. First operand has 92 places, 111 transitions, 953 flow. Second operand 7 states and 130 transitions. [2024-06-21 16:38:41,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 133 transitions, 1243 flow [2024-06-21 16:38:41,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 133 transitions, 1162 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-21 16:38:41,183 INFO L231 Difference]: Finished difference. Result has 96 places, 111 transitions, 924 flow [2024-06-21 16:38:41,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=872, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=924, PETRI_PLACES=96, PETRI_TRANSITIONS=111} [2024-06-21 16:38:41,183 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 54 predicate places. [2024-06-21 16:38:41,183 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 111 transitions, 924 flow [2024-06-21 16:38:41,184 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) [2024-06-21 16:38:41,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:38:41,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:38:41,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 16:38:41,184 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)] === [2024-06-21 16:38:41,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:38:41,185 INFO L85 PathProgramCache]: Analyzing trace with hash 667225795, now seen corresponding path program 1 times [2024-06-21 16:38:41,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:38:41,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966733160] [2024-06-21 16:38:41,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:38:41,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:38:41,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:38:41,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:38:41,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:38:41,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966733160] [2024-06-21 16:38:41,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966733160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:38:41,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:38:41,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:38:41,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079386756] [2024-06-21 16:38:41,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:38:41,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:38:41,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:38:41,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:38:41,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:38:41,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:38:41,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 111 transitions, 924 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:41,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:38:41,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:38:41,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:38:42,265 INFO L124 PetriNetUnfolderBase]: 2221/3283 cut-off events. [2024-06-21 16:38:42,266 INFO L125 PetriNetUnfolderBase]: For 46889/46891 co-relation queries the response was YES. [2024-06-21 16:38:42,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17710 conditions, 3283 events. 2221/3283 cut-off events. For 46889/46891 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 15052 event pairs, 639 based on Foata normal form. 8/3290 useless extension candidates. Maximal degree in co-relation 17666. Up to 2821 conditions per place. [2024-06-21 16:38:42,286 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 102 selfloop transitions, 47 changer transitions 0/152 dead transitions. [2024-06-21 16:38:42,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 152 transitions, 1598 flow [2024-06-21 16:38:42,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:38:42,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:38:42,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-21 16:38:42,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4808362369337979 [2024-06-21 16:38:42,288 INFO L175 Difference]: Start difference. First operand has 96 places, 111 transitions, 924 flow. Second operand 7 states and 138 transitions. [2024-06-21 16:38:42,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 152 transitions, 1598 flow [2024-06-21 16:38:42,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 152 transitions, 1543 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 16:38:42,319 INFO L231 Difference]: Finished difference. Result has 99 places, 120 transitions, 1131 flow [2024-06-21 16:38:42,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=869, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1131, PETRI_PLACES=99, PETRI_TRANSITIONS=120} [2024-06-21 16:38:42,319 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 57 predicate places. [2024-06-21 16:38:42,319 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 120 transitions, 1131 flow [2024-06-21 16:38:42,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:42,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:38:42,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:38:42,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 16:38:42,320 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:38:42,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:38:42,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1925654069, now seen corresponding path program 2 times [2024-06-21 16:38:42,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:38:42,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625234090] [2024-06-21 16:38:42,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:38:42,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:38:42,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:38:42,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:38:42,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:38:42,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625234090] [2024-06-21 16:38:42,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625234090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:38:42,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:38:42,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:38:42,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548178051] [2024-06-21 16:38:42,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:38:42,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:38:42,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:38:42,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:38:42,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:38:42,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:38:42,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 120 transitions, 1131 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:42,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:38:42,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:38:42,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:38:43,517 INFO L124 PetriNetUnfolderBase]: 2209/3267 cut-off events. [2024-06-21 16:38:43,518 INFO L125 PetriNetUnfolderBase]: For 53119/53121 co-relation queries the response was YES. [2024-06-21 16:38:43,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18644 conditions, 3267 events. 2209/3267 cut-off events. For 53119/53121 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 14970 event pairs, 636 based on Foata normal form. 8/3274 useless extension candidates. Maximal degree in co-relation 18597. Up to 2815 conditions per place. [2024-06-21 16:38:43,539 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 103 selfloop transitions, 50 changer transitions 0/156 dead transitions. [2024-06-21 16:38:43,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 156 transitions, 1721 flow [2024-06-21 16:38:43,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:38:43,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:38:43,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-21 16:38:43,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4912891986062718 [2024-06-21 16:38:43,547 INFO L175 Difference]: Start difference. First operand has 99 places, 120 transitions, 1131 flow. Second operand 7 states and 141 transitions. [2024-06-21 16:38:43,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 156 transitions, 1721 flow [2024-06-21 16:38:43,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 156 transitions, 1626 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-21 16:38:43,607 INFO L231 Difference]: Finished difference. Result has 105 places, 123 transitions, 1239 flow [2024-06-21 16:38:43,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1037, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1239, PETRI_PLACES=105, PETRI_TRANSITIONS=123} [2024-06-21 16:38:43,607 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 63 predicate places. [2024-06-21 16:38:43,607 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 123 transitions, 1239 flow [2024-06-21 16:38:43,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:43,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:38:43,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:38:43,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 16:38:43,608 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)] === [2024-06-21 16:38:43,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:38:43,609 INFO L85 PathProgramCache]: Analyzing trace with hash 939064244, now seen corresponding path program 1 times [2024-06-21 16:38:43,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:38:43,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110520406] [2024-06-21 16:38:43,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:38:43,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:38:43,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:38:44,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:38:44,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:38:44,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110520406] [2024-06-21 16:38:44,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110520406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:38:44,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:38:44,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:38:44,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841593892] [2024-06-21 16:38:44,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:38:44,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:38:44,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:38:44,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:38:44,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:38:44,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:38:44,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 123 transitions, 1239 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 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) [2024-06-21 16:38:44,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:38:44,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:38:44,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:38:44,929 INFO L124 PetriNetUnfolderBase]: 2211/3268 cut-off events. [2024-06-21 16:38:44,929 INFO L125 PetriNetUnfolderBase]: For 57583/57583 co-relation queries the response was YES. [2024-06-21 16:38:44,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19257 conditions, 3268 events. 2211/3268 cut-off events. For 57583/57583 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 14983 event pairs, 669 based on Foata normal form. 3/3270 useless extension candidates. Maximal degree in co-relation 19207. Up to 3162 conditions per place. [2024-06-21 16:38:44,951 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 115 selfloop transitions, 30 changer transitions 0/148 dead transitions. [2024-06-21 16:38:44,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 148 transitions, 1675 flow [2024-06-21 16:38:44,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:38:44,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:38:44,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 16:38:44,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 16:38:44,953 INFO L175 Difference]: Start difference. First operand has 105 places, 123 transitions, 1239 flow. Second operand 7 states and 126 transitions. [2024-06-21 16:38:44,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 148 transitions, 1675 flow [2024-06-21 16:38:44,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 148 transitions, 1580 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 16:38:44,995 INFO L231 Difference]: Finished difference. Result has 107 places, 127 transitions, 1282 flow [2024-06-21 16:38:44,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1146, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1282, PETRI_PLACES=107, PETRI_TRANSITIONS=127} [2024-06-21 16:38:44,996 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 65 predicate places. [2024-06-21 16:38:44,996 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 127 transitions, 1282 flow [2024-06-21 16:38:44,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 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) [2024-06-21 16:38:44,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:38:44,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:38:44,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 16:38:44,996 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)] === [2024-06-21 16:38:44,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:38:44,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1806864895, now seen corresponding path program 3 times [2024-06-21 16:38:44,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:38:44,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249951468] [2024-06-21 16:38:44,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:38:44,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:38:45,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:38:45,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:38:45,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:38:45,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249951468] [2024-06-21 16:38:45,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249951468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:38:45,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:38:45,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:38:45,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330459268] [2024-06-21 16:38:45,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:38:45,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:38:45,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:38:45,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:38:45,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:38:45,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:38:45,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 127 transitions, 1282 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:45,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:38:45,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:38:45,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:38:46,090 INFO L124 PetriNetUnfolderBase]: 2215/3275 cut-off events. [2024-06-21 16:38:46,091 INFO L125 PetriNetUnfolderBase]: For 61742/61748 co-relation queries the response was YES. [2024-06-21 16:38:46,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19521 conditions, 3275 events. 2215/3275 cut-off events. For 61742/61748 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 15035 event pairs, 674 based on Foata normal form. 12/3286 useless extension candidates. Maximal degree in co-relation 19471. Up to 3167 conditions per place. [2024-06-21 16:38:46,113 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 127 selfloop transitions, 23 changer transitions 0/153 dead transitions. [2024-06-21 16:38:46,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 153 transitions, 1737 flow [2024-06-21 16:38:46,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:38:46,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:38:46,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 16:38:46,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 16:38:46,115 INFO L175 Difference]: Start difference. First operand has 107 places, 127 transitions, 1282 flow. Second operand 7 states and 126 transitions. [2024-06-21 16:38:46,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 153 transitions, 1737 flow [2024-06-21 16:38:46,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 153 transitions, 1651 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 16:38:46,163 INFO L231 Difference]: Finished difference. Result has 109 places, 131 transitions, 1318 flow [2024-06-21 16:38:46,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1196, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1318, PETRI_PLACES=109, PETRI_TRANSITIONS=131} [2024-06-21 16:38:46,169 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 67 predicate places. [2024-06-21 16:38:46,170 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 131 transitions, 1318 flow [2024-06-21 16:38:46,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:46,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:38:46,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:38:46,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 16:38:46,170 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:38:46,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:38:46,171 INFO L85 PathProgramCache]: Analyzing trace with hash -341799338, now seen corresponding path program 1 times [2024-06-21 16:38:46,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:38:46,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820579314] [2024-06-21 16:38:46,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:38:46,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:38:46,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:38:46,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:38:46,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:38:46,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820579314] [2024-06-21 16:38:46,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820579314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:38:46,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:38:46,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:38:46,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310693085] [2024-06-21 16:38:46,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:38:46,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:38:46,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:38:46,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:38:46,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:38:46,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:38:46,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 131 transitions, 1318 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 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) [2024-06-21 16:38:46,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:38:46,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:38:46,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:38:47,287 INFO L124 PetriNetUnfolderBase]: 2206/3262 cut-off events. [2024-06-21 16:38:47,287 INFO L125 PetriNetUnfolderBase]: For 65960/65960 co-relation queries the response was YES. [2024-06-21 16:38:47,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19727 conditions, 3262 events. 2206/3262 cut-off events. For 65960/65960 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 14833 event pairs, 674 based on Foata normal form. 3/3264 useless extension candidates. Maximal degree in co-relation 19676. Up to 3238 conditions per place. [2024-06-21 16:38:47,308 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 131 selfloop transitions, 11 changer transitions 0/145 dead transitions. [2024-06-21 16:38:47,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 145 transitions, 1654 flow [2024-06-21 16:38:47,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:38:47,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:38:47,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-21 16:38:47,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3943089430894309 [2024-06-21 16:38:47,310 INFO L175 Difference]: Start difference. First operand has 109 places, 131 transitions, 1318 flow. Second operand 6 states and 97 transitions. [2024-06-21 16:38:47,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 145 transitions, 1654 flow [2024-06-21 16:38:47,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 145 transitions, 1583 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 16:38:47,353 INFO L231 Difference]: Finished difference. Result has 110 places, 134 transitions, 1307 flow [2024-06-21 16:38:47,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1247, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1307, PETRI_PLACES=110, PETRI_TRANSITIONS=134} [2024-06-21 16:38:47,353 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 68 predicate places. [2024-06-21 16:38:47,353 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 134 transitions, 1307 flow [2024-06-21 16:38:47,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 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) [2024-06-21 16:38:47,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:38:47,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:38:47,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 16:38:47,354 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:38:47,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:38:47,355 INFO L85 PathProgramCache]: Analyzing trace with hash 316114428, now seen corresponding path program 1 times [2024-06-21 16:38:47,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:38:47,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342728970] [2024-06-21 16:38:47,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:38:47,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:38:47,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:38:48,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:38:48,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:38:48,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342728970] [2024-06-21 16:38:48,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342728970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:38:48,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:38:48,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:38:48,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257522564] [2024-06-21 16:38:48,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:38:48,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:38:48,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:38:48,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:38:48,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:38:48,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 16:38:48,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 134 transitions, 1307 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:48,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:38:48,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 16:38:48,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:38:48,809 INFO L124 PetriNetUnfolderBase]: 2088/3153 cut-off events. [2024-06-21 16:38:48,809 INFO L125 PetriNetUnfolderBase]: For 68688/68739 co-relation queries the response was YES. [2024-06-21 16:38:48,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19410 conditions, 3153 events. 2088/3153 cut-off events. For 68688/68739 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 15013 event pairs, 452 based on Foata normal form. 15/3148 useless extension candidates. Maximal degree in co-relation 19358. Up to 2758 conditions per place. [2024-06-21 16:38:48,832 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 118 selfloop transitions, 32 changer transitions 0/171 dead transitions. [2024-06-21 16:38:48,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 171 transitions, 1865 flow [2024-06-21 16:38:48,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:38:48,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:38:48,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 16:38:48,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-21 16:38:48,833 INFO L175 Difference]: Start difference. First operand has 110 places, 134 transitions, 1307 flow. Second operand 8 states and 152 transitions. [2024-06-21 16:38:48,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 171 transitions, 1865 flow [2024-06-21 16:38:48,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 171 transitions, 1827 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 16:38:48,875 INFO L231 Difference]: Finished difference. Result has 114 places, 138 transitions, 1440 flow [2024-06-21 16:38:48,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1269, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1440, PETRI_PLACES=114, PETRI_TRANSITIONS=138} [2024-06-21 16:38:48,875 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 72 predicate places. [2024-06-21 16:38:48,875 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 138 transitions, 1440 flow [2024-06-21 16:38:48,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:48,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:38:48,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:38:48,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 16:38:48,876 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)] === [2024-06-21 16:38:48,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:38:48,877 INFO L85 PathProgramCache]: Analyzing trace with hash 316175002, now seen corresponding path program 1 times [2024-06-21 16:38:48,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:38:48,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337943929] [2024-06-21 16:38:48,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:38:48,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:38:48,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:38:49,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:38:49,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:38:49,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337943929] [2024-06-21 16:38:49,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337943929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:38:49,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:38:49,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:38:49,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861748219] [2024-06-21 16:38:49,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:38:49,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:38:49,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:38:49,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:38:49,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:38:49,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:38:49,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 138 transitions, 1440 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:49,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:38:49,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:38:49,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:38:50,385 INFO L124 PetriNetUnfolderBase]: 2307/3410 cut-off events. [2024-06-21 16:38:50,386 INFO L125 PetriNetUnfolderBase]: For 79963/79965 co-relation queries the response was YES. [2024-06-21 16:38:50,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21539 conditions, 3410 events. 2307/3410 cut-off events. For 79963/79965 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 15801 event pairs, 550 based on Foata normal form. 8/3417 useless extension candidates. Maximal degree in co-relation 21486. Up to 2735 conditions per place. [2024-06-21 16:38:50,407 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 131 selfloop transitions, 67 changer transitions 0/201 dead transitions. [2024-06-21 16:38:50,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 201 transitions, 2420 flow [2024-06-21 16:38:50,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:38:50,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:38:50,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-21 16:38:50,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48292682926829267 [2024-06-21 16:38:50,409 INFO L175 Difference]: Start difference. First operand has 114 places, 138 transitions, 1440 flow. Second operand 10 states and 198 transitions. [2024-06-21 16:38:50,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 201 transitions, 2420 flow [2024-06-21 16:38:50,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 201 transitions, 2330 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-21 16:38:50,464 INFO L231 Difference]: Finished difference. Result has 122 places, 150 transitions, 1674 flow [2024-06-21 16:38:50,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1350, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1674, PETRI_PLACES=122, PETRI_TRANSITIONS=150} [2024-06-21 16:38:50,464 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 80 predicate places. [2024-06-21 16:38:50,465 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 150 transitions, 1674 flow [2024-06-21 16:38:50,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:50,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:38:50,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:38:50,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 16:38:50,465 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)] === [2024-06-21 16:38:50,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:38:50,466 INFO L85 PathProgramCache]: Analyzing trace with hash 316174878, now seen corresponding path program 2 times [2024-06-21 16:38:50,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:38:50,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139451419] [2024-06-21 16:38:50,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:38:50,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:38:50,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:38:51,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:38:51,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:38:51,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139451419] [2024-06-21 16:38:51,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139451419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:38:51,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:38:51,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:38:51,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026495502] [2024-06-21 16:38:51,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:38:51,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:38:51,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:38:51,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:38:51,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:38:51,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 16:38:51,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 150 transitions, 1674 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:51,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:38:51,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 16:38:51,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:38:51,964 INFO L124 PetriNetUnfolderBase]: 2190/3286 cut-off events. [2024-06-21 16:38:51,964 INFO L125 PetriNetUnfolderBase]: For 85408/85459 co-relation queries the response was YES. [2024-06-21 16:38:51,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21792 conditions, 3286 events. 2190/3286 cut-off events. For 85408/85459 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 15595 event pairs, 574 based on Foata normal form. 15/3281 useless extension candidates. Maximal degree in co-relation 21735. Up to 2953 conditions per place. [2024-06-21 16:38:51,991 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 129 selfloop transitions, 31 changer transitions 0/184 dead transitions. [2024-06-21 16:38:51,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 184 transitions, 2080 flow [2024-06-21 16:38:51,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:38:51,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:38:51,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 16:38:51,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44986449864498645 [2024-06-21 16:38:51,993 INFO L175 Difference]: Start difference. First operand has 122 places, 150 transitions, 1674 flow. Second operand 9 states and 166 transitions. [2024-06-21 16:38:51,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 184 transitions, 2080 flow [2024-06-21 16:38:52,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 184 transitions, 1913 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-21 16:38:52,062 INFO L231 Difference]: Finished difference. Result has 126 places, 150 transitions, 1577 flow [2024-06-21 16:38:52,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1507, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1577, PETRI_PLACES=126, PETRI_TRANSITIONS=150} [2024-06-21 16:38:52,063 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 84 predicate places. [2024-06-21 16:38:52,063 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 150 transitions, 1577 flow [2024-06-21 16:38:52,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:52,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:38:52,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:38:52,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 16:38:52,064 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)] === [2024-06-21 16:38:52,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:38:52,064 INFO L85 PathProgramCache]: Analyzing trace with hash -791013138, now seen corresponding path program 2 times [2024-06-21 16:38:52,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:38:52,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273229467] [2024-06-21 16:38:52,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:38:52,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:38:52,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:38:52,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:38:52,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:38:52,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273229467] [2024-06-21 16:38:52,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273229467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:38:52,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:38:52,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:38:52,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609338094] [2024-06-21 16:38:52,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:38:52,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:38:52,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:38:52,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:38:52,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:38:52,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:38:52,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 150 transitions, 1577 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:52,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:38:52,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:38:52,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:38:53,571 INFO L124 PetriNetUnfolderBase]: 2335/3450 cut-off events. [2024-06-21 16:38:53,571 INFO L125 PetriNetUnfolderBase]: For 93783/93785 co-relation queries the response was YES. [2024-06-21 16:38:53,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22981 conditions, 3450 events. 2335/3450 cut-off events. For 93783/93785 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 16062 event pairs, 533 based on Foata normal form. 8/3457 useless extension candidates. Maximal degree in co-relation 22922. Up to 2847 conditions per place. [2024-06-21 16:38:53,601 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 134 selfloop transitions, 65 changer transitions 0/202 dead transitions. [2024-06-21 16:38:53,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 202 transitions, 2450 flow [2024-06-21 16:38:53,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:38:53,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:38:53,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-21 16:38:53,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4905149051490515 [2024-06-21 16:38:53,603 INFO L175 Difference]: Start difference. First operand has 126 places, 150 transitions, 1577 flow. Second operand 9 states and 181 transitions. [2024-06-21 16:38:53,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 202 transitions, 2450 flow [2024-06-21 16:38:53,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 202 transitions, 2380 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 16:38:53,709 INFO L231 Difference]: Finished difference. Result has 128 places, 155 transitions, 1746 flow [2024-06-21 16:38:53,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1507, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1746, PETRI_PLACES=128, PETRI_TRANSITIONS=155} [2024-06-21 16:38:53,710 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 86 predicate places. [2024-06-21 16:38:53,710 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 155 transitions, 1746 flow [2024-06-21 16:38:53,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:53,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:38:53,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:38:53,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 16:38:53,711 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:38:53,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:38:53,711 INFO L85 PathProgramCache]: Analyzing trace with hash 434447256, now seen corresponding path program 1 times [2024-06-21 16:38:53,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:38:53,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297706686] [2024-06-21 16:38:53,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:38:53,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:38:53,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:38:54,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:38:54,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:38:54,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297706686] [2024-06-21 16:38:54,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297706686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:38:54,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:38:54,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:38:54,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499845227] [2024-06-21 16:38:54,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:38:54,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:38:54,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:38:54,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:38:54,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:38:54,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:38:54,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 155 transitions, 1746 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:54,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:38:54,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:38:54,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:38:55,249 INFO L124 PetriNetUnfolderBase]: 2391/3538 cut-off events. [2024-06-21 16:38:55,250 INFO L125 PetriNetUnfolderBase]: For 106723/106725 co-relation queries the response was YES. [2024-06-21 16:38:55,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24365 conditions, 3538 events. 2391/3538 cut-off events. For 106723/106725 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 16586 event pairs, 558 based on Foata normal form. 14/3551 useless extension candidates. Maximal degree in co-relation 24304. Up to 3037 conditions per place. [2024-06-21 16:38:55,275 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 136 selfloop transitions, 53 changer transitions 0/192 dead transitions. [2024-06-21 16:38:55,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 192 transitions, 2430 flow [2024-06-21 16:38:55,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:38:55,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:38:55,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 16:38:55,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725609756097561 [2024-06-21 16:38:55,277 INFO L175 Difference]: Start difference. First operand has 128 places, 155 transitions, 1746 flow. Second operand 8 states and 155 transitions. [2024-06-21 16:38:55,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 192 transitions, 2430 flow [2024-06-21 16:38:55,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 192 transitions, 2254 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-21 16:38:55,363 INFO L231 Difference]: Finished difference. Result has 129 places, 159 transitions, 1763 flow [2024-06-21 16:38:55,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1570, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1763, PETRI_PLACES=129, PETRI_TRANSITIONS=159} [2024-06-21 16:38:55,364 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 87 predicate places. [2024-06-21 16:38:55,364 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 159 transitions, 1763 flow [2024-06-21 16:38:55,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:55,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:38:55,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:38:55,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 16:38:55,365 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:38:55,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:38:55,365 INFO L85 PathProgramCache]: Analyzing trace with hash 434440312, now seen corresponding path program 3 times [2024-06-21 16:38:55,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:38:55,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507793949] [2024-06-21 16:38:55,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:38:55,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:38:55,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:38:56,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:38:56,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:38:56,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507793949] [2024-06-21 16:38:56,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507793949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:38:56,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:38:56,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:38:56,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347863260] [2024-06-21 16:38:56,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:38:56,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:38:56,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:38:56,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:38:56,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:38:56,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:38:56,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 159 transitions, 1763 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:56,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:38:56,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:38:56,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:38:56,933 INFO L124 PetriNetUnfolderBase]: 2427/3590 cut-off events. [2024-06-21 16:38:56,934 INFO L125 PetriNetUnfolderBase]: For 112441/112443 co-relation queries the response was YES. [2024-06-21 16:38:56,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25152 conditions, 3590 events. 2427/3590 cut-off events. For 112441/112443 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 16873 event pairs, 518 based on Foata normal form. 6/3595 useless extension candidates. Maximal degree in co-relation 25090. Up to 3045 conditions per place. [2024-06-21 16:38:56,962 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 134 selfloop transitions, 64 changer transitions 0/201 dead transitions. [2024-06-21 16:38:56,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 201 transitions, 2555 flow [2024-06-21 16:38:56,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:38:56,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:38:56,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 16:38:56,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695121951219512 [2024-06-21 16:38:56,979 INFO L175 Difference]: Start difference. First operand has 129 places, 159 transitions, 1763 flow. Second operand 8 states and 154 transitions. [2024-06-21 16:38:56,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 201 transitions, 2555 flow [2024-06-21 16:38:57,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 201 transitions, 2392 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-21 16:38:57,079 INFO L231 Difference]: Finished difference. Result has 132 places, 166 transitions, 1889 flow [2024-06-21 16:38:57,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1600, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1889, PETRI_PLACES=132, PETRI_TRANSITIONS=166} [2024-06-21 16:38:57,080 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 90 predicate places. [2024-06-21 16:38:57,080 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 166 transitions, 1889 flow [2024-06-21 16:38:57,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:57,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:38:57,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:38:57,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 16:38:57,081 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)] === [2024-06-21 16:38:57,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:38:57,081 INFO L85 PathProgramCache]: Analyzing trace with hash -283223773, now seen corresponding path program 1 times [2024-06-21 16:38:57,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:38:57,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932123886] [2024-06-21 16:38:57,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:38:57,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:38:57,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:38:57,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:38:57,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:38:57,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932123886] [2024-06-21 16:38:57,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932123886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:38:57,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:38:57,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:38:57,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197694937] [2024-06-21 16:38:57,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:38:57,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:38:57,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:38:57,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:38:57,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:38:57,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:38:57,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 166 transitions, 1889 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 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) [2024-06-21 16:38:57,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:38:57,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:38:57,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:38:58,095 INFO L124 PetriNetUnfolderBase]: 2432/3595 cut-off events. [2024-06-21 16:38:58,095 INFO L125 PetriNetUnfolderBase]: For 118569/118569 co-relation queries the response was YES. [2024-06-21 16:38:58,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25847 conditions, 3595 events. 2432/3595 cut-off events. For 118569/118569 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 16809 event pairs, 626 based on Foata normal form. 1/3595 useless extension candidates. Maximal degree in co-relation 25783. Up to 3558 conditions per place. [2024-06-21 16:38:58,128 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 166 selfloop transitions, 16 changer transitions 0/185 dead transitions. [2024-06-21 16:38:58,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 185 transitions, 2396 flow [2024-06-21 16:38:58,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:38:58,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:38:58,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-21 16:38:58,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-21 16:38:58,129 INFO L175 Difference]: Start difference. First operand has 132 places, 166 transitions, 1889 flow. Second operand 6 states and 104 transitions. [2024-06-21 16:38:58,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 185 transitions, 2396 flow [2024-06-21 16:38:58,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 185 transitions, 2258 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-21 16:38:58,223 INFO L231 Difference]: Finished difference. Result has 133 places, 169 transitions, 1838 flow [2024-06-21 16:38:58,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1752, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1838, PETRI_PLACES=133, PETRI_TRANSITIONS=169} [2024-06-21 16:38:58,224 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 91 predicate places. [2024-06-21 16:38:58,224 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 169 transitions, 1838 flow [2024-06-21 16:38:58,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 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) [2024-06-21 16:38:58,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:38:58,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:38:58,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 16:38:58,224 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:38:58,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:38:58,225 INFO L85 PathProgramCache]: Analyzing trace with hash -49655982, now seen corresponding path program 2 times [2024-06-21 16:38:58,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:38:58,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877646824] [2024-06-21 16:38:58,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:38:58,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:38:58,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:38:59,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:38:59,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:38:59,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877646824] [2024-06-21 16:38:59,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877646824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:38:59,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:38:59,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:38:59,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217030342] [2024-06-21 16:38:59,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:38:59,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:38:59,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:38:59,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:38:59,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:38:59,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:38:59,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 169 transitions, 1838 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:59,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:38:59,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:38:59,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:38:59,866 INFO L124 PetriNetUnfolderBase]: 2460/3639 cut-off events. [2024-06-21 16:38:59,866 INFO L125 PetriNetUnfolderBase]: For 126867/126867 co-relation queries the response was YES. [2024-06-21 16:38:59,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25917 conditions, 3639 events. 2460/3639 cut-off events. For 126867/126867 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 17122 event pairs, 613 based on Foata normal form. 6/3644 useless extension candidates. Maximal degree in co-relation 25852. Up to 3480 conditions per place. [2024-06-21 16:38:59,894 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 167 selfloop transitions, 30 changer transitions 0/200 dead transitions. [2024-06-21 16:38:59,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 200 transitions, 2490 flow [2024-06-21 16:38:59,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:38:59,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:38:59,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 16:38:59,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-21 16:38:59,896 INFO L175 Difference]: Start difference. First operand has 133 places, 169 transitions, 1838 flow. Second operand 8 states and 143 transitions. [2024-06-21 16:38:59,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 200 transitions, 2490 flow [2024-06-21 16:38:59,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 200 transitions, 2347 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 16:38:59,989 INFO L231 Difference]: Finished difference. Result has 135 places, 172 transitions, 1843 flow [2024-06-21 16:38:59,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1695, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1843, PETRI_PLACES=135, PETRI_TRANSITIONS=172} [2024-06-21 16:38:59,990 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 93 predicate places. [2024-06-21 16:38:59,990 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 172 transitions, 1843 flow [2024-06-21 16:38:59,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:59,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:38:59,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:38:59,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 16:38:59,991 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)] === [2024-06-21 16:38:59,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:38:59,991 INFO L85 PathProgramCache]: Analyzing trace with hash 178245168, now seen corresponding path program 3 times [2024-06-21 16:38:59,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:38:59,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905361168] [2024-06-21 16:38:59,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:38:59,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:38:59,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:00,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:39:00,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:00,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905361168] [2024-06-21 16:39:00,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905361168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:00,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:00,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:39:00,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775087982] [2024-06-21 16:39:00,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:00,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:39:00,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:00,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:39:00,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:39:00,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:39:00,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 172 transitions, 1843 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:00,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:00,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:39:00,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:01,543 INFO L124 PetriNetUnfolderBase]: 2488/3683 cut-off events. [2024-06-21 16:39:01,544 INFO L125 PetriNetUnfolderBase]: For 135591/135591 co-relation queries the response was YES. [2024-06-21 16:39:01,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26682 conditions, 3683 events. 2488/3683 cut-off events. For 135591/135591 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 17353 event pairs, 616 based on Foata normal form. 6/3688 useless extension candidates. Maximal degree in co-relation 26617. Up to 3584 conditions per place. [2024-06-21 16:39:01,574 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 174 selfloop transitions, 24 changer transitions 0/201 dead transitions. [2024-06-21 16:39:01,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 201 transitions, 2443 flow [2024-06-21 16:39:01,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:39:01,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:39:01,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 16:39:01,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-21 16:39:01,575 INFO L175 Difference]: Start difference. First operand has 135 places, 172 transitions, 1843 flow. Second operand 8 states and 140 transitions. [2024-06-21 16:39:01,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 201 transitions, 2443 flow [2024-06-21 16:39:01,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 201 transitions, 2319 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-21 16:39:01,720 INFO L231 Difference]: Finished difference. Result has 137 places, 175 transitions, 1861 flow [2024-06-21 16:39:01,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1719, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1861, PETRI_PLACES=137, PETRI_TRANSITIONS=175} [2024-06-21 16:39:01,721 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 95 predicate places. [2024-06-21 16:39:01,721 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 175 transitions, 1861 flow [2024-06-21 16:39:01,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:01,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:01,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:39:01,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 16:39:01,722 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)] === [2024-06-21 16:39:01,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:01,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1910349230, now seen corresponding path program 4 times [2024-06-21 16:39:01,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:01,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807524751] [2024-06-21 16:39:01,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:01,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:01,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:02,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:39:02,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:02,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807524751] [2024-06-21 16:39:02,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807524751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:02,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:02,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:39:02,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756403273] [2024-06-21 16:39:02,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:02,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:39:02,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:02,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:39:02,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:39:02,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:39:02,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 175 transitions, 1861 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:02,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:02,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:39:02,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:03,479 INFO L124 PetriNetUnfolderBase]: 2516/3727 cut-off events. [2024-06-21 16:39:03,480 INFO L125 PetriNetUnfolderBase]: For 144733/144733 co-relation queries the response was YES. [2024-06-21 16:39:03,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27297 conditions, 3727 events. 2516/3727 cut-off events. For 144733/144733 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 17618 event pairs, 620 based on Foata normal form. 6/3732 useless extension candidates. Maximal degree in co-relation 27231. Up to 3569 conditions per place. [2024-06-21 16:39:03,508 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 165 selfloop transitions, 36 changer transitions 0/204 dead transitions. [2024-06-21 16:39:03,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 204 transitions, 2475 flow [2024-06-21 16:39:03,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:39:03,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:39:03,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 16:39:03,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-21 16:39:03,509 INFO L175 Difference]: Start difference. First operand has 137 places, 175 transitions, 1861 flow. Second operand 8 states and 142 transitions. [2024-06-21 16:39:03,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 204 transitions, 2475 flow [2024-06-21 16:39:03,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 204 transitions, 2357 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-21 16:39:03,615 INFO L231 Difference]: Finished difference. Result has 139 places, 178 transitions, 1919 flow [2024-06-21 16:39:03,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1743, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1919, PETRI_PLACES=139, PETRI_TRANSITIONS=178} [2024-06-21 16:39:03,615 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 97 predicate places. [2024-06-21 16:39:03,615 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 178 transitions, 1919 flow [2024-06-21 16:39:03,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:03,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:03,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:39:03,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 16:39:03,616 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:39:03,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:03,617 INFO L85 PathProgramCache]: Analyzing trace with hash 178475560, now seen corresponding path program 1 times [2024-06-21 16:39:03,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:03,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632103474] [2024-06-21 16:39:03,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:03,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:03,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:04,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:39:04,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:04,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632103474] [2024-06-21 16:39:04,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632103474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:04,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:04,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:39:04,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714743183] [2024-06-21 16:39:04,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:04,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:39:04,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:04,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:39:04,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:39:04,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:39:04,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 178 transitions, 1919 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:04,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:04,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:39:04,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:05,085 INFO L124 PetriNetUnfolderBase]: 2518/3731 cut-off events. [2024-06-21 16:39:05,085 INFO L125 PetriNetUnfolderBase]: For 150765/150771 co-relation queries the response was YES. [2024-06-21 16:39:05,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27605 conditions, 3731 events. 2518/3731 cut-off events. For 150765/150771 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 17646 event pairs, 614 based on Foata normal form. 9/3739 useless extension candidates. Maximal degree in co-relation 27538. Up to 3577 conditions per place. [2024-06-21 16:39:05,116 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 165 selfloop transitions, 36 changer transitions 0/204 dead transitions. [2024-06-21 16:39:05,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 204 transitions, 2523 flow [2024-06-21 16:39:05,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:39:05,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:39:05,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-21 16:39:05,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445993031358885 [2024-06-21 16:39:05,118 INFO L175 Difference]: Start difference. First operand has 139 places, 178 transitions, 1919 flow. Second operand 7 states and 128 transitions. [2024-06-21 16:39:05,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 204 transitions, 2523 flow [2024-06-21 16:39:05,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 204 transitions, 2371 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-21 16:39:05,241 INFO L231 Difference]: Finished difference. Result has 140 places, 182 transitions, 1945 flow [2024-06-21 16:39:05,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1771, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1945, PETRI_PLACES=140, PETRI_TRANSITIONS=182} [2024-06-21 16:39:05,242 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 98 predicate places. [2024-06-21 16:39:05,242 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 182 transitions, 1945 flow [2024-06-21 16:39:05,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:05,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:05,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:39:05,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 16:39:05,242 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)] === [2024-06-21 16:39:05,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:05,243 INFO L85 PathProgramCache]: Analyzing trace with hash -732370508, now seen corresponding path program 4 times [2024-06-21 16:39:05,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:05,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738257004] [2024-06-21 16:39:05,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:05,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:05,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:05,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:39:05,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:05,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738257004] [2024-06-21 16:39:05,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738257004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:05,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:05,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:39:05,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628912254] [2024-06-21 16:39:05,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:05,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:39:05,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:05,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:39:05,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:39:06,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:39:06,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 182 transitions, 1945 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:06,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:06,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:39:06,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:06,684 INFO L124 PetriNetUnfolderBase]: 2522/3737 cut-off events. [2024-06-21 16:39:06,685 INFO L125 PetriNetUnfolderBase]: For 147454/147460 co-relation queries the response was YES. [2024-06-21 16:39:06,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27152 conditions, 3737 events. 2522/3737 cut-off events. For 147454/147460 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 17695 event pairs, 612 based on Foata normal form. 12/3748 useless extension candidates. Maximal degree in co-relation 27084. Up to 3595 conditions per place. [2024-06-21 16:39:06,713 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 183 selfloop transitions, 27 changer transitions 0/213 dead transitions. [2024-06-21 16:39:06,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 213 transitions, 2581 flow [2024-06-21 16:39:06,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:39:06,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:39:06,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 16:39:06,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-21 16:39:06,715 INFO L175 Difference]: Start difference. First operand has 140 places, 182 transitions, 1945 flow. Second operand 8 states and 143 transitions. [2024-06-21 16:39:06,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 213 transitions, 2581 flow [2024-06-21 16:39:06,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 213 transitions, 2465 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-21 16:39:06,838 INFO L231 Difference]: Finished difference. Result has 143 places, 186 transitions, 1982 flow [2024-06-21 16:39:06,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1829, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1982, PETRI_PLACES=143, PETRI_TRANSITIONS=186} [2024-06-21 16:39:06,838 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 101 predicate places. [2024-06-21 16:39:06,838 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 186 transitions, 1982 flow [2024-06-21 16:39:06,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:06,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:06,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:39:06,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 16:39:06,839 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)] === [2024-06-21 16:39:06,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:06,839 INFO L85 PathProgramCache]: Analyzing trace with hash -723792684, now seen corresponding path program 5 times [2024-06-21 16:39:06,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:06,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320447288] [2024-06-21 16:39:06,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:06,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:06,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:07,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:39:07,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:07,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320447288] [2024-06-21 16:39:07,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320447288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:07,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:07,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:39:07,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748053819] [2024-06-21 16:39:07,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:07,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:39:07,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:07,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:39:07,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:39:07,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:39:07,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 186 transitions, 1982 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:07,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:07,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:39:07,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:08,332 INFO L124 PetriNetUnfolderBase]: 2525/3741 cut-off events. [2024-06-21 16:39:08,332 INFO L125 PetriNetUnfolderBase]: For 154097/154097 co-relation queries the response was YES. [2024-06-21 16:39:08,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27346 conditions, 3741 events. 2525/3741 cut-off events. For 154097/154097 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 17707 event pairs, 598 based on Foata normal form. 6/3746 useless extension candidates. Maximal degree in co-relation 27277. Up to 3614 conditions per place. [2024-06-21 16:39:08,362 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 184 selfloop transitions, 28 changer transitions 0/215 dead transitions. [2024-06-21 16:39:08,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 215 transitions, 2624 flow [2024-06-21 16:39:08,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:39:08,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:39:08,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 16:39:08,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-21 16:39:08,364 INFO L175 Difference]: Start difference. First operand has 143 places, 186 transitions, 1982 flow. Second operand 8 states and 141 transitions. [2024-06-21 16:39:08,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 215 transitions, 2624 flow [2024-06-21 16:39:08,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 215 transitions, 2513 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-21 16:39:08,503 INFO L231 Difference]: Finished difference. Result has 145 places, 189 transitions, 2031 flow [2024-06-21 16:39:08,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1871, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2031, PETRI_PLACES=145, PETRI_TRANSITIONS=189} [2024-06-21 16:39:08,504 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 103 predicate places. [2024-06-21 16:39:08,504 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 189 transitions, 2031 flow [2024-06-21 16:39:08,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:08,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:08,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:39:08,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 16:39:08,505 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:39:08,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:08,505 INFO L85 PathProgramCache]: Analyzing trace with hash -2004819495, now seen corresponding path program 2 times [2024-06-21 16:39:08,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:08,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260569930] [2024-06-21 16:39:08,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:08,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:08,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:08,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:39:08,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:08,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260569930] [2024-06-21 16:39:08,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260569930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:08,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:08,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:39:08,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692322999] [2024-06-21 16:39:08,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:08,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:39:08,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:08,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:39:08,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:39:08,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:39:08,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 189 transitions, 2031 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 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) [2024-06-21 16:39:08,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:08,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:39:08,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:09,496 INFO L124 PetriNetUnfolderBase]: 2522/3737 cut-off events. [2024-06-21 16:39:09,497 INFO L125 PetriNetUnfolderBase]: For 158948/158948 co-relation queries the response was YES. [2024-06-21 16:39:09,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27583 conditions, 3737 events. 2522/3737 cut-off events. For 158948/158948 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 17671 event pairs, 626 based on Foata normal form. 1/3737 useless extension candidates. Maximal degree in co-relation 27513. Up to 3719 conditions per place. [2024-06-21 16:39:09,527 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 184 selfloop transitions, 11 changer transitions 0/198 dead transitions. [2024-06-21 16:39:09,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 198 transitions, 2443 flow [2024-06-21 16:39:09,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:39:09,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:39:09,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-06-21 16:39:09,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3861788617886179 [2024-06-21 16:39:09,529 INFO L175 Difference]: Start difference. First operand has 145 places, 189 transitions, 2031 flow. Second operand 6 states and 95 transitions. [2024-06-21 16:39:09,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 198 transitions, 2443 flow [2024-06-21 16:39:09,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 198 transitions, 2295 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-21 16:39:09,664 INFO L231 Difference]: Finished difference. Result has 145 places, 189 transitions, 1911 flow [2024-06-21 16:39:09,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1883, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1911, PETRI_PLACES=145, PETRI_TRANSITIONS=189} [2024-06-21 16:39:09,665 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 103 predicate places. [2024-06-21 16:39:09,665 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 189 transitions, 1911 flow [2024-06-21 16:39:09,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 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) [2024-06-21 16:39:09,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:09,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:39:09,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 16:39:09,666 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:39:09,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:09,666 INFO L85 PathProgramCache]: Analyzing trace with hash -394611203, now seen corresponding path program 1 times [2024-06-21 16:39:09,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:09,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136646537] [2024-06-21 16:39:09,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:09,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:09,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:10,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:39:10,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:10,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136646537] [2024-06-21 16:39:10,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136646537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:10,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:10,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:39:10,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209926052] [2024-06-21 16:39:10,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:10,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:39:10,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:10,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:39:10,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:39:10,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:39:10,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 189 transitions, 1911 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 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) [2024-06-21 16:39:10,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:10,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:39:10,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:10,724 INFO L124 PetriNetUnfolderBase]: 2521/3736 cut-off events. [2024-06-21 16:39:10,724 INFO L125 PetriNetUnfolderBase]: For 164384/164384 co-relation queries the response was YES. [2024-06-21 16:39:10,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27364 conditions, 3736 events. 2521/3736 cut-off events. For 164384/164384 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 17655 event pairs, 624 based on Foata normal form. 3/3738 useless extension candidates. Maximal degree in co-relation 27293. Up to 3669 conditions per place. [2024-06-21 16:39:10,757 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 178 selfloop transitions, 24 changer transitions 0/205 dead transitions. [2024-06-21 16:39:10,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 205 transitions, 2458 flow [2024-06-21 16:39:10,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:39:10,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:39:10,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-21 16:39:10,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-21 16:39:10,759 INFO L175 Difference]: Start difference. First operand has 145 places, 189 transitions, 1911 flow. Second operand 6 states and 105 transitions. [2024-06-21 16:39:10,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 205 transitions, 2458 flow [2024-06-21 16:39:10,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 205 transitions, 2426 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 16:39:10,896 INFO L231 Difference]: Finished difference. Result has 146 places, 192 transitions, 1983 flow [2024-06-21 16:39:10,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1879, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1983, PETRI_PLACES=146, PETRI_TRANSITIONS=192} [2024-06-21 16:39:10,897 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 104 predicate places. [2024-06-21 16:39:10,897 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 192 transitions, 1983 flow [2024-06-21 16:39:10,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 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) [2024-06-21 16:39:10,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:10,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:39:10,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 16:39:10,897 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)] === [2024-06-21 16:39:10,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:10,898 INFO L85 PathProgramCache]: Analyzing trace with hash -2005851423, now seen corresponding path program 2 times [2024-06-21 16:39:10,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:10,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643160816] [2024-06-21 16:39:10,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:10,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:10,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:11,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:39:11,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:11,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643160816] [2024-06-21 16:39:11,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643160816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:11,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:11,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:39:11,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235045637] [2024-06-21 16:39:11,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:11,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:39:11,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:11,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:39:11,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:39:11,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:39:11,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 192 transitions, 1983 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 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) [2024-06-21 16:39:11,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:11,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:39:11,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:12,014 INFO L124 PetriNetUnfolderBase]: 2486/3684 cut-off events. [2024-06-21 16:39:12,014 INFO L125 PetriNetUnfolderBase]: For 170586/170588 co-relation queries the response was YES. [2024-06-21 16:39:12,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27307 conditions, 3684 events. 2486/3684 cut-off events. For 170586/170588 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 17346 event pairs, 634 based on Foata normal form. 1/3684 useless extension candidates. Maximal degree in co-relation 27235. Up to 3618 conditions per place. [2024-06-21 16:39:12,044 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 173 selfloop transitions, 25 changer transitions 0/201 dead transitions. [2024-06-21 16:39:12,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 201 transitions, 2401 flow [2024-06-21 16:39:12,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:39:12,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:39:12,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-21 16:39:12,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 16:39:12,046 INFO L175 Difference]: Start difference. First operand has 146 places, 192 transitions, 1983 flow. Second operand 6 states and 102 transitions. [2024-06-21 16:39:12,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 201 transitions, 2401 flow [2024-06-21 16:39:12,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 201 transitions, 2341 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 16:39:12,174 INFO L231 Difference]: Finished difference. Result has 148 places, 192 transitions, 1979 flow [2024-06-21 16:39:12,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1923, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1979, PETRI_PLACES=148, PETRI_TRANSITIONS=192} [2024-06-21 16:39:12,175 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 106 predicate places. [2024-06-21 16:39:12,175 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 192 transitions, 1979 flow [2024-06-21 16:39:12,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 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) [2024-06-21 16:39:12,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:12,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:39:12,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 16:39:12,176 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:39:12,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:12,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1209614158, now seen corresponding path program 1 times [2024-06-21 16:39:12,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:12,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729526435] [2024-06-21 16:39:12,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:12,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:12,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:12,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:39:12,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:12,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729526435] [2024-06-21 16:39:12,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729526435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:12,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:12,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:39:12,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850223403] [2024-06-21 16:39:12,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:12,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:39:12,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:12,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:39:12,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:39:12,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:39:12,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 192 transitions, 1979 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:12,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:12,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:39:12,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:13,764 INFO L124 PetriNetUnfolderBase]: 2735/4087 cut-off events. [2024-06-21 16:39:13,764 INFO L125 PetriNetUnfolderBase]: For 213074/213076 co-relation queries the response was YES. [2024-06-21 16:39:13,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31154 conditions, 4087 events. 2735/4087 cut-off events. For 213074/213076 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 20086 event pairs, 401 based on Foata normal form. 24/4110 useless extension candidates. Maximal degree in co-relation 31081. Up to 2561 conditions per place. [2024-06-21 16:39:13,800 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 170 selfloop transitions, 86 changer transitions 0/259 dead transitions. [2024-06-21 16:39:13,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 259 transitions, 3421 flow [2024-06-21 16:39:13,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:39:13,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:39:13,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-21 16:39:13,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5013550135501355 [2024-06-21 16:39:13,802 INFO L175 Difference]: Start difference. First operand has 148 places, 192 transitions, 1979 flow. Second operand 9 states and 185 transitions. [2024-06-21 16:39:13,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 259 transitions, 3421 flow [2024-06-21 16:39:13,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 259 transitions, 3349 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 16:39:13,985 INFO L231 Difference]: Finished difference. Result has 154 places, 201 transitions, 2361 flow [2024-06-21 16:39:13,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1907, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2361, PETRI_PLACES=154, PETRI_TRANSITIONS=201} [2024-06-21 16:39:13,985 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 112 predicate places. [2024-06-21 16:39:13,986 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 201 transitions, 2361 flow [2024-06-21 16:39:13,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:13,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:13,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:39:13,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 16:39:13,986 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)] === [2024-06-21 16:39:13,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:13,987 INFO L85 PathProgramCache]: Analyzing trace with hash 57349182, now seen corresponding path program 2 times [2024-06-21 16:39:13,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:13,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425226532] [2024-06-21 16:39:13,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:13,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:13,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:14,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:39:14,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:14,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425226532] [2024-06-21 16:39:14,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425226532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:14,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:14,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:39:14,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771160191] [2024-06-21 16:39:14,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:14,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:39:14,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:14,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:39:14,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:39:14,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:39:14,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 201 transitions, 2361 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:14,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:14,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:39:14,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:15,793 INFO L124 PetriNetUnfolderBase]: 2927/4407 cut-off events. [2024-06-21 16:39:15,793 INFO L125 PetriNetUnfolderBase]: For 264417/264419 co-relation queries the response was YES. [2024-06-21 16:39:15,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35210 conditions, 4407 events. 2927/4407 cut-off events. For 264417/264419 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 22461 event pairs, 649 based on Foata normal form. 50/4456 useless extension candidates. Maximal degree in co-relation 35134. Up to 3365 conditions per place. [2024-06-21 16:39:15,834 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 171 selfloop transitions, 86 changer transitions 0/260 dead transitions. [2024-06-21 16:39:15,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 260 transitions, 3442 flow [2024-06-21 16:39:15,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:39:15,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:39:15,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 217 transitions. [2024-06-21 16:39:15,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4811529933481153 [2024-06-21 16:39:15,835 INFO L175 Difference]: Start difference. First operand has 154 places, 201 transitions, 2361 flow. Second operand 11 states and 217 transitions. [2024-06-21 16:39:15,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 260 transitions, 3442 flow [2024-06-21 16:39:16,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 260 transitions, 3289 flow, removed 45 selfloop flow, removed 3 redundant places. [2024-06-21 16:39:16,061 INFO L231 Difference]: Finished difference. Result has 162 places, 204 transitions, 2502 flow [2024-06-21 16:39:16,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2208, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2502, PETRI_PLACES=162, PETRI_TRANSITIONS=204} [2024-06-21 16:39:16,062 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 120 predicate places. [2024-06-21 16:39:16,062 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 204 transitions, 2502 flow [2024-06-21 16:39:16,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:16,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:16,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:39:16,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 16:39:16,063 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)] === [2024-06-21 16:39:16,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:16,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1211488108, now seen corresponding path program 3 times [2024-06-21 16:39:16,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:16,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573532849] [2024-06-21 16:39:16,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:16,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:16,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:16,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:39:16,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:16,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573532849] [2024-06-21 16:39:16,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573532849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:16,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:16,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:39:16,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790040032] [2024-06-21 16:39:16,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:16,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:39:16,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:16,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:39:16,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:39:16,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:39:16,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 204 transitions, 2502 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:16,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:16,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:39:16,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:17,774 INFO L124 PetriNetUnfolderBase]: 3296/4991 cut-off events. [2024-06-21 16:39:17,774 INFO L125 PetriNetUnfolderBase]: For 275706/275708 co-relation queries the response was YES. [2024-06-21 16:39:17,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40550 conditions, 4991 events. 3296/4991 cut-off events. For 275706/275708 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 26334 event pairs, 725 based on Foata normal form. 24/5014 useless extension candidates. Maximal degree in co-relation 40472. Up to 3722 conditions per place. [2024-06-21 16:39:17,824 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 177 selfloop transitions, 92 changer transitions 0/272 dead transitions. [2024-06-21 16:39:17,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 272 transitions, 3975 flow [2024-06-21 16:39:17,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:39:17,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:39:17,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-21 16:39:17,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4932249322493225 [2024-06-21 16:39:17,825 INFO L175 Difference]: Start difference. First operand has 162 places, 204 transitions, 2502 flow. Second operand 9 states and 182 transitions. [2024-06-21 16:39:17,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 272 transitions, 3975 flow [2024-06-21 16:39:18,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 272 transitions, 3684 flow, removed 56 selfloop flow, removed 9 redundant places. [2024-06-21 16:39:18,159 INFO L231 Difference]: Finished difference. Result has 163 places, 216 transitions, 2715 flow [2024-06-21 16:39:18,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2279, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2715, PETRI_PLACES=163, PETRI_TRANSITIONS=216} [2024-06-21 16:39:18,160 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 121 predicate places. [2024-06-21 16:39:18,160 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 216 transitions, 2715 flow [2024-06-21 16:39:18,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:18,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:18,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:39:18,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 16:39:18,160 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)] === [2024-06-21 16:39:18,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:18,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1109865986, now seen corresponding path program 4 times [2024-06-21 16:39:18,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:18,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661385566] [2024-06-21 16:39:18,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:18,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:18,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:18,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:39:18,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:18,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661385566] [2024-06-21 16:39:18,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661385566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:18,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:18,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:39:18,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414826216] [2024-06-21 16:39:18,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:18,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:39:18,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:18,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:39:18,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:39:19,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:39:19,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 216 transitions, 2715 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:19,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:19,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:39:19,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:20,090 INFO L124 PetriNetUnfolderBase]: 3523/5348 cut-off events. [2024-06-21 16:39:20,091 INFO L125 PetriNetUnfolderBase]: For 300299/300301 co-relation queries the response was YES. [2024-06-21 16:39:20,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43337 conditions, 5348 events. 3523/5348 cut-off events. For 300299/300301 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 28636 event pairs, 888 based on Foata normal form. 26/5373 useless extension candidates. Maximal degree in co-relation 43257. Up to 4144 conditions per place. [2024-06-21 16:39:20,133 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 202 selfloop transitions, 68 changer transitions 0/273 dead transitions. [2024-06-21 16:39:20,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 273 transitions, 3954 flow [2024-06-21 16:39:20,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:39:20,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:39:20,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-21 16:39:20,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48509485094850946 [2024-06-21 16:39:20,134 INFO L175 Difference]: Start difference. First operand has 163 places, 216 transitions, 2715 flow. Second operand 9 states and 179 transitions. [2024-06-21 16:39:20,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 273 transitions, 3954 flow [2024-06-21 16:39:20,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 273 transitions, 3773 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-21 16:39:20,427 INFO L231 Difference]: Finished difference. Result has 169 places, 222 transitions, 2895 flow [2024-06-21 16:39:20,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2534, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2895, PETRI_PLACES=169, PETRI_TRANSITIONS=222} [2024-06-21 16:39:20,427 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 127 predicate places. [2024-06-21 16:39:20,427 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 222 transitions, 2895 flow [2024-06-21 16:39:20,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:20,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:20,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:39:20,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 16:39:20,428 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)] === [2024-06-21 16:39:20,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:20,428 INFO L85 PathProgramCache]: Analyzing trace with hash -2040477405, now seen corresponding path program 1 times [2024-06-21 16:39:20,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:20,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886109060] [2024-06-21 16:39:20,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:20,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:20,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:20,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:39:20,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:20,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886109060] [2024-06-21 16:39:20,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886109060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:20,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:20,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:39:20,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001768643] [2024-06-21 16:39:20,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:20,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:39:20,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:20,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:39:20,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:39:21,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:39:21,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 222 transitions, 2895 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:21,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:21,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:39:21,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:21,870 INFO L124 PetriNetUnfolderBase]: 3543/5376 cut-off events. [2024-06-21 16:39:21,870 INFO L125 PetriNetUnfolderBase]: For 296011/296013 co-relation queries the response was YES. [2024-06-21 16:39:21,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44287 conditions, 5376 events. 3543/5376 cut-off events. For 296011/296013 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 28845 event pairs, 931 based on Foata normal form. 6/5381 useless extension candidates. Maximal degree in co-relation 44204. Up to 4920 conditions per place. [2024-06-21 16:39:21,915 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 188 selfloop transitions, 63 changer transitions 0/254 dead transitions. [2024-06-21 16:39:21,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 254 transitions, 3718 flow [2024-06-21 16:39:21,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:39:21,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:39:21,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-21 16:39:21,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738675958188153 [2024-06-21 16:39:21,917 INFO L175 Difference]: Start difference. First operand has 169 places, 222 transitions, 2895 flow. Second operand 7 states and 136 transitions. [2024-06-21 16:39:21,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 254 transitions, 3718 flow [2024-06-21 16:39:22,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 254 transitions, 3554 flow, removed 47 selfloop flow, removed 4 redundant places. [2024-06-21 16:39:22,206 INFO L231 Difference]: Finished difference. Result has 172 places, 227 transitions, 2959 flow [2024-06-21 16:39:22,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2736, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2959, PETRI_PLACES=172, PETRI_TRANSITIONS=227} [2024-06-21 16:39:22,206 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 130 predicate places. [2024-06-21 16:39:22,207 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 227 transitions, 2959 flow [2024-06-21 16:39:22,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:22,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:22,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:39:22,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 16:39:22,207 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:39:22,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:22,208 INFO L85 PathProgramCache]: Analyzing trace with hash 577238892, now seen corresponding path program 5 times [2024-06-21 16:39:22,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:22,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967030298] [2024-06-21 16:39:22,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:22,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:22,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:22,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:39:22,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:22,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967030298] [2024-06-21 16:39:22,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967030298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:22,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:22,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:39:22,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616786088] [2024-06-21 16:39:22,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:22,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:39:22,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:22,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:39:22,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:39:23,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:39:23,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 227 transitions, 2959 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:23,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:23,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:39:23,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:24,079 INFO L124 PetriNetUnfolderBase]: 3639/5536 cut-off events. [2024-06-21 16:39:24,079 INFO L125 PetriNetUnfolderBase]: For 322981/322983 co-relation queries the response was YES. [2024-06-21 16:39:24,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45492 conditions, 5536 events. 3639/5536 cut-off events. For 322981/322983 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 30041 event pairs, 754 based on Foata normal form. 24/5559 useless extension candidates. Maximal degree in co-relation 45407. Up to 4261 conditions per place. [2024-06-21 16:39:24,130 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 187 selfloop transitions, 99 changer transitions 0/289 dead transitions. [2024-06-21 16:39:24,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 289 transitions, 4460 flow [2024-06-21 16:39:24,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:39:24,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:39:24,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-21 16:39:24,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094850948509485 [2024-06-21 16:39:24,132 INFO L175 Difference]: Start difference. First operand has 172 places, 227 transitions, 2959 flow. Second operand 9 states and 188 transitions. [2024-06-21 16:39:24,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 289 transitions, 4460 flow [2024-06-21 16:39:24,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 289 transitions, 4347 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-21 16:39:24,437 INFO L231 Difference]: Finished difference. Result has 179 places, 233 transitions, 3292 flow [2024-06-21 16:39:24,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2846, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3292, PETRI_PLACES=179, PETRI_TRANSITIONS=233} [2024-06-21 16:39:24,438 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 137 predicate places. [2024-06-21 16:39:24,438 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 233 transitions, 3292 flow [2024-06-21 16:39:24,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:24,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:24,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:39:24,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 16:39:24,440 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:39:24,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:24,442 INFO L85 PathProgramCache]: Analyzing trace with hash 199452252, now seen corresponding path program 6 times [2024-06-21 16:39:24,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:24,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614400958] [2024-06-21 16:39:24,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:24,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:24,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:25,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:39:25,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:25,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614400958] [2024-06-21 16:39:25,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614400958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:25,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:25,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:39:25,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759059947] [2024-06-21 16:39:25,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:25,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:39:25,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:25,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:39:25,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:39:25,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:39:25,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 233 transitions, 3292 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:25,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:25,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:39:25,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:26,404 INFO L124 PetriNetUnfolderBase]: 3799/5792 cut-off events. [2024-06-21 16:39:26,405 INFO L125 PetriNetUnfolderBase]: For 358082/358084 co-relation queries the response was YES. [2024-06-21 16:39:26,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48820 conditions, 5792 events. 3799/5792 cut-off events. For 358082/358084 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 31769 event pairs, 955 based on Foata normal form. 30/5821 useless extension candidates. Maximal degree in co-relation 48732. Up to 4883 conditions per place. [2024-06-21 16:39:26,468 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 186 selfloop transitions, 100 changer transitions 0/289 dead transitions. [2024-06-21 16:39:26,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 289 transitions, 4538 flow [2024-06-21 16:39:26,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:39:26,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:39:26,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-21 16:39:26,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4959349593495935 [2024-06-21 16:39:26,469 INFO L175 Difference]: Start difference. First operand has 179 places, 233 transitions, 3292 flow. Second operand 9 states and 183 transitions. [2024-06-21 16:39:26,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 289 transitions, 4538 flow [2024-06-21 16:39:26,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 289 transitions, 4212 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-21 16:39:26,896 INFO L231 Difference]: Finished difference. Result has 183 places, 239 transitions, 3328 flow [2024-06-21 16:39:26,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2978, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3328, PETRI_PLACES=183, PETRI_TRANSITIONS=239} [2024-06-21 16:39:26,897 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 141 predicate places. [2024-06-21 16:39:26,897 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 239 transitions, 3328 flow [2024-06-21 16:39:26,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:26,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:26,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:39:26,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 16:39:26,897 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:39:26,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:26,898 INFO L85 PathProgramCache]: Analyzing trace with hash 582956904, now seen corresponding path program 1 times [2024-06-21 16:39:26,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:26,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244557246] [2024-06-21 16:39:26,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:26,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:26,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:27,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:39:27,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:27,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244557246] [2024-06-21 16:39:27,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244557246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:27,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:27,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:39:27,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067848957] [2024-06-21 16:39:27,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:27,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:39:27,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:27,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:39:27,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:39:27,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:39:27,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 239 transitions, 3328 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:27,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:27,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:39:27,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:28,818 INFO L124 PetriNetUnfolderBase]: 3827/5836 cut-off events. [2024-06-21 16:39:28,818 INFO L125 PetriNetUnfolderBase]: For 351436/351438 co-relation queries the response was YES. [2024-06-21 16:39:28,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47980 conditions, 5836 events. 3827/5836 cut-off events. For 351436/351438 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 32116 event pairs, 958 based on Foata normal form. 8/5843 useless extension candidates. Maximal degree in co-relation 47892. Up to 5354 conditions per place. [2024-06-21 16:39:28,869 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 209 selfloop transitions, 61 changer transitions 0/273 dead transitions. [2024-06-21 16:39:28,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 273 transitions, 4138 flow [2024-06-21 16:39:28,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:39:28,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:39:28,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 16:39:28,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2024-06-21 16:39:28,872 INFO L175 Difference]: Start difference. First operand has 183 places, 239 transitions, 3328 flow. Second operand 8 states and 150 transitions. [2024-06-21 16:39:28,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 273 transitions, 4138 flow [2024-06-21 16:39:29,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 273 transitions, 3924 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-21 16:39:29,311 INFO L231 Difference]: Finished difference. Result has 186 places, 242 transitions, 3352 flow [2024-06-21 16:39:29,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3114, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3352, PETRI_PLACES=186, PETRI_TRANSITIONS=242} [2024-06-21 16:39:29,313 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 144 predicate places. [2024-06-21 16:39:29,313 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 242 transitions, 3352 flow [2024-06-21 16:39:29,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:29,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:29,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:39:29,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 16:39:29,314 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:39:29,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:29,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1254119588, now seen corresponding path program 2 times [2024-06-21 16:39:29,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:29,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642153658] [2024-06-21 16:39:29,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:29,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:29,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:30,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:39:30,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:30,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642153658] [2024-06-21 16:39:30,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642153658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:30,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:30,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:39:30,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124430536] [2024-06-21 16:39:30,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:30,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:39:30,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:30,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:39:30,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:39:30,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:39:30,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 242 transitions, 3352 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:30,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:30,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:39:30,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:31,391 INFO L124 PetriNetUnfolderBase]: 4283/6516 cut-off events. [2024-06-21 16:39:31,391 INFO L125 PetriNetUnfolderBase]: For 387016/387018 co-relation queries the response was YES. [2024-06-21 16:39:31,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53305 conditions, 6516 events. 4283/6516 cut-off events. For 387016/387018 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 36242 event pairs, 1075 based on Foata normal form. 8/6523 useless extension candidates. Maximal degree in co-relation 53216. Up to 5871 conditions per place. [2024-06-21 16:39:31,460 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 252 selfloop transitions, 74 changer transitions 0/329 dead transitions. [2024-06-21 16:39:31,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 329 transitions, 5380 flow [2024-06-21 16:39:31,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:39:31,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:39:31,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 16:39:31,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-21 16:39:31,462 INFO L175 Difference]: Start difference. First operand has 186 places, 242 transitions, 3352 flow. Second operand 9 states and 159 transitions. [2024-06-21 16:39:31,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 329 transitions, 5380 flow [2024-06-21 16:39:31,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 329 transitions, 5006 flow, removed 96 selfloop flow, removed 6 redundant places. [2024-06-21 16:39:31,931 INFO L231 Difference]: Finished difference. Result has 193 places, 286 transitions, 4173 flow [2024-06-21 16:39:31,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3138, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4173, PETRI_PLACES=193, PETRI_TRANSITIONS=286} [2024-06-21 16:39:31,932 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 151 predicate places. [2024-06-21 16:39:31,932 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 286 transitions, 4173 flow [2024-06-21 16:39:31,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:31,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:31,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:39:31,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 16:39:31,933 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:39:31,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:31,933 INFO L85 PathProgramCache]: Analyzing trace with hash 582749142, now seen corresponding path program 7 times [2024-06-21 16:39:31,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:31,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237353287] [2024-06-21 16:39:31,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:31,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:31,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:32,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:39:32,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:32,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237353287] [2024-06-21 16:39:32,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237353287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:32,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:32,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:39:32,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749720826] [2024-06-21 16:39:32,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:32,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:39:32,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:32,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:39:32,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:39:32,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:39:32,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 286 transitions, 4173 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:32,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:32,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:39:32,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:34,175 INFO L124 PetriNetUnfolderBase]: 4475/6834 cut-off events. [2024-06-21 16:39:34,176 INFO L125 PetriNetUnfolderBase]: For 456528/456530 co-relation queries the response was YES. [2024-06-21 16:39:34,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56645 conditions, 6834 events. 4475/6834 cut-off events. For 456528/456530 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 38712 event pairs, 1053 based on Foata normal form. 50/6883 useless extension candidates. Maximal degree in co-relation 56551. Up to 5736 conditions per place. [2024-06-21 16:39:34,242 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 226 selfloop transitions, 99 changer transitions 0/328 dead transitions. [2024-06-21 16:39:34,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 328 transitions, 5170 flow [2024-06-21 16:39:34,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:39:34,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:39:34,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 16:39:34,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-21 16:39:34,244 INFO L175 Difference]: Start difference. First operand has 193 places, 286 transitions, 4173 flow. Second operand 9 states and 171 transitions. [2024-06-21 16:39:34,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 328 transitions, 5170 flow [2024-06-21 16:39:34,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 328 transitions, 5042 flow, removed 63 selfloop flow, removed 1 redundant places. [2024-06-21 16:39:34,899 INFO L231 Difference]: Finished difference. Result has 201 places, 289 transitions, 4395 flow [2024-06-21 16:39:34,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4045, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4395, PETRI_PLACES=201, PETRI_TRANSITIONS=289} [2024-06-21 16:39:34,899 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 159 predicate places. [2024-06-21 16:39:34,899 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 289 transitions, 4395 flow [2024-06-21 16:39:34,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:34,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:34,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:39:34,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 16:39:34,900 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:39:34,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:34,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1248547958, now seen corresponding path program 3 times [2024-06-21 16:39:34,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:34,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289132590] [2024-06-21 16:39:34,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:34,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:34,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:35,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:39:35,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:35,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289132590] [2024-06-21 16:39:35,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289132590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:35,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:35,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:39:35,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557097111] [2024-06-21 16:39:35,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:35,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:39:35,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:35,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:39:35,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:39:35,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:39:35,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 289 transitions, 4395 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:35,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:35,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:39:35,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:37,157 INFO L124 PetriNetUnfolderBase]: 4493/6861 cut-off events. [2024-06-21 16:39:37,158 INFO L125 PetriNetUnfolderBase]: For 440147/440155 co-relation queries the response was YES. [2024-06-21 16:39:37,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57646 conditions, 6861 events. 4493/6861 cut-off events. For 440147/440155 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 38978 event pairs, 1041 based on Foata normal form. 20/6880 useless extension candidates. Maximal degree in co-relation 57549. Up to 6112 conditions per place. [2024-06-21 16:39:37,233 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 229 selfloop transitions, 94 changer transitions 0/326 dead transitions. [2024-06-21 16:39:37,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 326 transitions, 5437 flow [2024-06-21 16:39:37,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:39:37,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:39:37,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 16:39:37,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725609756097561 [2024-06-21 16:39:37,235 INFO L175 Difference]: Start difference. First operand has 201 places, 289 transitions, 4395 flow. Second operand 8 states and 155 transitions. [2024-06-21 16:39:37,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 326 transitions, 5437 flow [2024-06-21 16:39:37,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 326 transitions, 5110 flow, removed 70 selfloop flow, removed 7 redundant places. [2024-06-21 16:39:37,928 INFO L231 Difference]: Finished difference. Result has 202 places, 292 transitions, 4392 flow [2024-06-21 16:39:37,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4068, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4392, PETRI_PLACES=202, PETRI_TRANSITIONS=292} [2024-06-21 16:39:37,929 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 160 predicate places. [2024-06-21 16:39:37,929 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 292 transitions, 4392 flow [2024-06-21 16:39:37,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:37,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:37,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:39:37,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 16:39:37,930 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:39:37,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:37,930 INFO L85 PathProgramCache]: Analyzing trace with hash 577386762, now seen corresponding path program 8 times [2024-06-21 16:39:37,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:37,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742700881] [2024-06-21 16:39:37,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:37,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:37,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:38,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:39:38,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:38,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742700881] [2024-06-21 16:39:38,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742700881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:38,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:38,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:39:38,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90663286] [2024-06-21 16:39:38,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:38,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:39:38,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:38,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:39:38,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:39:38,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:39:38,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 292 transitions, 4392 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:38,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:38,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:39:38,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:40,271 INFO L124 PetriNetUnfolderBase]: 4685/7181 cut-off events. [2024-06-21 16:39:40,271 INFO L125 PetriNetUnfolderBase]: For 500484/500492 co-relation queries the response was YES. [2024-06-21 16:39:40,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59681 conditions, 7181 events. 4685/7181 cut-off events. For 500484/500492 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 41415 event pairs, 1082 based on Foata normal form. 56/7236 useless extension candidates. Maximal degree in co-relation 59583. Up to 6086 conditions per place. [2024-06-21 16:39:40,360 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 236 selfloop transitions, 99 changer transitions 0/338 dead transitions. [2024-06-21 16:39:40,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 338 transitions, 5529 flow [2024-06-21 16:39:40,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:39:40,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:39:40,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-21 16:39:40,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47696476964769646 [2024-06-21 16:39:40,366 INFO L175 Difference]: Start difference. First operand has 202 places, 292 transitions, 4392 flow. Second operand 9 states and 176 transitions. [2024-06-21 16:39:40,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 338 transitions, 5529 flow [2024-06-21 16:39:41,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 338 transitions, 5221 flow, removed 64 selfloop flow, removed 6 redundant places. [2024-06-21 16:39:41,014 INFO L231 Difference]: Finished difference. Result has 205 places, 295 transitions, 4444 flow [2024-06-21 16:39:41,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4084, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4444, PETRI_PLACES=205, PETRI_TRANSITIONS=295} [2024-06-21 16:39:41,014 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 163 predicate places. [2024-06-21 16:39:41,014 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 295 transitions, 4444 flow [2024-06-21 16:39:41,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:41,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:41,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:39:41,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 16:39:41,015 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)] === [2024-06-21 16:39:41,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:41,015 INFO L85 PathProgramCache]: Analyzing trace with hash -190001003, now seen corresponding path program 1 times [2024-06-21 16:39:41,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:41,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429985235] [2024-06-21 16:39:41,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:41,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:41,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:41,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:39:41,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:41,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429985235] [2024-06-21 16:39:41,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429985235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:41,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:41,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:39:41,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814752400] [2024-06-21 16:39:41,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:41,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:39:41,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:41,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:39:41,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:39:41,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:39:41,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 295 transitions, 4444 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:41,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:41,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:39:41,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:42,848 INFO L124 PetriNetUnfolderBase]: 4716/7220 cut-off events. [2024-06-21 16:39:42,849 INFO L125 PetriNetUnfolderBase]: For 475622/475628 co-relation queries the response was YES. [2024-06-21 16:39:42,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60391 conditions, 7220 events. 4716/7220 cut-off events. For 475622/475628 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 41558 event pairs, 1196 based on Foata normal form. 9/7228 useless extension candidates. Maximal degree in co-relation 60292. Up to 7144 conditions per place. [2024-06-21 16:39:42,932 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 296 selfloop transitions, 25 changer transitions 0/324 dead transitions. [2024-06-21 16:39:42,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 324 transitions, 5342 flow [2024-06-21 16:39:42,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:39:42,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:39:42,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 16:39:42,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-21 16:39:42,934 INFO L175 Difference]: Start difference. First operand has 205 places, 295 transitions, 4444 flow. Second operand 7 states and 122 transitions. [2024-06-21 16:39:42,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 324 transitions, 5342 flow [2024-06-21 16:39:43,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 324 transitions, 5047 flow, removed 48 selfloop flow, removed 8 redundant places. [2024-06-21 16:39:43,855 INFO L231 Difference]: Finished difference. Result has 205 places, 304 transitions, 4337 flow [2024-06-21 16:39:43,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4149, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4337, PETRI_PLACES=205, PETRI_TRANSITIONS=304} [2024-06-21 16:39:43,856 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 163 predicate places. [2024-06-21 16:39:43,856 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 304 transitions, 4337 flow [2024-06-21 16:39:43,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:43,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:43,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:39:43,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 16:39:43,857 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)] === [2024-06-21 16:39:43,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:43,857 INFO L85 PathProgramCache]: Analyzing trace with hash -190001375, now seen corresponding path program 2 times [2024-06-21 16:39:43,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:43,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415819690] [2024-06-21 16:39:43,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:43,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:43,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:44,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:39:44,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:44,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415819690] [2024-06-21 16:39:44,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415819690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:44,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:44,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:39:44,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805860105] [2024-06-21 16:39:44,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:44,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:39:44,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:44,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:39:44,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:39:44,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:39:44,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 304 transitions, 4337 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:44,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:44,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:39:44,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:45,622 INFO L124 PetriNetUnfolderBase]: 4776/7312 cut-off events. [2024-06-21 16:39:45,622 INFO L125 PetriNetUnfolderBase]: For 472755/472757 co-relation queries the response was YES. [2024-06-21 16:39:45,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59958 conditions, 7312 events. 4776/7312 cut-off events. For 472755/472757 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 42159 event pairs, 1123 based on Foata normal form. 10/7321 useless extension candidates. Maximal degree in co-relation 59858. Up to 6571 conditions per place. [2024-06-21 16:39:45,709 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 236 selfloop transitions, 98 changer transitions 0/337 dead transitions. [2024-06-21 16:39:45,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 337 transitions, 5520 flow [2024-06-21 16:39:45,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:39:45,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:39:45,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-21 16:39:45,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2024-06-21 16:39:45,710 INFO L175 Difference]: Start difference. First operand has 205 places, 304 transitions, 4337 flow. Second operand 7 states and 130 transitions. [2024-06-21 16:39:45,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 337 transitions, 5520 flow [2024-06-21 16:39:46,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 337 transitions, 5448 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-21 16:39:46,443 INFO L231 Difference]: Finished difference. Result has 210 places, 317 transitions, 4788 flow [2024-06-21 16:39:46,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4265, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4788, PETRI_PLACES=210, PETRI_TRANSITIONS=317} [2024-06-21 16:39:46,444 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 168 predicate places. [2024-06-21 16:39:46,444 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 317 transitions, 4788 flow [2024-06-21 16:39:46,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:46,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:46,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:39:46,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 16:39:46,445 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:39:46,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:46,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1826480730, now seen corresponding path program 4 times [2024-06-21 16:39:46,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:46,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511482774] [2024-06-21 16:39:46,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:46,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:46,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:47,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:39:47,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:47,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511482774] [2024-06-21 16:39:47,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511482774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:47,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:47,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:39:47,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812648061] [2024-06-21 16:39:47,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:47,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:39:47,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:47,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:39:47,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:39:47,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:39:47,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 317 transitions, 4788 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:47,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:47,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:39:47,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:48,690 INFO L124 PetriNetUnfolderBase]: 4801/7350 cut-off events. [2024-06-21 16:39:48,690 INFO L125 PetriNetUnfolderBase]: For 489691/489695 co-relation queries the response was YES. [2024-06-21 16:39:48,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61316 conditions, 7350 events. 4801/7350 cut-off events. For 489691/489695 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 42421 event pairs, 1303 based on Foata normal form. 10/7359 useless extension candidates. Maximal degree in co-relation 61213. Up to 7216 conditions per place. [2024-06-21 16:39:48,779 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 312 selfloop transitions, 30 changer transitions 0/345 dead transitions. [2024-06-21 16:39:48,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 345 transitions, 5666 flow [2024-06-21 16:39:48,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:39:48,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:39:48,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 16:39:48,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-21 16:39:48,781 INFO L175 Difference]: Start difference. First operand has 210 places, 317 transitions, 4788 flow. Second operand 8 states and 141 transitions. [2024-06-21 16:39:48,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 345 transitions, 5666 flow [2024-06-21 16:39:49,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 345 transitions, 5456 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-21 16:39:49,507 INFO L231 Difference]: Finished difference. Result has 214 places, 320 transitions, 4780 flow [2024-06-21 16:39:49,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4578, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4780, PETRI_PLACES=214, PETRI_TRANSITIONS=320} [2024-06-21 16:39:49,507 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 172 predicate places. [2024-06-21 16:39:49,508 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 320 transitions, 4780 flow [2024-06-21 16:39:49,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:49,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:49,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:39:49,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 16:39:49,508 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:39:49,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:49,509 INFO L85 PathProgramCache]: Analyzing trace with hash -971939855, now seen corresponding path program 1 times [2024-06-21 16:39:49,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:49,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718711149] [2024-06-21 16:39:49,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:49,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:49,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:50,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:39:50,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:50,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718711149] [2024-06-21 16:39:50,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718711149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:50,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:50,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:39:50,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263684425] [2024-06-21 16:39:50,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:50,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:39:50,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:50,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:39:50,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:39:50,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:39:50,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 320 transitions, 4780 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:50,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:50,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:39:50,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:51,840 INFO L124 PetriNetUnfolderBase]: 4801/7350 cut-off events. [2024-06-21 16:39:51,840 INFO L125 PetriNetUnfolderBase]: For 500018/500022 co-relation queries the response was YES. [2024-06-21 16:39:51,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61123 conditions, 7350 events. 4801/7350 cut-off events. For 500018/500022 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 42409 event pairs, 1313 based on Foata normal form. 7/7356 useless extension candidates. Maximal degree in co-relation 61019. Up to 7156 conditions per place. [2024-06-21 16:39:52,052 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 298 selfloop transitions, 48 changer transitions 0/349 dead transitions. [2024-06-21 16:39:52,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 349 transitions, 5661 flow [2024-06-21 16:39:52,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:39:52,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:39:52,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 16:39:52,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 16:39:52,053 INFO L175 Difference]: Start difference. First operand has 214 places, 320 transitions, 4780 flow. Second operand 8 states and 144 transitions. [2024-06-21 16:39:52,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 349 transitions, 5661 flow [2024-06-21 16:39:52,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 349 transitions, 5483 flow, removed 61 selfloop flow, removed 6 redundant places. [2024-06-21 16:39:52,702 INFO L231 Difference]: Finished difference. Result has 216 places, 324 transitions, 4841 flow [2024-06-21 16:39:52,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4602, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4841, PETRI_PLACES=216, PETRI_TRANSITIONS=324} [2024-06-21 16:39:52,703 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 174 predicate places. [2024-06-21 16:39:52,703 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 324 transitions, 4841 flow [2024-06-21 16:39:52,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:52,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:52,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:39:52,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 16:39:52,703 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:39:52,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:52,704 INFO L85 PathProgramCache]: Analyzing trace with hash -2112282370, now seen corresponding path program 5 times [2024-06-21 16:39:52,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:52,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842341319] [2024-06-21 16:39:52,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:52,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:52,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:53,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:39:53,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:53,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842341319] [2024-06-21 16:39:53,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842341319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:53,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:53,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:39:53,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514415742] [2024-06-21 16:39:53,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:53,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:39:53,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:53,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:39:53,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:39:53,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:39:53,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 324 transitions, 4841 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:53,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:53,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:39:53,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:54,956 INFO L124 PetriNetUnfolderBase]: 4826/7389 cut-off events. [2024-06-21 16:39:54,956 INFO L125 PetriNetUnfolderBase]: For 521568/521572 co-relation queries the response was YES. [2024-06-21 16:39:55,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61747 conditions, 7389 events. 4826/7389 cut-off events. For 521568/521572 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 42752 event pairs, 1319 based on Foata normal form. 10/7398 useless extension candidates. Maximal degree in co-relation 61642. Up to 7200 conditions per place. [2024-06-21 16:39:55,033 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 314 selfloop transitions, 35 changer transitions 0/352 dead transitions. [2024-06-21 16:39:55,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 352 transitions, 5739 flow [2024-06-21 16:39:55,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:39:55,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:39:55,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 16:39:55,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-21 16:39:55,035 INFO L175 Difference]: Start difference. First operand has 216 places, 324 transitions, 4841 flow. Second operand 8 states and 142 transitions. [2024-06-21 16:39:55,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 352 transitions, 5739 flow [2024-06-21 16:39:55,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 352 transitions, 5563 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-21 16:39:55,830 INFO L231 Difference]: Finished difference. Result has 218 places, 327 transitions, 4885 flow [2024-06-21 16:39:55,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4665, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4885, PETRI_PLACES=218, PETRI_TRANSITIONS=327} [2024-06-21 16:39:55,831 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 176 predicate places. [2024-06-21 16:39:55,831 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 327 transitions, 4885 flow [2024-06-21 16:39:55,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:55,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:55,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:39:55,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 16:39:55,831 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:39:55,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:55,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1228647910, now seen corresponding path program 9 times [2024-06-21 16:39:55,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:55,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66569055] [2024-06-21 16:39:55,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:55,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:55,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:56,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:39:56,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:56,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66569055] [2024-06-21 16:39:56,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66569055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:56,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:56,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:39:56,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484787494] [2024-06-21 16:39:56,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:56,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:39:56,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:56,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:39:56,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:39:56,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:39:56,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 327 transitions, 4885 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:56,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:56,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:39:56,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:58,149 INFO L124 PetriNetUnfolderBase]: 4826/7389 cut-off events. [2024-06-21 16:39:58,150 INFO L125 PetriNetUnfolderBase]: For 549529/549533 co-relation queries the response was YES. [2024-06-21 16:39:58,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61148 conditions, 7389 events. 4826/7389 cut-off events. For 549529/549533 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 42636 event pairs, 1290 based on Foata normal form. 34/7422 useless extension candidates. Maximal degree in co-relation 61042. Up to 7019 conditions per place. [2024-06-21 16:39:58,228 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 310 selfloop transitions, 50 changer transitions 0/363 dead transitions. [2024-06-21 16:39:58,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 363 transitions, 5830 flow [2024-06-21 16:39:58,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:39:58,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:39:58,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 16:39:58,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-21 16:39:58,229 INFO L175 Difference]: Start difference. First operand has 218 places, 327 transitions, 4885 flow. Second operand 9 states and 163 transitions. [2024-06-21 16:39:58,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 363 transitions, 5830 flow [2024-06-21 16:39:59,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 363 transitions, 5634 flow, removed 65 selfloop flow, removed 6 redundant places. [2024-06-21 16:39:59,159 INFO L231 Difference]: Finished difference. Result has 221 places, 329 transitions, 4918 flow [2024-06-21 16:39:59,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4689, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4918, PETRI_PLACES=221, PETRI_TRANSITIONS=329} [2024-06-21 16:39:59,160 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 179 predicate places. [2024-06-21 16:39:59,160 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 329 transitions, 4918 flow [2024-06-21 16:39:59,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:59,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:59,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:39:59,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 16:39:59,161 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:39:59,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:59,161 INFO L85 PathProgramCache]: Analyzing trace with hash -971939638, now seen corresponding path program 6 times [2024-06-21 16:39:59,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:59,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491415181] [2024-06-21 16:39:59,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:59,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:59,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:40:00,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:40:00,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:40:00,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491415181] [2024-06-21 16:40:00,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491415181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:40:00,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:40:00,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:40:00,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384877119] [2024-06-21 16:40:00,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:40:00,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:40:00,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:40:00,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:40:00,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:40:00,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:40:00,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 329 transitions, 4918 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:40:00,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:40:00,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:40:00,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:40:01,569 INFO L124 PetriNetUnfolderBase]: 4851/7428 cut-off events. [2024-06-21 16:40:01,570 INFO L125 PetriNetUnfolderBase]: For 538098/538102 co-relation queries the response was YES. [2024-06-21 16:40:01,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61765 conditions, 7428 events. 4851/7428 cut-off events. For 538098/538102 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 42940 event pairs, 1295 based on Foata normal form. 10/7437 useless extension candidates. Maximal degree in co-relation 61658. Up to 7229 conditions per place. [2024-06-21 16:40:01,659 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 308 selfloop transitions, 46 changer transitions 0/357 dead transitions. [2024-06-21 16:40:01,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 357 transitions, 5836 flow [2024-06-21 16:40:01,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:40:01,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:40:01,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 16:40:01,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-21 16:40:01,660 INFO L175 Difference]: Start difference. First operand has 221 places, 329 transitions, 4918 flow. Second operand 8 states and 143 transitions. [2024-06-21 16:40:01,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 357 transitions, 5836 flow [2024-06-21 16:40:02,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 357 transitions, 5652 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-21 16:40:02,640 INFO L231 Difference]: Finished difference. Result has 222 places, 332 transitions, 4988 flow [2024-06-21 16:40:02,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4734, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4988, PETRI_PLACES=222, PETRI_TRANSITIONS=332} [2024-06-21 16:40:02,641 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 180 predicate places. [2024-06-21 16:40:02,641 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 332 transitions, 4988 flow [2024-06-21 16:40:02,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:40:02,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:40:02,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:40:02,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 16:40:02,642 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:40:02,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:40:02,642 INFO L85 PathProgramCache]: Analyzing trace with hash -962735428, now seen corresponding path program 7 times [2024-06-21 16:40:02,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:40:02,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462034633] [2024-06-21 16:40:02,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:40:02,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:40:02,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:40:03,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:40:03,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:40:03,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462034633] [2024-06-21 16:40:03,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462034633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:40:03,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:40:03,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:40:03,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083026354] [2024-06-21 16:40:03,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:40:03,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:40:03,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:40:03,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:40:03,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:40:03,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:40:03,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 332 transitions, 4988 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:40:03,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:40:03,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:40:03,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:40:04,828 INFO L124 PetriNetUnfolderBase]: 4876/7467 cut-off events. [2024-06-21 16:40:04,829 INFO L125 PetriNetUnfolderBase]: For 543108/543112 co-relation queries the response was YES. [2024-06-21 16:40:04,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61850 conditions, 7467 events. 4876/7467 cut-off events. For 543108/543112 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 43168 event pairs, 1300 based on Foata normal form. 10/7476 useless extension candidates. Maximal degree in co-relation 61742. Up to 7309 conditions per place. [2024-06-21 16:40:04,913 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 324 selfloop transitions, 33 changer transitions 0/360 dead transitions. [2024-06-21 16:40:04,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 360 transitions, 5914 flow [2024-06-21 16:40:04,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:40:04,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:40:04,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 16:40:04,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-21 16:40:04,915 INFO L175 Difference]: Start difference. First operand has 222 places, 332 transitions, 4988 flow. Second operand 8 states and 141 transitions. [2024-06-21 16:40:04,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 360 transitions, 5914 flow [2024-06-21 16:40:05,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 360 transitions, 5680 flow, removed 75 selfloop flow, removed 6 redundant places. [2024-06-21 16:40:05,805 INFO L231 Difference]: Finished difference. Result has 224 places, 335 transitions, 4984 flow [2024-06-21 16:40:05,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4760, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4984, PETRI_PLACES=224, PETRI_TRANSITIONS=335} [2024-06-21 16:40:05,806 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 182 predicate places. [2024-06-21 16:40:05,806 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 335 transitions, 4984 flow [2024-06-21 16:40:05,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:40:05,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:40:05,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:40:05,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 16:40:05,807 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:40:05,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:40:05,807 INFO L85 PathProgramCache]: Analyzing trace with hash -971932198, now seen corresponding path program 8 times [2024-06-21 16:40:05,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:40:05,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921581014] [2024-06-21 16:40:05,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:40:05,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:40:05,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:40:06,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:40:06,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:40:06,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921581014] [2024-06-21 16:40:06,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921581014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:40:06,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:40:06,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:40:06,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919385578] [2024-06-21 16:40:06,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:40:06,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:40:06,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:40:06,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:40:06,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:40:06,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:40:06,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 335 transitions, 4984 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:40:06,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:40:06,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:40:06,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:40:08,206 INFO L124 PetriNetUnfolderBase]: 4901/7506 cut-off events. [2024-06-21 16:40:08,207 INFO L125 PetriNetUnfolderBase]: For 544037/544041 co-relation queries the response was YES. [2024-06-21 16:40:08,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61913 conditions, 7506 events. 4901/7506 cut-off events. For 544037/544041 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 43470 event pairs, 1323 based on Foata normal form. 10/7515 useless extension candidates. Maximal degree in co-relation 61804. Up to 7197 conditions per place. [2024-06-21 16:40:08,292 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 304 selfloop transitions, 56 changer transitions 0/363 dead transitions. [2024-06-21 16:40:08,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 363 transitions, 5918 flow [2024-06-21 16:40:08,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:40:08,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:40:08,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 16:40:08,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 16:40:08,293 INFO L175 Difference]: Start difference. First operand has 224 places, 335 transitions, 4984 flow. Second operand 8 states and 144 transitions. [2024-06-21 16:40:08,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 363 transitions, 5918 flow [2024-06-21 16:40:09,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 363 transitions, 5718 flow, removed 69 selfloop flow, removed 6 redundant places. [2024-06-21 16:40:09,361 INFO L231 Difference]: Finished difference. Result has 226 places, 338 transitions, 5064 flow [2024-06-21 16:40:09,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4784, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5064, PETRI_PLACES=226, PETRI_TRANSITIONS=338} [2024-06-21 16:40:09,361 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 184 predicate places. [2024-06-21 16:40:09,361 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 338 transitions, 5064 flow [2024-06-21 16:40:09,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:40:09,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:40:09,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:40:09,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 16:40:09,362 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)] === [2024-06-21 16:40:09,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:40:09,365 INFO L85 PathProgramCache]: Analyzing trace with hash -2051619403, now seen corresponding path program 2 times [2024-06-21 16:40:09,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:40:09,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275830566] [2024-06-21 16:40:09,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:40:09,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:40:09,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:40:09,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:40:09,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:40:09,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275830566] [2024-06-21 16:40:09,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275830566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:40:09,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:40:09,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:40:09,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549978137] [2024-06-21 16:40:09,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:40:09,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:40:09,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:40:09,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:40:09,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:40:09,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:40:09,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 338 transitions, 5064 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:40:09,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:40:09,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:40:09,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:40:11,446 INFO L124 PetriNetUnfolderBase]: 4916/7526 cut-off events. [2024-06-21 16:40:11,447 INFO L125 PetriNetUnfolderBase]: For 553764/553764 co-relation queries the response was YES. [2024-06-21 16:40:11,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62372 conditions, 7526 events. 4916/7526 cut-off events. For 553764/553764 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 43587 event pairs, 1338 based on Foata normal form. 3/7528 useless extension candidates. Maximal degree in co-relation 62262. Up to 7492 conditions per place. [2024-06-21 16:40:11,531 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 334 selfloop transitions, 15 changer transitions 0/352 dead transitions. [2024-06-21 16:40:11,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 352 transitions, 5834 flow [2024-06-21 16:40:11,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:40:11,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:40:11,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-21 16:40:11,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3797909407665505 [2024-06-21 16:40:11,533 INFO L175 Difference]: Start difference. First operand has 226 places, 338 transitions, 5064 flow. Second operand 7 states and 109 transitions. [2024-06-21 16:40:11,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 352 transitions, 5834 flow [2024-06-21 16:40:12,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 352 transitions, 5582 flow, removed 74 selfloop flow, removed 6 redundant places. [2024-06-21 16:40:12,633 INFO L231 Difference]: Finished difference. Result has 227 places, 341 transitions, 4898 flow [2024-06-21 16:40:12,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4812, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4898, PETRI_PLACES=227, PETRI_TRANSITIONS=341} [2024-06-21 16:40:12,634 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 185 predicate places. [2024-06-21 16:40:12,634 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 341 transitions, 4898 flow [2024-06-21 16:40:12,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:40:12,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:40:12,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:40:12,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 16:40:12,635 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)] === [2024-06-21 16:40:12,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:40:12,635 INFO L85 PathProgramCache]: Analyzing trace with hash 885356313, now seen corresponding path program 3 times [2024-06-21 16:40:12,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:40:12,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736736939] [2024-06-21 16:40:12,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:40:12,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:40:12,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:40:13,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:40:13,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:40:13,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736736939] [2024-06-21 16:40:13,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736736939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:40:13,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:40:13,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:40:13,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103544399] [2024-06-21 16:40:13,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:40:13,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:40:13,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:40:13,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:40:13,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:40:13,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:40:13,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 341 transitions, 4898 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:40:13,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:40:13,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:40:13,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:40:14,701 INFO L124 PetriNetUnfolderBase]: 4907/7514 cut-off events. [2024-06-21 16:40:14,702 INFO L125 PetriNetUnfolderBase]: For 541426/541426 co-relation queries the response was YES. [2024-06-21 16:40:14,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61396 conditions, 7514 events. 4907/7514 cut-off events. For 541426/541426 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 43523 event pairs, 1336 based on Foata normal form. 3/7516 useless extension candidates. Maximal degree in co-relation 61285. Up to 7468 conditions per place. [2024-06-21 16:40:14,790 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 331 selfloop transitions, 20 changer transitions 0/354 dead transitions. [2024-06-21 16:40:14,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 354 transitions, 5634 flow [2024-06-21 16:40:14,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:40:14,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:40:14,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-21 16:40:14,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39372822299651566 [2024-06-21 16:40:14,792 INFO L175 Difference]: Start difference. First operand has 227 places, 341 transitions, 4898 flow. Second operand 7 states and 113 transitions. [2024-06-21 16:40:14,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 354 transitions, 5634 flow [2024-06-21 16:40:15,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 354 transitions, 5547 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-21 16:40:15,833 INFO L231 Difference]: Finished difference. Result has 229 places, 341 transitions, 4857 flow [2024-06-21 16:40:15,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4811, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4857, PETRI_PLACES=229, PETRI_TRANSITIONS=341} [2024-06-21 16:40:15,834 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 187 predicate places. [2024-06-21 16:40:15,834 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 341 transitions, 4857 flow [2024-06-21 16:40:15,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:40:15,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:40:15,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:40:15,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 16:40:15,835 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)] === [2024-06-21 16:40:15,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:40:15,835 INFO L85 PathProgramCache]: Analyzing trace with hash 885355941, now seen corresponding path program 3 times [2024-06-21 16:40:15,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:40:15,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443474933] [2024-06-21 16:40:15,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:40:15,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:40:15,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:40:16,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:40:16,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:40:16,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443474933] [2024-06-21 16:40:16,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443474933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:40:16,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:40:16,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:40:16,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640656810] [2024-06-21 16:40:16,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:40:16,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:40:16,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:40:16,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:40:16,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:40:16,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:40:16,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 341 transitions, 4857 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:40:16,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:40:16,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:40:16,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:40:17,738 INFO L124 PetriNetUnfolderBase]: 4901/7509 cut-off events. [2024-06-21 16:40:17,738 INFO L125 PetriNetUnfolderBase]: For 551887/551889 co-relation queries the response was YES. [2024-06-21 16:40:17,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61294 conditions, 7509 events. 4901/7509 cut-off events. For 551887/551889 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 43502 event pairs, 1338 based on Foata normal form. 6/7514 useless extension candidates. Maximal degree in co-relation 61183. Up to 7406 conditions per place. [2024-06-21 16:40:17,824 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 315 selfloop transitions, 35 changer transitions 0/353 dead transitions. [2024-06-21 16:40:17,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 353 transitions, 5703 flow [2024-06-21 16:40:17,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:40:17,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:40:17,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 16:40:17,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-21 16:40:17,825 INFO L175 Difference]: Start difference. First operand has 229 places, 341 transitions, 4857 flow. Second operand 7 states and 120 transitions. [2024-06-21 16:40:17,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 353 transitions, 5703 flow [2024-06-21 16:40:18,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 353 transitions, 5626 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 16:40:18,883 INFO L231 Difference]: Finished difference. Result has 230 places, 341 transitions, 4860 flow [2024-06-21 16:40:18,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4780, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4860, PETRI_PLACES=230, PETRI_TRANSITIONS=341} [2024-06-21 16:40:18,884 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 188 predicate places. [2024-06-21 16:40:18,884 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 341 transitions, 4860 flow [2024-06-21 16:40:18,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:40:18,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:40:18,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:40:18,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 16:40:18,885 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:40:18,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:40:18,885 INFO L85 PathProgramCache]: Analyzing trace with hash -560849860, now seen corresponding path program 9 times [2024-06-21 16:40:18,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:40:18,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793250133] [2024-06-21 16:40:18,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:40:18,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:40:18,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:40:19,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:40:19,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:40:19,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793250133] [2024-06-21 16:40:19,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793250133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:40:19,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:40:19,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:40:19,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982391855] [2024-06-21 16:40:19,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:40:19,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:40:19,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:40:19,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:40:19,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:40:19,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:40:19,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 341 transitions, 4860 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:40:19,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:40:19,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:40:19,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:40:21,555 INFO L124 PetriNetUnfolderBase]: 5439/8308 cut-off events. [2024-06-21 16:40:21,555 INFO L125 PetriNetUnfolderBase]: For 591328/591330 co-relation queries the response was YES. [2024-06-21 16:40:21,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67945 conditions, 8308 events. 5439/8308 cut-off events. For 591328/591330 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 48766 event pairs, 1128 based on Foata normal form. 8/8315 useless extension candidates. Maximal degree in co-relation 67833. Up to 6958 conditions per place. [2024-06-21 16:40:21,943 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 307 selfloop transitions, 160 changer transitions 0/470 dead transitions. [2024-06-21 16:40:21,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 470 transitions, 7721 flow [2024-06-21 16:40:21,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:40:21,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:40:21,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 16:40:21,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46612466124661245 [2024-06-21 16:40:21,944 INFO L175 Difference]: Start difference. First operand has 230 places, 341 transitions, 4860 flow. Second operand 9 states and 172 transitions. [2024-06-21 16:40:21,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 470 transitions, 7721 flow [2024-06-21 16:40:22,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 470 transitions, 7277 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-21 16:40:22,966 INFO L231 Difference]: Finished difference. Result has 235 places, 409 transitions, 6267 flow [2024-06-21 16:40:22,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4569, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6267, PETRI_PLACES=235, PETRI_TRANSITIONS=409} [2024-06-21 16:40:22,967 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-21 16:40:22,967 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 409 transitions, 6267 flow [2024-06-21 16:40:22,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:40:22,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:40:22,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:40:22,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 16:40:22,968 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)] === [2024-06-21 16:40:22,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:40:22,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1878506839, now seen corresponding path program 1 times [2024-06-21 16:40:22,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:40:22,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739593088] [2024-06-21 16:40:22,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:40:22,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:40:22,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:40:23,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:40:23,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:40:23,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739593088] [2024-06-21 16:40:23,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739593088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:40:23,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:40:23,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:40:23,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924833500] [2024-06-21 16:40:23,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:40:23,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:40:23,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:40:23,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:40:23,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:40:23,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:40:23,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 409 transitions, 6267 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:40:23,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:40:23,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:40:23,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:40:25,419 INFO L124 PetriNetUnfolderBase]: 5484/8361 cut-off events. [2024-06-21 16:40:25,420 INFO L125 PetriNetUnfolderBase]: For 617470/617470 co-relation queries the response was YES. [2024-06-21 16:40:25,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70384 conditions, 8361 events. 5484/8361 cut-off events. For 617470/617470 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 49014 event pairs, 1470 based on Foata normal form. 9/8369 useless extension candidates. Maximal degree in co-relation 70269. Up to 8165 conditions per place. [2024-06-21 16:40:25,535 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 401 selfloop transitions, 33 changer transitions 0/437 dead transitions. [2024-06-21 16:40:25,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 437 transitions, 7431 flow [2024-06-21 16:40:25,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:40:25,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:40:25,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 16:40:25,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425087108013937 [2024-06-21 16:40:25,537 INFO L175 Difference]: Start difference. First operand has 235 places, 409 transitions, 6267 flow. Second operand 7 states and 127 transitions. [2024-06-21 16:40:25,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 437 transitions, 7431 flow [2024-06-21 16:40:26,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 437 transitions, 7146 flow, removed 74 selfloop flow, removed 3 redundant places. [2024-06-21 16:40:26,998 INFO L231 Difference]: Finished difference. Result has 239 places, 416 transitions, 6156 flow [2024-06-21 16:40:26,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5984, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6156, PETRI_PLACES=239, PETRI_TRANSITIONS=416} [2024-06-21 16:40:26,998 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 197 predicate places. [2024-06-21 16:40:26,998 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 416 transitions, 6156 flow [2024-06-21 16:40:26,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:40:26,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:40:26,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:40:26,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 16:40:26,999 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)] === [2024-06-21 16:40:26,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:40:26,999 INFO L85 PathProgramCache]: Analyzing trace with hash -2051613451, now seen corresponding path program 2 times [2024-06-21 16:40:27,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:40:27,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686340146] [2024-06-21 16:40:27,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:40:27,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:40:27,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:40:27,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:40:27,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:40:27,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686340146] [2024-06-21 16:40:27,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686340146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:40:27,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:40:27,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:40:27,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866410648] [2024-06-21 16:40:27,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:40:27,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:40:27,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:40:27,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:40:27,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:40:27,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:40:27,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 416 transitions, 6156 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:40:27,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:40:27,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:40:27,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:40:29,092 INFO L124 PetriNetUnfolderBase]: 5499/8384 cut-off events. [2024-06-21 16:40:29,092 INFO L125 PetriNetUnfolderBase]: For 605997/605999 co-relation queries the response was YES. [2024-06-21 16:40:29,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69887 conditions, 8384 events. 5499/8384 cut-off events. For 605997/605999 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 49134 event pairs, 1504 based on Foata normal form. 3/8386 useless extension candidates. Maximal degree in co-relation 69771. Up to 8173 conditions per place. [2024-06-21 16:40:29,213 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 397 selfloop transitions, 41 changer transitions 0/441 dead transitions. [2024-06-21 16:40:29,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 441 transitions, 7426 flow [2024-06-21 16:40:29,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:40:29,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:40:29,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 16:40:29,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 16:40:29,214 INFO L175 Difference]: Start difference. First operand has 239 places, 416 transitions, 6156 flow. Second operand 7 states and 126 transitions. [2024-06-21 16:40:29,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 441 transitions, 7426 flow [2024-06-21 16:40:30,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 441 transitions, 7342 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-21 16:40:30,384 INFO L231 Difference]: Finished difference. Result has 243 places, 422 transitions, 6267 flow [2024-06-21 16:40:30,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6076, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6267, PETRI_PLACES=243, PETRI_TRANSITIONS=422} [2024-06-21 16:40:30,385 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 201 predicate places. [2024-06-21 16:40:30,385 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 422 transitions, 6267 flow [2024-06-21 16:40:30,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:40:30,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:40:30,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:40:30,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 16:40:30,386 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)] === [2024-06-21 16:40:30,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:40:30,386 INFO L85 PathProgramCache]: Analyzing trace with hash 885540825, now seen corresponding path program 3 times [2024-06-21 16:40:30,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:40:30,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658203071] [2024-06-21 16:40:30,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:40:30,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:40:30,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:40:30,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:40:30,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:40:30,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658203071] [2024-06-21 16:40:30,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658203071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:40:30,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:40:30,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:40:30,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473230271] [2024-06-21 16:40:30,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:40:30,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:40:30,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:40:30,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:40:30,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:40:30,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:40:30,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 422 transitions, 6267 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:40:30,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:40:30,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:40:30,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:40:32,795 INFO L124 PetriNetUnfolderBase]: 5490/8372 cut-off events. [2024-06-21 16:40:32,796 INFO L125 PetriNetUnfolderBase]: For 618489/618491 co-relation queries the response was YES. [2024-06-21 16:40:32,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69951 conditions, 8372 events. 5490/8372 cut-off events. For 618489/618491 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 49119 event pairs, 1500 based on Foata normal form. 3/8374 useless extension candidates. Maximal degree in co-relation 69833. Up to 8169 conditions per place. [2024-06-21 16:40:32,889 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 400 selfloop transitions, 39 changer transitions 0/442 dead transitions. [2024-06-21 16:40:32,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 442 transitions, 7323 flow [2024-06-21 16:40:32,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:40:32,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:40:32,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 16:40:32,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 16:40:32,891 INFO L175 Difference]: Start difference. First operand has 243 places, 422 transitions, 6267 flow. Second operand 7 states and 126 transitions. [2024-06-21 16:40:32,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 442 transitions, 7323 flow [2024-06-21 16:40:34,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 442 transitions, 7215 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-06-21 16:40:34,062 INFO L231 Difference]: Finished difference. Result has 247 places, 422 transitions, 6243 flow [2024-06-21 16:40:34,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6159, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6243, PETRI_PLACES=247, PETRI_TRANSITIONS=422} [2024-06-21 16:40:34,063 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 205 predicate places. [2024-06-21 16:40:34,063 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 422 transitions, 6243 flow [2024-06-21 16:40:34,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:40:34,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:40:34,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:40:34,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 16:40:34,064 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)] === [2024-06-21 16:40:34,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:40:34,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1169442142, now seen corresponding path program 1 times [2024-06-21 16:40:34,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:40:34,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280287590] [2024-06-21 16:40:34,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:40:34,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:40:34,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:40:34,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:40:34,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:40:34,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280287590] [2024-06-21 16:40:34,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280287590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:40:34,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:40:34,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:40:34,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594259166] [2024-06-21 16:40:34,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:40:34,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:40:34,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:40:34,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:40:34,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:40:34,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:40:34,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 422 transitions, 6243 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:40:34,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:40:34,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:40:34,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:40:36,470 INFO L124 PetriNetUnfolderBase]: 5515/8402 cut-off events. [2024-06-21 16:40:36,470 INFO L125 PetriNetUnfolderBase]: For 637000/637008 co-relation queries the response was YES. [2024-06-21 16:40:36,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70407 conditions, 8402 events. 5515/8402 cut-off events. For 637000/637008 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 49221 event pairs, 1160 based on Foata normal form. 11/8412 useless extension candidates. Maximal degree in co-relation 70287. Up to 6908 conditions per place. [2024-06-21 16:40:36,579 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 282 selfloop transitions, 180 changer transitions 0/465 dead transitions. [2024-06-21 16:40:36,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 465 transitions, 7789 flow [2024-06-21 16:40:36,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:40:36,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:40:36,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 16:40:36,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-21 16:40:36,580 INFO L175 Difference]: Start difference. First operand has 247 places, 422 transitions, 6243 flow. Second operand 8 states and 160 transitions. [2024-06-21 16:40:36,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 465 transitions, 7789 flow [2024-06-21 16:40:38,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 465 transitions, 7693 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 16:40:38,195 INFO L231 Difference]: Finished difference. Result has 249 places, 430 transitions, 6667 flow [2024-06-21 16:40:38,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6147, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6667, PETRI_PLACES=249, PETRI_TRANSITIONS=430} [2024-06-21 16:40:38,196 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 207 predicate places. [2024-06-21 16:40:38,196 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 430 transitions, 6667 flow [2024-06-21 16:40:38,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:40:38,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:40:38,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:40:38,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 16:40:38,197 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)] === [2024-06-21 16:40:38,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:40:38,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1202988957, now seen corresponding path program 1 times [2024-06-21 16:40:38,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:40:38,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385543758] [2024-06-21 16:40:38,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:40:38,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:40:38,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:40:38,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:40:38,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:40:38,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385543758] [2024-06-21 16:40:38,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385543758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:40:38,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:40:38,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:40:38,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885593732] [2024-06-21 16:40:38,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:40:38,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:40:38,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:40:38,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:40:38,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:40:39,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:40:39,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 430 transitions, 6667 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:40:39,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:40:39,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:40:39,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:40:40,648 INFO L124 PetriNetUnfolderBase]: 5775/8761 cut-off events. [2024-06-21 16:40:40,648 INFO L125 PetriNetUnfolderBase]: For 726149/726157 co-relation queries the response was YES. [2024-06-21 16:40:40,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76163 conditions, 8761 events. 5775/8761 cut-off events. For 726149/726157 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 51423 event pairs, 1207 based on Foata normal form. 20/8780 useless extension candidates. Maximal degree in co-relation 76042. Up to 7082 conditions per place. [2024-06-21 16:40:40,778 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 354 selfloop transitions, 132 changer transitions 0/489 dead transitions. [2024-06-21 16:40:40,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 489 transitions, 8489 flow [2024-06-21 16:40:40,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:40:40,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:40:40,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-21 16:40:40,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49085365853658536 [2024-06-21 16:40:40,780 INFO L175 Difference]: Start difference. First operand has 249 places, 430 transitions, 6667 flow. Second operand 8 states and 161 transitions. [2024-06-21 16:40:40,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 489 transitions, 8489 flow [2024-06-21 16:40:42,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 489 transitions, 8131 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-21 16:40:42,295 INFO L231 Difference]: Finished difference. Result has 254 places, 449 transitions, 6979 flow [2024-06-21 16:40:42,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6309, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6979, PETRI_PLACES=254, PETRI_TRANSITIONS=449} [2024-06-21 16:40:42,296 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 212 predicate places. [2024-06-21 16:40:42,296 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 449 transitions, 6979 flow [2024-06-21 16:40:42,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:40:42,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:40:42,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:40:42,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 16:40:42,297 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)] === [2024-06-21 16:40:42,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:40:42,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1169710912, now seen corresponding path program 2 times [2024-06-21 16:40:42,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:40:42,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478343649] [2024-06-21 16:40:42,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:40:42,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:40:42,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:40:42,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:40:42,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:40:42,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478343649] [2024-06-21 16:40:42,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478343649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:40:42,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:40:42,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:40:42,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598629738] [2024-06-21 16:40:42,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:40:42,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:40:42,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:40:42,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:40:42,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:40:43,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:40:43,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 449 transitions, 6979 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:40:43,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:40:43,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:40:43,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:40:44,826 INFO L124 PetriNetUnfolderBase]: 5795/8789 cut-off events. [2024-06-21 16:40:44,827 INFO L125 PetriNetUnfolderBase]: For 739509/739517 co-relation queries the response was YES. [2024-06-21 16:40:44,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78717 conditions, 8789 events. 5795/8789 cut-off events. For 739509/739517 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 51701 event pairs, 1171 based on Foata normal form. 12/8800 useless extension candidates. Maximal degree in co-relation 78593. Up to 7686 conditions per place. [2024-06-21 16:40:44,933 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 336 selfloop transitions, 142 changer transitions 0/481 dead transitions. [2024-06-21 16:40:44,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 481 transitions, 8254 flow [2024-06-21 16:40:44,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:40:44,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:40:44,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 16:40:44,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2024-06-21 16:40:44,934 INFO L175 Difference]: Start difference. First operand has 254 places, 449 transitions, 6979 flow. Second operand 8 states and 150 transitions. [2024-06-21 16:40:44,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 481 transitions, 8254 flow [2024-06-21 16:40:46,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 481 transitions, 8113 flow, removed 59 selfloop flow, removed 2 redundant places. [2024-06-21 16:40:46,176 INFO L231 Difference]: Finished difference. Result has 260 places, 454 transitions, 7239 flow [2024-06-21 16:40:46,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6838, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7239, PETRI_PLACES=260, PETRI_TRANSITIONS=454} [2024-06-21 16:40:46,177 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 218 predicate places. [2024-06-21 16:40:46,177 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 454 transitions, 7239 flow [2024-06-21 16:40:46,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:40:46,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:40:46,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:40:46,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 16:40:46,178 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)] === [2024-06-21 16:40:46,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:40:46,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1173255390, now seen corresponding path program 1 times [2024-06-21 16:40:46,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:40:46,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715492775] [2024-06-21 16:40:46,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:40:46,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:40:46,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:40:46,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:40:46,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:40:46,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715492775] [2024-06-21 16:40:46,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715492775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:40:46,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:40:46,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:40:46,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629717963] [2024-06-21 16:40:46,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:40:46,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:40:46,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:40:46,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:40:46,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:40:46,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:40:46,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 454 transitions, 7239 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:40:46,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:40:46,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:40:46,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:40:48,396 INFO L124 PetriNetUnfolderBase]: 5785/8786 cut-off events. [2024-06-21 16:40:48,397 INFO L125 PetriNetUnfolderBase]: For 765231/765233 co-relation queries the response was YES. [2024-06-21 16:40:48,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78615 conditions, 8786 events. 5785/8786 cut-off events. For 765231/765233 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 51676 event pairs, 1208 based on Foata normal form. 20/8805 useless extension candidates. Maximal degree in co-relation 78488. Up to 7705 conditions per place. [2024-06-21 16:40:48,521 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 349 selfloop transitions, 135 changer transitions 0/487 dead transitions. [2024-06-21 16:40:48,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 487 transitions, 8771 flow [2024-06-21 16:40:48,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:40:48,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:40:48,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-21 16:40:48,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-21 16:40:48,523 INFO L175 Difference]: Start difference. First operand has 260 places, 454 transitions, 7239 flow. Second operand 7 states and 133 transitions. [2024-06-21 16:40:48,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 487 transitions, 8771 flow [2024-06-21 16:40:49,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 487 transitions, 8437 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-21 16:40:49,966 INFO L231 Difference]: Finished difference. Result has 261 places, 464 transitions, 7430 flow [2024-06-21 16:40:49,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6919, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7430, PETRI_PLACES=261, PETRI_TRANSITIONS=464} [2024-06-21 16:40:49,975 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 219 predicate places. [2024-06-21 16:40:49,975 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 464 transitions, 7430 flow [2024-06-21 16:40:49,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:40:49,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:40:49,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:40:49,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 16:40:49,976 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)] === [2024-06-21 16:40:49,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:40:49,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1178969310, now seen corresponding path program 2 times [2024-06-21 16:40:49,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:40:49,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611724208] [2024-06-21 16:40:49,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:40:49,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:40:49,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:40:50,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:40:50,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:40:50,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611724208] [2024-06-21 16:40:50,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611724208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:40:50,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:40:50,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:40:50,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274174084] [2024-06-21 16:40:50,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:40:50,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:40:50,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:40:50,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:40:50,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:40:50,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:40:50,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 464 transitions, 7430 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:40:50,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:40:50,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:40:50,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:40:52,201 INFO L124 PetriNetUnfolderBase]: 5720/8684 cut-off events. [2024-06-21 16:40:52,202 INFO L125 PetriNetUnfolderBase]: For 744890/744892 co-relation queries the response was YES. [2024-06-21 16:40:52,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77559 conditions, 8684 events. 5720/8684 cut-off events. For 744890/744892 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 50947 event pairs, 1252 based on Foata normal form. 8/8691 useless extension candidates. Maximal degree in co-relation 77431. Up to 7633 conditions per place. [2024-06-21 16:40:52,328 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 328 selfloop transitions, 151 changer transitions 0/482 dead transitions. [2024-06-21 16:40:52,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 482 transitions, 8704 flow [2024-06-21 16:40:52,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:40:52,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:40:52,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-21 16:40:52,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445993031358885 [2024-06-21 16:40:52,331 INFO L175 Difference]: Start difference. First operand has 261 places, 464 transitions, 7430 flow. Second operand 7 states and 128 transitions. [2024-06-21 16:40:52,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 482 transitions, 8704 flow [2024-06-21 16:40:53,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 482 transitions, 8477 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 16:40:53,765 INFO L231 Difference]: Finished difference. Result has 264 places, 464 transitions, 7520 flow [2024-06-21 16:40:53,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7203, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7520, PETRI_PLACES=264, PETRI_TRANSITIONS=464} [2024-06-21 16:40:53,766 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 222 predicate places. [2024-06-21 16:40:53,766 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 464 transitions, 7520 flow [2024-06-21 16:40:53,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:40:53,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:40:53,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:40:53,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 16:40:53,767 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:40:53,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:40:53,767 INFO L85 PathProgramCache]: Analyzing trace with hash 223002891, now seen corresponding path program 1 times [2024-06-21 16:40:53,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:40:53,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572429454] [2024-06-21 16:40:53,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:40:53,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:40:53,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:40:54,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:40:54,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:40:54,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572429454] [2024-06-21 16:40:54,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572429454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:40:54,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:40:54,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:40:54,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141421880] [2024-06-21 16:40:54,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:40:54,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:40:54,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:40:54,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:40:54,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:40:55,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:40:55,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 464 transitions, 7520 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:40:55,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:40:55,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:40:55,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:40:56,857 INFO L124 PetriNetUnfolderBase]: 5788/8806 cut-off events. [2024-06-21 16:40:56,857 INFO L125 PetriNetUnfolderBase]: For 800980/800982 co-relation queries the response was YES. [2024-06-21 16:40:56,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79168 conditions, 8806 events. 5788/8806 cut-off events. For 800980/800982 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 51991 event pairs, 1169 based on Foata normal form. 18/8823 useless extension candidates. Maximal degree in co-relation 79039. Up to 7125 conditions per place. [2024-06-21 16:40:56,971 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 287 selfloop transitions, 213 changer transitions 0/503 dead transitions. [2024-06-21 16:40:56,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 503 transitions, 8904 flow [2024-06-21 16:40:56,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:40:56,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:40:56,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 16:40:56,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-21 16:40:56,973 INFO L175 Difference]: Start difference. First operand has 264 places, 464 transitions, 7520 flow. Second operand 9 states and 168 transitions. [2024-06-21 16:40:56,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 503 transitions, 8904 flow [2024-06-21 16:40:58,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 503 transitions, 8661 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 16:40:58,536 INFO L231 Difference]: Finished difference. Result has 269 places, 466 transitions, 7846 flow [2024-06-21 16:40:58,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7277, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7846, PETRI_PLACES=269, PETRI_TRANSITIONS=466} [2024-06-21 16:40:58,539 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 227 predicate places. [2024-06-21 16:40:58,539 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 466 transitions, 7846 flow [2024-06-21 16:40:58,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:40:58,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:40:58,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:40:58,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 16:40:58,539 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)] === [2024-06-21 16:40:58,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:40:58,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1595062801, now seen corresponding path program 2 times [2024-06-21 16:40:58,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:40:58,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852979889] [2024-06-21 16:40:58,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:40:58,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:40:58,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:40:59,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:40:59,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:40:59,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852979889] [2024-06-21 16:40:59,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852979889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:40:59,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:40:59,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:40:59,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734200143] [2024-06-21 16:40:59,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:40:59,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:40:59,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:40:59,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:40:59,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:40:59,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:40:59,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 466 transitions, 7846 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:40:59,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:40:59,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:40:59,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:41:00,999 INFO L124 PetriNetUnfolderBase]: 6106/9241 cut-off events. [2024-06-21 16:41:00,999 INFO L125 PetriNetUnfolderBase]: For 890955/890957 co-relation queries the response was YES. [2024-06-21 16:41:01,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85732 conditions, 9241 events. 6106/9241 cut-off events. For 890955/890957 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 54502 event pairs, 1283 based on Foata normal form. 14/9254 useless extension candidates. Maximal degree in co-relation 85602. Up to 7337 conditions per place. [2024-06-21 16:41:01,116 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 349 selfloop transitions, 161 changer transitions 0/513 dead transitions. [2024-06-21 16:41:01,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 513 transitions, 9822 flow [2024-06-21 16:41:01,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:41:01,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:41:01,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 16:41:01,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-21 16:41:01,117 INFO L175 Difference]: Start difference. First operand has 269 places, 466 transitions, 7846 flow. Second operand 8 states and 156 transitions. [2024-06-21 16:41:01,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 513 transitions, 9822 flow [2024-06-21 16:41:02,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 513 transitions, 9281 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-06-21 16:41:02,672 INFO L231 Difference]: Finished difference. Result has 271 places, 479 transitions, 7929 flow [2024-06-21 16:41:02,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7305, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7929, PETRI_PLACES=271, PETRI_TRANSITIONS=479} [2024-06-21 16:41:02,673 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 229 predicate places. [2024-06-21 16:41:02,673 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 479 transitions, 7929 flow [2024-06-21 16:41:02,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:41:02,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:41:02,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:41:02,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 16:41:02,673 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)] === [2024-06-21 16:41:02,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:41:02,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1595074302, now seen corresponding path program 3 times [2024-06-21 16:41:02,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:41:02,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438224686] [2024-06-21 16:41:02,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:41:02,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:41:02,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:41:03,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:41:03,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:41:03,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438224686] [2024-06-21 16:41:03,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438224686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:41:03,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:41:03,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:41:03,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969250788] [2024-06-21 16:41:03,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:41:03,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:41:03,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:41:03,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:41:03,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:41:03,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:41:03,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 479 transitions, 7929 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:41:03,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:41:03,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:41:03,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:41:05,520 INFO L124 PetriNetUnfolderBase]: 6132/9278 cut-off events. [2024-06-21 16:41:05,520 INFO L125 PetriNetUnfolderBase]: For 888167/888169 co-relation queries the response was YES. [2024-06-21 16:41:05,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86037 conditions, 9278 events. 6132/9278 cut-off events. For 888167/888169 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 54681 event pairs, 1341 based on Foata normal form. 6/9283 useless extension candidates. Maximal degree in co-relation 85905. Up to 8190 conditions per place. [2024-06-21 16:41:05,635 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 345 selfloop transitions, 157 changer transitions 0/505 dead transitions. [2024-06-21 16:41:05,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 505 transitions, 9382 flow [2024-06-21 16:41:05,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:41:05,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:41:05,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 16:41:05,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-21 16:41:05,636 INFO L175 Difference]: Start difference. First operand has 271 places, 479 transitions, 7929 flow. Second operand 8 states and 145 transitions. [2024-06-21 16:41:05,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 505 transitions, 9382 flow [2024-06-21 16:41:07,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 505 transitions, 9059 flow, removed 69 selfloop flow, removed 4 redundant places. [2024-06-21 16:41:07,345 INFO L231 Difference]: Finished difference. Result has 275 places, 484 transitions, 8047 flow [2024-06-21 16:41:07,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7606, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8047, PETRI_PLACES=275, PETRI_TRANSITIONS=484} [2024-06-21 16:41:07,345 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 233 predicate places. [2024-06-21 16:41:07,345 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 484 transitions, 8047 flow [2024-06-21 16:41:07,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:41:07,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:41:07,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:41:07,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 16:41:07,346 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)] === [2024-06-21 16:41:07,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:41:07,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1595073961, now seen corresponding path program 3 times [2024-06-21 16:41:07,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:41:07,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048332875] [2024-06-21 16:41:07,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:41:07,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:41:07,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:41:07,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:41:07,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:41:07,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048332875] [2024-06-21 16:41:07,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048332875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:41:07,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:41:07,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:41:07,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815194319] [2024-06-21 16:41:07,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:41:07,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:41:07,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:41:07,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:41:07,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:41:08,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:41:08,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 484 transitions, 8047 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:41:08,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:41:08,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:41:08,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:41:09,882 INFO L124 PetriNetUnfolderBase]: 6114/9257 cut-off events. [2024-06-21 16:41:09,882 INFO L125 PetriNetUnfolderBase]: For 896967/896969 co-relation queries the response was YES. [2024-06-21 16:41:10,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84184 conditions, 9257 events. 6114/9257 cut-off events. For 896967/896969 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 54639 event pairs, 1284 based on Foata normal form. 14/9270 useless extension candidates. Maximal degree in co-relation 84051. Up to 7370 conditions per place. [2024-06-21 16:41:10,210 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 363 selfloop transitions, 154 changer transitions 0/520 dead transitions. [2024-06-21 16:41:10,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 520 transitions, 9687 flow [2024-06-21 16:41:10,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:41:10,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:41:10,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-21 16:41:10,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4817073170731707 [2024-06-21 16:41:10,211 INFO L175 Difference]: Start difference. First operand has 275 places, 484 transitions, 8047 flow. Second operand 8 states and 158 transitions. [2024-06-21 16:41:10,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 520 transitions, 9687 flow [2024-06-21 16:41:11,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 520 transitions, 9408 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-21 16:41:11,763 INFO L231 Difference]: Finished difference. Result has 279 places, 486 transitions, 8122 flow [2024-06-21 16:41:11,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7768, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8122, PETRI_PLACES=279, PETRI_TRANSITIONS=486} [2024-06-21 16:41:11,764 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 237 predicate places. [2024-06-21 16:41:11,764 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 486 transitions, 8122 flow [2024-06-21 16:41:11,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:41:11,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:41:11,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:41:11,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 16:41:11,765 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)] === [2024-06-21 16:41:11,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:41:11,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1014033822, now seen corresponding path program 3 times [2024-06-21 16:41:11,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:41:11,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240380606] [2024-06-21 16:41:11,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:41:11,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:41:11,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:41:12,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:41:12,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:41:12,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240380606] [2024-06-21 16:41:12,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240380606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:41:12,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:41:12,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:41:12,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960936308] [2024-06-21 16:41:12,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:41:12,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:41:12,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:41:12,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:41:12,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:41:12,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:41:12,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 486 transitions, 8122 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:12,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:41:12,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:41:12,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:41:14,162 INFO L124 PetriNetUnfolderBase]: 6036/9143 cut-off events. [2024-06-21 16:41:14,162 INFO L125 PetriNetUnfolderBase]: For 891262/891262 co-relation queries the response was YES. [2024-06-21 16:41:14,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83317 conditions, 9143 events. 6036/9143 cut-off events. For 891262/891262 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 53970 event pairs, 1620 based on Foata normal form. 6/9148 useless extension candidates. Maximal degree in co-relation 83183. Up to 8932 conditions per place. [2024-06-21 16:41:14,290 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 459 selfloop transitions, 42 changer transitions 0/504 dead transitions. [2024-06-21 16:41:14,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 504 transitions, 9324 flow [2024-06-21 16:41:14,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:41:14,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:41:14,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 16:41:14,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-21 16:41:14,291 INFO L175 Difference]: Start difference. First operand has 279 places, 486 transitions, 8122 flow. Second operand 7 states and 122 transitions. [2024-06-21 16:41:14,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 504 transitions, 9324 flow [2024-06-21 16:41:16,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 504 transitions, 9023 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-21 16:41:16,167 INFO L231 Difference]: Finished difference. Result has 281 places, 486 transitions, 7918 flow [2024-06-21 16:41:16,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7821, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7918, PETRI_PLACES=281, PETRI_TRANSITIONS=486} [2024-06-21 16:41:16,168 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 239 predicate places. [2024-06-21 16:41:16,168 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 486 transitions, 7918 flow [2024-06-21 16:41:16,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:16,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:41:16,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:41:16,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 16:41:16,169 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)] === [2024-06-21 16:41:16,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:41:16,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1058253000, now seen corresponding path program 4 times [2024-06-21 16:41:16,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:41:16,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814258759] [2024-06-21 16:41:16,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:41:16,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:41:16,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:41:16,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:41:16,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:41:16,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814258759] [2024-06-21 16:41:16,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814258759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:41:16,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:41:16,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:41:16,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686014151] [2024-06-21 16:41:16,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:41:16,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:41:16,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:41:16,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:41:16,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:41:16,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:41:16,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 486 transitions, 7918 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:16,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:41:16,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:41:16,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:41:18,686 INFO L124 PetriNetUnfolderBase]: 6031/9132 cut-off events. [2024-06-21 16:41:18,687 INFO L125 PetriNetUnfolderBase]: For 893644/893644 co-relation queries the response was YES. [2024-06-21 16:41:18,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82367 conditions, 9132 events. 6031/9132 cut-off events. For 893644/893644 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 53813 event pairs, 1643 based on Foata normal form. 3/9134 useless extension candidates. Maximal degree in co-relation 82232. Up to 9058 conditions per place. [2024-06-21 16:41:18,820 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 475 selfloop transitions, 24 changer transitions 0/502 dead transitions. [2024-06-21 16:41:18,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 502 transitions, 9022 flow [2024-06-21 16:41:18,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:41:18,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:41:18,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-21 16:41:18,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40418118466898956 [2024-06-21 16:41:18,822 INFO L175 Difference]: Start difference. First operand has 281 places, 486 transitions, 7918 flow. Second operand 7 states and 116 transitions. [2024-06-21 16:41:18,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 502 transitions, 9022 flow [2024-06-21 16:41:20,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 502 transitions, 8777 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 16:41:20,826 INFO L231 Difference]: Finished difference. Result has 281 places, 489 transitions, 7800 flow [2024-06-21 16:41:20,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7675, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7800, PETRI_PLACES=281, PETRI_TRANSITIONS=489} [2024-06-21 16:41:20,827 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 239 predicate places. [2024-06-21 16:41:20,827 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 489 transitions, 7800 flow [2024-06-21 16:41:20,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:20,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:41:20,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:41:20,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 16:41:20,828 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:41:20,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:41:20,828 INFO L85 PathProgramCache]: Analyzing trace with hash -505274529, now seen corresponding path program 2 times [2024-06-21 16:41:20,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:41:20,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389469715] [2024-06-21 16:41:20,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:41:20,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:41:20,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:41:21,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:41:21,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:41:21,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389469715] [2024-06-21 16:41:21,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389469715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:41:21,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:41:21,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:41:21,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605829284] [2024-06-21 16:41:21,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:41:21,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:41:21,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:41:21,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:41:21,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:41:21,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:41:21,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 489 transitions, 7800 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:21,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:41:21,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:41:21,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:41:23,698 INFO L124 PetriNetUnfolderBase]: 6092/9237 cut-off events. [2024-06-21 16:41:23,698 INFO L125 PetriNetUnfolderBase]: For 960109/960113 co-relation queries the response was YES. [2024-06-21 16:41:23,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83259 conditions, 9237 events. 6092/9237 cut-off events. For 960109/960113 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 54708 event pairs, 1608 based on Foata normal form. 22/9258 useless extension candidates. Maximal degree in co-relation 83123. Up to 8975 conditions per place. [2024-06-21 16:41:23,836 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 485 selfloop transitions, 35 changer transitions 0/523 dead transitions. [2024-06-21 16:41:23,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 523 transitions, 9084 flow [2024-06-21 16:41:23,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:41:23,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:41:23,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-21 16:41:23,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-21 16:41:23,838 INFO L175 Difference]: Start difference. First operand has 281 places, 489 transitions, 7800 flow. Second operand 9 states and 158 transitions. [2024-06-21 16:41:23,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 523 transitions, 9084 flow [2024-06-21 16:41:25,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 523 transitions, 9009 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 16:41:25,843 INFO L231 Difference]: Finished difference. Result has 284 places, 491 transitions, 7940 flow [2024-06-21 16:41:25,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7725, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7940, PETRI_PLACES=284, PETRI_TRANSITIONS=491} [2024-06-21 16:41:25,844 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 242 predicate places. [2024-06-21 16:41:25,844 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 491 transitions, 7940 flow [2024-06-21 16:41:25,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:25,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:41:25,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:41:25,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 16:41:25,844 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:41:25,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:41:25,845 INFO L85 PathProgramCache]: Analyzing trace with hash 573293043, now seen corresponding path program 3 times [2024-06-21 16:41:25,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:41:25,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678905189] [2024-06-21 16:41:25,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:41:25,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:41:25,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:41:26,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:41:26,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:41:26,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678905189] [2024-06-21 16:41:26,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678905189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:41:26,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:41:26,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:41:26,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471944774] [2024-06-21 16:41:26,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:41:26,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:41:26,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:41:26,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:41:26,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:41:26,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:41:26,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 491 transitions, 7940 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:26,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:41:26,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:41:26,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:41:29,094 INFO L124 PetriNetUnfolderBase]: 6153/9342 cut-off events. [2024-06-21 16:41:29,094 INFO L125 PetriNetUnfolderBase]: For 1001317/1001321 co-relation queries the response was YES. [2024-06-21 16:41:29,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84813 conditions, 9342 events. 6153/9342 cut-off events. For 1001317/1001321 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 55649 event pairs, 1628 based on Foata normal form. 22/9363 useless extension candidates. Maximal degree in co-relation 84676. Up to 9020 conditions per place. [2024-06-21 16:41:29,207 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 482 selfloop transitions, 40 changer transitions 0/525 dead transitions. [2024-06-21 16:41:29,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 525 transitions, 9226 flow [2024-06-21 16:41:29,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:41:29,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:41:29,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 16:41:29,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-21 16:41:29,208 INFO L175 Difference]: Start difference. First operand has 284 places, 491 transitions, 7940 flow. Second operand 9 states and 159 transitions. [2024-06-21 16:41:29,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 525 transitions, 9226 flow [2024-06-21 16:41:31,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 525 transitions, 9042 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-21 16:41:31,035 INFO L231 Difference]: Finished difference. Result has 287 places, 493 transitions, 7985 flow [2024-06-21 16:41:31,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7756, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7985, PETRI_PLACES=287, PETRI_TRANSITIONS=493} [2024-06-21 16:41:31,039 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 245 predicate places. [2024-06-21 16:41:31,039 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 493 transitions, 7985 flow [2024-06-21 16:41:31,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:31,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:41:31,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:41:31,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 16:41:31,040 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:41:31,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:41:31,040 INFO L85 PathProgramCache]: Analyzing trace with hash 219974131, now seen corresponding path program 4 times [2024-06-21 16:41:31,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:41:31,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988698925] [2024-06-21 16:41:31,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:41:31,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:41:31,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:41:31,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:41:31,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:41:31,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988698925] [2024-06-21 16:41:31,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988698925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:41:31,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:41:31,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:41:31,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76637256] [2024-06-21 16:41:31,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:41:31,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:41:31,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:41:31,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:41:31,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:41:32,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:41:32,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 493 transitions, 7985 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:32,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:41:32,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:41:32,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:41:34,029 INFO L124 PetriNetUnfolderBase]: 6214/9442 cut-off events. [2024-06-21 16:41:34,029 INFO L125 PetriNetUnfolderBase]: For 1025750/1025754 co-relation queries the response was YES. [2024-06-21 16:41:34,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85625 conditions, 9442 events. 6214/9442 cut-off events. For 1025750/1025754 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 56262 event pairs, 1642 based on Foata normal form. 22/9463 useless extension candidates. Maximal degree in co-relation 85487. Up to 9180 conditions per place. [2024-06-21 16:41:34,176 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 489 selfloop transitions, 35 changer transitions 0/527 dead transitions. [2024-06-21 16:41:34,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 527 transitions, 9273 flow [2024-06-21 16:41:34,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:41:34,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:41:34,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-21 16:41:34,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-21 16:41:34,177 INFO L175 Difference]: Start difference. First operand has 287 places, 493 transitions, 7985 flow. Second operand 9 states and 158 transitions. [2024-06-21 16:41:34,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 527 transitions, 9273 flow [2024-06-21 16:41:36,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 527 transitions, 9068 flow, removed 64 selfloop flow, removed 7 redundant places. [2024-06-21 16:41:36,185 INFO L231 Difference]: Finished difference. Result has 289 places, 495 transitions, 8003 flow [2024-06-21 16:41:36,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7780, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8003, PETRI_PLACES=289, PETRI_TRANSITIONS=495} [2024-06-21 16:41:36,186 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 247 predicate places. [2024-06-21 16:41:36,186 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 495 transitions, 8003 flow [2024-06-21 16:41:36,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:36,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:41:36,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:41:36,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 16:41:36,187 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:41:36,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:41:36,188 INFO L85 PathProgramCache]: Analyzing trace with hash -65356379, now seen corresponding path program 5 times [2024-06-21 16:41:36,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:41:36,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296420224] [2024-06-21 16:41:36,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:41:36,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:41:36,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:41:37,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:41:37,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:41:37,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296420224] [2024-06-21 16:41:37,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296420224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:41:37,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:41:37,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:41:37,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776593906] [2024-06-21 16:41:37,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:41:37,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:41:37,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:41:37,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:41:37,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:41:37,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:41:37,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 495 transitions, 8003 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:37,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:41:37,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:41:37,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:41:39,454 INFO L124 PetriNetUnfolderBase]: 6275/9546 cut-off events. [2024-06-21 16:41:39,455 INFO L125 PetriNetUnfolderBase]: For 1052369/1052373 co-relation queries the response was YES. [2024-06-21 16:41:39,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86348 conditions, 9546 events. 6275/9546 cut-off events. For 1052369/1052373 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 57248 event pairs, 1637 based on Foata normal form. 22/9567 useless extension candidates. Maximal degree in co-relation 86209. Up to 9126 conditions per place. [2024-06-21 16:41:39,601 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 475 selfloop transitions, 53 changer transitions 0/531 dead transitions. [2024-06-21 16:41:39,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 531 transitions, 9323 flow [2024-06-21 16:41:39,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:41:39,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:41:39,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 16:41:39,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-21 16:41:39,602 INFO L175 Difference]: Start difference. First operand has 289 places, 495 transitions, 8003 flow. Second operand 9 states and 160 transitions. [2024-06-21 16:41:39,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 531 transitions, 9323 flow [2024-06-21 16:41:41,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 531 transitions, 9124 flow, removed 66 selfloop flow, removed 7 redundant places. [2024-06-21 16:41:41,797 INFO L231 Difference]: Finished difference. Result has 291 places, 497 transitions, 8070 flow [2024-06-21 16:41:41,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7804, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8070, PETRI_PLACES=291, PETRI_TRANSITIONS=497} [2024-06-21 16:41:41,798 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 249 predicate places. [2024-06-21 16:41:41,798 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 497 transitions, 8070 flow [2024-06-21 16:41:41,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:41,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:41:41,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:41:41,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 16:41:41,799 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:41:41,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:41:41,799 INFO L85 PathProgramCache]: Analyzing trace with hash -65125739, now seen corresponding path program 6 times [2024-06-21 16:41:41,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:41:41,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124228783] [2024-06-21 16:41:41,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:41:41,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:41:41,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:41:42,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:41:42,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:41:42,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124228783] [2024-06-21 16:41:42,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124228783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:41:42,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:41:42,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:41:42,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161791268] [2024-06-21 16:41:42,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:41:42,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:41:42,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:41:42,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:41:42,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:41:42,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:41:42,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 497 transitions, 8070 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:42,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:41:42,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:41:42,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:41:44,898 INFO L124 PetriNetUnfolderBase]: 6275/9548 cut-off events. [2024-06-21 16:41:44,899 INFO L125 PetriNetUnfolderBase]: For 1043595/1043599 co-relation queries the response was YES. [2024-06-21 16:41:45,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85397 conditions, 9548 events. 6275/9548 cut-off events. For 1043595/1043599 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 57241 event pairs, 1621 based on Foata normal form. 22/9569 useless extension candidates. Maximal degree in co-relation 85257. Up to 9013 conditions per place. [2024-06-21 16:41:45,049 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 464 selfloop transitions, 63 changer transitions 0/530 dead transitions. [2024-06-21 16:41:45,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 530 transitions, 9184 flow [2024-06-21 16:41:45,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:41:45,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:41:45,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 16:41:45,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-21 16:41:45,050 INFO L175 Difference]: Start difference. First operand has 291 places, 497 transitions, 8070 flow. Second operand 9 states and 160 transitions. [2024-06-21 16:41:45,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 530 transitions, 9184 flow [2024-06-21 16:41:47,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 530 transitions, 8944 flow, removed 70 selfloop flow, removed 7 redundant places. [2024-06-21 16:41:47,146 INFO L231 Difference]: Finished difference. Result has 292 places, 497 transitions, 7918 flow [2024-06-21 16:41:47,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7728, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7918, PETRI_PLACES=292, PETRI_TRANSITIONS=497} [2024-06-21 16:41:47,146 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 250 predicate places. [2024-06-21 16:41:47,147 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 497 transitions, 7918 flow [2024-06-21 16:41:47,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:47,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:41:47,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:41:47,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 16:41:47,147 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)] === [2024-06-21 16:41:47,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:41:47,148 INFO L85 PathProgramCache]: Analyzing trace with hash 811414400, now seen corresponding path program 5 times [2024-06-21 16:41:47,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:41:47,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151034689] [2024-06-21 16:41:47,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:41:47,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:41:47,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:41:47,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:41:47,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:41:47,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151034689] [2024-06-21 16:41:47,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151034689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:41:47,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:41:47,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:41:47,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70127219] [2024-06-21 16:41:47,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:41:47,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:41:47,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:41:47,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:41:47,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:41:47,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:41:47,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 497 transitions, 7918 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:47,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:41:47,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:41:47,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:41:49,718 INFO L124 PetriNetUnfolderBase]: 6248/9503 cut-off events. [2024-06-21 16:41:49,719 INFO L125 PetriNetUnfolderBase]: For 983359/983361 co-relation queries the response was YES. [2024-06-21 16:41:49,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84200 conditions, 9503 events. 6248/9503 cut-off events. For 983359/983361 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 56890 event pairs, 1703 based on Foata normal form. 4/9506 useless extension candidates. Maximal degree in co-relation 84059. Up to 9395 conditions per place. [2024-06-21 16:41:49,856 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 469 selfloop transitions, 36 changer transitions 0/508 dead transitions. [2024-06-21 16:41:49,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 508 transitions, 9112 flow [2024-06-21 16:41:49,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:41:49,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:41:49,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-21 16:41:49,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076655052264808 [2024-06-21 16:41:49,857 INFO L175 Difference]: Start difference. First operand has 292 places, 497 transitions, 7918 flow. Second operand 7 states and 117 transitions. [2024-06-21 16:41:49,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 508 transitions, 9112 flow [2024-06-21 16:41:52,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 508 transitions, 8785 flow, removed 72 selfloop flow, removed 8 redundant places. [2024-06-21 16:41:52,095 INFO L231 Difference]: Finished difference. Result has 291 places, 497 transitions, 7673 flow [2024-06-21 16:41:52,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7593, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7673, PETRI_PLACES=291, PETRI_TRANSITIONS=497} [2024-06-21 16:41:52,096 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 249 predicate places. [2024-06-21 16:41:52,096 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 497 transitions, 7673 flow [2024-06-21 16:41:52,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:52,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:41:52,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:41:52,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 16:41:52,097 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)] === [2024-06-21 16:41:52,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:41:52,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1291837862, now seen corresponding path program 6 times [2024-06-21 16:41:52,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:41:52,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428656041] [2024-06-21 16:41:52,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:41:52,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:41:52,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:41:52,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:41:52,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:41:52,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428656041] [2024-06-21 16:41:52,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428656041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:41:52,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:41:52,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:41:52,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133838795] [2024-06-21 16:41:52,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:41:52,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:41:52,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:41:52,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:41:52,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:41:52,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:41:52,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 497 transitions, 7673 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:52,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:41:52,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:41:52,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:41:54,699 INFO L124 PetriNetUnfolderBase]: 6164/9361 cut-off events. [2024-06-21 16:41:54,699 INFO L125 PetriNetUnfolderBase]: For 955445/955447 co-relation queries the response was YES. [2024-06-21 16:41:54,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81716 conditions, 9361 events. 6164/9361 cut-off events. For 955445/955447 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 55885 event pairs, 1681 based on Foata normal form. 3/9363 useless extension candidates. Maximal degree in co-relation 81575. Up to 9291 conditions per place. [2024-06-21 16:41:54,805 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 479 selfloop transitions, 24 changer transitions 0/506 dead transitions. [2024-06-21 16:41:54,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 506 transitions, 8703 flow [2024-06-21 16:41:54,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:41:54,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:41:54,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-21 16:41:54,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3867595818815331 [2024-06-21 16:41:54,807 INFO L175 Difference]: Start difference. First operand has 291 places, 497 transitions, 7673 flow. Second operand 7 states and 111 transitions. [2024-06-21 16:41:54,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 506 transitions, 8703 flow [2024-06-21 16:41:56,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 506 transitions, 8557 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 16:41:56,602 INFO L231 Difference]: Finished difference. Result has 292 places, 497 transitions, 7581 flow [2024-06-21 16:41:56,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7527, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7581, PETRI_PLACES=292, PETRI_TRANSITIONS=497} [2024-06-21 16:41:56,602 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 250 predicate places. [2024-06-21 16:41:56,602 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 497 transitions, 7581 flow [2024-06-21 16:41:56,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:56,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:41:56,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:41:56,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 16:41:56,603 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)] === [2024-06-21 16:41:56,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:41:56,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1676242923, now seen corresponding path program 4 times [2024-06-21 16:41:56,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:41:56,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145423232] [2024-06-21 16:41:56,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:41:56,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:41:56,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:41:57,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:41:57,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:41:57,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145423232] [2024-06-21 16:41:57,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145423232] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:41:57,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:41:57,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:41:57,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158766471] [2024-06-21 16:41:57,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:41:57,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:41:57,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:41:57,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:41:57,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:41:57,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:41:57,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 497 transitions, 7581 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:41:57,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:41:57,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:41:57,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:41:59,314 INFO L124 PetriNetUnfolderBase]: 6530/9868 cut-off events. [2024-06-21 16:41:59,314 INFO L125 PetriNetUnfolderBase]: For 1122226/1122228 co-relation queries the response was YES. [2024-06-21 16:41:59,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88817 conditions, 9868 events. 6530/9868 cut-off events. For 1122226/1122228 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 58847 event pairs, 1743 based on Foata normal form. 14/9881 useless extension candidates. Maximal degree in co-relation 88675. Up to 9318 conditions per place. [2024-06-21 16:41:59,452 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 478 selfloop transitions, 65 changer transitions 0/546 dead transitions. [2024-06-21 16:41:59,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 546 transitions, 9700 flow [2024-06-21 16:41:59,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:41:59,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:41:59,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 16:41:59,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-21 16:41:59,453 INFO L175 Difference]: Start difference. First operand has 292 places, 497 transitions, 7581 flow. Second operand 8 states and 146 transitions. [2024-06-21 16:41:59,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 546 transitions, 9700 flow [2024-06-21 16:42:02,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 546 transitions, 9556 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-21 16:42:02,064 INFO L231 Difference]: Finished difference. Result has 293 places, 522 transitions, 8084 flow [2024-06-21 16:42:02,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7443, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8084, PETRI_PLACES=293, PETRI_TRANSITIONS=522} [2024-06-21 16:42:02,065 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 251 predicate places. [2024-06-21 16:42:02,065 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 522 transitions, 8084 flow [2024-06-21 16:42:02,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:42:02,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:02,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:02,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 16:42:02,066 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)] === [2024-06-21 16:42:02,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:02,066 INFO L85 PathProgramCache]: Analyzing trace with hash -710883795, now seen corresponding path program 5 times [2024-06-21 16:42:02,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:02,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733471715] [2024-06-21 16:42:02,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:02,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:02,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:02,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:02,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:02,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733471715] [2024-06-21 16:42:02,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733471715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:02,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:02,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:42:02,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340205870] [2024-06-21 16:42:02,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:02,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:42:02,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:02,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:42:02,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:42:02,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:42:02,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 522 transitions, 8084 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:42:02,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:02,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:42:02,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:04,800 INFO L124 PetriNetUnfolderBase]: 6512/9847 cut-off events. [2024-06-21 16:42:04,800 INFO L125 PetriNetUnfolderBase]: For 1094621/1094623 co-relation queries the response was YES. [2024-06-21 16:42:04,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88589 conditions, 9847 events. 6512/9847 cut-off events. For 1094621/1094623 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 58772 event pairs, 1751 based on Foata normal form. 14/9860 useless extension candidates. Maximal degree in co-relation 88444. Up to 9593 conditions per place. [2024-06-21 16:42:04,924 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 496 selfloop transitions, 44 changer transitions 0/543 dead transitions. [2024-06-21 16:42:04,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 543 transitions, 9628 flow [2024-06-21 16:42:04,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:42:04,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:42:04,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 16:42:04,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-21 16:42:04,925 INFO L175 Difference]: Start difference. First operand has 293 places, 522 transitions, 8084 flow. Second operand 8 states and 139 transitions. [2024-06-21 16:42:04,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 543 transitions, 9628 flow [2024-06-21 16:42:06,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 543 transitions, 9416 flow, removed 95 selfloop flow, removed 2 redundant places. [2024-06-21 16:42:06,695 INFO L231 Difference]: Finished difference. Result has 300 places, 525 transitions, 8083 flow [2024-06-21 16:42:06,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7890, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8083, PETRI_PLACES=300, PETRI_TRANSITIONS=525} [2024-06-21 16:42:06,696 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 258 predicate places. [2024-06-21 16:42:06,696 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 525 transitions, 8083 flow [2024-06-21 16:42:06,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:42:06,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:06,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:06,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 16:42:06,697 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)] === [2024-06-21 16:42:06,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:06,697 INFO L85 PathProgramCache]: Analyzing trace with hash -710437922, now seen corresponding path program 1 times [2024-06-21 16:42:06,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:06,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838914088] [2024-06-21 16:42:06,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:06,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:06,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:07,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:07,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:07,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838914088] [2024-06-21 16:42:07,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838914088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:07,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:07,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:42:07,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586861806] [2024-06-21 16:42:07,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:07,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:42:07,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:07,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:42:07,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:42:07,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:42:07,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 525 transitions, 8083 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:42:07,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:07,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:42:07,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:09,415 INFO L124 PetriNetUnfolderBase]: 6506/9837 cut-off events. [2024-06-21 16:42:09,416 INFO L125 PetriNetUnfolderBase]: For 1076833/1076833 co-relation queries the response was YES. [2024-06-21 16:42:09,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87481 conditions, 9837 events. 6506/9837 cut-off events. For 1076833/1076833 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 58634 event pairs, 1777 based on Foata normal form. 2/9838 useless extension candidates. Maximal degree in co-relation 87333. Up to 9787 conditions per place. [2024-06-21 16:42:09,563 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 519 selfloop transitions, 18 changer transitions 0/540 dead transitions. [2024-06-21 16:42:09,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 540 transitions, 9247 flow [2024-06-21 16:42:09,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:42:09,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:42:09,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-21 16:42:09,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-21 16:42:09,565 INFO L175 Difference]: Start difference. First operand has 300 places, 525 transitions, 8083 flow. Second operand 8 states and 120 transitions. [2024-06-21 16:42:09,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 540 transitions, 9247 flow [2024-06-21 16:42:11,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 540 transitions, 9041 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-21 16:42:11,935 INFO L231 Difference]: Finished difference. Result has 302 places, 528 transitions, 7985 flow [2024-06-21 16:42:11,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7877, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7985, PETRI_PLACES=302, PETRI_TRANSITIONS=528} [2024-06-21 16:42:11,936 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 260 predicate places. [2024-06-21 16:42:11,936 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 528 transitions, 7985 flow [2024-06-21 16:42:11,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:42:11,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:11,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:11,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 16:42:11,937 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)] === [2024-06-21 16:42:11,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:11,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1676231763, now seen corresponding path program 6 times [2024-06-21 16:42:11,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:11,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202749081] [2024-06-21 16:42:11,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:11,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:11,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:12,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:12,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:12,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202749081] [2024-06-21 16:42:12,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202749081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:12,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:12,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:42:12,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123162227] [2024-06-21 16:42:12,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:12,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:42:12,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:12,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:42:12,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:42:12,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:42:12,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 528 transitions, 7985 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:42:12,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:12,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:42:12,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:14,754 INFO L124 PetriNetUnfolderBase]: 6470/9791 cut-off events. [2024-06-21 16:42:14,754 INFO L125 PetriNetUnfolderBase]: For 1091539/1091541 co-relation queries the response was YES. [2024-06-21 16:42:14,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85824 conditions, 9791 events. 6470/9791 cut-off events. For 1091539/1091541 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 58371 event pairs, 1708 based on Foata normal form. 14/9804 useless extension candidates. Maximal degree in co-relation 85675. Up to 9284 conditions per place. [2024-06-21 16:42:14,888 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 475 selfloop transitions, 72 changer transitions 0/550 dead transitions. [2024-06-21 16:42:14,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 550 transitions, 9482 flow [2024-06-21 16:42:14,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:42:14,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:42:14,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 16:42:14,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-21 16:42:14,889 INFO L175 Difference]: Start difference. First operand has 302 places, 528 transitions, 7985 flow. Second operand 8 states and 145 transitions. [2024-06-21 16:42:14,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 550 transitions, 9482 flow [2024-06-21 16:42:17,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 550 transitions, 9392 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-21 16:42:17,115 INFO L231 Difference]: Finished difference. Result has 305 places, 529 transitions, 8062 flow [2024-06-21 16:42:17,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7895, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8062, PETRI_PLACES=305, PETRI_TRANSITIONS=529} [2024-06-21 16:42:17,116 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 263 predicate places. [2024-06-21 16:42:17,116 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 529 transitions, 8062 flow [2024-06-21 16:42:17,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:42:17,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:17,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:17,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 16:42:17,117 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)] === [2024-06-21 16:42:17,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:17,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1676231422, now seen corresponding path program 4 times [2024-06-21 16:42:17,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:17,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714432474] [2024-06-21 16:42:17,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:17,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:17,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:17,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:17,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:17,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714432474] [2024-06-21 16:42:17,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714432474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:17,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:17,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:42:17,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033474663] [2024-06-21 16:42:17,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:17,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:42:17,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:17,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:42:17,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:42:17,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:42:17,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 529 transitions, 8062 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:42:17,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:17,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:42:17,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:20,098 INFO L124 PetriNetUnfolderBase]: 6441/9746 cut-off events. [2024-06-21 16:42:20,099 INFO L125 PetriNetUnfolderBase]: For 1078799/1078801 co-relation queries the response was YES. [2024-06-21 16:42:20,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85812 conditions, 9746 events. 6441/9746 cut-off events. For 1078799/1078801 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 58073 event pairs, 1770 based on Foata normal form. 6/9751 useless extension candidates. Maximal degree in co-relation 85662. Up to 9626 conditions per place. [2024-06-21 16:42:20,210 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 496 selfloop transitions, 43 changer transitions 0/542 dead transitions. [2024-06-21 16:42:20,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 542 transitions, 9184 flow [2024-06-21 16:42:20,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:42:20,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:42:20,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 16:42:20,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-21 16:42:20,211 INFO L175 Difference]: Start difference. First operand has 305 places, 529 transitions, 8062 flow. Second operand 8 states and 133 transitions. [2024-06-21 16:42:20,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 542 transitions, 9184 flow [2024-06-21 16:42:22,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 542 transitions, 8920 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-21 16:42:22,436 INFO L231 Difference]: Finished difference. Result has 307 places, 529 transitions, 7892 flow [2024-06-21 16:42:22,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7798, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7892, PETRI_PLACES=307, PETRI_TRANSITIONS=529} [2024-06-21 16:42:22,436 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 265 predicate places. [2024-06-21 16:42:22,437 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 529 transitions, 7892 flow [2024-06-21 16:42:22,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:42:22,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:22,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:22,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 16:42:22,437 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)] === [2024-06-21 16:42:22,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:22,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1939621723, now seen corresponding path program 1 times [2024-06-21 16:42:22,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:22,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743284133] [2024-06-21 16:42:22,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:22,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:22,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:22,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:22,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:22,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743284133] [2024-06-21 16:42:22,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743284133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:22,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:22,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:42:22,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698470521] [2024-06-21 16:42:22,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:22,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:42:22,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:22,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:42:22,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:42:23,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:42:23,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 529 transitions, 7892 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:42:23,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:23,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:42:23,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:25,298 INFO L124 PetriNetUnfolderBase]: 6471/9786 cut-off events. [2024-06-21 16:42:25,299 INFO L125 PetriNetUnfolderBase]: For 1107696/1107696 co-relation queries the response was YES. [2024-06-21 16:42:25,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85109 conditions, 9786 events. 6471/9786 cut-off events. For 1107696/1107696 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 58273 event pairs, 1761 based on Foata normal form. 6/9791 useless extension candidates. Maximal degree in co-relation 84959. Up to 9565 conditions per place. [2024-06-21 16:42:25,420 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 511 selfloop transitions, 46 changer transitions 0/560 dead transitions. [2024-06-21 16:42:25,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 560 transitions, 9327 flow [2024-06-21 16:42:25,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:42:25,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:42:25,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 16:42:25,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-21 16:42:25,422 INFO L175 Difference]: Start difference. First operand has 307 places, 529 transitions, 7892 flow. Second operand 8 states and 141 transitions. [2024-06-21 16:42:25,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 560 transitions, 9327 flow [2024-06-21 16:42:27,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 560 transitions, 9201 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-21 16:42:27,258 INFO L231 Difference]: Finished difference. Result has 309 places, 533 transitions, 7924 flow [2024-06-21 16:42:27,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7766, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7924, PETRI_PLACES=309, PETRI_TRANSITIONS=533} [2024-06-21 16:42:27,258 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 267 predicate places. [2024-06-21 16:42:27,259 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 533 transitions, 7924 flow [2024-06-21 16:42:27,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:42:27,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:27,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:27,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 16:42:27,263 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)] === [2024-06-21 16:42:27,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:27,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1482655611, now seen corresponding path program 2 times [2024-06-21 16:42:27,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:27,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873189754] [2024-06-21 16:42:27,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:27,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:27,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:27,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:27,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:27,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873189754] [2024-06-21 16:42:27,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873189754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:27,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:27,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:42:27,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048857236] [2024-06-21 16:42:27,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:27,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:42:27,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:27,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:42:27,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:42:27,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:42:27,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 533 transitions, 7924 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) [2024-06-21 16:42:27,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:27,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:42:27,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:29,912 INFO L124 PetriNetUnfolderBase]: 6501/9828 cut-off events. [2024-06-21 16:42:29,913 INFO L125 PetriNetUnfolderBase]: For 1133002/1133002 co-relation queries the response was YES. [2024-06-21 16:42:30,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85658 conditions, 9828 events. 6501/9828 cut-off events. For 1133002/1133002 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 58525 event pairs, 1746 based on Foata normal form. 6/9833 useless extension candidates. Maximal degree in co-relation 85507. Up to 9587 conditions per place. [2024-06-21 16:42:30,052 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 507 selfloop transitions, 55 changer transitions 0/565 dead transitions. [2024-06-21 16:42:30,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 565 transitions, 9378 flow [2024-06-21 16:42:30,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:42:30,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:42:30,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-21 16:42:30,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4564459930313589 [2024-06-21 16:42:30,053 INFO L175 Difference]: Start difference. First operand has 309 places, 533 transitions, 7924 flow. Second operand 7 states and 131 transitions. [2024-06-21 16:42:30,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 565 transitions, 9378 flow [2024-06-21 16:42:32,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 565 transitions, 9248 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 16:42:32,402 INFO L231 Difference]: Finished difference. Result has 310 places, 537 transitions, 7980 flow [2024-06-21 16:42:32,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7804, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7980, PETRI_PLACES=310, PETRI_TRANSITIONS=537} [2024-06-21 16:42:32,402 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 268 predicate places. [2024-06-21 16:42:32,403 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 537 transitions, 7980 flow [2024-06-21 16:42:32,403 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) [2024-06-21 16:42:32,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:32,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:32,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 16:42:32,405 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)] === [2024-06-21 16:42:32,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:32,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1980778451, now seen corresponding path program 3 times [2024-06-21 16:42:32,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:32,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345588914] [2024-06-21 16:42:32,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:32,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:32,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:32,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:32,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:32,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345588914] [2024-06-21 16:42:32,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345588914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:32,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:32,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:42:32,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448214465] [2024-06-21 16:42:32,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:32,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:42:32,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:32,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:42:32,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:42:33,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:42:33,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 537 transitions, 7980 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:42:33,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:33,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:42:33,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:35,389 INFO L124 PetriNetUnfolderBase]: 6531/9872 cut-off events. [2024-06-21 16:42:35,390 INFO L125 PetriNetUnfolderBase]: For 1133749/1133751 co-relation queries the response was YES. [2024-06-21 16:42:35,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85892 conditions, 9872 events. 6531/9872 cut-off events. For 1133749/1133751 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 58823 event pairs, 1782 based on Foata normal form. 6/9877 useless extension candidates. Maximal degree in co-relation 85740. Up to 9609 conditions per place. [2024-06-21 16:42:35,524 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 506 selfloop transitions, 58 changer transitions 0/567 dead transitions. [2024-06-21 16:42:35,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 567 transitions, 9440 flow [2024-06-21 16:42:35,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:42:35,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:42:35,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 16:42:35,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-21 16:42:35,525 INFO L175 Difference]: Start difference. First operand has 310 places, 537 transitions, 7980 flow. Second operand 8 states and 140 transitions. [2024-06-21 16:42:35,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 567 transitions, 9440 flow [2024-06-21 16:42:37,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 567 transitions, 9295 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 16:42:37,770 INFO L231 Difference]: Finished difference. Result has 313 places, 541 transitions, 8025 flow [2024-06-21 16:42:37,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7843, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8025, PETRI_PLACES=313, PETRI_TRANSITIONS=541} [2024-06-21 16:42:37,771 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 271 predicate places. [2024-06-21 16:42:37,771 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 541 transitions, 8025 flow [2024-06-21 16:42:37,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:42:37,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:37,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:37,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 16:42:37,772 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)] === [2024-06-21 16:42:37,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:37,772 INFO L85 PathProgramCache]: Analyzing trace with hash -2046374885, now seen corresponding path program 4 times [2024-06-21 16:42:37,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:37,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696177988] [2024-06-21 16:42:37,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:37,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:37,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:38,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:38,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:38,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696177988] [2024-06-21 16:42:38,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696177988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:38,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:38,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:42:38,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135793405] [2024-06-21 16:42:38,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:38,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:42:38,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:38,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:42:38,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:42:38,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:42:38,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 541 transitions, 8025 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:42:38,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:38,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:42:38,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:40,801 INFO L124 PetriNetUnfolderBase]: 6513/9848 cut-off events. [2024-06-21 16:42:40,801 INFO L125 PetriNetUnfolderBase]: For 1136780/1136782 co-relation queries the response was YES. [2024-06-21 16:42:40,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85505 conditions, 9848 events. 6513/9848 cut-off events. For 1136780/1136782 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 58627 event pairs, 1765 based on Foata normal form. 6/9853 useless extension candidates. Maximal degree in co-relation 85353. Up to 9598 conditions per place. [2024-06-21 16:42:40,925 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 507 selfloop transitions, 60 changer transitions 0/570 dead transitions. [2024-06-21 16:42:40,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 570 transitions, 9278 flow [2024-06-21 16:42:40,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:42:40,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:42:40,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 16:42:40,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 16:42:40,926 INFO L175 Difference]: Start difference. First operand has 313 places, 541 transitions, 8025 flow. Second operand 9 states and 153 transitions. [2024-06-21 16:42:40,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 570 transitions, 9278 flow [2024-06-21 16:42:42,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 570 transitions, 9155 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 16:42:42,950 INFO L231 Difference]: Finished difference. Result has 317 places, 541 transitions, 8030 flow [2024-06-21 16:42:42,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7902, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8030, PETRI_PLACES=317, PETRI_TRANSITIONS=541} [2024-06-21 16:42:42,951 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 275 predicate places. [2024-06-21 16:42:42,951 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 541 transitions, 8030 flow [2024-06-21 16:42:42,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:42:42,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:42,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:42,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 16:42:42,952 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)] === [2024-06-21 16:42:42,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:42,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1689591678, now seen corresponding path program 1 times [2024-06-21 16:42:42,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:42,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256356780] [2024-06-21 16:42:42,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:42,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:42,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:43,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:43,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:43,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256356780] [2024-06-21 16:42:43,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256356780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:43,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:43,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:42:43,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552786335] [2024-06-21 16:42:43,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:43,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:42:43,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:43,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:42:43,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:42:43,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:42:43,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 541 transitions, 8030 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:43,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:43,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:42:43,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:45,946 INFO L124 PetriNetUnfolderBase]: 6508/9839 cut-off events. [2024-06-21 16:42:45,946 INFO L125 PetriNetUnfolderBase]: For 1140423/1140423 co-relation queries the response was YES. [2024-06-21 16:42:46,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85518 conditions, 9839 events. 6508/9839 cut-off events. For 1140423/1140423 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 58523 event pairs, 1764 based on Foata normal form. 2/9840 useless extension candidates. Maximal degree in co-relation 85364. Up to 9791 conditions per place. [2024-06-21 16:42:46,097 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 535 selfloop transitions, 17 changer transitions 0/555 dead transitions. [2024-06-21 16:42:46,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 555 transitions, 9200 flow [2024-06-21 16:42:46,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:42:46,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:42:46,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-21 16:42:46,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3628048780487805 [2024-06-21 16:42:46,107 INFO L175 Difference]: Start difference. First operand has 317 places, 541 transitions, 8030 flow. Second operand 8 states and 119 transitions. [2024-06-21 16:42:46,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 555 transitions, 9200 flow [2024-06-21 16:42:48,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 555 transitions, 8988 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-21 16:42:48,803 INFO L231 Difference]: Finished difference. Result has 315 places, 543 transitions, 7897 flow [2024-06-21 16:42:48,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7818, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7897, PETRI_PLACES=315, PETRI_TRANSITIONS=543} [2024-06-21 16:42:48,804 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 273 predicate places. [2024-06-21 16:42:48,804 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 543 transitions, 7897 flow [2024-06-21 16:42:48,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:48,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:48,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:48,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 16:42:48,805 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)] === [2024-06-21 16:42:48,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:48,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1892730082, now seen corresponding path program 1 times [2024-06-21 16:42:48,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:48,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440107220] [2024-06-21 16:42:48,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:48,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:48,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:49,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:49,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:49,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440107220] [2024-06-21 16:42:49,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440107220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:49,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:49,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:42:49,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539946115] [2024-06-21 16:42:49,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:49,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:42:49,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:49,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:42:49,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:42:49,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:42:49,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 543 transitions, 7897 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:49,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:49,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:42:49,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:51,966 INFO L124 PetriNetUnfolderBase]: 6766/10242 cut-off events. [2024-06-21 16:42:51,967 INFO L125 PetriNetUnfolderBase]: For 1306237/1306245 co-relation queries the response was YES. [2024-06-21 16:42:52,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90562 conditions, 10242 events. 6766/10242 cut-off events. For 1306237/1306245 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 61513 event pairs, 1263 based on Foata normal form. 30/10271 useless extension candidates. Maximal degree in co-relation 90408. Up to 7173 conditions per place. [2024-06-21 16:42:52,114 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 394 selfloop transitions, 202 changer transitions 0/599 dead transitions. [2024-06-21 16:42:52,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 599 transitions, 9756 flow [2024-06-21 16:42:52,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:42:52,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:42:52,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-21 16:42:52,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4905149051490515 [2024-06-21 16:42:52,116 INFO L175 Difference]: Start difference. First operand has 315 places, 543 transitions, 7897 flow. Second operand 9 states and 181 transitions. [2024-06-21 16:42:52,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 599 transitions, 9756 flow [2024-06-21 16:42:55,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 599 transitions, 9693 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 16:42:55,080 INFO L231 Difference]: Finished difference. Result has 319 places, 551 transitions, 8581 flow [2024-06-21 16:42:55,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7834, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8581, PETRI_PLACES=319, PETRI_TRANSITIONS=551} [2024-06-21 16:42:55,081 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 277 predicate places. [2024-06-21 16:42:55,081 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 551 transitions, 8581 flow [2024-06-21 16:42:55,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:55,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:55,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:55,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 16:42:55,082 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)] === [2024-06-21 16:42:55,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:55,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1892969402, now seen corresponding path program 1 times [2024-06-21 16:42:55,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:55,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179176611] [2024-06-21 16:42:55,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:55,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:55,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:55,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:55,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:55,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179176611] [2024-06-21 16:42:55,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179176611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:55,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:55,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:42:55,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653781610] [2024-06-21 16:42:55,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:55,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:42:55,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:55,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:42:55,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:42:55,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:42:55,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 551 transitions, 8581 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:55,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:55,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:42:55,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:58,542 INFO L124 PetriNetUnfolderBase]: 6914/10447 cut-off events. [2024-06-21 16:42:58,542 INFO L125 PetriNetUnfolderBase]: For 1352834/1352842 co-relation queries the response was YES. [2024-06-21 16:42:58,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95178 conditions, 10447 events. 6914/10447 cut-off events. For 1352834/1352842 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 62955 event pairs, 1412 based on Foata normal form. 20/10466 useless extension candidates. Maximal degree in co-relation 95022. Up to 7722 conditions per place. [2024-06-21 16:42:58,683 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 394 selfloop transitions, 215 changer transitions 0/612 dead transitions. [2024-06-21 16:42:58,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 612 transitions, 10703 flow [2024-06-21 16:42:58,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:42:58,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:42:58,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 217 transitions. [2024-06-21 16:42:58,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4811529933481153 [2024-06-21 16:42:58,685 INFO L175 Difference]: Start difference. First operand has 319 places, 551 transitions, 8581 flow. Second operand 11 states and 217 transitions. [2024-06-21 16:42:58,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 612 transitions, 10703 flow [2024-06-21 16:43:01,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 612 transitions, 10433 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-21 16:43:01,701 INFO L231 Difference]: Finished difference. Result has 326 places, 562 transitions, 8999 flow [2024-06-21 16:43:01,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8311, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8999, PETRI_PLACES=326, PETRI_TRANSITIONS=562} [2024-06-21 16:43:01,702 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 284 predicate places. [2024-06-21 16:43:01,702 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 562 transitions, 8999 flow [2024-06-21 16:43:01,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:01,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:01,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:43:01,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 16:43:01,702 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)] === [2024-06-21 16:43:01,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:01,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1892969092, now seen corresponding path program 2 times [2024-06-21 16:43:01,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:01,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104658750] [2024-06-21 16:43:01,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:01,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:01,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:02,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:43:02,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:02,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104658750] [2024-06-21 16:43:02,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104658750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:02,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:02,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:43:02,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004343149] [2024-06-21 16:43:02,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:02,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:43:02,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:02,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:43:02,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:43:02,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:43:02,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 562 transitions, 8999 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:02,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:02,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:43:02,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:05,290 INFO L124 PetriNetUnfolderBase]: 6994/10571 cut-off events. [2024-06-21 16:43:05,290 INFO L125 PetriNetUnfolderBase]: For 1429411/1429419 co-relation queries the response was YES. [2024-06-21 16:43:05,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99377 conditions, 10571 events. 6994/10571 cut-off events. For 1429411/1429419 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 63708 event pairs, 1482 based on Foata normal form. 30/10600 useless extension candidates. Maximal degree in co-relation 99218. Up to 9141 conditions per place. [2024-06-21 16:43:05,427 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 417 selfloop transitions, 187 changer transitions 0/607 dead transitions. [2024-06-21 16:43:05,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 607 transitions, 10535 flow [2024-06-21 16:43:05,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:43:05,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:43:05,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-21 16:43:05,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585365853658537 [2024-06-21 16:43:05,429 INFO L175 Difference]: Start difference. First operand has 326 places, 562 transitions, 8999 flow. Second operand 10 states and 188 transitions. [2024-06-21 16:43:05,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 607 transitions, 10535 flow [2024-06-21 16:43:08,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 607 transitions, 10223 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-21 16:43:08,817 INFO L231 Difference]: Finished difference. Result has 330 places, 566 transitions, 9216 flow [2024-06-21 16:43:08,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8687, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9216, PETRI_PLACES=330, PETRI_TRANSITIONS=566} [2024-06-21 16:43:08,818 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 288 predicate places. [2024-06-21 16:43:08,818 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 566 transitions, 9216 flow [2024-06-21 16:43:08,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:08,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:08,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:43:08,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 16:43:08,819 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)] === [2024-06-21 16:43:08,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:08,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1764371570, now seen corresponding path program 1 times [2024-06-21 16:43:08,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:08,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526291257] [2024-06-21 16:43:08,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:08,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:08,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:09,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:43:09,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:09,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526291257] [2024-06-21 16:43:09,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526291257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:09,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:09,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:43:09,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632486839] [2024-06-21 16:43:09,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:09,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:43:09,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:09,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:43:09,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:43:09,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:43:09,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 566 transitions, 9216 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:43:09,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:09,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:43:09,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:12,280 INFO L124 PetriNetUnfolderBase]: 7156/10805 cut-off events. [2024-06-21 16:43:12,280 INFO L125 PetriNetUnfolderBase]: For 1488343/1488345 co-relation queries the response was YES. [2024-06-21 16:43:12,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102876 conditions, 10805 events. 7156/10805 cut-off events. For 1488343/1488345 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 65209 event pairs, 1505 based on Foata normal form. 20/10824 useless extension candidates. Maximal degree in co-relation 102715. Up to 8532 conditions per place. [2024-06-21 16:43:12,428 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 439 selfloop transitions, 172 changer transitions 0/614 dead transitions. [2024-06-21 16:43:12,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 614 transitions, 11228 flow [2024-06-21 16:43:12,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:43:12,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:43:12,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 16:43:12,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-21 16:43:12,429 INFO L175 Difference]: Start difference. First operand has 330 places, 566 transitions, 9216 flow. Second operand 8 states and 156 transitions. [2024-06-21 16:43:12,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 614 transitions, 11228 flow [2024-06-21 16:43:15,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 614 transitions, 10809 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-21 16:43:15,074 INFO L231 Difference]: Finished difference. Result has 331 places, 580 transitions, 9493 flow [2024-06-21 16:43:15,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8797, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9493, PETRI_PLACES=331, PETRI_TRANSITIONS=580} [2024-06-21 16:43:15,075 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 289 predicate places. [2024-06-21 16:43:15,075 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 580 transitions, 9493 flow [2024-06-21 16:43:15,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:43:15,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:15,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:43:15,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 16:43:15,076 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)] === [2024-06-21 16:43:15,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:15,076 INFO L85 PathProgramCache]: Analyzing trace with hash -2106418536, now seen corresponding path program 2 times [2024-06-21 16:43:15,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:15,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132544070] [2024-06-21 16:43:15,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:15,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:15,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:15,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:43:15,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:15,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132544070] [2024-06-21 16:43:15,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132544070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:15,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:15,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:43:15,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464229702] [2024-06-21 16:43:15,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:15,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:43:15,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:15,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:43:15,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:43:15,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:43:15,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 580 transitions, 9493 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:43:15,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:15,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:43:15,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:18,738 INFO L124 PetriNetUnfolderBase]: 7186/10843 cut-off events. [2024-06-21 16:43:18,738 INFO L125 PetriNetUnfolderBase]: For 1465815/1465817 co-relation queries the response was YES. [2024-06-21 16:43:18,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103866 conditions, 10843 events. 7186/10843 cut-off events. For 1465815/1465817 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 65329 event pairs, 1556 based on Foata normal form. 8/10850 useless extension candidates. Maximal degree in co-relation 103703. Up to 8542 conditions per place. [2024-06-21 16:43:18,879 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 411 selfloop transitions, 196 changer transitions 0/610 dead transitions. [2024-06-21 16:43:18,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 610 transitions, 11245 flow [2024-06-21 16:43:18,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:43:18,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:43:18,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 16:43:18,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603658536585366 [2024-06-21 16:43:18,880 INFO L175 Difference]: Start difference. First operand has 331 places, 580 transitions, 9493 flow. Second operand 8 states and 151 transitions. [2024-06-21 16:43:18,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 610 transitions, 11245 flow [2024-06-21 16:43:22,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 610 transitions, 11016 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-21 16:43:22,105 INFO L231 Difference]: Finished difference. Result has 335 places, 584 transitions, 9756 flow [2024-06-21 16:43:22,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9270, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9756, PETRI_PLACES=335, PETRI_TRANSITIONS=584} [2024-06-21 16:43:22,106 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 293 predicate places. [2024-06-21 16:43:22,106 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 584 transitions, 9756 flow [2024-06-21 16:43:22,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:43:22,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:22,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:43:22,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 16:43:22,106 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)] === [2024-06-21 16:43:22,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:22,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1075046862, now seen corresponding path program 3 times [2024-06-21 16:43:22,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:22,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895160574] [2024-06-21 16:43:22,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:22,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:22,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:22,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:43:22,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:22,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895160574] [2024-06-21 16:43:22,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895160574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:22,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:22,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:43:22,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275042942] [2024-06-21 16:43:22,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:22,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:43:22,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:22,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:43:22,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:43:22,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:43:22,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 584 transitions, 9756 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:43:22,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:22,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:43:22,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:25,951 INFO L124 PetriNetUnfolderBase]: 7168/10819 cut-off events. [2024-06-21 16:43:25,951 INFO L125 PetriNetUnfolderBase]: For 1478508/1478510 co-relation queries the response was YES. [2024-06-21 16:43:26,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103424 conditions, 10819 events. 7168/10819 cut-off events. For 1478508/1478510 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 65189 event pairs, 1548 based on Foata normal form. 8/10826 useless extension candidates. Maximal degree in co-relation 103260. Up to 8537 conditions per place. [2024-06-21 16:43:26,105 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 421 selfloop transitions, 188 changer transitions 0/612 dead transitions. [2024-06-21 16:43:26,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 612 transitions, 11450 flow [2024-06-21 16:43:26,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:43:26,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:43:26,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 16:43:26,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-21 16:43:26,106 INFO L175 Difference]: Start difference. First operand has 335 places, 584 transitions, 9756 flow. Second operand 8 states and 152 transitions. [2024-06-21 16:43:26,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 612 transitions, 11450 flow [2024-06-21 16:43:29,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 612 transitions, 11069 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 16:43:29,437 INFO L231 Difference]: Finished difference. Result has 338 places, 585 transitions, 9778 flow [2024-06-21 16:43:29,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9376, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9778, PETRI_PLACES=338, PETRI_TRANSITIONS=585} [2024-06-21 16:43:29,437 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 296 predicate places. [2024-06-21 16:43:29,438 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 585 transitions, 9778 flow [2024-06-21 16:43:29,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:43:29,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:29,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:43:29,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 16:43:29,438 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)] === [2024-06-21 16:43:29,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:29,439 INFO L85 PathProgramCache]: Analyzing trace with hash 2092661748, now seen corresponding path program 2 times [2024-06-21 16:43:29,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:29,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633928821] [2024-06-21 16:43:29,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:29,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:29,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:30,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:43:30,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:30,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633928821] [2024-06-21 16:43:30,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633928821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:30,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:30,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:43:30,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069530847] [2024-06-21 16:43:30,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:30,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:43:30,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:30,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:43:30,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:43:30,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:43:30,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 585 transitions, 9778 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:30,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:30,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:43:30,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:33,504 INFO L124 PetriNetUnfolderBase]: 7246/10930 cut-off events. [2024-06-21 16:43:33,504 INFO L125 PetriNetUnfolderBase]: For 1535076/1535078 co-relation queries the response was YES. [2024-06-21 16:43:33,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104510 conditions, 10930 events. 7246/10930 cut-off events. For 1535076/1535078 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 65864 event pairs, 1540 based on Foata normal form. 14/10943 useless extension candidates. Maximal degree in co-relation 104345. Up to 8583 conditions per place. [2024-06-21 16:43:33,650 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 414 selfloop transitions, 204 changer transitions 0/621 dead transitions. [2024-06-21 16:43:33,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 621 transitions, 11593 flow [2024-06-21 16:43:33,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:43:33,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:43:33,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 16:43:33,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-21 16:43:33,653 INFO L175 Difference]: Start difference. First operand has 338 places, 585 transitions, 9778 flow. Second operand 9 states and 170 transitions. [2024-06-21 16:43:33,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 621 transitions, 11593 flow [2024-06-21 16:43:37,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 621 transitions, 11260 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 16:43:37,207 INFO L231 Difference]: Finished difference. Result has 342 places, 591 transitions, 9979 flow [2024-06-21 16:43:37,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9445, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9979, PETRI_PLACES=342, PETRI_TRANSITIONS=591} [2024-06-21 16:43:37,208 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 300 predicate places. [2024-06-21 16:43:37,208 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 591 transitions, 9979 flow [2024-06-21 16:43:37,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:37,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:37,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:43:37,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 16:43:37,208 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)] === [2024-06-21 16:43:37,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:37,209 INFO L85 PathProgramCache]: Analyzing trace with hash -2106768464, now seen corresponding path program 3 times [2024-06-21 16:43:37,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:37,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040670344] [2024-06-21 16:43:37,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:37,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:37,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:38,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:43:38,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:38,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040670344] [2024-06-21 16:43:38,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040670344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:38,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:38,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:43:38,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432096775] [2024-06-21 16:43:38,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:38,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:43:38,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:38,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:43:38,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:43:38,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:43:38,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 591 transitions, 9979 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:38,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:38,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:43:38,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:41,227 INFO L124 PetriNetUnfolderBase]: 7306/11014 cut-off events. [2024-06-21 16:43:41,228 INFO L125 PetriNetUnfolderBase]: For 1570358/1570360 co-relation queries the response was YES. [2024-06-21 16:43:41,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105925 conditions, 11014 events. 7306/11014 cut-off events. For 1570358/1570360 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 66395 event pairs, 1539 based on Foata normal form. 14/11027 useless extension candidates. Maximal degree in co-relation 105759. Up to 8682 conditions per place. [2024-06-21 16:43:41,381 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 430 selfloop transitions, 196 changer transitions 0/629 dead transitions. [2024-06-21 16:43:41,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 629 transitions, 11836 flow [2024-06-21 16:43:41,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:43:41,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:43:41,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 16:43:41,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46883468834688347 [2024-06-21 16:43:41,382 INFO L175 Difference]: Start difference. First operand has 342 places, 591 transitions, 9979 flow. Second operand 9 states and 173 transitions. [2024-06-21 16:43:41,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 629 transitions, 11836 flow [2024-06-21 16:43:44,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 629 transitions, 11404 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-21 16:43:44,881 INFO L231 Difference]: Finished difference. Result has 345 places, 597 transitions, 10077 flow [2024-06-21 16:43:44,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9547, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10077, PETRI_PLACES=345, PETRI_TRANSITIONS=597} [2024-06-21 16:43:44,881 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 303 predicate places. [2024-06-21 16:43:44,882 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 597 transitions, 10077 flow [2024-06-21 16:43:44,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:44,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:44,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:43:44,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 16:43:44,882 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)] === [2024-06-21 16:43:44,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:44,883 INFO L85 PathProgramCache]: Analyzing trace with hash -2106779004, now seen corresponding path program 3 times [2024-06-21 16:43:44,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:44,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633849036] [2024-06-21 16:43:44,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:44,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:44,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:45,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:43:45,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:45,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633849036] [2024-06-21 16:43:45,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633849036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:45,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:45,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:43:45,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926074781] [2024-06-21 16:43:45,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:45,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:43:45,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:45,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:43:45,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:43:46,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:43:46,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 597 transitions, 10077 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:46,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:46,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:43:46,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:49,079 INFO L124 PetriNetUnfolderBase]: 7427/11199 cut-off events. [2024-06-21 16:43:49,079 INFO L125 PetriNetUnfolderBase]: For 1668146/1668148 co-relation queries the response was YES. [2024-06-21 16:43:49,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108354 conditions, 11199 events. 7427/11199 cut-off events. For 1668146/1668148 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 67597 event pairs, 1596 based on Foata normal form. 23/11221 useless extension candidates. Maximal degree in co-relation 108187. Up to 9997 conditions per place. [2024-06-21 16:43:49,242 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 448 selfloop transitions, 190 changer transitions 0/641 dead transitions. [2024-06-21 16:43:49,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 641 transitions, 12363 flow [2024-06-21 16:43:49,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:43:49,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:43:49,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 16:43:49,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 16:43:49,244 INFO L175 Difference]: Start difference. First operand has 345 places, 597 transitions, 10077 flow. Second operand 9 states and 164 transitions. [2024-06-21 16:43:49,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 641 transitions, 12363 flow [2024-06-21 16:43:53,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 641 transitions, 11890 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-21 16:43:53,264 INFO L231 Difference]: Finished difference. Result has 349 places, 613 transitions, 10432 flow [2024-06-21 16:43:53,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9604, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10432, PETRI_PLACES=349, PETRI_TRANSITIONS=613} [2024-06-21 16:43:53,265 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 307 predicate places. [2024-06-21 16:43:53,265 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 613 transitions, 10432 flow [2024-06-21 16:43:53,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:53,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:53,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:43:53,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 16:43:53,266 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)] === [2024-06-21 16:43:53,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:53,266 INFO L85 PathProgramCache]: Analyzing trace with hash 2092305558, now seen corresponding path program 4 times [2024-06-21 16:43:53,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:53,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835549034] [2024-06-21 16:43:53,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:53,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:53,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:54,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:43:54,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:54,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835549034] [2024-06-21 16:43:54,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835549034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:54,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:54,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:43:54,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679670565] [2024-06-21 16:43:54,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:54,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:43:54,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:54,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:43:54,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:43:54,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:43:54,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 613 transitions, 10432 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:54,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:54,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:43:54,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:57,458 INFO L124 PetriNetUnfolderBase]: 7447/11227 cut-off events. [2024-06-21 16:43:57,459 INFO L125 PetriNetUnfolderBase]: For 1649071/1649073 co-relation queries the response was YES. [2024-06-21 16:43:57,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108957 conditions, 11227 events. 7447/11227 cut-off events. For 1649071/1649073 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 67907 event pairs, 1540 based on Foata normal form. 6/11232 useless extension candidates. Maximal degree in co-relation 108787. Up to 8786 conditions per place. [2024-06-21 16:43:57,637 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 438 selfloop transitions, 212 changer transitions 0/653 dead transitions. [2024-06-21 16:43:57,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 653 transitions, 12358 flow [2024-06-21 16:43:57,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:43:57,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:43:57,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-21 16:43:57,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4658536585365854 [2024-06-21 16:43:57,640 INFO L175 Difference]: Start difference. First operand has 349 places, 613 transitions, 10432 flow. Second operand 10 states and 191 transitions. [2024-06-21 16:43:57,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 653 transitions, 12358 flow [2024-06-21 16:44:01,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 653 transitions, 12101 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-21 16:44:01,397 INFO L231 Difference]: Finished difference. Result has 355 places, 618 transitions, 10744 flow [2024-06-21 16:44:01,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10179, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10744, PETRI_PLACES=355, PETRI_TRANSITIONS=618} [2024-06-21 16:44:01,397 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 313 predicate places. [2024-06-21 16:44:01,397 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 618 transitions, 10744 flow [2024-06-21 16:44:01,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:01,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:44:01,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:44:01,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 16:44:01,398 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)] === [2024-06-21 16:44:01,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:44:01,398 INFO L85 PathProgramCache]: Analyzing trace with hash 725604788, now seen corresponding path program 4 times [2024-06-21 16:44:01,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:44:01,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924329376] [2024-06-21 16:44:01,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:44:01,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:44:01,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:44:02,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:44:02,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:44:02,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924329376] [2024-06-21 16:44:02,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924329376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:44:02,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:44:02,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:44:02,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630875809] [2024-06-21 16:44:02,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:44:02,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:44:02,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:44:02,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:44:02,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:44:02,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:44:02,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 618 transitions, 10744 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:44:02,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:44:02,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:44:02,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:44:04,992 INFO L124 PetriNetUnfolderBase]: 7384/11139 cut-off events. [2024-06-21 16:44:04,992 INFO L125 PetriNetUnfolderBase]: For 1639861/1639861 co-relation queries the response was YES. [2024-06-21 16:44:05,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107938 conditions, 11139 events. 7384/11139 cut-off events. For 1639861/1639861 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 67397 event pairs, 1862 based on Foata normal form. 9/11147 useless extension candidates. Maximal degree in co-relation 107768. Up to 10682 conditions per place. [2024-06-21 16:44:05,153 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 579 selfloop transitions, 62 changer transitions 0/644 dead transitions. [2024-06-21 16:44:05,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 644 transitions, 12336 flow [2024-06-21 16:44:05,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:44:05,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:44:05,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 16:44:05,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-21 16:44:05,154 INFO L175 Difference]: Start difference. First operand has 355 places, 618 transitions, 10744 flow. Second operand 8 states and 142 transitions. [2024-06-21 16:44:05,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 644 transitions, 12336 flow [2024-06-21 16:44:08,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 644 transitions, 11819 flow, removed 53 selfloop flow, removed 8 redundant places. [2024-06-21 16:44:08,990 INFO L231 Difference]: Finished difference. Result has 355 places, 618 transitions, 10359 flow [2024-06-21 16:44:08,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10227, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=618, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10359, PETRI_PLACES=355, PETRI_TRANSITIONS=618} [2024-06-21 16:44:08,990 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 313 predicate places. [2024-06-21 16:44:08,990 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 618 transitions, 10359 flow [2024-06-21 16:44:08,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:44:08,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:44:08,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:44:08,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 16:44:08,991 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)] === [2024-06-21 16:44:09,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:44:09,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1626835702, now seen corresponding path program 5 times [2024-06-21 16:44:09,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:44:09,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005193602] [2024-06-21 16:44:09,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:44:09,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:44:09,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:44:09,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:44:09,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:44:09,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005193602] [2024-06-21 16:44:09,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005193602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:44:09,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:44:09,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:44:09,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081253305] [2024-06-21 16:44:09,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:44:09,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:44:09,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:44:09,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:44:09,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:44:09,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:44:09,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 618 transitions, 10359 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:44:09,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:44:09,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:44:09,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:44:12,589 INFO L124 PetriNetUnfolderBase]: 7369/11114 cut-off events. [2024-06-21 16:44:12,590 INFO L125 PetriNetUnfolderBase]: For 1629811/1629811 co-relation queries the response was YES. [2024-06-21 16:44:12,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106252 conditions, 11114 events. 7369/11114 cut-off events. For 1629811/1629811 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 67175 event pairs, 1905 based on Foata normal form. 9/11122 useless extension candidates. Maximal degree in co-relation 106081. Up to 10991 conditions per place. [2024-06-21 16:44:12,747 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 598 selfloop transitions, 37 changer transitions 0/638 dead transitions. [2024-06-21 16:44:12,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 638 transitions, 11758 flow [2024-06-21 16:44:12,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:44:12,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:44:12,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 16:44:12,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-21 16:44:12,749 INFO L175 Difference]: Start difference. First operand has 355 places, 618 transitions, 10359 flow. Second operand 8 states and 132 transitions. [2024-06-21 16:44:12,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 638 transitions, 11758 flow [2024-06-21 16:44:16,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 638 transitions, 11066 flow, removed 22 selfloop flow, removed 13 redundant places. [2024-06-21 16:44:16,524 INFO L231 Difference]: Finished difference. Result has 350 places, 622 transitions, 9831 flow [2024-06-21 16:44:16,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9681, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=618, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9831, PETRI_PLACES=350, PETRI_TRANSITIONS=622} [2024-06-21 16:44:16,524 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 308 predicate places. [2024-06-21 16:44:16,524 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 622 transitions, 9831 flow [2024-06-21 16:44:16,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:44:16,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:44:16,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:44:16,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 16:44:16,525 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)] === [2024-06-21 16:44:16,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:44:16,525 INFO L85 PathProgramCache]: Analyzing trace with hash 790142010, now seen corresponding path program 6 times [2024-06-21 16:44:16,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:44:16,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164702216] [2024-06-21 16:44:16,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:44:16,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:44:16,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:44:17,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:44:17,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:44:17,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164702216] [2024-06-21 16:44:17,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164702216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:44:17,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:44:17,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:44:17,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246552043] [2024-06-21 16:44:17,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:44:17,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:44:17,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:44:17,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:44:17,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:44:17,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:44:17,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 622 transitions, 9831 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:44:17,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:44:17,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:44:17,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:44:20,085 INFO L124 PetriNetUnfolderBase]: 7354/11093 cut-off events. [2024-06-21 16:44:20,085 INFO L125 PetriNetUnfolderBase]: For 1616722/1616722 co-relation queries the response was YES. [2024-06-21 16:44:20,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104174 conditions, 11093 events. 7354/11093 cut-off events. For 1616722/1616722 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 67058 event pairs, 1877 based on Foata normal form. 9/11101 useless extension candidates. Maximal degree in co-relation 104004. Up to 10928 conditions per place. [2024-06-21 16:44:20,252 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 597 selfloop transitions, 44 changer transitions 0/644 dead transitions. [2024-06-21 16:44:20,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 644 transitions, 11235 flow [2024-06-21 16:44:20,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:44:20,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:44:20,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 16:44:20,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-21 16:44:20,254 INFO L175 Difference]: Start difference. First operand has 350 places, 622 transitions, 9831 flow. Second operand 8 states and 137 transitions. [2024-06-21 16:44:20,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 644 transitions, 11235 flow [2024-06-21 16:44:23,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 644 transitions, 11142 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 16:44:23,980 INFO L231 Difference]: Finished difference. Result has 353 places, 625 transitions, 9893 flow [2024-06-21 16:44:23,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9738, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9893, PETRI_PLACES=353, PETRI_TRANSITIONS=625} [2024-06-21 16:44:23,981 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 311 predicate places. [2024-06-21 16:44:23,981 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 625 transitions, 9893 flow [2024-06-21 16:44:23,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:44:23,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:44:23,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:44:23,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 16:44:23,982 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)] === [2024-06-21 16:44:23,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:44:23,982 INFO L85 PathProgramCache]: Analyzing trace with hash -615718858, now seen corresponding path program 7 times [2024-06-21 16:44:23,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:44:23,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138747233] [2024-06-21 16:44:23,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:44:23,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:44:24,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:44:24,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:44:24,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:44:24,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138747233] [2024-06-21 16:44:24,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138747233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:44:24,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:44:24,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:44:24,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591646095] [2024-06-21 16:44:24,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:44:24,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:44:24,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:44:24,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:44:24,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:44:24,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:44:24,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 625 transitions, 9893 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:44:24,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:44:24,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:44:24,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:44:27,434 INFO L124 PetriNetUnfolderBase]: 7384/11137 cut-off events. [2024-06-21 16:44:27,434 INFO L125 PetriNetUnfolderBase]: For 1634231/1634233 co-relation queries the response was YES. [2024-06-21 16:44:27,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104813 conditions, 11137 events. 7384/11137 cut-off events. For 1634231/1634233 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 67319 event pairs, 1890 based on Foata normal form. 8/11144 useless extension candidates. Maximal degree in co-relation 104642. Up to 10592 conditions per place. [2024-06-21 16:44:27,589 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 565 selfloop transitions, 81 changer transitions 0/649 dead transitions. [2024-06-21 16:44:27,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 649 transitions, 11730 flow [2024-06-21 16:44:27,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:44:27,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:44:27,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 16:44:27,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-21 16:44:27,591 INFO L175 Difference]: Start difference. First operand has 353 places, 625 transitions, 9893 flow. Second operand 8 states and 143 transitions. [2024-06-21 16:44:27,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 649 transitions, 11730 flow [2024-06-21 16:44:31,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 649 transitions, 11619 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 16:44:31,906 INFO L231 Difference]: Finished difference. Result has 355 places, 629 transitions, 10036 flow [2024-06-21 16:44:31,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9782, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10036, PETRI_PLACES=355, PETRI_TRANSITIONS=629} [2024-06-21 16:44:31,920 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 313 predicate places. [2024-06-21 16:44:31,921 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 629 transitions, 10036 flow [2024-06-21 16:44:31,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-21 16:44:31,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:44:31,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:44:31,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 16:44:31,921 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)] === [2024-06-21 16:44:31,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:44:31,921 INFO L85 PathProgramCache]: Analyzing trace with hash 823425366, now seen corresponding path program 8 times [2024-06-21 16:44:31,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:44:31,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302217122] [2024-06-21 16:44:31,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:44:31,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:44:31,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat