./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix001.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/mix001.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/mix001.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/mix001.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 16:07:52,898 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 16:07:52,975 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 16:07:52,979 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 16:07:52,979 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 16:07:53,000 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 16:07:53,001 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 16:07:53,002 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 16:07:53,002 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 16:07:53,005 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 16:07:53,005 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 16:07:53,006 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 16:07:53,006 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 16:07:53,007 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 16:07:53,007 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 16:07:53,008 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 16:07:53,008 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 16:07:53,008 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 16:07:53,008 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 16:07:53,009 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 16:07:53,009 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 16:07:53,009 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 16:07:53,009 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 16:07:53,010 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 16:07:53,010 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 16:07:53,010 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 16:07:53,010 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 16:07:53,010 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 16:07:53,011 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 16:07:53,011 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 16:07:53,012 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 16:07:53,012 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 16:07:53,012 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:07:53,013 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 16:07:53,013 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 16:07:53,013 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 16:07:53,013 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 16:07:53,013 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 16:07:53,013 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 16:07:53,014 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 16:07:53,014 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 16:07:53,014 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 16:07:53,014 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 16:07:53,014 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 16:07:53,237 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 16:07:53,254 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 16:07:53,256 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 16:07:53,257 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 16:07:53,257 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 16:07:53,258 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix001.oepc.i [2024-06-21 16:07:54,315 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 16:07:54,516 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 16:07:54,517 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix001.oepc.i [2024-06-21 16:07:54,534 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4dbe8d623/09dfbecb00f244b0896426ec12f2045e/FLAG43e9340a7 [2024-06-21 16:07:54,543 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4dbe8d623/09dfbecb00f244b0896426ec12f2045e [2024-06-21 16:07:54,545 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 16:07:54,546 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 16:07:54,546 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix001.oepc.yml/witness.yml [2024-06-21 16:07:54,714 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 16:07:54,715 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 16:07:54,716 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 16:07:54,716 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 16:07:54,720 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 16:07:54,720 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:07:54" (1/2) ... [2024-06-21 16:07:54,721 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@373efe75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:07:54, skipping insertion in model container [2024-06-21 16:07:54,721 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:07:54" (1/2) ... [2024-06-21 16:07:54,723 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@bc429a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:07:54, skipping insertion in model container [2024-06-21 16:07:54,723 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:07:54" (2/2) ... [2024-06-21 16:07:54,724 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@373efe75 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:07:54, skipping insertion in model container [2024-06-21 16:07:54,724 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:07:54" (2/2) ... [2024-06-21 16:07:54,724 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 16:07:54,800 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 16:07:54,801 INFO L97 edCorrectnessWitness]: Location invariant before [L867-L867] (((((((((((((((((((((! multithreaded || z$r_buff1_thd0 == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) [2024-06-21 16:07:54,801 INFO L97 edCorrectnessWitness]: Location invariant before [L869-L869] (((((((((((((((((((((! multithreaded || z$r_buff1_thd0 == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) [2024-06-21 16:07:54,802 INFO L97 edCorrectnessWitness]: Location invariant before [L870-L870] (((((((((((((((((((((! multithreaded || z$r_buff1_thd0 == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) [2024-06-21 16:07:54,802 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 16:07:54,802 INFO L106 edCorrectnessWitness]: ghost_update [L865-L865] multithreaded = 1; [2024-06-21 16:07:54,839 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 16:07:55,117 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:07:55,138 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 16:07:55,256 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:07:55,289 INFO L206 MainTranslator]: Completed translation [2024-06-21 16:07:55,289 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:07:55 WrapperNode [2024-06-21 16:07:55,289 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 16:07:55,290 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 16:07:55,290 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 16:07:55,290 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 16:07:55,296 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 04:07:55" (1/1) ... [2024-06-21 16:07:55,323 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 04:07:55" (1/1) ... [2024-06-21 16:07:55,370 INFO L138 Inliner]: procedures = 175, calls = 49, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 151 [2024-06-21 16:07:55,370 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 16:07:55,371 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 16:07:55,371 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 16:07:55,371 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 16:07:55,379 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 04:07:55" (1/1) ... [2024-06-21 16:07:55,379 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 04:07:55" (1/1) ... [2024-06-21 16:07:55,382 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 04:07:55" (1/1) ... [2024-06-21 16:07:55,401 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 16:07:55,405 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 04:07:55" (1/1) ... [2024-06-21 16:07:55,406 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 04:07:55" (1/1) ... [2024-06-21 16:07:55,413 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 04:07:55" (1/1) ... [2024-06-21 16:07:55,414 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 04:07:55" (1/1) ... [2024-06-21 16:07:55,416 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 04:07:55" (1/1) ... [2024-06-21 16:07:55,417 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 04:07:55" (1/1) ... [2024-06-21 16:07:55,420 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 16:07:55,421 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 16:07:55,421 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 16:07:55,421 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 16:07:55,421 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 04:07:55" (1/1) ... [2024-06-21 16:07:55,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:07:55,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 16:07:55,446 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 16:07:55,448 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 16:07:55,473 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 16:07:55,482 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 16:07:55,483 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 16:07:55,483 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 16:07:55,483 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 16:07:55,483 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 16:07:55,483 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 16:07:55,484 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 16:07:55,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 16:07:55,484 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 16:07:55,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 16:07:55,484 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 16:07:55,485 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 16:07:55,592 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 16:07:55,594 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 16:07:55,940 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 16:07:55,940 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 16:07:56,128 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 16:07:56,129 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 16:07:56,130 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:07:56 BoogieIcfgContainer [2024-06-21 16:07:56,130 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 16:07:56,132 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 16:07:56,133 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 16:07:56,135 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 16:07:56,135 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 04:07:54" (1/4) ... [2024-06-21 16:07:56,136 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f745701 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 04:07:56, skipping insertion in model container [2024-06-21 16:07:56,136 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:07:54" (2/4) ... [2024-06-21 16:07:56,136 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f745701 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 04:07:56, skipping insertion in model container [2024-06-21 16:07:56,136 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 04:07:55" (3/4) ... [2024-06-21 16:07:56,137 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f745701 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 04:07:56, skipping insertion in model container [2024-06-21 16:07:56,138 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:07:56" (4/4) ... [2024-06-21 16:07:56,141 INFO L112 eAbstractionObserver]: Analyzing ICFG mix001.oepc.i [2024-06-21 16:07:56,154 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 16:07:56,155 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 16:07:56,155 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 16:07:56,197 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 16:07:56,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-21 16:07:56,255 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-21 16:07:56,255 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:07:56,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 70 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 16:07:56,258 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-21 16:07:56,261 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-21 16:07:56,268 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 16:07:56,274 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;@7218fa90, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 16:07:56,274 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 16:07:56,279 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 16:07:56,279 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-21 16:07:56,279 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:07:56,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:56,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 16:07:56,280 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 16:07:56,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:56,284 INFO L85 PathProgramCache]: Analyzing trace with hash 421617153, now seen corresponding path program 1 times [2024-06-21 16:07:56,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:56,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627621992] [2024-06-21 16:07:56,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:56,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:56,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:57,149 INFO 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 16:07:57,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:57,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627621992] [2024-06-21 16:07:57,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627621992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:57,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:57,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 16:07:57,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271839247] [2024-06-21 16:07:57,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:57,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 16:07:57,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:57,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 16:07:57,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 16:07:57,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2024-06-21 16:07:57,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states 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 16:07:57,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:57,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2024-06-21 16:07:57,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:57,587 INFO L124 PetriNetUnfolderBase]: 1363/2133 cut-off events. [2024-06-21 16:07:57,587 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-06-21 16:07:57,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4257 conditions, 2133 events. 1363/2133 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 10767 event pairs, 964 based on Foata normal form. 1/2077 useless extension candidates. Maximal degree in co-relation 4245. Up to 2037 conditions per place. [2024-06-21 16:07:57,602 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 32 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-21 16:07:57,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 175 flow [2024-06-21 16:07:57,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 16:07:57,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 16:07:57,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 81 transitions. [2024-06-21 16:07:57,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627906976744186 [2024-06-21 16:07:57,613 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 81 transitions. [2024-06-21 16:07:57,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 175 flow [2024-06-21 16:07:57,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 16:07:57,618 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-21 16:07:57,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-21 16:07:57,622 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-21 16:07:57,622 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-21 16:07:57,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states 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 16:07:57,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:57,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:57,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 16:07:57,623 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 16:07:57,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:57,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1447404018, now seen corresponding path program 1 times [2024-06-21 16:07:57,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:57,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022921418] [2024-06-21 16:07:57,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:57,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:57,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:58,149 INFO 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 16:07:58,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:58,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022921418] [2024-06-21 16:07:58,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022921418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:58,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:58,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 16:07:58,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412454432] [2024-06-21 16:07:58,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:58,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 16:07:58,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:58,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 16:07:58,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 16:07:58,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2024-06-21 16:07:58,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 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 16:07:58,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:58,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2024-06-21 16:07:58,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:58,488 INFO L124 PetriNetUnfolderBase]: 1357/2134 cut-off events. [2024-06-21 16:07:58,488 INFO L125 PetriNetUnfolderBase]: For 414/414 co-relation queries the response was YES. [2024-06-21 16:07:58,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4801 conditions, 2134 events. 1357/2134 cut-off events. For 414/414 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 10886 event pairs, 840 based on Foata normal form. 3/2120 useless extension candidates. Maximal degree in co-relation 4789. Up to 2013 conditions per place. [2024-06-21 16:07:58,499 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 39 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-21 16:07:58,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 242 flow [2024-06-21 16:07:58,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 16:07:58,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 16:07:58,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-06-21 16:07:58,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6104651162790697 [2024-06-21 16:07:58,502 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 105 transitions. [2024-06-21 16:07:58,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 242 flow [2024-06-21 16:07:58,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 16:07:58,505 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-21 16:07:58,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-21 16:07:58,505 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-21 16:07:58,506 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-21 16:07:58,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 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 16:07:58,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:58,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:58,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 16:07:58,509 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 16:07:58,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:58,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1919853034, now seen corresponding path program 1 times [2024-06-21 16:07:58,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:58,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48118082] [2024-06-21 16:07:58,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:58,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:58,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:59,331 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 16:07:59,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:59,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48118082] [2024-06-21 16:07:59,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48118082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:59,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:59,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 16:07:59,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742264908] [2024-06-21 16:07:59,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:59,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 16:07:59,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:59,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 16:07:59,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-21 16:07:59,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2024-06-21 16:07:59,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 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 16:07:59,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:59,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2024-06-21 16:07:59,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:59,727 INFO L124 PetriNetUnfolderBase]: 1345/2138 cut-off events. [2024-06-21 16:07:59,727 INFO L125 PetriNetUnfolderBase]: For 1162/1162 co-relation queries the response was YES. [2024-06-21 16:07:59,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5310 conditions, 2138 events. 1345/2138 cut-off events. For 1162/1162 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 11001 event pairs, 592 based on Foata normal form. 6/2124 useless extension candidates. Maximal degree in co-relation 5296. Up to 1965 conditions per place. [2024-06-21 16:07:59,738 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 47 selfloop transitions, 10 changer transitions 0/65 dead transitions. [2024-06-21 16:07:59,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 65 transitions, 324 flow [2024-06-21 16:07:59,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:07:59,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:07:59,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-21 16:07:59,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6046511627906976 [2024-06-21 16:07:59,739 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 5 states and 130 transitions. [2024-06-21 16:07:59,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 65 transitions, 324 flow [2024-06-21 16:07:59,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 65 transitions, 310 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 16:07:59,741 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 176 flow [2024-06-21 16:07:59,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=176, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-21 16:07:59,742 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 6 predicate places. [2024-06-21 16:07:59,742 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 176 flow [2024-06-21 16:07:59,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 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 16:07:59,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:59,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:59,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 16:07:59,743 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:07:59,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:59,743 INFO L85 PathProgramCache]: Analyzing trace with hash -143902164, now seen corresponding path program 1 times [2024-06-21 16:07:59,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:59,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416493356] [2024-06-21 16:07:59,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:59,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:59,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:00,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:08:00,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:00,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416493356] [2024-06-21 16:08:00,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416493356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:00,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:00,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:08:00,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127285661] [2024-06-21 16:08:00,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:00,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:08:00,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:00,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:08:00,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:08:00,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:08:00,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 176 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:00,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:00,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:08:00,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:00,867 INFO L124 PetriNetUnfolderBase]: 1930/2977 cut-off events. [2024-06-21 16:08:00,867 INFO L125 PetriNetUnfolderBase]: For 2797/2797 co-relation queries the response was YES. [2024-06-21 16:08:00,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8032 conditions, 2977 events. 1930/2977 cut-off events. For 2797/2797 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 14863 event pairs, 1075 based on Foata normal form. 2/2977 useless extension candidates. Maximal degree in co-relation 8016. Up to 2849 conditions per place. [2024-06-21 16:08:00,880 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 44 selfloop transitions, 8 changer transitions 0/57 dead transitions. [2024-06-21 16:08:00,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 57 transitions, 322 flow [2024-06-21 16:08:00,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:08:00,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:08:00,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 98 transitions. [2024-06-21 16:08:00,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-21 16:08:00,882 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 176 flow. Second operand 5 states and 98 transitions. [2024-06-21 16:08:00,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 57 transitions, 322 flow [2024-06-21 16:08:00,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 57 transitions, 298 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 16:08:00,885 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 196 flow [2024-06-21 16:08:00,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=196, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-21 16:08:00,885 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 8 predicate places. [2024-06-21 16:08:00,886 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 196 flow [2024-06-21 16:08:00,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:00,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:00,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:00,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 16:08:00,886 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 16:08:00,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:00,887 INFO L85 PathProgramCache]: Analyzing trace with hash 866500830, now seen corresponding path program 1 times [2024-06-21 16:08:00,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:00,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127046888] [2024-06-21 16:08:00,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:00,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:00,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:02,161 INFO 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 16:08:02,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:02,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127046888] [2024-06-21 16:08:02,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127046888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:02,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:02,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:08:02,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792638751] [2024-06-21 16:08:02,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:02,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:08:02,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:02,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:08:02,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:08:02,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-21 16:08:02,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 196 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 16:08:02,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:02,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-21 16:08:02,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:02,831 INFO L124 PetriNetUnfolderBase]: 1797/2828 cut-off events. [2024-06-21 16:08:02,831 INFO L125 PetriNetUnfolderBase]: For 4327/4327 co-relation queries the response was YES. [2024-06-21 16:08:02,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8152 conditions, 2828 events. 1797/2828 cut-off events. For 4327/4327 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 14574 event pairs, 603 based on Foata normal form. 6/2822 useless extension candidates. Maximal degree in co-relation 8135. Up to 2550 conditions per place. [2024-06-21 16:08:02,844 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 67 selfloop transitions, 18 changer transitions 0/93 dead transitions. [2024-06-21 16:08:02,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 93 transitions, 498 flow [2024-06-21 16:08:02,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:08:02,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:08:02,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-21 16:08:02,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5523255813953488 [2024-06-21 16:08:02,847 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 196 flow. Second operand 8 states and 190 transitions. [2024-06-21 16:08:02,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 93 transitions, 498 flow [2024-06-21 16:08:02,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 93 transitions, 478 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 16:08:02,850 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 265 flow [2024-06-21 16:08:02,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=265, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2024-06-21 16:08:02,850 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2024-06-21 16:08:02,850 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 265 flow [2024-06-21 16:08:02,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 16:08:02,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:02,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:02,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 16:08:02,851 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 16:08:02,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:02,852 INFO L85 PathProgramCache]: Analyzing trace with hash -165998705, now seen corresponding path program 1 times [2024-06-21 16:08:02,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:02,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543549663] [2024-06-21 16:08:02,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:02,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:02,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:03,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:08:03,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:03,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543549663] [2024-06-21 16:08:03,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543549663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:03,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:03,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:08:03,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483623599] [2024-06-21 16:08:03,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:03,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:08:03,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:03,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:08:03,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:08:03,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:08:03,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 265 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:03,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:03,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:08:03,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:04,135 INFO L124 PetriNetUnfolderBase]: 1911/2946 cut-off events. [2024-06-21 16:08:04,135 INFO L125 PetriNetUnfolderBase]: For 6507/6507 co-relation queries the response was YES. [2024-06-21 16:08:04,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9332 conditions, 2946 events. 1911/2946 cut-off events. For 6507/6507 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 14688 event pairs, 750 based on Foata normal form. 4/2948 useless extension candidates. Maximal degree in co-relation 9312. Up to 2802 conditions per place. [2024-06-21 16:08:04,158 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 56 selfloop transitions, 11 changer transitions 0/72 dead transitions. [2024-06-21 16:08:04,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 72 transitions, 459 flow [2024-06-21 16:08:04,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:08:04,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:08:04,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-21 16:08:04,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44573643410852715 [2024-06-21 16:08:04,160 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 265 flow. Second operand 6 states and 115 transitions. [2024-06-21 16:08:04,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 72 transitions, 459 flow [2024-06-21 16:08:04,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 72 transitions, 416 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 16:08:04,167 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 278 flow [2024-06-21 16:08:04,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=278, PETRI_PLACES=60, PETRI_TRANSITIONS=56} [2024-06-21 16:08:04,170 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 16 predicate places. [2024-06-21 16:08:04,170 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 278 flow [2024-06-21 16:08:04,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:04,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:04,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:04,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 16:08:04,171 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 16:08:04,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:04,171 INFO L85 PathProgramCache]: Analyzing trace with hash -857666613, now seen corresponding path program 1 times [2024-06-21 16:08:04,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:04,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982509918] [2024-06-21 16:08:04,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:04,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:04,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:04,873 INFO 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 16:08:04,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:04,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982509918] [2024-06-21 16:08:04,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982509918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:04,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:04,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:08:04,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041524266] [2024-06-21 16:08:04,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:04,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:08:04,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:04,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:08:04,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:08:04,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:08:04,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 278 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:04,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:04,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:08:04,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:05,401 INFO L124 PetriNetUnfolderBase]: 1922/2986 cut-off events. [2024-06-21 16:08:05,401 INFO L125 PetriNetUnfolderBase]: For 8450/8456 co-relation queries the response was YES. [2024-06-21 16:08:05,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9989 conditions, 2986 events. 1922/2986 cut-off events. For 8450/8456 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 15081 event pairs, 751 based on Foata normal form. 6/2989 useless extension candidates. Maximal degree in co-relation 9967. Up to 2801 conditions per place. [2024-06-21 16:08:05,413 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 61 selfloop transitions, 16 changer transitions 0/82 dead transitions. [2024-06-21 16:08:05,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 82 transitions, 550 flow [2024-06-21 16:08:05,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:08:05,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:08:05,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-21 16:08:05,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4689922480620155 [2024-06-21 16:08:05,415 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 278 flow. Second operand 6 states and 121 transitions. [2024-06-21 16:08:05,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 82 transitions, 550 flow [2024-06-21 16:08:05,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 82 transitions, 518 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 16:08:05,418 INFO L231 Difference]: Finished difference. Result has 62 places, 62 transitions, 336 flow [2024-06-21 16:08:05,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=336, PETRI_PLACES=62, PETRI_TRANSITIONS=62} [2024-06-21 16:08:05,419 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 18 predicate places. [2024-06-21 16:08:05,419 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 62 transitions, 336 flow [2024-06-21 16:08:05,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:05,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:05,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:05,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 16:08:05,420 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 16:08:05,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:05,420 INFO L85 PathProgramCache]: Analyzing trace with hash -535513683, now seen corresponding path program 2 times [2024-06-21 16:08:05,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:05,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849881468] [2024-06-21 16:08:05,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:05,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:05,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:05,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:08:05,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:05,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849881468] [2024-06-21 16:08:05,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849881468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:05,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:05,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:08:05,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517095379] [2024-06-21 16:08:05,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:05,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:08:05,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:05,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:08:05,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:08:06,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:08:06,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 62 transitions, 336 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:06,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:06,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:08:06,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:06,501 INFO L124 PetriNetUnfolderBase]: 1917/2978 cut-off events. [2024-06-21 16:08:06,502 INFO L125 PetriNetUnfolderBase]: For 10815/10815 co-relation queries the response was YES. [2024-06-21 16:08:06,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10568 conditions, 2978 events. 1917/2978 cut-off events. For 10815/10815 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 15006 event pairs, 747 based on Foata normal form. 2/2978 useless extension candidates. Maximal degree in co-relation 10545. Up to 2820 conditions per place. [2024-06-21 16:08:06,514 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 61 selfloop transitions, 11 changer transitions 0/77 dead transitions. [2024-06-21 16:08:06,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 77 transitions, 518 flow [2024-06-21 16:08:06,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:08:06,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:08:06,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-21 16:08:06,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 16:08:06,519 INFO L175 Difference]: Start difference. First operand has 62 places, 62 transitions, 336 flow. Second operand 6 states and 114 transitions. [2024-06-21 16:08:06,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 77 transitions, 518 flow [2024-06-21 16:08:06,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 77 transitions, 482 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-21 16:08:06,526 INFO L231 Difference]: Finished difference. Result has 66 places, 62 transitions, 330 flow [2024-06-21 16:08:06,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=330, PETRI_PLACES=66, PETRI_TRANSITIONS=62} [2024-06-21 16:08:06,527 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 22 predicate places. [2024-06-21 16:08:06,527 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 62 transitions, 330 flow [2024-06-21 16:08:06,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:06,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:06,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:06,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 16:08:06,528 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 16:08:06,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:06,528 INFO L85 PathProgramCache]: Analyzing trace with hash -818010091, now seen corresponding path program 1 times [2024-06-21 16:08:06,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:06,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043847881] [2024-06-21 16:08:06,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:06,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:06,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:07,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:08:07,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:07,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043847881] [2024-06-21 16:08:07,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043847881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:07,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:07,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:08:07,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344898332] [2024-06-21 16:08:07,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:07,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:08:07,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:07,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:08:07,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:08:07,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:08:07,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 330 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:07,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:07,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:08:07,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:07,837 INFO L124 PetriNetUnfolderBase]: 1928/2994 cut-off events. [2024-06-21 16:08:07,837 INFO L125 PetriNetUnfolderBase]: For 12919/12925 co-relation queries the response was YES. [2024-06-21 16:08:07,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10919 conditions, 2994 events. 1928/2994 cut-off events. For 12919/12925 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 15069 event pairs, 733 based on Foata normal form. 6/2997 useless extension candidates. Maximal degree in co-relation 10894. Up to 2772 conditions per place. [2024-06-21 16:08:07,852 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 66 selfloop transitions, 24 changer transitions 0/95 dead transitions. [2024-06-21 16:08:07,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 95 transitions, 662 flow [2024-06-21 16:08:07,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:08:07,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:08:07,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-21 16:08:07,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4717607973421927 [2024-06-21 16:08:07,854 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 330 flow. Second operand 7 states and 142 transitions. [2024-06-21 16:08:07,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 95 transitions, 662 flow [2024-06-21 16:08:07,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 95 transitions, 632 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 16:08:07,860 INFO L231 Difference]: Finished difference. Result has 68 places, 68 transitions, 414 flow [2024-06-21 16:08:07,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=414, PETRI_PLACES=68, PETRI_TRANSITIONS=68} [2024-06-21 16:08:07,861 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 24 predicate places. [2024-06-21 16:08:07,861 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 68 transitions, 414 flow [2024-06-21 16:08:07,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:07,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:07,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:07,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 16:08:07,862 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 16:08:07,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:07,862 INFO L85 PathProgramCache]: Analyzing trace with hash 239126667, now seen corresponding path program 2 times [2024-06-21 16:08:07,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:07,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619603873] [2024-06-21 16:08:07,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:07,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:07,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:08,697 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 16:08:08,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:08,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619603873] [2024-06-21 16:08:08,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619603873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:08,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:08,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:08:08,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342747222] [2024-06-21 16:08:08,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:08,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:08:08,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:08,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:08:08,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:08:08,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:08:08,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 68 transitions, 414 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:08,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:08,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:08:08,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:09,239 INFO L124 PetriNetUnfolderBase]: 1939/3010 cut-off events. [2024-06-21 16:08:09,239 INFO L125 PetriNetUnfolderBase]: For 16224/16230 co-relation queries the response was YES. [2024-06-21 16:08:09,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11666 conditions, 3010 events. 1939/3010 cut-off events. For 16224/16230 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 15146 event pairs, 733 based on Foata normal form. 6/3013 useless extension candidates. Maximal degree in co-relation 11640. Up to 2819 conditions per place. [2024-06-21 16:08:09,252 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 69 selfloop transitions, 19 changer transitions 0/93 dead transitions. [2024-06-21 16:08:09,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 93 transitions, 678 flow [2024-06-21 16:08:09,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:08:09,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:08:09,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-21 16:08:09,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-21 16:08:09,254 INFO L175 Difference]: Start difference. First operand has 68 places, 68 transitions, 414 flow. Second operand 7 states and 136 transitions. [2024-06-21 16:08:09,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 93 transitions, 678 flow [2024-06-21 16:08:09,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 93 transitions, 630 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-21 16:08:09,264 INFO L231 Difference]: Finished difference. Result has 72 places, 71 transitions, 450 flow [2024-06-21 16:08:09,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=450, PETRI_PLACES=72, PETRI_TRANSITIONS=71} [2024-06-21 16:08:09,265 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 28 predicate places. [2024-06-21 16:08:09,267 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 71 transitions, 450 flow [2024-06-21 16:08:09,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:09,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:09,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:09,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 16:08:09,268 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 16:08:09,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:09,268 INFO L85 PathProgramCache]: Analyzing trace with hash 239126884, now seen corresponding path program 1 times [2024-06-21 16:08:09,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:09,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29496302] [2024-06-21 16:08:09,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:09,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:09,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:09,995 INFO 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 16:08:09,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:09,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29496302] [2024-06-21 16:08:09,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29496302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:09,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:09,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:08:09,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877964945] [2024-06-21 16:08:09,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:09,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:08:09,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:10,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:08:10,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:08:10,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:08:10,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 71 transitions, 450 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:10,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:10,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:08:10,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:10,526 INFO L124 PetriNetUnfolderBase]: 1977/3062 cut-off events. [2024-06-21 16:08:10,527 INFO L125 PetriNetUnfolderBase]: For 18996/19002 co-relation queries the response was YES. [2024-06-21 16:08:10,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12100 conditions, 3062 events. 1977/3062 cut-off events. For 18996/19002 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 15351 event pairs, 688 based on Foata normal form. 5/3063 useless extension candidates. Maximal degree in co-relation 12072. Up to 2827 conditions per place. [2024-06-21 16:08:10,542 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 78 selfloop transitions, 23 changer transitions 0/106 dead transitions. [2024-06-21 16:08:10,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 106 transitions, 822 flow [2024-06-21 16:08:10,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:08:10,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:08:10,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-21 16:08:10,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4717607973421927 [2024-06-21 16:08:10,544 INFO L175 Difference]: Start difference. First operand has 72 places, 71 transitions, 450 flow. Second operand 7 states and 142 transitions. [2024-06-21 16:08:10,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 106 transitions, 822 flow [2024-06-21 16:08:10,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 106 transitions, 772 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 16:08:10,554 INFO L231 Difference]: Finished difference. Result has 75 places, 80 transitions, 540 flow [2024-06-21 16:08:10,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=540, PETRI_PLACES=75, PETRI_TRANSITIONS=80} [2024-06-21 16:08:10,554 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 31 predicate places. [2024-06-21 16:08:10,554 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 80 transitions, 540 flow [2024-06-21 16:08:10,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:10,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:10,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:10,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 16:08:10,555 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 16:08:10,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:10,555 INFO L85 PathProgramCache]: Analyzing trace with hash 579213004, now seen corresponding path program 2 times [2024-06-21 16:08:10,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:10,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765551293] [2024-06-21 16:08:10,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:10,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:10,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:11,245 INFO 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 16:08:11,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:11,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765551293] [2024-06-21 16:08:11,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765551293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:11,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:11,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:08:11,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903457271] [2024-06-21 16:08:11,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:11,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:08:11,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:11,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:08:11,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:08:11,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:08:11,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 80 transitions, 540 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:11,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:11,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:08:11,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:11,822 INFO L124 PetriNetUnfolderBase]: 1999/3099 cut-off events. [2024-06-21 16:08:11,822 INFO L125 PetriNetUnfolderBase]: For 23136/23136 co-relation queries the response was YES. [2024-06-21 16:08:11,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13101 conditions, 3099 events. 1999/3099 cut-off events. For 23136/23136 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 15539 event pairs, 695 based on Foata normal form. 4/3101 useless extension candidates. Maximal degree in co-relation 13071. Up to 2921 conditions per place. [2024-06-21 16:08:11,837 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 84 selfloop transitions, 14 changer transitions 0/103 dead transitions. [2024-06-21 16:08:11,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 103 transitions, 822 flow [2024-06-21 16:08:11,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:08:11,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:08:11,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-21 16:08:11,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43853820598006643 [2024-06-21 16:08:11,838 INFO L175 Difference]: Start difference. First operand has 75 places, 80 transitions, 540 flow. Second operand 7 states and 132 transitions. [2024-06-21 16:08:11,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 103 transitions, 822 flow [2024-06-21 16:08:11,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 103 transitions, 794 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-21 16:08:11,850 INFO L231 Difference]: Finished difference. Result has 80 places, 83 transitions, 588 flow [2024-06-21 16:08:11,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=588, PETRI_PLACES=80, PETRI_TRANSITIONS=83} [2024-06-21 16:08:11,851 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 36 predicate places. [2024-06-21 16:08:11,851 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 83 transitions, 588 flow [2024-06-21 16:08:11,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:11,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:11,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:11,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 16:08:11,852 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 16:08:11,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:11,852 INFO L85 PathProgramCache]: Analyzing trace with hash -611206921, now seen corresponding path program 3 times [2024-06-21 16:08:11,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:11,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045830371] [2024-06-21 16:08:11,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:11,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:11,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:12,575 INFO 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 16:08:12,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:12,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045830371] [2024-06-21 16:08:12,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045830371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:12,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:12,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:08:12,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322568161] [2024-06-21 16:08:12,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:12,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:08:12,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:12,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:08:12,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:08:12,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:08:12,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 83 transitions, 588 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:12,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:12,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:08:12,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:13,157 INFO L124 PetriNetUnfolderBase]: 1994/3092 cut-off events. [2024-06-21 16:08:13,158 INFO L125 PetriNetUnfolderBase]: For 26168/26168 co-relation queries the response was YES. [2024-06-21 16:08:13,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13362 conditions, 3092 events. 1994/3092 cut-off events. For 26168/26168 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 15497 event pairs, 695 based on Foata normal form. 2/3092 useless extension candidates. Maximal degree in co-relation 13329. Up to 2923 conditions per place. [2024-06-21 16:08:13,171 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 83 selfloop transitions, 14 changer transitions 0/102 dead transitions. [2024-06-21 16:08:13,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 102 transitions, 830 flow [2024-06-21 16:08:13,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:08:13,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:08:13,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-21 16:08:13,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-21 16:08:13,173 INFO L175 Difference]: Start difference. First operand has 80 places, 83 transitions, 588 flow. Second operand 7 states and 131 transitions. [2024-06-21 16:08:13,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 102 transitions, 830 flow [2024-06-21 16:08:13,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 102 transitions, 768 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 16:08:13,186 INFO L231 Difference]: Finished difference. Result has 82 places, 83 transitions, 562 flow [2024-06-21 16:08:13,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=526, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=562, PETRI_PLACES=82, PETRI_TRANSITIONS=83} [2024-06-21 16:08:13,186 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 38 predicate places. [2024-06-21 16:08:13,186 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 83 transitions, 562 flow [2024-06-21 16:08:13,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:13,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:13,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:13,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 16:08:13,187 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:08:13,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:13,187 INFO L85 PathProgramCache]: Analyzing trace with hash -2127513948, now seen corresponding path program 3 times [2024-06-21 16:08:13,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:13,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190861349] [2024-06-21 16:08:13,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:13,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:13,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:13,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:08:13,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:13,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190861349] [2024-06-21 16:08:13,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190861349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:13,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:13,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:08:13,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130693693] [2024-06-21 16:08:13,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:13,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:08:13,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:13,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:08:13,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:08:13,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:08:13,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 83 transitions, 562 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:13,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:13,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:08:13,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:14,346 INFO L124 PetriNetUnfolderBase]: 1984/3078 cut-off events. [2024-06-21 16:08:14,346 INFO L125 PetriNetUnfolderBase]: For 29011/29011 co-relation queries the response was YES. [2024-06-21 16:08:14,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13453 conditions, 3078 events. 1984/3078 cut-off events. For 29011/29011 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 15471 event pairs, 693 based on Foata normal form. 4/3080 useless extension candidates. Maximal degree in co-relation 13420. Up to 2873 conditions per place. [2024-06-21 16:08:14,361 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 80 selfloop transitions, 19 changer transitions 0/104 dead transitions. [2024-06-21 16:08:14,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 104 transitions, 816 flow [2024-06-21 16:08:14,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:08:14,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:08:14,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-21 16:08:14,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4485049833887043 [2024-06-21 16:08:14,363 INFO L175 Difference]: Start difference. First operand has 82 places, 83 transitions, 562 flow. Second operand 7 states and 135 transitions. [2024-06-21 16:08:14,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 104 transitions, 816 flow [2024-06-21 16:08:14,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 104 transitions, 754 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 16:08:14,376 INFO L231 Difference]: Finished difference. Result has 82 places, 83 transitions, 546 flow [2024-06-21 16:08:14,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=546, PETRI_PLACES=82, PETRI_TRANSITIONS=83} [2024-06-21 16:08:14,377 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 38 predicate places. [2024-06-21 16:08:14,377 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 83 transitions, 546 flow [2024-06-21 16:08:14,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:14,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:14,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:14,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 16:08:14,378 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:08:14,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:14,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1140000622, now seen corresponding path program 1 times [2024-06-21 16:08:14,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:14,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131451816] [2024-06-21 16:08:14,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:14,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:14,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:14,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:08:14,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:14,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131451816] [2024-06-21 16:08:14,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131451816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:14,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:14,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:08:14,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495549007] [2024-06-21 16:08:14,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:14,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:08:14,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:14,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:08:14,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:08:14,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:08:14,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 83 transitions, 546 flow. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states 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 16:08:14,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:14,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:08:14,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:15,425 INFO L124 PetriNetUnfolderBase]: 2402/3672 cut-off events. [2024-06-21 16:08:15,425 INFO L125 PetriNetUnfolderBase]: For 41918/41918 co-relation queries the response was YES. [2024-06-21 16:08:15,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16538 conditions, 3672 events. 2402/3672 cut-off events. For 41918/41918 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 18198 event pairs, 959 based on Foata normal form. 1/3671 useless extension candidates. Maximal degree in co-relation 16505. Up to 3525 conditions per place. [2024-06-21 16:08:15,445 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 71 selfloop transitions, 8 changer transitions 0/94 dead transitions. [2024-06-21 16:08:15,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 94 transitions, 744 flow [2024-06-21 16:08:15,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:08:15,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:08:15,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 93 transitions. [2024-06-21 16:08:15,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325581395348837 [2024-06-21 16:08:15,447 INFO L175 Difference]: Start difference. First operand has 82 places, 83 transitions, 546 flow. Second operand 5 states and 93 transitions. [2024-06-21 16:08:15,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 94 transitions, 744 flow [2024-06-21 16:08:15,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 94 transitions, 680 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 16:08:15,467 INFO L231 Difference]: Finished difference. Result has 81 places, 86 transitions, 530 flow [2024-06-21 16:08:15,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=482, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=530, PETRI_PLACES=81, PETRI_TRANSITIONS=86} [2024-06-21 16:08:15,467 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 37 predicate places. [2024-06-21 16:08:15,467 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 86 transitions, 530 flow [2024-06-21 16:08:15,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states 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 16:08:15,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:15,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:15,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 16:08:15,468 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 16:08:15,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:15,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1731601790, now seen corresponding path program 1 times [2024-06-21 16:08:15,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:15,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908169803] [2024-06-21 16:08:15,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:15,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:15,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:16,466 INFO 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 16:08:16,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:16,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908169803] [2024-06-21 16:08:16,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908169803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:16,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:16,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:08:16,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120608683] [2024-06-21 16:08:16,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:16,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:08:16,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:16,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:08:16,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:08:16,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:08:16,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 86 transitions, 530 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:16,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:16,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:08:16,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:17,261 INFO L124 PetriNetUnfolderBase]: 2091/3225 cut-off events. [2024-06-21 16:08:17,262 INFO L125 PetriNetUnfolderBase]: For 40929/40929 co-relation queries the response was YES. [2024-06-21 16:08:17,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15265 conditions, 3225 events. 2091/3225 cut-off events. For 40929/40929 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 16188 event pairs, 718 based on Foata normal form. 2/3225 useless extension candidates. Maximal degree in co-relation 15231. Up to 2994 conditions per place. [2024-06-21 16:08:17,278 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 98 selfloop transitions, 17 changer transitions 0/121 dead transitions. [2024-06-21 16:08:17,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 121 transitions, 874 flow [2024-06-21 16:08:17,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:08:17,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:08:17,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-21 16:08:17,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-21 16:08:17,280 INFO L175 Difference]: Start difference. First operand has 81 places, 86 transitions, 530 flow. Second operand 8 states and 157 transitions. [2024-06-21 16:08:17,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 121 transitions, 874 flow [2024-06-21 16:08:17,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 121 transitions, 848 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 16:08:17,298 INFO L231 Difference]: Finished difference. Result has 86 places, 89 transitions, 584 flow [2024-06-21 16:08:17,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=504, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=584, PETRI_PLACES=86, PETRI_TRANSITIONS=89} [2024-06-21 16:08:17,299 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 42 predicate places. [2024-06-21 16:08:17,299 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 89 transitions, 584 flow [2024-06-21 16:08:17,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:17,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:17,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:17,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 16:08:17,300 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 16:08:17,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:17,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1731721946, now seen corresponding path program 1 times [2024-06-21 16:08:17,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:17,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768458152] [2024-06-21 16:08:17,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:17,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:17,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:18,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:08:18,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:18,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768458152] [2024-06-21 16:08:18,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768458152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:18,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:18,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:08:18,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865111190] [2024-06-21 16:08:18,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:18,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:08:18,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:18,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:08:18,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:08:18,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:08:18,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 89 transitions, 584 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:18,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:18,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:08:18,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:18,894 INFO L124 PetriNetUnfolderBase]: 2136/3283 cut-off events. [2024-06-21 16:08:18,894 INFO L125 PetriNetUnfolderBase]: For 47164/47167 co-relation queries the response was YES. [2024-06-21 16:08:18,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16253 conditions, 3283 events. 2136/3283 cut-off events. For 47164/47167 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 16463 event pairs, 687 based on Foata normal form. 4/3281 useless extension candidates. Maximal degree in co-relation 16218. Up to 2886 conditions per place. [2024-06-21 16:08:18,910 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 83 selfloop transitions, 40 changer transitions 0/129 dead transitions. [2024-06-21 16:08:18,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 129 transitions, 1046 flow [2024-06-21 16:08:18,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:08:18,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:08:18,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-21 16:08:18,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796511627906977 [2024-06-21 16:08:18,912 INFO L175 Difference]: Start difference. First operand has 86 places, 89 transitions, 584 flow. Second operand 8 states and 165 transitions. [2024-06-21 16:08:18,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 129 transitions, 1046 flow [2024-06-21 16:08:18,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 129 transitions, 990 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 16:08:18,936 INFO L231 Difference]: Finished difference. Result has 88 places, 95 transitions, 686 flow [2024-06-21 16:08:18,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=528, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=686, PETRI_PLACES=88, PETRI_TRANSITIONS=95} [2024-06-21 16:08:18,937 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 44 predicate places. [2024-06-21 16:08:18,937 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 95 transitions, 686 flow [2024-06-21 16:08:18,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:18,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:18,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:18,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 16:08:18,937 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 16:08:18,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:18,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1731721760, now seen corresponding path program 2 times [2024-06-21 16:08:18,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:18,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063154833] [2024-06-21 16:08:18,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:18,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:18,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:19,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:08:19,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:19,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063154833] [2024-06-21 16:08:19,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063154833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:19,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:19,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:08:19,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64711580] [2024-06-21 16:08:19,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:19,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:08:19,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:19,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:08:19,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:08:20,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:08:20,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 95 transitions, 686 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:20,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:20,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:08:20,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:20,573 INFO L124 PetriNetUnfolderBase]: 2176/3343 cut-off events. [2024-06-21 16:08:20,573 INFO L125 PetriNetUnfolderBase]: For 54154/54157 co-relation queries the response was YES. [2024-06-21 16:08:20,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17355 conditions, 3343 events. 2176/3343 cut-off events. For 54154/54157 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 16818 event pairs, 706 based on Foata normal form. 6/3344 useless extension candidates. Maximal degree in co-relation 17319. Up to 2981 conditions per place. [2024-06-21 16:08:20,592 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 93 selfloop transitions, 40 changer transitions 0/139 dead transitions. [2024-06-21 16:08:20,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 139 transitions, 1292 flow [2024-06-21 16:08:20,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:08:20,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:08:20,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-21 16:08:20,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48255813953488375 [2024-06-21 16:08:20,594 INFO L175 Difference]: Start difference. First operand has 88 places, 95 transitions, 686 flow. Second operand 8 states and 166 transitions. [2024-06-21 16:08:20,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 139 transitions, 1292 flow [2024-06-21 16:08:20,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 139 transitions, 1228 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 16:08:20,620 INFO L231 Difference]: Finished difference. Result has 92 places, 104 transitions, 830 flow [2024-06-21 16:08:20,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=622, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=830, PETRI_PLACES=92, PETRI_TRANSITIONS=104} [2024-06-21 16:08:20,621 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 48 predicate places. [2024-06-21 16:08:20,621 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 104 transitions, 830 flow [2024-06-21 16:08:20,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:20,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:20,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:20,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 16:08:20,622 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 16:08:20,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:20,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1736370086, now seen corresponding path program 2 times [2024-06-21 16:08:20,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:20,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405971121] [2024-06-21 16:08:20,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:20,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:20,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:21,500 INFO 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 16:08:21,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:21,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405971121] [2024-06-21 16:08:21,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405971121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:21,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:21,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:08:21,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548244225] [2024-06-21 16:08:21,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:21,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:08:21,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:21,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:08:21,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:08:21,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:08:21,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 104 transitions, 830 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:21,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:21,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:08:21,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:22,290 INFO L124 PetriNetUnfolderBase]: 2196/3377 cut-off events. [2024-06-21 16:08:22,290 INFO L125 PetriNetUnfolderBase]: For 61201/61204 co-relation queries the response was YES. [2024-06-21 16:08:22,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18222 conditions, 3377 events. 2196/3377 cut-off events. For 61201/61204 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17003 event pairs, 692 based on Foata normal form. 4/3375 useless extension candidates. Maximal degree in co-relation 18184. Up to 3069 conditions per place. [2024-06-21 16:08:22,315 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 101 selfloop transitions, 29 changer transitions 0/136 dead transitions. [2024-06-21 16:08:22,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 136 transitions, 1200 flow [2024-06-21 16:08:22,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:08:22,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:08:22,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-21 16:08:22,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-21 16:08:22,338 INFO L175 Difference]: Start difference. First operand has 92 places, 104 transitions, 830 flow. Second operand 8 states and 158 transitions. [2024-06-21 16:08:22,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 136 transitions, 1200 flow [2024-06-21 16:08:22,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 136 transitions, 1142 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-21 16:08:22,377 INFO L231 Difference]: Finished difference. Result has 97 places, 107 transitions, 876 flow [2024-06-21 16:08:22,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=772, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=876, PETRI_PLACES=97, PETRI_TRANSITIONS=107} [2024-06-21 16:08:22,378 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 53 predicate places. [2024-06-21 16:08:22,378 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 107 transitions, 876 flow [2024-06-21 16:08:22,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:22,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:22,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:22,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 16:08:22,378 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 16:08:22,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:22,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1736363390, now seen corresponding path program 3 times [2024-06-21 16:08:22,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:22,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297379420] [2024-06-21 16:08:22,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:22,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:22,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:23,336 INFO 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 16:08:23,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:23,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297379420] [2024-06-21 16:08:23,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297379420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:23,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:23,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:08:23,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500031947] [2024-06-21 16:08:23,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:23,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:08:23,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:23,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:08:23,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:08:23,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:08:23,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 107 transitions, 876 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:23,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:23,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:08:23,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:23,995 INFO L124 PetriNetUnfolderBase]: 2218/3410 cut-off events. [2024-06-21 16:08:23,995 INFO L125 PetriNetUnfolderBase]: For 66848/66851 co-relation queries the response was YES. [2024-06-21 16:08:24,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18764 conditions, 3410 events. 2218/3410 cut-off events. For 66848/66851 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17210 event pairs, 709 based on Foata normal form. 6/3411 useless extension candidates. Maximal degree in co-relation 18724. Up to 3160 conditions per place. [2024-06-21 16:08:24,015 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 109 selfloop transitions, 22 changer transitions 0/137 dead transitions. [2024-06-21 16:08:24,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 137 transitions, 1248 flow [2024-06-21 16:08:24,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:08:24,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:08:24,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 16:08:24,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-21 16:08:24,017 INFO L175 Difference]: Start difference. First operand has 97 places, 107 transitions, 876 flow. Second operand 8 states and 154 transitions. [2024-06-21 16:08:24,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 137 transitions, 1248 flow [2024-06-21 16:08:24,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 137 transitions, 1174 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 16:08:24,048 INFO L231 Difference]: Finished difference. Result has 99 places, 110 transitions, 898 flow [2024-06-21 16:08:24,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=802, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=898, PETRI_PLACES=99, PETRI_TRANSITIONS=110} [2024-06-21 16:08:24,049 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 55 predicate places. [2024-06-21 16:08:24,049 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 110 transitions, 898 flow [2024-06-21 16:08:24,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:24,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:24,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:24,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 16:08:24,050 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:08:24,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:24,050 INFO L85 PathProgramCache]: Analyzing trace with hash 416133668, now seen corresponding path program 3 times [2024-06-21 16:08:24,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:24,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775153724] [2024-06-21 16:08:24,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:24,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:24,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:24,826 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 16:08:24,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:24,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775153724] [2024-06-21 16:08:24,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775153724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:24,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:24,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:08:24,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947576379] [2024-06-21 16:08:24,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:24,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:08:24,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:24,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:08:24,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:08:24,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:08:24,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 110 transitions, 898 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:24,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:24,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:08:24,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:25,558 INFO L124 PetriNetUnfolderBase]: 2240/3441 cut-off events. [2024-06-21 16:08:25,558 INFO L125 PetriNetUnfolderBase]: For 73054/73057 co-relation queries the response was YES. [2024-06-21 16:08:25,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19197 conditions, 3441 events. 2240/3441 cut-off events. For 73054/73057 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17393 event pairs, 690 based on Foata normal form. 4/3439 useless extension candidates. Maximal degree in co-relation 19156. Up to 3106 conditions per place. [2024-06-21 16:08:25,581 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 103 selfloop transitions, 34 changer transitions 0/143 dead transitions. [2024-06-21 16:08:25,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 143 transitions, 1292 flow [2024-06-21 16:08:25,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:08:25,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:08:25,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-21 16:08:25,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680232558139535 [2024-06-21 16:08:25,584 INFO L175 Difference]: Start difference. First operand has 99 places, 110 transitions, 898 flow. Second operand 8 states and 161 transitions. [2024-06-21 16:08:25,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 143 transitions, 1292 flow [2024-06-21 16:08:25,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 143 transitions, 1230 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 16:08:25,630 INFO L231 Difference]: Finished difference. Result has 101 places, 113 transitions, 956 flow [2024-06-21 16:08:25,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=836, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=956, PETRI_PLACES=101, PETRI_TRANSITIONS=113} [2024-06-21 16:08:25,630 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 57 predicate places. [2024-06-21 16:08:25,630 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 113 transitions, 956 flow [2024-06-21 16:08:25,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:25,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:25,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:25,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 16:08:25,631 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 16:08:25,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:25,631 INFO L85 PathProgramCache]: Analyzing trace with hash 767460596, now seen corresponding path program 4 times [2024-06-21 16:08:25,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:25,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479083917] [2024-06-21 16:08:25,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:25,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:25,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:26,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:08:26,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:26,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479083917] [2024-06-21 16:08:26,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479083917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:26,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:26,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:08:26,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111117567] [2024-06-21 16:08:26,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:26,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:08:26,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:26,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:08:26,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:08:26,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:08:26,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 113 transitions, 956 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:26,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:26,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:08:26,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:27,272 INFO L124 PetriNetUnfolderBase]: 2262/3478 cut-off events. [2024-06-21 16:08:27,273 INFO L125 PetriNetUnfolderBase]: For 79765/79765 co-relation queries the response was YES. [2024-06-21 16:08:27,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19760 conditions, 3478 events. 2262/3478 cut-off events. For 79765/79765 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17576 event pairs, 705 based on Foata normal form. 4/3478 useless extension candidates. Maximal degree in co-relation 19718. Up to 3207 conditions per place. [2024-06-21 16:08:27,293 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 114 selfloop transitions, 22 changer transitions 0/142 dead transitions. [2024-06-21 16:08:27,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 142 transitions, 1342 flow [2024-06-21 16:08:27,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:08:27,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:08:27,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 16:08:27,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-21 16:08:27,295 INFO L175 Difference]: Start difference. First operand has 101 places, 113 transitions, 956 flow. Second operand 8 states and 153 transitions. [2024-06-21 16:08:27,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 142 transitions, 1342 flow [2024-06-21 16:08:27,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 142 transitions, 1252 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 16:08:27,344 INFO L231 Difference]: Finished difference. Result has 103 places, 116 transitions, 968 flow [2024-06-21 16:08:27,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=866, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=968, PETRI_PLACES=103, PETRI_TRANSITIONS=116} [2024-06-21 16:08:27,345 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 59 predicate places. [2024-06-21 16:08:27,345 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 116 transitions, 968 flow [2024-06-21 16:08:27,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:27,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:27,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:27,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 16:08:27,345 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 16:08:27,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:27,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1767544470, now seen corresponding path program 4 times [2024-06-21 16:08:27,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:27,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031713598] [2024-06-21 16:08:27,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:27,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:27,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:28,204 INFO 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 16:08:28,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:28,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031713598] [2024-06-21 16:08:28,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031713598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:28,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:28,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:08:28,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586099925] [2024-06-21 16:08:28,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:28,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:08:28,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:28,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:08:28,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:08:28,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:08:28,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 116 transitions, 968 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:28,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:28,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:08:28,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:28,845 INFO L124 PetriNetUnfolderBase]: 2252/3459 cut-off events. [2024-06-21 16:08:28,845 INFO L125 PetriNetUnfolderBase]: For 85243/85243 co-relation queries the response was YES. [2024-06-21 16:08:28,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19826 conditions, 3459 events. 2252/3459 cut-off events. For 85243/85243 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17467 event pairs, 713 based on Foata normal form. 4/3459 useless extension candidates. Maximal degree in co-relation 19783. Up to 3234 conditions per place. [2024-06-21 16:08:28,871 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 117 selfloop transitions, 17 changer transitions 0/140 dead transitions. [2024-06-21 16:08:28,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 140 transitions, 1300 flow [2024-06-21 16:08:28,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:08:28,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:08:28,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 16:08:28,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-21 16:08:28,872 INFO L175 Difference]: Start difference. First operand has 103 places, 116 transitions, 968 flow. Second operand 8 states and 149 transitions. [2024-06-21 16:08:28,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 140 transitions, 1300 flow [2024-06-21 16:08:28,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 140 transitions, 1216 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-21 16:08:28,932 INFO L231 Difference]: Finished difference. Result has 105 places, 116 transitions, 926 flow [2024-06-21 16:08:28,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=884, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=926, PETRI_PLACES=105, PETRI_TRANSITIONS=116} [2024-06-21 16:08:28,933 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 61 predicate places. [2024-06-21 16:08:28,933 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 116 transitions, 926 flow [2024-06-21 16:08:28,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:28,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:28,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:28,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 16:08:28,934 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 16:08:28,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:28,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1759263564, now seen corresponding path program 5 times [2024-06-21 16:08:28,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:28,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944074013] [2024-06-21 16:08:28,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:28,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:28,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:29,661 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 16:08:29,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:29,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944074013] [2024-06-21 16:08:29,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944074013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:29,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:29,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:08:29,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903325534] [2024-06-21 16:08:29,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:29,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:08:29,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:29,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:08:29,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:08:29,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:08:29,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 116 transitions, 926 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:29,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:29,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:08:29,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:30,422 INFO L124 PetriNetUnfolderBase]: 2274/3496 cut-off events. [2024-06-21 16:08:30,423 INFO L125 PetriNetUnfolderBase]: For 92200/92200 co-relation queries the response was YES. [2024-06-21 16:08:30,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20218 conditions, 3496 events. 2274/3496 cut-off events. For 92200/92200 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17681 event pairs, 708 based on Foata normal form. 4/3496 useless extension candidates. Maximal degree in co-relation 20174. Up to 3252 conditions per place. [2024-06-21 16:08:30,445 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 121 selfloop transitions, 17 changer transitions 0/144 dead transitions. [2024-06-21 16:08:30,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 144 transitions, 1318 flow [2024-06-21 16:08:30,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:08:30,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:08:30,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 16:08:30,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-21 16:08:30,446 INFO L175 Difference]: Start difference. First operand has 105 places, 116 transitions, 926 flow. Second operand 8 states and 150 transitions. [2024-06-21 16:08:30,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 144 transitions, 1318 flow [2024-06-21 16:08:30,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 144 transitions, 1252 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 16:08:30,496 INFO L231 Difference]: Finished difference. Result has 106 places, 119 transitions, 958 flow [2024-06-21 16:08:30,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=860, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=958, PETRI_PLACES=106, PETRI_TRANSITIONS=119} [2024-06-21 16:08:30,497 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 62 predicate places. [2024-06-21 16:08:30,497 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 119 transitions, 958 flow [2024-06-21 16:08:30,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:30,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:30,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:30,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 16:08:30,497 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 16:08:30,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:30,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1767544284, now seen corresponding path program 6 times [2024-06-21 16:08:30,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:30,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125518692] [2024-06-21 16:08:30,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:30,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:30,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:31,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:08:31,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:31,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125518692] [2024-06-21 16:08:31,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125518692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:31,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:31,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:08:31,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78608272] [2024-06-21 16:08:31,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:31,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:08:31,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:31,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:08:31,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:08:31,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:08:31,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 119 transitions, 958 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:31,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:31,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:08:31,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:31,932 INFO L124 PetriNetUnfolderBase]: 2264/3480 cut-off events. [2024-06-21 16:08:31,932 INFO L125 PetriNetUnfolderBase]: For 98186/98186 co-relation queries the response was YES. [2024-06-21 16:08:31,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20334 conditions, 3480 events. 2264/3480 cut-off events. For 98186/98186 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17575 event pairs, 701 based on Foata normal form. 4/3480 useless extension candidates. Maximal degree in co-relation 20289. Up to 3161 conditions per place. [2024-06-21 16:08:31,955 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 109 selfloop transitions, 30 changer transitions 0/145 dead transitions. [2024-06-21 16:08:31,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 145 transitions, 1306 flow [2024-06-21 16:08:31,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:08:31,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:08:31,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 16:08:31,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-21 16:08:31,957 INFO L175 Difference]: Start difference. First operand has 106 places, 119 transitions, 958 flow. Second operand 8 states and 154 transitions. [2024-06-21 16:08:31,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 145 transitions, 1306 flow [2024-06-21 16:08:32,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 145 transitions, 1224 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 16:08:32,014 INFO L231 Difference]: Finished difference. Result has 108 places, 119 transitions, 944 flow [2024-06-21 16:08:32,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=876, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=944, PETRI_PLACES=108, PETRI_TRANSITIONS=119} [2024-06-21 16:08:32,015 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 64 predicate places. [2024-06-21 16:08:32,016 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 119 transitions, 944 flow [2024-06-21 16:08:32,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:32,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:32,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:32,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 16:08:32,020 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 16:08:32,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:32,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1758955734, now seen corresponding path program 1 times [2024-06-21 16:08:32,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:32,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281806171] [2024-06-21 16:08:32,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:32,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:32,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:33,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:08:33,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:33,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281806171] [2024-06-21 16:08:33,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281806171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:33,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:33,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:08:33,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100952495] [2024-06-21 16:08:33,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:33,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:08:33,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:33,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:08:33,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:08:33,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:08:33,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 119 transitions, 944 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 16:08:33,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:33,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:08:33,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:33,977 INFO L124 PetriNetUnfolderBase]: 2682/4048 cut-off events. [2024-06-21 16:08:33,978 INFO L125 PetriNetUnfolderBase]: For 121253/121253 co-relation queries the response was YES. [2024-06-21 16:08:33,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23577 conditions, 4048 events. 2682/4048 cut-off events. For 121253/121253 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 19767 event pairs, 867 based on Foata normal form. 4/4048 useless extension candidates. Maximal degree in co-relation 23531. Up to 3841 conditions per place. [2024-06-21 16:08:34,003 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 125 selfloop transitions, 18 changer transitions 0/148 dead transitions. [2024-06-21 16:08:34,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 148 transitions, 1348 flow [2024-06-21 16:08:34,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:08:34,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:08:34,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 16:08:34,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-21 16:08:34,004 INFO L175 Difference]: Start difference. First operand has 108 places, 119 transitions, 944 flow. Second operand 8 states and 142 transitions. [2024-06-21 16:08:34,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 148 transitions, 1348 flow [2024-06-21 16:08:34,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 148 transitions, 1230 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-21 16:08:34,072 INFO L231 Difference]: Finished difference. Result has 110 places, 124 transitions, 937 flow [2024-06-21 16:08:34,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=830, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=937, PETRI_PLACES=110, PETRI_TRANSITIONS=124} [2024-06-21 16:08:34,073 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 66 predicate places. [2024-06-21 16:08:34,073 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 124 transitions, 937 flow [2024-06-21 16:08:34,073 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 16:08:34,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:34,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:34,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 16:08:34,074 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:08:34,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:34,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1023178354, now seen corresponding path program 1 times [2024-06-21 16:08:34,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:34,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635512786] [2024-06-21 16:08:34,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:34,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:34,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:34,606 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 16:08:34,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:34,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635512786] [2024-06-21 16:08:34,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635512786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:34,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:34,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:08:34,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312470372] [2024-06-21 16:08:34,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:34,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:08:34,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:34,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:08:34,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:08:34,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:08:34,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 124 transitions, 937 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states 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 16:08:34,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:34,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:08:34,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:35,337 INFO L124 PetriNetUnfolderBase]: 2564/3931 cut-off events. [2024-06-21 16:08:35,338 INFO L125 PetriNetUnfolderBase]: For 126649/126649 co-relation queries the response was YES. [2024-06-21 16:08:35,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23091 conditions, 3931 events. 2564/3931 cut-off events. For 126649/126649 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 19505 event pairs, 932 based on Foata normal form. 3/3932 useless extension candidates. Maximal degree in co-relation 23043. Up to 3709 conditions per place. [2024-06-21 16:08:35,366 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 101 selfloop transitions, 11 changer transitions 0/138 dead transitions. [2024-06-21 16:08:35,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 138 transitions, 1213 flow [2024-06-21 16:08:35,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:08:35,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:08:35,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-21 16:08:35,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42248062015503873 [2024-06-21 16:08:35,367 INFO L175 Difference]: Start difference. First operand has 110 places, 124 transitions, 937 flow. Second operand 6 states and 109 transitions. [2024-06-21 16:08:35,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 138 transitions, 1213 flow [2024-06-21 16:08:35,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 138 transitions, 1150 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 16:08:35,440 INFO L231 Difference]: Finished difference. Result has 111 places, 127 transitions, 934 flow [2024-06-21 16:08:35,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=874, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=934, PETRI_PLACES=111, PETRI_TRANSITIONS=127} [2024-06-21 16:08:35,441 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 67 predicate places. [2024-06-21 16:08:35,441 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 127 transitions, 934 flow [2024-06-21 16:08:35,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states 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 16:08:35,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:35,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:35,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 16:08:35,442 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:08:35,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:35,442 INFO L85 PathProgramCache]: Analyzing trace with hash 2139958656, now seen corresponding path program 1 times [2024-06-21 16:08:35,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:35,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570815878] [2024-06-21 16:08:35,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:35,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:35,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:36,792 INFO 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 16:08:36,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:36,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570815878] [2024-06-21 16:08:36,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570815878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:36,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:36,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:08:36,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379173217] [2024-06-21 16:08:36,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:36,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:08:36,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:36,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:08:36,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:08:36,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:08:36,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 127 transitions, 934 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 16:08:36,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:36,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:08:36,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:37,780 INFO L124 PetriNetUnfolderBase]: 2521/3856 cut-off events. [2024-06-21 16:08:37,780 INFO L125 PetriNetUnfolderBase]: For 131114/131114 co-relation queries the response was YES. [2024-06-21 16:08:37,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23455 conditions, 3856 events. 2521/3856 cut-off events. For 131114/131114 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 19565 event pairs, 793 based on Foata normal form. 2/3845 useless extension candidates. Maximal degree in co-relation 23406. Up to 3570 conditions per place. [2024-06-21 16:08:37,804 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 131 selfloop transitions, 21 changer transitions 0/159 dead transitions. [2024-06-21 16:08:37,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 159 transitions, 1320 flow [2024-06-21 16:08:37,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:08:37,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:08:37,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-21 16:08:37,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622093023255814 [2024-06-21 16:08:37,805 INFO L175 Difference]: Start difference. First operand has 111 places, 127 transitions, 934 flow. Second operand 8 states and 159 transitions. [2024-06-21 16:08:37,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 159 transitions, 1320 flow [2024-06-21 16:08:37,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 159 transitions, 1266 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-21 16:08:37,877 INFO L231 Difference]: Finished difference. Result has 115 places, 127 transitions, 933 flow [2024-06-21 16:08:37,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=880, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=933, PETRI_PLACES=115, PETRI_TRANSITIONS=127} [2024-06-21 16:08:37,878 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 71 predicate places. [2024-06-21 16:08:37,878 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 127 transitions, 933 flow [2024-06-21 16:08:37,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 16:08:37,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:37,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:37,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 16:08:37,878 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 16:08:37,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:37,879 INFO L85 PathProgramCache]: Analyzing trace with hash 2140049021, now seen corresponding path program 1 times [2024-06-21 16:08:37,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:37,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062891966] [2024-06-21 16:08:37,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:37,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:37,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:38,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:08:38,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:38,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062891966] [2024-06-21 16:08:38,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062891966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:38,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:38,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:08:38,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810355336] [2024-06-21 16:08:38,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:38,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:08:38,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:38,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:08:38,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:08:39,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:08:39,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 127 transitions, 933 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 16:08:39,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:39,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:08:39,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:39,726 INFO L124 PetriNetUnfolderBase]: 2569/3917 cut-off events. [2024-06-21 16:08:39,726 INFO L125 PetriNetUnfolderBase]: For 143198/143198 co-relation queries the response was YES. [2024-06-21 16:08:39,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24104 conditions, 3917 events. 2569/3917 cut-off events. For 143198/143198 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 19912 event pairs, 785 based on Foata normal form. 8/3906 useless extension candidates. Maximal degree in co-relation 24054. Up to 3592 conditions per place. [2024-06-21 16:08:39,752 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 137 selfloop transitions, 24 changer transitions 0/168 dead transitions. [2024-06-21 16:08:39,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 168 transitions, 1399 flow [2024-06-21 16:08:39,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:08:39,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:08:39,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-21 16:08:39,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4599483204134367 [2024-06-21 16:08:39,754 INFO L175 Difference]: Start difference. First operand has 115 places, 127 transitions, 933 flow. Second operand 9 states and 178 transitions. [2024-06-21 16:08:39,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 168 transitions, 1399 flow [2024-06-21 16:08:39,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 168 transitions, 1347 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 16:08:39,808 INFO L231 Difference]: Finished difference. Result has 117 places, 130 transitions, 986 flow [2024-06-21 16:08:39,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=881, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=986, PETRI_PLACES=117, PETRI_TRANSITIONS=130} [2024-06-21 16:08:39,808 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 73 predicate places. [2024-06-21 16:08:39,808 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 130 transitions, 986 flow [2024-06-21 16:08:39,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 16:08:39,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:39,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:39,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 16:08:39,809 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 16:08:39,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:39,809 INFO L85 PathProgramCache]: Analyzing trace with hash 2143768091, now seen corresponding path program 2 times [2024-06-21 16:08:39,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:39,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191960871] [2024-06-21 16:08:39,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:39,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:39,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:40,839 INFO 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 16:08:40,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:40,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191960871] [2024-06-21 16:08:40,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191960871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:40,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:40,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:08:40,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626935534] [2024-06-21 16:08:40,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:40,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:08:40,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:40,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:08:40,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:08:40,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:08:40,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 130 transitions, 986 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 16:08:40,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:40,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:08:40,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:41,595 INFO L124 PetriNetUnfolderBase]: 2753/4194 cut-off events. [2024-06-21 16:08:41,595 INFO L125 PetriNetUnfolderBase]: For 162138/162141 co-relation queries the response was YES. [2024-06-21 16:08:41,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26751 conditions, 4194 events. 2753/4194 cut-off events. For 162138/162141 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 21579 event pairs, 688 based on Foata normal form. 8/4188 useless extension candidates. Maximal degree in co-relation 26700. Up to 3278 conditions per place. [2024-06-21 16:08:41,625 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 106 selfloop transitions, 72 changer transitions 0/185 dead transitions. [2024-06-21 16:08:41,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 185 transitions, 1846 flow [2024-06-21 16:08:41,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:08:41,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:08:41,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-21 16:08:41,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5012919896640827 [2024-06-21 16:08:41,627 INFO L175 Difference]: Start difference. First operand has 117 places, 130 transitions, 986 flow. Second operand 9 states and 194 transitions. [2024-06-21 16:08:41,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 185 transitions, 1846 flow [2024-06-21 16:08:41,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 185 transitions, 1769 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-21 16:08:41,706 INFO L231 Difference]: Finished difference. Result has 119 places, 139 transitions, 1211 flow [2024-06-21 16:08:41,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=909, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1211, PETRI_PLACES=119, PETRI_TRANSITIONS=139} [2024-06-21 16:08:41,707 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 75 predicate places. [2024-06-21 16:08:41,707 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 139 transitions, 1211 flow [2024-06-21 16:08:41,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 16:08:41,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:41,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:41,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 16:08:41,708 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 16:08:41,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:41,708 INFO L85 PathProgramCache]: Analyzing trace with hash 2143773671, now seen corresponding path program 3 times [2024-06-21 16:08:41,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:41,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738094472] [2024-06-21 16:08:41,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:41,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:41,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:42,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:08:42,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:42,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738094472] [2024-06-21 16:08:42,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738094472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:42,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:42,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:08:42,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612446708] [2024-06-21 16:08:42,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:42,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:08:42,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:42,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:08:42,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:08:42,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:08:42,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 139 transitions, 1211 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 16:08:42,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:42,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:08:42,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:43,524 INFO L124 PetriNetUnfolderBase]: 2733/4166 cut-off events. [2024-06-21 16:08:43,524 INFO L125 PetriNetUnfolderBase]: For 171973/171976 co-relation queries the response was YES. [2024-06-21 16:08:43,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27266 conditions, 4166 events. 2733/4166 cut-off events. For 171973/171976 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 21398 event pairs, 698 based on Foata normal form. 8/4160 useless extension candidates. Maximal degree in co-relation 27214. Up to 3266 conditions per place. [2024-06-21 16:08:43,552 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 101 selfloop transitions, 74 changer transitions 0/182 dead transitions. [2024-06-21 16:08:43,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 182 transitions, 1805 flow [2024-06-21 16:08:43,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:08:43,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:08:43,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-21 16:08:43,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4909560723514212 [2024-06-21 16:08:43,554 INFO L175 Difference]: Start difference. First operand has 119 places, 139 transitions, 1211 flow. Second operand 9 states and 190 transitions. [2024-06-21 16:08:43,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 182 transitions, 1805 flow [2024-06-21 16:08:43,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 182 transitions, 1678 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-21 16:08:43,640 INFO L231 Difference]: Finished difference. Result has 124 places, 139 transitions, 1240 flow [2024-06-21 16:08:43,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1084, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1240, PETRI_PLACES=124, PETRI_TRANSITIONS=139} [2024-06-21 16:08:43,640 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 80 predicate places. [2024-06-21 16:08:43,641 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 139 transitions, 1240 flow [2024-06-21 16:08:43,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 16:08:43,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:43,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:43,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 16:08:43,641 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 16:08:43,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:43,642 INFO L85 PathProgramCache]: Analyzing trace with hash -2007101285, now seen corresponding path program 4 times [2024-06-21 16:08:43,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:43,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214986379] [2024-06-21 16:08:43,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:43,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:43,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:44,486 INFO 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 16:08:44,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:44,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214986379] [2024-06-21 16:08:44,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214986379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:44,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:44,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:08:44,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386732410] [2024-06-21 16:08:44,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:44,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:08:44,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:44,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:08:44,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:08:44,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:08:44,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 139 transitions, 1240 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 16:08:44,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:44,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:08:44,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:45,356 INFO L124 PetriNetUnfolderBase]: 2742/4181 cut-off events. [2024-06-21 16:08:45,356 INFO L125 PetriNetUnfolderBase]: For 179284/179287 co-relation queries the response was YES. [2024-06-21 16:08:45,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27599 conditions, 4181 events. 2742/4181 cut-off events. For 179284/179287 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 21499 event pairs, 822 based on Foata normal form. 8/4177 useless extension candidates. Maximal degree in co-relation 27545. Up to 3796 conditions per place. [2024-06-21 16:08:45,387 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 136 selfloop transitions, 34 changer transitions 0/177 dead transitions. [2024-06-21 16:08:45,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 177 transitions, 1732 flow [2024-06-21 16:08:45,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:08:45,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:08:45,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-21 16:08:45,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-21 16:08:45,389 INFO L175 Difference]: Start difference. First operand has 124 places, 139 transitions, 1240 flow. Second operand 9 states and 177 transitions. [2024-06-21 16:08:45,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 177 transitions, 1732 flow [2024-06-21 16:08:45,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 177 transitions, 1570 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 16:08:45,483 INFO L231 Difference]: Finished difference. Result has 125 places, 142 transitions, 1214 flow [2024-06-21 16:08:45,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1084, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1214, PETRI_PLACES=125, PETRI_TRANSITIONS=142} [2024-06-21 16:08:45,484 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 81 predicate places. [2024-06-21 16:08:45,484 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 142 transitions, 1214 flow [2024-06-21 16:08:45,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 16:08:45,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:45,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:45,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 16:08:45,485 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 16:08:45,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:45,485 INFO L85 PathProgramCache]: Analyzing trace with hash 15237137, now seen corresponding path program 5 times [2024-06-21 16:08:45,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:45,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141194518] [2024-06-21 16:08:45,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:45,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:45,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:46,451 INFO 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 16:08:46,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:46,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141194518] [2024-06-21 16:08:46,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141194518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:46,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:46,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:08:46,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929623231] [2024-06-21 16:08:46,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:46,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:08:46,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:46,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:08:46,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:08:46,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:08:46,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 142 transitions, 1214 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 16:08:46,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:46,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:08:46,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:47,258 INFO L124 PetriNetUnfolderBase]: 2819/4296 cut-off events. [2024-06-21 16:08:47,258 INFO L125 PetriNetUnfolderBase]: For 192857/192860 co-relation queries the response was YES. [2024-06-21 16:08:47,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28667 conditions, 4296 events. 2819/4296 cut-off events. For 192857/192860 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 22238 event pairs, 754 based on Foata normal form. 4/4286 useless extension candidates. Maximal degree in co-relation 28612. Up to 3844 conditions per place. [2024-06-21 16:08:47,291 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 137 selfloop transitions, 45 changer transitions 0/189 dead transitions. [2024-06-21 16:08:47,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 189 transitions, 1958 flow [2024-06-21 16:08:47,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:08:47,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:08:47,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-21 16:08:47,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4702842377260982 [2024-06-21 16:08:47,293 INFO L175 Difference]: Start difference. First operand has 125 places, 142 transitions, 1214 flow. Second operand 9 states and 182 transitions. [2024-06-21 16:08:47,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 189 transitions, 1958 flow [2024-06-21 16:08:47,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 189 transitions, 1830 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-21 16:08:47,402 INFO L231 Difference]: Finished difference. Result has 128 places, 152 transitions, 1364 flow [2024-06-21 16:08:47,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1116, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1364, PETRI_PLACES=128, PETRI_TRANSITIONS=152} [2024-06-21 16:08:47,403 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 84 predicate places. [2024-06-21 16:08:47,403 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 152 transitions, 1364 flow [2024-06-21 16:08:47,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 16:08:47,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:47,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:47,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 16:08:47,404 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 16:08:47,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:47,404 INFO L85 PathProgramCache]: Analyzing trace with hash -2007303095, now seen corresponding path program 6 times [2024-06-21 16:08:47,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:47,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124595332] [2024-06-21 16:08:47,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:47,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:47,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:48,293 INFO 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 16:08:48,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:48,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124595332] [2024-06-21 16:08:48,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124595332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:48,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:48,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:08:48,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047195320] [2024-06-21 16:08:48,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:48,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:08:48,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:48,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:08:48,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:08:48,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:08:48,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 152 transitions, 1364 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 16:08:48,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:48,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:08:48,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:49,149 INFO L124 PetriNetUnfolderBase]: 2840/4323 cut-off events. [2024-06-21 16:08:49,150 INFO L125 PetriNetUnfolderBase]: For 204924/204927 co-relation queries the response was YES. [2024-06-21 16:08:49,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29294 conditions, 4323 events. 2840/4323 cut-off events. For 204924/204927 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 22397 event pairs, 820 based on Foata normal form. 8/4319 useless extension candidates. Maximal degree in co-relation 29237. Up to 3795 conditions per place. [2024-06-21 16:08:49,181 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 135 selfloop transitions, 54 changer transitions 0/196 dead transitions. [2024-06-21 16:08:49,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 196 transitions, 2095 flow [2024-06-21 16:08:49,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:08:49,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:08:49,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-21 16:08:49,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4806201550387597 [2024-06-21 16:08:49,182 INFO L175 Difference]: Start difference. First operand has 128 places, 152 transitions, 1364 flow. Second operand 9 states and 186 transitions. [2024-06-21 16:08:49,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 196 transitions, 2095 flow [2024-06-21 16:08:49,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 196 transitions, 1972 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-21 16:08:49,310 INFO L231 Difference]: Finished difference. Result has 132 places, 158 transitions, 1485 flow [2024-06-21 16:08:49,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1245, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1485, PETRI_PLACES=132, PETRI_TRANSITIONS=158} [2024-06-21 16:08:49,311 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 88 predicate places. [2024-06-21 16:08:49,311 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 158 transitions, 1485 flow [2024-06-21 16:08:49,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 16:08:49,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:49,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:49,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 16:08:49,312 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 16:08:49,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:49,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1667104623, now seen corresponding path program 1 times [2024-06-21 16:08:49,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:49,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379943989] [2024-06-21 16:08:49,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:49,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:49,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:49,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:08:49,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:49,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379943989] [2024-06-21 16:08:49,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379943989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:49,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:49,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:08:49,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665950146] [2024-06-21 16:08:49,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:49,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:08:49,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:49,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:08:49,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:08:49,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:08:49,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 158 transitions, 1485 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states 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 16:08:49,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:49,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:08:49,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:50,587 INFO L124 PetriNetUnfolderBase]: 2947/4482 cut-off events. [2024-06-21 16:08:50,587 INFO L125 PetriNetUnfolderBase]: For 220170/220186 co-relation queries the response was YES. [2024-06-21 16:08:50,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30723 conditions, 4482 events. 2947/4482 cut-off events. For 220170/220186 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 22779 event pairs, 979 based on Foata normal form. 5/4452 useless extension candidates. Maximal degree in co-relation 30664. Up to 4235 conditions per place. [2024-06-21 16:08:50,622 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 137 selfloop transitions, 16 changer transitions 0/180 dead transitions. [2024-06-21 16:08:50,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 180 transitions, 1951 flow [2024-06-21 16:08:50,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:08:50,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:08:50,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-21 16:08:50,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-21 16:08:50,625 INFO L175 Difference]: Start difference. First operand has 132 places, 158 transitions, 1485 flow. Second operand 6 states and 116 transitions. [2024-06-21 16:08:50,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 180 transitions, 1951 flow [2024-06-21 16:08:50,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 180 transitions, 1842 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-21 16:08:50,728 INFO L231 Difference]: Finished difference. Result has 133 places, 164 transitions, 1472 flow [2024-06-21 16:08:50,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1376, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1472, PETRI_PLACES=133, PETRI_TRANSITIONS=164} [2024-06-21 16:08:50,728 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 89 predicate places. [2024-06-21 16:08:50,728 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 164 transitions, 1472 flow [2024-06-21 16:08:50,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states 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 16:08:50,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:50,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:50,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 16:08:50,729 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:08:50,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:50,729 INFO L85 PathProgramCache]: Analyzing trace with hash -954881991, now seen corresponding path program 7 times [2024-06-21 16:08:50,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:50,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244020702] [2024-06-21 16:08:50,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:50,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:50,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:51,705 INFO 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 16:08:51,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:51,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244020702] [2024-06-21 16:08:51,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244020702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:51,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:51,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:08:51,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719227343] [2024-06-21 16:08:51,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:51,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:08:51,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:51,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:08:51,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:08:51,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:08:51,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 164 transitions, 1472 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 16:08:51,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:51,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:08:51,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:52,698 INFO L124 PetriNetUnfolderBase]: 2920/4446 cut-off events. [2024-06-21 16:08:52,699 INFO L125 PetriNetUnfolderBase]: For 232833/232845 co-relation queries the response was YES. [2024-06-21 16:08:52,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31299 conditions, 4446 events. 2920/4446 cut-off events. For 232833/232845 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 23173 event pairs, 807 based on Foata normal form. 4/4429 useless extension candidates. Maximal degree in co-relation 31238. Up to 4112 conditions per place. [2024-06-21 16:08:52,732 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 162 selfloop transitions, 27 changer transitions 0/198 dead transitions. [2024-06-21 16:08:52,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 198 transitions, 1992 flow [2024-06-21 16:08:52,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:08:52,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:08:52,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 16:08:52,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 16:08:52,734 INFO L175 Difference]: Start difference. First operand has 133 places, 164 transitions, 1472 flow. Second operand 9 states and 171 transitions. [2024-06-21 16:08:52,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 198 transitions, 1992 flow [2024-06-21 16:08:52,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 198 transitions, 1964 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-21 16:08:52,884 INFO L231 Difference]: Finished difference. Result has 140 places, 167 transitions, 1570 flow [2024-06-21 16:08:52,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1444, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1570, PETRI_PLACES=140, PETRI_TRANSITIONS=167} [2024-06-21 16:08:52,884 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 96 predicate places. [2024-06-21 16:08:52,884 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 167 transitions, 1570 flow [2024-06-21 16:08:52,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 16:08:52,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:52,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:52,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 16:08:52,885 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:08:52,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:52,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1306936397, now seen corresponding path program 1 times [2024-06-21 16:08:52,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:52,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348003855] [2024-06-21 16:08:52,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:52,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:52,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:53,755 INFO 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 16:08:53,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:53,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348003855] [2024-06-21 16:08:53,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348003855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:53,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:53,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:08:53,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311369524] [2024-06-21 16:08:53,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:53,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:08:53,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:53,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:08:53,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:08:53,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:08:53,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 167 transitions, 1570 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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 16:08:53,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:53,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:08:53,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:54,710 INFO L124 PetriNetUnfolderBase]: 3196/4778 cut-off events. [2024-06-21 16:08:54,710 INFO L125 PetriNetUnfolderBase]: For 244857/244857 co-relation queries the response was YES. [2024-06-21 16:08:54,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33536 conditions, 4778 events. 3196/4778 cut-off events. For 244857/244857 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 23700 event pairs, 965 based on Foata normal form. 2/4774 useless extension candidates. Maximal degree in co-relation 33473. Up to 4567 conditions per place. [2024-06-21 16:08:54,748 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 168 selfloop transitions, 22 changer transitions 0/197 dead transitions. [2024-06-21 16:08:54,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 197 transitions, 2100 flow [2024-06-21 16:08:54,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:08:54,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:08:54,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 16:08:54,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-21 16:08:54,750 INFO L175 Difference]: Start difference. First operand has 140 places, 167 transitions, 1570 flow. Second operand 8 states and 143 transitions. [2024-06-21 16:08:54,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 197 transitions, 2100 flow [2024-06-21 16:08:54,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 197 transitions, 1996 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-21 16:08:54,990 INFO L231 Difference]: Finished difference. Result has 141 places, 173 transitions, 1622 flow [2024-06-21 16:08:54,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1472, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1622, PETRI_PLACES=141, PETRI_TRANSITIONS=173} [2024-06-21 16:08:54,991 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 97 predicate places. [2024-06-21 16:08:54,991 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 173 transitions, 1622 flow [2024-06-21 16:08:54,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 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 16:08:54,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:54,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:54,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 16:08:54,992 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 16:08:54,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:54,993 INFO L85 PathProgramCache]: Analyzing trace with hash 899198147, now seen corresponding path program 8 times [2024-06-21 16:08:54,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:54,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460048723] [2024-06-21 16:08:54,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:54,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:55,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:55,927 INFO 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 16:08:55,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:55,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460048723] [2024-06-21 16:08:55,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460048723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:55,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:55,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:08:55,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516147934] [2024-06-21 16:08:55,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:55,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:08:55,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:55,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:08:55,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:08:56,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:08:56,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 173 transitions, 1622 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 16:08:56,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:56,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:08:56,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:56,881 INFO L124 PetriNetUnfolderBase]: 2952/4498 cut-off events. [2024-06-21 16:08:56,881 INFO L125 PetriNetUnfolderBase]: For 256980/256984 co-relation queries the response was YES. [2024-06-21 16:08:56,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32569 conditions, 4498 events. 2952/4498 cut-off events. For 256980/256984 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 23553 event pairs, 806 based on Foata normal form. 12/4494 useless extension candidates. Maximal degree in co-relation 32505. Up to 4106 conditions per place. [2024-06-21 16:08:56,919 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 173 selfloop transitions, 25 changer transitions 0/207 dead transitions. [2024-06-21 16:08:56,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 207 transitions, 2176 flow [2024-06-21 16:08:56,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:08:56,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:08:56,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 16:08:56,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-21 16:08:56,921 INFO L175 Difference]: Start difference. First operand has 141 places, 173 transitions, 1622 flow. Second operand 9 states and 169 transitions. [2024-06-21 16:08:56,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 207 transitions, 2176 flow [2024-06-21 16:08:57,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 207 transitions, 2106 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 16:08:57,121 INFO L231 Difference]: Finished difference. Result has 144 places, 176 transitions, 1684 flow [2024-06-21 16:08:57,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1552, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1684, PETRI_PLACES=144, PETRI_TRANSITIONS=176} [2024-06-21 16:08:57,121 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 100 predicate places. [2024-06-21 16:08:57,122 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 176 transitions, 1684 flow [2024-06-21 16:08:57,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 16:08:57,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:57,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:57,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 16:08:57,122 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 16:08:57,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:57,122 INFO L85 PathProgramCache]: Analyzing trace with hash -955089381, now seen corresponding path program 9 times [2024-06-21 16:08:57,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:57,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974936134] [2024-06-21 16:08:57,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:57,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:57,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:58,096 INFO 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 16:08:58,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:58,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974936134] [2024-06-21 16:08:58,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974936134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:58,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:58,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:08:58,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228244046] [2024-06-21 16:08:58,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:58,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:08:58,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:58,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:08:58,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:08:58,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:08:58,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 176 transitions, 1684 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 16:08:58,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:58,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:08:58,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:58,964 INFO L124 PetriNetUnfolderBase]: 2996/4562 cut-off events. [2024-06-21 16:08:58,964 INFO L125 PetriNetUnfolderBase]: For 269536/269540 co-relation queries the response was YES. [2024-06-21 16:08:58,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33500 conditions, 4562 events. 2996/4562 cut-off events. For 269536/269540 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 24009 event pairs, 782 based on Foata normal form. 8/4554 useless extension candidates. Maximal degree in co-relation 33435. Up to 3934 conditions per place. [2024-06-21 16:08:59,001 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 157 selfloop transitions, 48 changer transitions 0/214 dead transitions. [2024-06-21 16:08:59,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 214 transitions, 2422 flow [2024-06-21 16:08:59,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:08:59,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:08:59,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-21 16:08:59,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-21 16:08:59,002 INFO L175 Difference]: Start difference. First operand has 144 places, 176 transitions, 1684 flow. Second operand 9 states and 177 transitions. [2024-06-21 16:08:59,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 214 transitions, 2422 flow [2024-06-21 16:08:59,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 214 transitions, 2330 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-21 16:08:59,228 INFO L231 Difference]: Finished difference. Result has 146 places, 179 transitions, 1770 flow [2024-06-21 16:08:59,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1592, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1770, PETRI_PLACES=146, PETRI_TRANSITIONS=179} [2024-06-21 16:08:59,229 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 102 predicate places. [2024-06-21 16:08:59,229 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 179 transitions, 1770 flow [2024-06-21 16:08:59,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 16:08:59,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:59,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:59,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 16:08:59,230 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 16:08:59,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:59,230 INFO L85 PathProgramCache]: Analyzing trace with hash -136645199, now seen corresponding path program 10 times [2024-06-21 16:08:59,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:59,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564231556] [2024-06-21 16:08:59,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:59,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:59,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:00,180 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 16:09:00,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:00,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564231556] [2024-06-21 16:09:00,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564231556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:00,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:00,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:09:00,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403397367] [2024-06-21 16:09:00,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:00,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:09:00,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:00,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:09:00,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:09:00,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:09:00,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 179 transitions, 1770 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 16:09:00,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:00,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:09:00,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:01,153 INFO L124 PetriNetUnfolderBase]: 3008/4580 cut-off events. [2024-06-21 16:09:01,154 INFO L125 PetriNetUnfolderBase]: For 279986/279990 co-relation queries the response was YES. [2024-06-21 16:09:01,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33794 conditions, 4580 events. 3008/4580 cut-off events. For 279986/279990 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 24149 event pairs, 778 based on Foata normal form. 8/4572 useless extension candidates. Maximal degree in co-relation 33728. Up to 3949 conditions per place. [2024-06-21 16:09:01,188 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 160 selfloop transitions, 49 changer transitions 0/218 dead transitions. [2024-06-21 16:09:01,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 218 transitions, 2536 flow [2024-06-21 16:09:01,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:09:01,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:09:01,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-21 16:09:01,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625322997416021 [2024-06-21 16:09:01,190 INFO L175 Difference]: Start difference. First operand has 146 places, 179 transitions, 1770 flow. Second operand 9 states and 179 transitions. [2024-06-21 16:09:01,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 218 transitions, 2536 flow [2024-06-21 16:09:01,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 218 transitions, 2275 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-21 16:09:01,357 INFO L231 Difference]: Finished difference. Result has 147 places, 182 transitions, 1695 flow [2024-06-21 16:09:01,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1527, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1695, PETRI_PLACES=147, PETRI_TRANSITIONS=182} [2024-06-21 16:09:01,357 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 103 predicate places. [2024-06-21 16:09:01,357 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 182 transitions, 1695 flow [2024-06-21 16:09:01,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 16:09:01,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:01,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:01,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 16:09:01,358 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:09:01,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:01,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1666716813, now seen corresponding path program 2 times [2024-06-21 16:09:01,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:01,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767940918] [2024-06-21 16:09:01,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:01,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:01,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:01,940 INFO 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 16:09:01,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:01,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767940918] [2024-06-21 16:09:01,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767940918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:01,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:01,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:09:01,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479619907] [2024-06-21 16:09:01,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:01,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:09:01,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:01,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:09:01,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:09:02,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:09:02,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 182 transitions, 1695 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states 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 16:09:02,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:02,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:09:02,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:02,789 INFO L124 PetriNetUnfolderBase]: 3111/4717 cut-off events. [2024-06-21 16:09:02,789 INFO L125 PetriNetUnfolderBase]: For 293545/293572 co-relation queries the response was YES. [2024-06-21 16:09:02,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34458 conditions, 4717 events. 3111/4717 cut-off events. For 293545/293572 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 24192 event pairs, 989 based on Foata normal form. 16/4686 useless extension candidates. Maximal degree in co-relation 34392. Up to 4490 conditions per place. [2024-06-21 16:09:02,823 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 153 selfloop transitions, 11 changer transitions 0/191 dead transitions. [2024-06-21 16:09:02,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 191 transitions, 2045 flow [2024-06-21 16:09:02,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:09:02,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:09:02,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-21 16:09:02,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41472868217054265 [2024-06-21 16:09:02,825 INFO L175 Difference]: Start difference. First operand has 147 places, 182 transitions, 1695 flow. Second operand 6 states and 107 transitions. [2024-06-21 16:09:02,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 191 transitions, 2045 flow [2024-06-21 16:09:03,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 191 transitions, 1920 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 16:09:03,004 INFO L231 Difference]: Finished difference. Result has 147 places, 182 transitions, 1598 flow [2024-06-21 16:09:03,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1570, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1598, PETRI_PLACES=147, PETRI_TRANSITIONS=182} [2024-06-21 16:09:03,005 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 103 predicate places. [2024-06-21 16:09:03,005 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 182 transitions, 1598 flow [2024-06-21 16:09:03,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states 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 16:09:03,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:03,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:03,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 16:09:03,005 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 16:09:03,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:03,006 INFO L85 PathProgramCache]: Analyzing trace with hash 727251693, now seen corresponding path program 1 times [2024-06-21 16:09:03,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:03,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752711024] [2024-06-21 16:09:03,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:03,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:03,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:03,476 INFO 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 16:09:03,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:03,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752711024] [2024-06-21 16:09:03,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752711024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:03,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:03,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:09:03,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747360239] [2024-06-21 16:09:03,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:03,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:09:03,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:03,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:09:03,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:09:03,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 16:09:03,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 182 transitions, 1598 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 16:09:03,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:03,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 16:09:03,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:04,333 INFO L124 PetriNetUnfolderBase]: 3547/5207 cut-off events. [2024-06-21 16:09:04,333 INFO L125 PetriNetUnfolderBase]: For 303929/303929 co-relation queries the response was YES. [2024-06-21 16:09:04,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36571 conditions, 5207 events. 3547/5207 cut-off events. For 303929/303929 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 25222 event pairs, 1086 based on Foata normal form. 1/5206 useless extension candidates. Maximal degree in co-relation 36504. Up to 5176 conditions per place. [2024-06-21 16:09:04,370 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 182 selfloop transitions, 16 changer transitions 0/201 dead transitions. [2024-06-21 16:09:04,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 201 transitions, 2172 flow [2024-06-21 16:09:04,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:09:04,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:09:04,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-21 16:09:04,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3992248062015504 [2024-06-21 16:09:04,371 INFO L175 Difference]: Start difference. First operand has 147 places, 182 transitions, 1598 flow. Second operand 6 states and 103 transitions. [2024-06-21 16:09:04,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 201 transitions, 2172 flow [2024-06-21 16:09:04,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 201 transitions, 2138 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 16:09:04,617 INFO L231 Difference]: Finished difference. Result has 148 places, 188 transitions, 1672 flow [2024-06-21 16:09:04,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1564, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1672, PETRI_PLACES=148, PETRI_TRANSITIONS=188} [2024-06-21 16:09:04,617 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 104 predicate places. [2024-06-21 16:09:04,617 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 188 transitions, 1672 flow [2024-06-21 16:09:04,618 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 16:09:04,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:04,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:04,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 16:09:04,619 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:09:04,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:04,619 INFO L85 PathProgramCache]: Analyzing trace with hash -278920159, now seen corresponding path program 2 times [2024-06-21 16:09:04,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:04,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73307810] [2024-06-21 16:09:04,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:04,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:04,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:05,066 INFO 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 16:09:05,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:05,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73307810] [2024-06-21 16:09:05,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73307810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:05,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:05,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:09:05,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669627767] [2024-06-21 16:09:05,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:05,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:09:05,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:05,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:09:05,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:09:05,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 16:09:05,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 188 transitions, 1672 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 16:09:05,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:05,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 16:09:05,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:05,996 INFO L124 PetriNetUnfolderBase]: 3544/5204 cut-off events. [2024-06-21 16:09:05,996 INFO L125 PetriNetUnfolderBase]: For 317558/317561 co-relation queries the response was YES. [2024-06-21 16:09:06,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37220 conditions, 5204 events. 3544/5204 cut-off events. For 317558/317561 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 25284 event pairs, 1089 based on Foata normal form. 3/5204 useless extension candidates. Maximal degree in co-relation 37152. Up to 5173 conditions per place. [2024-06-21 16:09:06,039 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 178 selfloop transitions, 16 changer transitions 0/197 dead transitions. [2024-06-21 16:09:06,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 197 transitions, 2082 flow [2024-06-21 16:09:06,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:09:06,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:09:06,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-21 16:09:06,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-21 16:09:06,040 INFO L175 Difference]: Start difference. First operand has 148 places, 188 transitions, 1672 flow. Second operand 6 states and 99 transitions. [2024-06-21 16:09:06,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 197 transitions, 2082 flow [2024-06-21 16:09:06,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 197 transitions, 2032 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-06-21 16:09:06,198 INFO L231 Difference]: Finished difference. Result has 152 places, 188 transitions, 1660 flow [2024-06-21 16:09:06,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1622, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1660, PETRI_PLACES=152, PETRI_TRANSITIONS=188} [2024-06-21 16:09:06,199 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 108 predicate places. [2024-06-21 16:09:06,199 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 188 transitions, 1660 flow [2024-06-21 16:09:06,199 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 16:09:06,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:06,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:06,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 16:09:06,200 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 16:09:06,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:06,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1914149405, now seen corresponding path program 1 times [2024-06-21 16:09:06,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:06,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029901584] [2024-06-21 16:09:06,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:06,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:06,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:07,354 INFO 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 16:09:07,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:07,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029901584] [2024-06-21 16:09:07,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029901584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:07,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:07,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:09:07,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702464533] [2024-06-21 16:09:07,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:07,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:09:07,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:07,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:09:07,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:09:07,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:09:07,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 188 transitions, 1660 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:07,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:07,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:09:07,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:08,425 INFO L124 PetriNetUnfolderBase]: 3070/4668 cut-off events. [2024-06-21 16:09:08,425 INFO L125 PetriNetUnfolderBase]: For 329198/329198 co-relation queries the response was YES. [2024-06-21 16:09:08,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35151 conditions, 4668 events. 3070/4668 cut-off events. For 329198/329198 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 24547 event pairs, 676 based on Foata normal form. 4/4659 useless extension candidates. Maximal degree in co-relation 35081. Up to 4280 conditions per place. [2024-06-21 16:09:08,463 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 198 selfloop transitions, 27 changer transitions 0/236 dead transitions. [2024-06-21 16:09:08,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 236 transitions, 2476 flow [2024-06-21 16:09:08,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:09:08,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:09:08,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-21 16:09:08,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-21 16:09:08,465 INFO L175 Difference]: Start difference. First operand has 152 places, 188 transitions, 1660 flow. Second operand 10 states and 196 transitions. [2024-06-21 16:09:08,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 236 transitions, 2476 flow [2024-06-21 16:09:08,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 236 transitions, 2430 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 16:09:08,667 INFO L231 Difference]: Finished difference. Result has 157 places, 192 transitions, 1775 flow [2024-06-21 16:09:08,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1614, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1775, PETRI_PLACES=157, PETRI_TRANSITIONS=192} [2024-06-21 16:09:08,668 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 113 predicate places. [2024-06-21 16:09:08,668 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 192 transitions, 1775 flow [2024-06-21 16:09:08,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:08,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:08,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:08,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 16:09:08,669 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 16:09:08,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:08,670 INFO L85 PathProgramCache]: Analyzing trace with hash 188620587, now seen corresponding path program 2 times [2024-06-21 16:09:08,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:08,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136958520] [2024-06-21 16:09:08,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:08,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:08,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:10,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:09:10,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:10,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136958520] [2024-06-21 16:09:10,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136958520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:10,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:10,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:09:10,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289950659] [2024-06-21 16:09:10,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:10,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:09:10,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:10,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:09:10,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:09:10,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:09:10,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 192 transitions, 1775 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:10,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:10,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:09:10,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:11,224 INFO L124 PetriNetUnfolderBase]: 3062/4656 cut-off events. [2024-06-21 16:09:11,225 INFO L125 PetriNetUnfolderBase]: For 341844/341844 co-relation queries the response was YES. [2024-06-21 16:09:11,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35537 conditions, 4656 events. 3062/4656 cut-off events. For 341844/341844 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 24424 event pairs, 799 based on Foata normal form. 4/4647 useless extension candidates. Maximal degree in co-relation 35466. Up to 4327 conditions per place. [2024-06-21 16:09:11,262 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 204 selfloop transitions, 25 changer transitions 0/240 dead transitions. [2024-06-21 16:09:11,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 240 transitions, 2355 flow [2024-06-21 16:09:11,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:09:11,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:09:11,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 211 transitions. [2024-06-21 16:09:11,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44608879492600423 [2024-06-21 16:09:11,264 INFO L175 Difference]: Start difference. First operand has 157 places, 192 transitions, 1775 flow. Second operand 11 states and 211 transitions. [2024-06-21 16:09:11,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 240 transitions, 2355 flow [2024-06-21 16:09:11,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 240 transitions, 2242 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-21 16:09:11,497 INFO L231 Difference]: Finished difference. Result has 162 places, 192 transitions, 1719 flow [2024-06-21 16:09:11,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1662, PETRI_DIFFERENCE_MINUEND_PLACES=151, 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=11, PETRI_FLOW=1719, PETRI_PLACES=162, PETRI_TRANSITIONS=192} [2024-06-21 16:09:11,498 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 118 predicate places. [2024-06-21 16:09:11,498 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 192 transitions, 1719 flow [2024-06-21 16:09:11,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:11,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:11,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:11,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 16:09:11,499 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 16:09:11,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:11,499 INFO L85 PathProgramCache]: Analyzing trace with hash 306708267, now seen corresponding path program 3 times [2024-06-21 16:09:11,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:11,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649854194] [2024-06-21 16:09:11,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:11,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:11,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:12,938 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 16:09:12,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:12,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649854194] [2024-06-21 16:09:12,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649854194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:12,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:12,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:09:12,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652642420] [2024-06-21 16:09:12,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:12,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:09:12,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:12,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:09:12,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:09:13,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:09:13,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 192 transitions, 1719 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:13,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:13,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:09:13,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:13,981 INFO L124 PetriNetUnfolderBase]: 3079/4684 cut-off events. [2024-06-21 16:09:13,981 INFO L125 PetriNetUnfolderBase]: For 357717/357720 co-relation queries the response was YES. [2024-06-21 16:09:14,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35923 conditions, 4684 events. 3079/4684 cut-off events. For 357717/357720 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 24696 event pairs, 788 based on Foata normal form. 6/4676 useless extension candidates. Maximal degree in co-relation 35850. Up to 4293 conditions per place. [2024-06-21 16:09:14,021 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 184 selfloop transitions, 44 changer transitions 0/239 dead transitions. [2024-06-21 16:09:14,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 239 transitions, 2386 flow [2024-06-21 16:09:14,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:09:14,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:09:14,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-21 16:09:14,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44883720930232557 [2024-06-21 16:09:14,022 INFO L175 Difference]: Start difference. First operand has 162 places, 192 transitions, 1719 flow. Second operand 10 states and 193 transitions. [2024-06-21 16:09:14,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 239 transitions, 2386 flow [2024-06-21 16:09:14,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 239 transitions, 2325 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 16:09:14,223 INFO L231 Difference]: Finished difference. Result has 163 places, 201 transitions, 1898 flow [2024-06-21 16:09:14,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1658, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1898, PETRI_PLACES=163, PETRI_TRANSITIONS=201} [2024-06-21 16:09:14,224 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 119 predicate places. [2024-06-21 16:09:14,224 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 201 transitions, 1898 flow [2024-06-21 16:09:14,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:14,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:14,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:14,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 16:09:14,224 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:09:14,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:14,225 INFO L85 PathProgramCache]: Analyzing trace with hash -140992645, now seen corresponding path program 1 times [2024-06-21 16:09:14,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:14,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044292000] [2024-06-21 16:09:14,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:14,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:14,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:15,056 INFO 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 16:09:15,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:15,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044292000] [2024-06-21 16:09:15,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044292000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:15,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:15,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:09:15,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159864824] [2024-06-21 16:09:15,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:15,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:09:15,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:15,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:09:15,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:09:15,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:09:15,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 201 transitions, 1898 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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 16:09:15,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:15,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:09:15,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:15,916 INFO L124 PetriNetUnfolderBase]: 3180/4820 cut-off events. [2024-06-21 16:09:15,916 INFO L125 PetriNetUnfolderBase]: For 381282/381309 co-relation queries the response was YES. [2024-06-21 16:09:15,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37383 conditions, 4820 events. 3180/4820 cut-off events. For 381282/381309 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 24799 event pairs, 975 based on Foata normal form. 17/4790 useless extension candidates. Maximal degree in co-relation 37308. Up to 4510 conditions per place. [2024-06-21 16:09:15,959 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 170 selfloop transitions, 26 changer transitions 0/230 dead transitions. [2024-06-21 16:09:15,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 230 transitions, 2512 flow [2024-06-21 16:09:15,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:09:15,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:09:15,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-21 16:09:15,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45514950166112955 [2024-06-21 16:09:15,961 INFO L175 Difference]: Start difference. First operand has 163 places, 201 transitions, 1898 flow. Second operand 7 states and 137 transitions. [2024-06-21 16:09:15,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 230 transitions, 2512 flow [2024-06-21 16:09:16,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 230 transitions, 2402 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-21 16:09:16,267 INFO L231 Difference]: Finished difference. Result has 165 places, 207 transitions, 1925 flow [2024-06-21 16:09:16,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1792, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1925, PETRI_PLACES=165, PETRI_TRANSITIONS=207} [2024-06-21 16:09:16,268 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 121 predicate places. [2024-06-21 16:09:16,268 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 207 transitions, 1925 flow [2024-06-21 16:09:16,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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 16:09:16,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:16,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:16,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 16:09:16,268 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 16:09:16,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:16,269 INFO L85 PathProgramCache]: Analyzing trace with hash 472352175, now seen corresponding path program 1 times [2024-06-21 16:09:16,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:16,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354697859] [2024-06-21 16:09:16,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:16,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:16,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:17,506 INFO 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 16:09:17,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:17,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354697859] [2024-06-21 16:09:17,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354697859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:17,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:17,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:09:17,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420874606] [2024-06-21 16:09:17,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:17,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:09:17,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:17,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:09:17,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:09:17,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:09:17,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 207 transitions, 1925 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:17,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:17,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:09:17,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:18,487 INFO L124 PetriNetUnfolderBase]: 3129/4746 cut-off events. [2024-06-21 16:09:18,487 INFO L125 PetriNetUnfolderBase]: For 393273/393288 co-relation queries the response was YES. [2024-06-21 16:09:18,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37695 conditions, 4746 events. 3129/4746 cut-off events. For 393273/393288 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 24989 event pairs, 725 based on Foata normal form. 4/4730 useless extension candidates. Maximal degree in co-relation 37618. Up to 4252 conditions per place. [2024-06-21 16:09:18,533 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 185 selfloop transitions, 52 changer transitions 0/250 dead transitions. [2024-06-21 16:09:18,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 250 transitions, 2561 flow [2024-06-21 16:09:18,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:09:18,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:09:18,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-21 16:09:18,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4604651162790698 [2024-06-21 16:09:18,534 INFO L175 Difference]: Start difference. First operand has 165 places, 207 transitions, 1925 flow. Second operand 10 states and 198 transitions. [2024-06-21 16:09:18,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 250 transitions, 2561 flow [2024-06-21 16:09:18,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 250 transitions, 2503 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-21 16:09:18,884 INFO L231 Difference]: Finished difference. Result has 172 places, 210 transitions, 2037 flow [2024-06-21 16:09:18,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1867, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2037, PETRI_PLACES=172, PETRI_TRANSITIONS=210} [2024-06-21 16:09:18,885 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 128 predicate places. [2024-06-21 16:09:18,885 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 210 transitions, 2037 flow [2024-06-21 16:09:18,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:18,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:18,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:18,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 16:09:18,886 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 16:09:18,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:18,886 INFO L85 PathProgramCache]: Analyzing trace with hash 479027529, now seen corresponding path program 1 times [2024-06-21 16:09:18,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:18,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140998021] [2024-06-21 16:09:18,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:18,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:18,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:19,887 INFO 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 16:09:19,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:19,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140998021] [2024-06-21 16:09:19,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140998021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:19,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:19,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:09:19,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154000738] [2024-06-21 16:09:19,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:19,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:09:19,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:19,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:09:19,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:09:19,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:09:19,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 210 transitions, 2037 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:19,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:19,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:09:19,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:20,851 INFO L124 PetriNetUnfolderBase]: 3500/5215 cut-off events. [2024-06-21 16:09:20,852 INFO L125 PetriNetUnfolderBase]: For 423365/423380 co-relation queries the response was YES. [2024-06-21 16:09:20,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40971 conditions, 5215 events. 3500/5215 cut-off events. For 423365/423380 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 26155 event pairs, 850 based on Foata normal form. 4/5199 useless extension candidates. Maximal degree in co-relation 40892. Up to 4885 conditions per place. [2024-06-21 16:09:20,900 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 202 selfloop transitions, 36 changer transitions 0/249 dead transitions. [2024-06-21 16:09:20,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 249 transitions, 2676 flow [2024-06-21 16:09:20,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:09:20,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:09:20,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 16:09:20,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-21 16:09:20,902 INFO L175 Difference]: Start difference. First operand has 172 places, 210 transitions, 2037 flow. Second operand 9 states and 168 transitions. [2024-06-21 16:09:20,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 249 transitions, 2676 flow [2024-06-21 16:09:21,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 249 transitions, 2532 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-21 16:09:21,262 INFO L231 Difference]: Finished difference. Result has 174 places, 215 transitions, 2055 flow [2024-06-21 16:09:21,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1897, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2055, PETRI_PLACES=174, PETRI_TRANSITIONS=215} [2024-06-21 16:09:21,263 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 130 predicate places. [2024-06-21 16:09:21,263 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 215 transitions, 2055 flow [2024-06-21 16:09:21,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:21,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:21,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:21,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 16:09:21,264 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:09:21,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:21,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1527315599, now seen corresponding path program 2 times [2024-06-21 16:09:21,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:21,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977968751] [2024-06-21 16:09:21,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:21,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:21,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:22,291 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 16:09:22,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:22,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977968751] [2024-06-21 16:09:22,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977968751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:22,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:22,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:09:22,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346025255] [2024-06-21 16:09:22,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:22,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:09:22,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:22,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:09:22,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:09:22,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:09:22,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 215 transitions, 2055 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:22,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:22,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:09:22,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:23,295 INFO L124 PetriNetUnfolderBase]: 3129/4755 cut-off events. [2024-06-21 16:09:23,295 INFO L125 PetriNetUnfolderBase]: For 424435/424452 co-relation queries the response was YES. [2024-06-21 16:09:23,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38622 conditions, 4755 events. 3129/4755 cut-off events. For 424435/424452 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 25137 event pairs, 755 based on Foata normal form. 4/4736 useless extension candidates. Maximal degree in co-relation 38541. Up to 4178 conditions per place. [2024-06-21 16:09:23,338 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 173 selfloop transitions, 63 changer transitions 0/250 dead transitions. [2024-06-21 16:09:23,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 250 transitions, 2623 flow [2024-06-21 16:09:23,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:09:23,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:09:23,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-21 16:09:23,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4702842377260982 [2024-06-21 16:09:23,340 INFO L175 Difference]: Start difference. First operand has 174 places, 215 transitions, 2055 flow. Second operand 9 states and 182 transitions. [2024-06-21 16:09:23,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 250 transitions, 2623 flow [2024-06-21 16:09:23,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 250 transitions, 2476 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-21 16:09:23,709 INFO L231 Difference]: Finished difference. Result has 177 places, 215 transitions, 2048 flow [2024-06-21 16:09:23,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1908, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2048, PETRI_PLACES=177, PETRI_TRANSITIONS=215} [2024-06-21 16:09:23,710 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 133 predicate places. [2024-06-21 16:09:23,710 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 215 transitions, 2048 flow [2024-06-21 16:09:23,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:23,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:23,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:23,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 16:09:23,710 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:09:23,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:23,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1451494269, now seen corresponding path program 4 times [2024-06-21 16:09:23,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:23,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245285180] [2024-06-21 16:09:23,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:23,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:23,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:24,976 INFO 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 16:09:24,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:24,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245285180] [2024-06-21 16:09:24,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245285180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:24,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:24,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:09:24,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243952498] [2024-06-21 16:09:24,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:24,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:09:24,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:24,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:09:24,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:09:25,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:09:25,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 215 transitions, 2048 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:25,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:25,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:09:25,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:26,198 INFO L124 PetriNetUnfolderBase]: 3170/4819 cut-off events. [2024-06-21 16:09:26,198 INFO L125 PetriNetUnfolderBase]: For 441977/441992 co-relation queries the response was YES. [2024-06-21 16:09:26,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39332 conditions, 4819 events. 3170/4819 cut-off events. For 441977/441992 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 25485 event pairs, 794 based on Foata normal form. 6/4803 useless extension candidates. Maximal degree in co-relation 39250. Up to 4499 conditions per place. [2024-06-21 16:09:26,238 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 211 selfloop transitions, 27 changer transitions 0/252 dead transitions. [2024-06-21 16:09:26,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 252 transitions, 2670 flow [2024-06-21 16:09:26,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:09:26,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:09:26,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-21 16:09:26,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43488372093023253 [2024-06-21 16:09:26,239 INFO L175 Difference]: Start difference. First operand has 177 places, 215 transitions, 2048 flow. Second operand 10 states and 187 transitions. [2024-06-21 16:09:26,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 252 transitions, 2670 flow [2024-06-21 16:09:26,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 252 transitions, 2524 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-21 16:09:26,580 INFO L231 Difference]: Finished difference. Result has 178 places, 217 transitions, 2025 flow [2024-06-21 16:09:26,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1902, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2025, PETRI_PLACES=178, PETRI_TRANSITIONS=217} [2024-06-21 16:09:26,581 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 134 predicate places. [2024-06-21 16:09:26,581 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 217 transitions, 2025 flow [2024-06-21 16:09:26,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:26,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:26,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:26,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 16:09:26,581 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:09:26,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:26,582 INFO L85 PathProgramCache]: Analyzing trace with hash 2015889789, now seen corresponding path program 2 times [2024-06-21 16:09:26,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:26,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956756080] [2024-06-21 16:09:26,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:26,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:26,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:27,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:09:27,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:27,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956756080] [2024-06-21 16:09:27,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956756080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:27,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:27,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:09:27,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125725615] [2024-06-21 16:09:27,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:27,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:09:27,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:27,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:09:27,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:09:27,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:09:27,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 217 transitions, 2025 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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 16:09:27,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:27,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:09:27,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:28,289 INFO L124 PetriNetUnfolderBase]: 3233/4913 cut-off events. [2024-06-21 16:09:28,289 INFO L125 PetriNetUnfolderBase]: For 424934/424957 co-relation queries the response was YES. [2024-06-21 16:09:28,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39235 conditions, 4913 events. 3233/4913 cut-off events. For 424934/424957 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 25452 event pairs, 941 based on Foata normal form. 8/4874 useless extension candidates. Maximal degree in co-relation 39153. Up to 4612 conditions per place. [2024-06-21 16:09:28,334 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 183 selfloop transitions, 21 changer transitions 0/239 dead transitions. [2024-06-21 16:09:28,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 239 transitions, 2543 flow [2024-06-21 16:09:28,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:09:28,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:09:28,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-21 16:09:28,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318936877076412 [2024-06-21 16:09:28,336 INFO L175 Difference]: Start difference. First operand has 178 places, 217 transitions, 2025 flow. Second operand 7 states and 130 transitions. [2024-06-21 16:09:28,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 239 transitions, 2543 flow [2024-06-21 16:09:28,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 239 transitions, 2436 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-21 16:09:28,684 INFO L231 Difference]: Finished difference. Result has 178 places, 222 transitions, 2038 flow [2024-06-21 16:09:28,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1918, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2038, PETRI_PLACES=178, PETRI_TRANSITIONS=222} [2024-06-21 16:09:28,685 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 134 predicate places. [2024-06-21 16:09:28,685 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 222 transitions, 2038 flow [2024-06-21 16:09:28,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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 16:09:28,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:28,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:28,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 16:09:28,686 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:09:28,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:28,686 INFO L85 PathProgramCache]: Analyzing trace with hash 2015890223, now seen corresponding path program 1 times [2024-06-21 16:09:28,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:28,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962904110] [2024-06-21 16:09:28,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:28,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:28,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:29,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:09:29,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:29,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962904110] [2024-06-21 16:09:29,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962904110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:29,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:29,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:09:29,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161555733] [2024-06-21 16:09:29,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:29,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:09:29,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:29,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:09:29,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:09:29,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:09:29,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 222 transitions, 2038 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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 16:09:29,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:29,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:09:29,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:30,331 INFO L124 PetriNetUnfolderBase]: 3264/4951 cut-off events. [2024-06-21 16:09:30,332 INFO L125 PetriNetUnfolderBase]: For 444706/444733 co-relation queries the response was YES. [2024-06-21 16:09:30,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40131 conditions, 4951 events. 3264/4951 cut-off events. For 444706/444733 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 25559 event pairs, 944 based on Foata normal form. 18/4922 useless extension candidates. Maximal degree in co-relation 40048. Up to 4633 conditions per place. [2024-06-21 16:09:30,377 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 194 selfloop transitions, 23 changer transitions 0/252 dead transitions. [2024-06-21 16:09:30,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 252 transitions, 2708 flow [2024-06-21 16:09:30,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:09:30,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:09:30,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-21 16:09:30,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-21 16:09:30,379 INFO L175 Difference]: Start difference. First operand has 178 places, 222 transitions, 2038 flow. Second operand 7 states and 136 transitions. [2024-06-21 16:09:30,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 252 transitions, 2708 flow [2024-06-21 16:09:30,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 252 transitions, 2630 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 16:09:30,706 INFO L231 Difference]: Finished difference. Result has 181 places, 231 transitions, 2118 flow [2024-06-21 16:09:30,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1960, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2118, PETRI_PLACES=181, PETRI_TRANSITIONS=231} [2024-06-21 16:09:30,706 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 137 predicate places. [2024-06-21 16:09:30,706 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 231 transitions, 2118 flow [2024-06-21 16:09:30,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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 16:09:30,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:30,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:30,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 16:09:30,707 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 16:09:30,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:30,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1869798855, now seen corresponding path program 2 times [2024-06-21 16:09:30,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:30,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849205080] [2024-06-21 16:09:30,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:30,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:30,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:31,576 INFO 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 16:09:31,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:31,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849205080] [2024-06-21 16:09:31,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849205080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:31,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:31,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:09:31,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974313503] [2024-06-21 16:09:31,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:31,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:09:31,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:31,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:09:31,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:09:31,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:09:31,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 231 transitions, 2118 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:31,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:31,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:09:31,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:32,684 INFO L124 PetriNetUnfolderBase]: 3575/5321 cut-off events. [2024-06-21 16:09:32,684 INFO L125 PetriNetUnfolderBase]: For 470228/470252 co-relation queries the response was YES. [2024-06-21 16:09:32,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43390 conditions, 5321 events. 3575/5321 cut-off events. For 470228/470252 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 26648 event pairs, 923 based on Foata normal form. 4/5307 useless extension candidates. Maximal degree in co-relation 43305. Up to 5073 conditions per place. [2024-06-21 16:09:32,737 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 229 selfloop transitions, 24 changer transitions 0/266 dead transitions. [2024-06-21 16:09:32,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 266 transitions, 2787 flow [2024-06-21 16:09:32,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:09:32,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:09:32,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 16:09:32,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160206718346253 [2024-06-21 16:09:32,738 INFO L175 Difference]: Start difference. First operand has 181 places, 231 transitions, 2118 flow. Second operand 9 states and 161 transitions. [2024-06-21 16:09:32,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 266 transitions, 2787 flow [2024-06-21 16:09:33,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 266 transitions, 2749 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-21 16:09:33,240 INFO L231 Difference]: Finished difference. Result has 189 places, 236 transitions, 2234 flow [2024-06-21 16:09:33,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2080, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2234, PETRI_PLACES=189, PETRI_TRANSITIONS=236} [2024-06-21 16:09:33,241 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 145 predicate places. [2024-06-21 16:09:33,241 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 236 transitions, 2234 flow [2024-06-21 16:09:33,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:33,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:33,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:33,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 16:09:33,241 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 16:09:33,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:33,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1904281453, now seen corresponding path program 3 times [2024-06-21 16:09:33,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:33,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361199824] [2024-06-21 16:09:33,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:33,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:33,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:34,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:09:34,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:34,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361199824] [2024-06-21 16:09:34,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361199824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:34,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:34,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:09:34,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390121833] [2024-06-21 16:09:34,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:34,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:09:34,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:34,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:09:34,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:09:34,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:09:34,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 236 transitions, 2234 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 16:09:34,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:34,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:09:34,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:35,145 INFO L124 PetriNetUnfolderBase]: 3592/5348 cut-off events. [2024-06-21 16:09:35,146 INFO L125 PetriNetUnfolderBase]: For 490750/490774 co-relation queries the response was YES. [2024-06-21 16:09:35,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44490 conditions, 5348 events. 3592/5348 cut-off events. For 490750/490774 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 26843 event pairs, 913 based on Foata normal form. 4/5334 useless extension candidates. Maximal degree in co-relation 44401. Up to 5127 conditions per place. [2024-06-21 16:09:35,199 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 235 selfloop transitions, 19 changer transitions 0/267 dead transitions. [2024-06-21 16:09:35,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 267 transitions, 2878 flow [2024-06-21 16:09:35,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:09:35,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:09:35,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-21 16:09:35,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082687338501292 [2024-06-21 16:09:35,201 INFO L175 Difference]: Start difference. First operand has 189 places, 236 transitions, 2234 flow. Second operand 9 states and 158 transitions. [2024-06-21 16:09:35,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 267 transitions, 2878 flow [2024-06-21 16:09:35,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 267 transitions, 2771 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-21 16:09:35,574 INFO L231 Difference]: Finished difference. Result has 192 places, 238 transitions, 2238 flow [2024-06-21 16:09:35,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2127, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2238, PETRI_PLACES=192, PETRI_TRANSITIONS=238} [2024-06-21 16:09:35,574 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 148 predicate places. [2024-06-21 16:09:35,575 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 238 transitions, 2238 flow [2024-06-21 16:09:35,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 16:09:35,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:35,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:35,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 16:09:35,575 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 16:09:35,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:35,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1557642669, now seen corresponding path program 5 times [2024-06-21 16:09:35,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:35,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433036998] [2024-06-21 16:09:35,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:35,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:35,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:36,608 INFO 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 16:09:36,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:36,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433036998] [2024-06-21 16:09:36,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433036998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:36,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:36,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:09:36,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821393151] [2024-06-21 16:09:36,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:36,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:09:36,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:36,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:09:36,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:09:36,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:09:36,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 238 transitions, 2238 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:36,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:36,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:09:36,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:37,698 INFO L124 PetriNetUnfolderBase]: 3260/4946 cut-off events. [2024-06-21 16:09:37,698 INFO L125 PetriNetUnfolderBase]: For 494806/494830 co-relation queries the response was YES. [2024-06-21 16:09:37,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42127 conditions, 4946 events. 3260/4946 cut-off events. For 494806/494830 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 26010 event pairs, 793 based on Foata normal form. 4/4932 useless extension candidates. Maximal degree in co-relation 42037. Up to 4639 conditions per place. [2024-06-21 16:09:37,750 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 233 selfloop transitions, 22 changer transitions 0/272 dead transitions. [2024-06-21 16:09:37,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 272 transitions, 2894 flow [2024-06-21 16:09:37,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:09:37,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:09:37,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-21 16:09:37,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4232558139534884 [2024-06-21 16:09:37,751 INFO L175 Difference]: Start difference. First operand has 192 places, 238 transitions, 2238 flow. Second operand 10 states and 182 transitions. [2024-06-21 16:09:37,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 272 transitions, 2894 flow [2024-06-21 16:09:38,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 272 transitions, 2803 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-21 16:09:38,157 INFO L231 Difference]: Finished difference. Result has 196 places, 240 transitions, 2268 flow [2024-06-21 16:09:38,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2147, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2268, PETRI_PLACES=196, PETRI_TRANSITIONS=240} [2024-06-21 16:09:38,158 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 152 predicate places. [2024-06-21 16:09:38,158 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 240 transitions, 2268 flow [2024-06-21 16:09:38,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:38,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:38,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:38,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 16:09:38,158 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 16:09:38,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:38,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1860323819, now seen corresponding path program 4 times [2024-06-21 16:09:38,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:38,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147307618] [2024-06-21 16:09:38,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:38,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:38,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:39,037 INFO 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 16:09:39,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:39,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147307618] [2024-06-21 16:09:39,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147307618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:39,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:39,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:09:39,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730376534] [2024-06-21 16:09:39,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:39,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:09:39,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:39,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:09:39,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:09:39,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:09:39,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 240 transitions, 2268 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 16:09:39,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:39,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:09:39,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:40,185 INFO L124 PetriNetUnfolderBase]: 3601/5363 cut-off events. [2024-06-21 16:09:40,186 INFO L125 PetriNetUnfolderBase]: For 523707/523731 co-relation queries the response was YES. [2024-06-21 16:09:40,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45191 conditions, 5363 events. 3601/5363 cut-off events. For 523707/523731 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 26947 event pairs, 906 based on Foata normal form. 4/5349 useless extension candidates. Maximal degree in co-relation 45100. Up to 5106 conditions per place. [2024-06-21 16:09:40,240 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 232 selfloop transitions, 26 changer transitions 0/271 dead transitions. [2024-06-21 16:09:40,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 271 transitions, 2926 flow [2024-06-21 16:09:40,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:09:40,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:09:40,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 16:09:40,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-21 16:09:40,242 INFO L175 Difference]: Start difference. First operand has 196 places, 240 transitions, 2268 flow. Second operand 9 states and 159 transitions. [2024-06-21 16:09:40,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 271 transitions, 2926 flow [2024-06-21 16:09:40,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 271 transitions, 2795 flow, removed 35 selfloop flow, removed 9 redundant places. [2024-06-21 16:09:40,633 INFO L231 Difference]: Finished difference. Result has 196 places, 242 transitions, 2271 flow [2024-06-21 16:09:40,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2137, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2271, PETRI_PLACES=196, PETRI_TRANSITIONS=242} [2024-06-21 16:09:40,634 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 152 predicate places. [2024-06-21 16:09:40,634 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 242 transitions, 2271 flow [2024-06-21 16:09:40,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 16:09:40,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:40,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:40,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 16:09:40,634 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 16:09:40,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:40,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1860323509, now seen corresponding path program 1 times [2024-06-21 16:09:40,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:40,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131963830] [2024-06-21 16:09:40,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:40,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:40,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:41,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:09:41,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:41,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131963830] [2024-06-21 16:09:41,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131963830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:41,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:41,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:09:41,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733381908] [2024-06-21 16:09:41,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:41,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:09:41,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:41,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:09:41,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:09:41,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:09:41,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 242 transitions, 2271 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 16:09:41,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:41,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:09:41,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:42,730 INFO L124 PetriNetUnfolderBase]: 3608/5382 cut-off events. [2024-06-21 16:09:42,731 INFO L125 PetriNetUnfolderBase]: For 532852/532852 co-relation queries the response was YES. [2024-06-21 16:09:42,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45437 conditions, 5382 events. 3608/5382 cut-off events. For 532852/532852 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 27046 event pairs, 877 based on Foata normal form. 2/5382 useless extension candidates. Maximal degree in co-relation 45346. Up to 5121 conditions per place. [2024-06-21 16:09:42,792 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 236 selfloop transitions, 28 changer transitions 0/277 dead transitions. [2024-06-21 16:09:42,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 277 transitions, 2967 flow [2024-06-21 16:09:42,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:09:42,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:09:42,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 16:09:42,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134366925064599 [2024-06-21 16:09:42,794 INFO L175 Difference]: Start difference. First operand has 196 places, 242 transitions, 2271 flow. Second operand 9 states and 160 transitions. [2024-06-21 16:09:42,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 277 transitions, 2967 flow [2024-06-21 16:09:43,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 277 transitions, 2851 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-21 16:09:43,268 INFO L231 Difference]: Finished difference. Result has 198 places, 248 transitions, 2327 flow [2024-06-21 16:09:43,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2157, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2327, PETRI_PLACES=198, PETRI_TRANSITIONS=248} [2024-06-21 16:09:43,269 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 154 predicate places. [2024-06-21 16:09:43,269 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 248 transitions, 2327 flow [2024-06-21 16:09:43,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 16:09:43,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:43,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:43,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 16:09:43,269 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:09:43,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:43,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1893805933, now seen corresponding path program 5 times [2024-06-21 16:09:43,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:43,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930756014] [2024-06-21 16:09:43,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:43,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:43,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:44,206 INFO 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 16:09:44,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:44,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930756014] [2024-06-21 16:09:44,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930756014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:44,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:44,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:09:44,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37989038] [2024-06-21 16:09:44,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:44,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:09:44,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:44,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:09:44,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:09:44,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:09:44,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 248 transitions, 2327 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 16:09:44,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:44,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:09:44,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:45,406 INFO L124 PetriNetUnfolderBase]: 3625/5409 cut-off events. [2024-06-21 16:09:45,407 INFO L125 PetriNetUnfolderBase]: For 535015/535015 co-relation queries the response was YES. [2024-06-21 16:09:45,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45714 conditions, 5409 events. 3625/5409 cut-off events. For 535015/535015 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 27290 event pairs, 866 based on Foata normal form. 4/5411 useless extension candidates. Maximal degree in co-relation 45622. Up to 5166 conditions per place. [2024-06-21 16:09:45,461 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 246 selfloop transitions, 20 changer transitions 0/279 dead transitions. [2024-06-21 16:09:45,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 279 transitions, 3001 flow [2024-06-21 16:09:45,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:09:45,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:09:45,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-21 16:09:45,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082687338501292 [2024-06-21 16:09:45,463 INFO L175 Difference]: Start difference. First operand has 198 places, 248 transitions, 2327 flow. Second operand 9 states and 158 transitions. [2024-06-21 16:09:45,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 279 transitions, 3001 flow [2024-06-21 16:09:45,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 279 transitions, 2901 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-21 16:09:45,911 INFO L231 Difference]: Finished difference. Result has 200 places, 250 transitions, 2348 flow [2024-06-21 16:09:45,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2227, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2348, PETRI_PLACES=200, PETRI_TRANSITIONS=250} [2024-06-21 16:09:45,912 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 156 predicate places. [2024-06-21 16:09:45,912 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 250 transitions, 2348 flow [2024-06-21 16:09:45,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 16:09:45,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:45,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:45,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 16:09:45,913 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:09:45,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:45,913 INFO L85 PathProgramCache]: Analyzing trace with hash -2091443895, now seen corresponding path program 6 times [2024-06-21 16:09:45,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:45,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332546649] [2024-06-21 16:09:45,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:45,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:45,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:46,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:09:46,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:46,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332546649] [2024-06-21 16:09:46,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332546649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:46,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:46,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:09:46,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414358274] [2024-06-21 16:09:46,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:46,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:09:46,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:46,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:09:46,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:09:46,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:09:46,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 250 transitions, 2348 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:46,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:46,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:09:46,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:47,886 INFO L124 PetriNetUnfolderBase]: 3617/5397 cut-off events. [2024-06-21 16:09:47,886 INFO L125 PetriNetUnfolderBase]: For 549012/549012 co-relation queries the response was YES. [2024-06-21 16:09:47,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45853 conditions, 5397 events. 3617/5397 cut-off events. For 549012/549012 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 27127 event pairs, 858 based on Foata normal form. 4/5399 useless extension candidates. Maximal degree in co-relation 45760. Up to 5105 conditions per place. [2024-06-21 16:09:47,941 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 241 selfloop transitions, 31 changer transitions 0/285 dead transitions. [2024-06-21 16:09:47,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 285 transitions, 3069 flow [2024-06-21 16:09:47,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:09:47,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:09:47,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 16:09:47,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-21 16:09:47,942 INFO L175 Difference]: Start difference. First operand has 200 places, 250 transitions, 2348 flow. Second operand 9 states and 163 transitions. [2024-06-21 16:09:47,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 285 transitions, 3069 flow [2024-06-21 16:09:48,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 285 transitions, 2966 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-21 16:09:48,398 INFO L231 Difference]: Finished difference. Result has 203 places, 255 transitions, 2423 flow [2024-06-21 16:09:48,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2245, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2423, PETRI_PLACES=203, PETRI_TRANSITIONS=255} [2024-06-21 16:09:48,399 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 159 predicate places. [2024-06-21 16:09:48,399 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 255 transitions, 2423 flow [2024-06-21 16:09:48,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:48,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:48,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:48,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 16:09:48,399 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:09:48,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:48,400 INFO L85 PathProgramCache]: Analyzing trace with hash -2091690159, now seen corresponding path program 3 times [2024-06-21 16:09:48,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:48,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595837984] [2024-06-21 16:09:48,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:48,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:48,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:49,703 INFO 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 16:09:49,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:49,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595837984] [2024-06-21 16:09:49,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595837984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:49,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:49,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:09:49,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663527909] [2024-06-21 16:09:49,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:49,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:09:49,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:49,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:09:49,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:09:49,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:09:49,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 255 transitions, 2423 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:49,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:49,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:09:49,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:50,834 INFO L124 PetriNetUnfolderBase]: 3289/5009 cut-off events. [2024-06-21 16:09:50,834 INFO L125 PetriNetUnfolderBase]: For 551856/551856 co-relation queries the response was YES. [2024-06-21 16:09:50,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43621 conditions, 5009 events. 3289/5009 cut-off events. For 551856/551856 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 26400 event pairs, 745 based on Foata normal form. 4/5006 useless extension candidates. Maximal degree in co-relation 43526. Up to 4592 conditions per place. [2024-06-21 16:09:50,889 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 236 selfloop transitions, 37 changer transitions 0/291 dead transitions. [2024-06-21 16:09:50,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 291 transitions, 3067 flow [2024-06-21 16:09:50,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:09:50,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:09:50,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-21 16:09:50,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43953488372093025 [2024-06-21 16:09:50,890 INFO L175 Difference]: Start difference. First operand has 203 places, 255 transitions, 2423 flow. Second operand 10 states and 189 transitions. [2024-06-21 16:09:50,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 291 transitions, 3067 flow [2024-06-21 16:09:51,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 291 transitions, 2904 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-21 16:09:51,340 INFO L231 Difference]: Finished difference. Result has 207 places, 255 transitions, 2342 flow [2024-06-21 16:09:51,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2260, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2342, PETRI_PLACES=207, PETRI_TRANSITIONS=255} [2024-06-21 16:09:51,340 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 163 predicate places. [2024-06-21 16:09:51,340 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 255 transitions, 2342 flow [2024-06-21 16:09:51,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:51,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:51,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:51,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 16:09:51,341 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:09:51,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:51,341 INFO L85 PathProgramCache]: Analyzing trace with hash 273147949, now seen corresponding path program 2 times [2024-06-21 16:09:51,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:51,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077864280] [2024-06-21 16:09:51,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:51,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:51,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:51,913 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 16:09:51,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:51,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077864280] [2024-06-21 16:09:51,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077864280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:51,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:51,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:09:51,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441608024] [2024-06-21 16:09:51,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:51,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:09:51,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:51,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:09:51,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:09:52,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:09:52,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 255 transitions, 2342 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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 16:09:52,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:52,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:09:52,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:52,931 INFO L124 PetriNetUnfolderBase]: 3366/5111 cut-off events. [2024-06-21 16:09:52,931 INFO L125 PetriNetUnfolderBase]: For 576825/576849 co-relation queries the response was YES. [2024-06-21 16:09:52,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44490 conditions, 5111 events. 3366/5111 cut-off events. For 576825/576849 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 26539 event pairs, 891 based on Foata normal form. 13/5094 useless extension candidates. Maximal degree in co-relation 44394. Up to 4795 conditions per place. [2024-06-21 16:09:52,983 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 218 selfloop transitions, 14 changer transitions 0/270 dead transitions. [2024-06-21 16:09:52,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 270 transitions, 2880 flow [2024-06-21 16:09:52,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:09:52,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:09:52,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-21 16:09:52,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40863787375415284 [2024-06-21 16:09:52,984 INFO L175 Difference]: Start difference. First operand has 207 places, 255 transitions, 2342 flow. Second operand 7 states and 123 transitions. [2024-06-21 16:09:52,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 270 transitions, 2880 flow [2024-06-21 16:09:53,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 270 transitions, 2742 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-21 16:09:53,428 INFO L231 Difference]: Finished difference. Result has 204 places, 258 transitions, 2288 flow [2024-06-21 16:09:53,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2204, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2288, PETRI_PLACES=204, PETRI_TRANSITIONS=258} [2024-06-21 16:09:53,428 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 160 predicate places. [2024-06-21 16:09:53,429 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 258 transitions, 2288 flow [2024-06-21 16:09:53,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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 16:09:53,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:53,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:53,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 16:09:53,429 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 16:09:53,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:53,429 INFO L85 PathProgramCache]: Analyzing trace with hash 272672719, now seen corresponding path program 3 times [2024-06-21 16:09:53,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:53,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910602303] [2024-06-21 16:09:53,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:53,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:53,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:54,006 INFO 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 16:09:54,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:54,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910602303] [2024-06-21 16:09:54,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910602303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:54,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:54,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:09:54,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377788155] [2024-06-21 16:09:54,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:54,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:09:54,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:54,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:09:54,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:09:54,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:09:54,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 258 transitions, 2288 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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 16:09:54,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:54,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:09:54,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:54,984 INFO L124 PetriNetUnfolderBase]: 3357/5089 cut-off events. [2024-06-21 16:09:54,984 INFO L125 PetriNetUnfolderBase]: For 589977/590008 co-relation queries the response was YES. [2024-06-21 16:09:55,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44226 conditions, 5089 events. 3357/5089 cut-off events. For 589977/590008 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 26340 event pairs, 889 based on Foata normal form. 20/5072 useless extension candidates. Maximal degree in co-relation 44129. Up to 4771 conditions per place. [2024-06-21 16:09:55,033 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 215 selfloop transitions, 19 changer transitions 0/272 dead transitions. [2024-06-21 16:09:55,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 272 transitions, 2792 flow [2024-06-21 16:09:55,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:09:55,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:09:55,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 16:09:55,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219269102990033 [2024-06-21 16:09:55,035 INFO L175 Difference]: Start difference. First operand has 204 places, 258 transitions, 2288 flow. Second operand 7 states and 127 transitions. [2024-06-21 16:09:55,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 272 transitions, 2792 flow [2024-06-21 16:09:55,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 272 transitions, 2714 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-21 16:09:55,507 INFO L231 Difference]: Finished difference. Result has 206 places, 258 transitions, 2254 flow [2024-06-21 16:09:55,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2210, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2254, PETRI_PLACES=206, PETRI_TRANSITIONS=258} [2024-06-21 16:09:55,508 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 162 predicate places. [2024-06-21 16:09:55,508 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 258 transitions, 2254 flow [2024-06-21 16:09:55,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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 16:09:55,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:55,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:55,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 16:09:55,509 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 16:09:55,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:55,509 INFO L85 PathProgramCache]: Analyzing trace with hash 272672285, now seen corresponding path program 3 times [2024-06-21 16:09:55,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:55,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982583588] [2024-06-21 16:09:55,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:55,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:55,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:56,175 INFO 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 16:09:56,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:56,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982583588] [2024-06-21 16:09:56,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982583588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:56,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:56,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:09:56,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140850560] [2024-06-21 16:09:56,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:56,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:09:56,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:56,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:09:56,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:09:56,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:09:56,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 258 transitions, 2254 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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 16:09:56,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:56,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:09:56,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:57,186 INFO L124 PetriNetUnfolderBase]: 3351/5081 cut-off events. [2024-06-21 16:09:57,186 INFO L125 PetriNetUnfolderBase]: For 600715/600746 co-relation queries the response was YES. [2024-06-21 16:09:57,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44261 conditions, 5081 events. 3351/5081 cut-off events. For 600715/600746 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 26289 event pairs, 888 based on Foata normal form. 19/5063 useless extension candidates. Maximal degree in co-relation 44164. Up to 4782 conditions per place. [2024-06-21 16:09:57,231 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 217 selfloop transitions, 14 changer transitions 0/269 dead transitions. [2024-06-21 16:09:57,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 269 transitions, 2750 flow [2024-06-21 16:09:57,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:09:57,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:09:57,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 16:09:57,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019933554817276 [2024-06-21 16:09:57,232 INFO L175 Difference]: Start difference. First operand has 206 places, 258 transitions, 2254 flow. Second operand 7 states and 121 transitions. [2024-06-21 16:09:57,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 269 transitions, 2750 flow [2024-06-21 16:09:57,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 269 transitions, 2662 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-21 16:09:57,733 INFO L231 Difference]: Finished difference. Result has 207 places, 259 transitions, 2212 flow [2024-06-21 16:09:57,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2170, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2212, PETRI_PLACES=207, PETRI_TRANSITIONS=259} [2024-06-21 16:09:57,734 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 163 predicate places. [2024-06-21 16:09:57,734 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 259 transitions, 2212 flow [2024-06-21 16:09:57,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 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 16:09:57,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:57,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:57,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 16:09:57,735 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 16:09:57,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:57,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1069817656, now seen corresponding path program 1 times [2024-06-21 16:09:57,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:57,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113909529] [2024-06-21 16:09:57,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:57,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:57,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:58,428 INFO 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 16:09:58,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:58,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113909529] [2024-06-21 16:09:58,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113909529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:58,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:58,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:09:58,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258793440] [2024-06-21 16:09:58,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:58,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:09:58,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:58,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:09:58,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:09:58,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 16:09:58,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 259 transitions, 2212 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 16:09:58,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:58,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 16:09:58,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:59,613 INFO L124 PetriNetUnfolderBase]: 3762/5539 cut-off events. [2024-06-21 16:09:59,613 INFO L125 PetriNetUnfolderBase]: For 611892/611892 co-relation queries the response was YES. [2024-06-21 16:09:59,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47056 conditions, 5539 events. 3762/5539 cut-off events. For 611892/611892 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 27184 event pairs, 948 based on Foata normal form. 1/5538 useless extension candidates. Maximal degree in co-relation 46958. Up to 5491 conditions per place. [2024-06-21 16:09:59,671 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 255 selfloop transitions, 24 changer transitions 0/282 dead transitions. [2024-06-21 16:09:59,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 282 transitions, 3010 flow [2024-06-21 16:09:59,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:09:59,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:09:59,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-21 16:09:59,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-21 16:09:59,672 INFO L175 Difference]: Start difference. First operand has 207 places, 259 transitions, 2212 flow. Second operand 7 states and 119 transitions. [2024-06-21 16:09:59,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 282 transitions, 3010 flow [2024-06-21 16:10:00,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 282 transitions, 2978 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 16:10:00,266 INFO L231 Difference]: Finished difference. Result has 209 places, 265 transitions, 2316 flow [2024-06-21 16:10:00,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2180, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2316, PETRI_PLACES=209, PETRI_TRANSITIONS=265} [2024-06-21 16:10:00,266 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 165 predicate places. [2024-06-21 16:10:00,266 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 265 transitions, 2316 flow [2024-06-21 16:10:00,267 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 16:10:00,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:00,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:00,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 16:10:00,267 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 16:10:00,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:00,267 INFO L85 PathProgramCache]: Analyzing trace with hash 66234543, now seen corresponding path program 1 times [2024-06-21 16:10:00,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:00,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405706849] [2024-06-21 16:10:00,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:00,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:00,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:00,919 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 16:10:00,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:00,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405706849] [2024-06-21 16:10:00,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405706849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:00,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:00,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:10:00,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81117973] [2024-06-21 16:10:00,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:00,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:10:00,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:00,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:10:00,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:10:00,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 16:10:00,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 265 transitions, 2316 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 16:10:00,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:00,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 16:10:00,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:02,010 INFO L124 PetriNetUnfolderBase]: 3777/5560 cut-off events. [2024-06-21 16:10:02,010 INFO L125 PetriNetUnfolderBase]: For 636746/636746 co-relation queries the response was YES. [2024-06-21 16:10:02,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48050 conditions, 5560 events. 3777/5560 cut-off events. For 636746/636746 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 27244 event pairs, 945 based on Foata normal form. 3/5561 useless extension candidates. Maximal degree in co-relation 47951. Up to 5492 conditions per place. [2024-06-21 16:10:02,074 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 262 selfloop transitions, 25 changer transitions 0/290 dead transitions. [2024-06-21 16:10:02,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 290 transitions, 3154 flow [2024-06-21 16:10:02,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:10:02,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:10:02,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-21 16:10:02,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40863787375415284 [2024-06-21 16:10:02,076 INFO L175 Difference]: Start difference. First operand has 209 places, 265 transitions, 2316 flow. Second operand 7 states and 123 transitions. [2024-06-21 16:10:02,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 290 transitions, 3154 flow [2024-06-21 16:10:02,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 290 transitions, 3088 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-21 16:10:02,617 INFO L231 Difference]: Finished difference. Result has 213 places, 271 transitions, 2404 flow [2024-06-21 16:10:02,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2250, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2404, PETRI_PLACES=213, PETRI_TRANSITIONS=271} [2024-06-21 16:10:02,618 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 169 predicate places. [2024-06-21 16:10:02,618 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 271 transitions, 2404 flow [2024-06-21 16:10:02,618 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 16:10:02,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:02,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:02,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 16:10:02,619 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 16:10:02,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:02,619 INFO L85 PathProgramCache]: Analyzing trace with hash 66234326, now seen corresponding path program 2 times [2024-06-21 16:10:02,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:02,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384570303] [2024-06-21 16:10:02,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:02,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:02,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:03,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:03,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:03,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384570303] [2024-06-21 16:10:03,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384570303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:03,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:03,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:10:03,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551693044] [2024-06-21 16:10:03,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:03,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:10:03,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:03,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:10:03,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:10:03,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 16:10:03,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 271 transitions, 2404 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 16:10:03,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:03,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 16:10:03,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:04,304 INFO L124 PetriNetUnfolderBase]: 3782/5567 cut-off events. [2024-06-21 16:10:04,305 INFO L125 PetriNetUnfolderBase]: For 652382/652382 co-relation queries the response was YES. [2024-06-21 16:10:04,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48517 conditions, 5567 events. 3782/5567 cut-off events. For 652382/652382 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 27343 event pairs, 947 based on Foata normal form. 1/5566 useless extension candidates. Maximal degree in co-relation 48416. Up to 5518 conditions per place. [2024-06-21 16:10:04,368 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 259 selfloop transitions, 26 changer transitions 0/288 dead transitions. [2024-06-21 16:10:04,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 288 transitions, 3164 flow [2024-06-21 16:10:04,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:10:04,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:10:04,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-21 16:10:04,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38870431893687707 [2024-06-21 16:10:04,369 INFO L175 Difference]: Start difference. First operand has 213 places, 271 transitions, 2404 flow. Second operand 7 states and 117 transitions. [2024-06-21 16:10:04,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 288 transitions, 3164 flow [2024-06-21 16:10:05,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 288 transitions, 3104 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-21 16:10:05,070 INFO L231 Difference]: Finished difference. Result has 217 places, 274 transitions, 2432 flow [2024-06-21 16:10:05,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2344, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2432, PETRI_PLACES=217, PETRI_TRANSITIONS=274} [2024-06-21 16:10:05,070 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 173 predicate places. [2024-06-21 16:10:05,071 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 274 transitions, 2432 flow [2024-06-21 16:10:05,071 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 16:10:05,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:05,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:05,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 16:10:05,071 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 16:10:05,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:05,071 INFO L85 PathProgramCache]: Analyzing trace with hash -93231667, now seen corresponding path program 2 times [2024-06-21 16:10:05,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:05,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796722195] [2024-06-21 16:10:05,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:05,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:05,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:05,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:05,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:05,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796722195] [2024-06-21 16:10:05,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796722195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:05,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:05,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:10:05,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316018823] [2024-06-21 16:10:05,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:05,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:10:05,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:05,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:10:05,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:10:05,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 16:10:05,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 274 transitions, 2432 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 16:10:05,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:05,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 16:10:05,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:06,981 INFO L124 PetriNetUnfolderBase]: 3797/5589 cut-off events. [2024-06-21 16:10:06,981 INFO L125 PetriNetUnfolderBase]: For 675285/675288 co-relation queries the response was YES. [2024-06-21 16:10:07,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48934 conditions, 5589 events. 3797/5589 cut-off events. For 675285/675288 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 27486 event pairs, 935 based on Foata normal form. 5/5591 useless extension candidates. Maximal degree in co-relation 48831. Up to 5513 conditions per place. [2024-06-21 16:10:07,050 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 263 selfloop transitions, 28 changer transitions 0/294 dead transitions. [2024-06-21 16:10:07,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 294 transitions, 3234 flow [2024-06-21 16:10:07,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:10:07,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:10:07,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 16:10:07,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39867109634551495 [2024-06-21 16:10:07,051 INFO L175 Difference]: Start difference. First operand has 217 places, 274 transitions, 2432 flow. Second operand 7 states and 120 transitions. [2024-06-21 16:10:07,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 294 transitions, 3234 flow [2024-06-21 16:10:07,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 294 transitions, 3180 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 16:10:07,998 INFO L231 Difference]: Finished difference. Result has 220 places, 277 transitions, 2488 flow [2024-06-21 16:10:07,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2378, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2488, PETRI_PLACES=220, PETRI_TRANSITIONS=277} [2024-06-21 16:10:07,999 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 176 predicate places. [2024-06-21 16:10:07,999 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 277 transitions, 2488 flow [2024-06-21 16:10:07,999 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 16:10:07,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:07,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:08,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 16:10:08,000 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 16:10:08,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:08,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1450807754, now seen corresponding path program 3 times [2024-06-21 16:10:08,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:08,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528849436] [2024-06-21 16:10:08,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:08,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:08,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:08,703 INFO 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 16:10:08,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:08,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528849436] [2024-06-21 16:10:08,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528849436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:08,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:08,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:10:08,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710854723] [2024-06-21 16:10:08,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:08,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:10:08,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:08,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:10:08,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:10:08,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 16:10:08,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 277 transitions, 2488 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 16:10:08,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:08,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 16:10:08,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:09,869 INFO L124 PetriNetUnfolderBase]: 3794/5585 cut-off events. [2024-06-21 16:10:09,870 INFO L125 PetriNetUnfolderBase]: For 688586/688589 co-relation queries the response was YES. [2024-06-21 16:10:09,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49188 conditions, 5585 events. 3794/5585 cut-off events. For 688586/688589 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 27462 event pairs, 945 based on Foata normal form. 1/5583 useless extension candidates. Maximal degree in co-relation 49084. Up to 5536 conditions per place. [2024-06-21 16:10:09,930 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 258 selfloop transitions, 26 changer transitions 0/287 dead transitions. [2024-06-21 16:10:09,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 287 transitions, 3080 flow [2024-06-21 16:10:09,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:10:09,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:10:09,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-21 16:10:09,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3754152823920266 [2024-06-21 16:10:09,932 INFO L175 Difference]: Start difference. First operand has 220 places, 277 transitions, 2488 flow. Second operand 7 states and 113 transitions. [2024-06-21 16:10:09,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 287 transitions, 3080 flow [2024-06-21 16:10:10,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 287 transitions, 2966 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-21 16:10:10,530 INFO L231 Difference]: Finished difference. Result has 222 places, 277 transitions, 2432 flow [2024-06-21 16:10:10,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2374, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2432, PETRI_PLACES=222, PETRI_TRANSITIONS=277} [2024-06-21 16:10:10,531 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 178 predicate places. [2024-06-21 16:10:10,531 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 277 transitions, 2432 flow [2024-06-21 16:10:10,531 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 16:10:10,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:10,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:10,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 16:10:10,531 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 16:10:10,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:10,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1450540627, now seen corresponding path program 3 times [2024-06-21 16:10:10,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:10,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187939728] [2024-06-21 16:10:10,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:10,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:10,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:11,152 INFO 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 16:10:11,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:11,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187939728] [2024-06-21 16:10:11,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187939728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:11,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:11,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:10:11,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068977795] [2024-06-21 16:10:11,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:11,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:10:11,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:11,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:10:11,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:10:11,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 16:10:11,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 277 transitions, 2432 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 16:10:11,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:11,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 16:10:11,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:12,402 INFO L124 PetriNetUnfolderBase]: 3785/5573 cut-off events. [2024-06-21 16:10:12,403 INFO L125 PetriNetUnfolderBase]: For 704539/704542 co-relation queries the response was YES. [2024-06-21 16:10:12,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49040 conditions, 5573 events. 3785/5573 cut-off events. For 704539/704542 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 27475 event pairs, 935 based on Foata normal form. 5/5575 useless extension candidates. Maximal degree in co-relation 48935. Up to 5502 conditions per place. [2024-06-21 16:10:12,463 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 259 selfloop transitions, 29 changer transitions 0/291 dead transitions. [2024-06-21 16:10:12,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 291 transitions, 3044 flow [2024-06-21 16:10:12,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:10:12,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:10:12,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-21 16:10:12,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3853820598006645 [2024-06-21 16:10:12,464 INFO L175 Difference]: Start difference. First operand has 222 places, 277 transitions, 2432 flow. Second operand 7 states and 116 transitions. [2024-06-21 16:10:12,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 291 transitions, 3044 flow [2024-06-21 16:10:13,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 291 transitions, 2940 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-21 16:10:13,123 INFO L231 Difference]: Finished difference. Result has 221 places, 277 transitions, 2393 flow [2024-06-21 16:10:13,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2328, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2393, PETRI_PLACES=221, PETRI_TRANSITIONS=277} [2024-06-21 16:10:13,124 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 177 predicate places. [2024-06-21 16:10:13,124 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 277 transitions, 2393 flow [2024-06-21 16:10:13,124 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 16:10:13,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:13,124 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 16:10:13,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 16:10:13,125 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 16:10:13,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:13,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1102615518, now seen corresponding path program 1 times [2024-06-21 16:10:13,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:13,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695186621] [2024-06-21 16:10:13,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:13,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:13,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:14,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:14,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:14,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695186621] [2024-06-21 16:10:14,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695186621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:14,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:14,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:10:14,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185478023] [2024-06-21 16:10:14,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:14,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:10:14,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:14,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:10:14,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:10:14,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:10:14,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 277 transitions, 2393 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 16:10:14,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:14,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:10:14,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:16,240 INFO L124 PetriNetUnfolderBase]: 3538/5395 cut-off events. [2024-06-21 16:10:16,240 INFO L125 PetriNetUnfolderBase]: For 787933/787933 co-relation queries the response was YES. [2024-06-21 16:10:16,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49614 conditions, 5395 events. 3538/5395 cut-off events. For 787933/787933 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 29098 event pairs, 696 based on Foata normal form. 16/5389 useless extension candidates. Maximal degree in co-relation 49509. Up to 4654 conditions per place. [2024-06-21 16:10:16,311 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 290 selfloop transitions, 33 changer transitions 0/347 dead transitions. [2024-06-21 16:10:16,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 347 transitions, 3607 flow [2024-06-21 16:10:16,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:10:16,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:10:16,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 242 transitions. [2024-06-21 16:10:16,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4689922480620155 [2024-06-21 16:10:16,312 INFO L175 Difference]: Start difference. First operand has 221 places, 277 transitions, 2393 flow. Second operand 12 states and 242 transitions. [2024-06-21 16:10:16,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 347 transitions, 3607 flow [2024-06-21 16:10:16,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 347 transitions, 3539 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 16:10:16,986 INFO L231 Difference]: Finished difference. Result has 228 places, 282 transitions, 2539 flow [2024-06-21 16:10:16,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2325, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2539, PETRI_PLACES=228, PETRI_TRANSITIONS=282} [2024-06-21 16:10:16,987 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 184 predicate places. [2024-06-21 16:10:16,987 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 282 transitions, 2539 flow [2024-06-21 16:10:16,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 16:10:16,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:16,987 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 16:10:16,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 16:10:16,988 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:16,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:16,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1552275704, now seen corresponding path program 2 times [2024-06-21 16:10:16,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:16,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201326384] [2024-06-21 16:10:16,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:16,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:16,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:18,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:18,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:18,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201326384] [2024-06-21 16:10:18,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201326384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:18,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:18,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:10:18,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059864266] [2024-06-21 16:10:18,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:18,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:10:18,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:18,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:10:18,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:10:18,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:10:18,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 282 transitions, 2539 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 16:10:18,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:18,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:10:18,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:19,704 INFO L124 PetriNetUnfolderBase]: 3638/5581 cut-off events. [2024-06-21 16:10:19,704 INFO L125 PetriNetUnfolderBase]: For 846880/846880 co-relation queries the response was YES. [2024-06-21 16:10:19,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51537 conditions, 5581 events. 3638/5581 cut-off events. For 846880/846880 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 30699 event pairs, 877 based on Foata normal form. 36/5595 useless extension candidates. Maximal degree in co-relation 51430. Up to 4950 conditions per place. [2024-06-21 16:10:19,770 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 292 selfloop transitions, 31 changer transitions 0/347 dead transitions. [2024-06-21 16:10:19,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 347 transitions, 3495 flow [2024-06-21 16:10:19,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 16:10:19,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 16:10:19,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 251 transitions. [2024-06-21 16:10:19,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4490161001788909 [2024-06-21 16:10:19,771 INFO L175 Difference]: Start difference. First operand has 228 places, 282 transitions, 2539 flow. Second operand 13 states and 251 transitions. [2024-06-21 16:10:19,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 347 transitions, 3495 flow [2024-06-21 16:10:20,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 347 transitions, 3420 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-21 16:10:20,578 INFO L231 Difference]: Finished difference. Result has 235 places, 284 transitions, 2651 flow [2024-06-21 16:10:20,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2468, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2651, PETRI_PLACES=235, PETRI_TRANSITIONS=284} [2024-06-21 16:10:20,579 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 191 predicate places. [2024-06-21 16:10:20,579 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 284 transitions, 2651 flow [2024-06-21 16:10:20,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 16:10:20,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:20,579 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 16:10:20,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 16:10:20,579 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:20,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:20,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1552271984, now seen corresponding path program 3 times [2024-06-21 16:10:20,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:20,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599256517] [2024-06-21 16:10:20,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:20,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:20,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:21,959 INFO 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 16:10:21,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:21,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599256517] [2024-06-21 16:10:21,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599256517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:21,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:21,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:10:21,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592418376] [2024-06-21 16:10:21,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:21,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:10:21,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:21,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:10:21,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:10:22,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:10:22,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 284 transitions, 2651 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 16:10:22,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:22,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:10:22,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:23,586 INFO L124 PetriNetUnfolderBase]: 3610/5537 cut-off events. [2024-06-21 16:10:23,587 INFO L125 PetriNetUnfolderBase]: For 807932/807932 co-relation queries the response was YES. [2024-06-21 16:10:23,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50406 conditions, 5537 events. 3610/5537 cut-off events. For 807932/807932 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 30381 event pairs, 837 based on Foata normal form. 16/5531 useless extension candidates. Maximal degree in co-relation 50297. Up to 4796 conditions per place. [2024-06-21 16:10:23,643 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 291 selfloop transitions, 32 changer transitions 0/347 dead transitions. [2024-06-21 16:10:23,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 347 transitions, 3509 flow [2024-06-21 16:10:23,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:10:23,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:10:23,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 239 transitions. [2024-06-21 16:10:23,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4631782945736434 [2024-06-21 16:10:23,645 INFO L175 Difference]: Start difference. First operand has 235 places, 284 transitions, 2651 flow. Second operand 12 states and 239 transitions. [2024-06-21 16:10:23,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 347 transitions, 3509 flow [2024-06-21 16:10:24,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 347 transitions, 3344 flow, removed 47 selfloop flow, removed 12 redundant places. [2024-06-21 16:10:24,460 INFO L231 Difference]: Finished difference. Result has 235 places, 284 transitions, 2556 flow [2024-06-21 16:10:24,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2486, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2556, PETRI_PLACES=235, PETRI_TRANSITIONS=284} [2024-06-21 16:10:24,460 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 191 predicate places. [2024-06-21 16:10:24,461 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 284 transitions, 2556 flow [2024-06-21 16:10:24,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 16:10:24,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:24,461 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 16:10:24,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 16:10:24,461 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:24,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:24,462 INFO L85 PathProgramCache]: Analyzing trace with hash 918170638, now seen corresponding path program 4 times [2024-06-21 16:10:24,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:24,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469889488] [2024-06-21 16:10:24,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:24,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:24,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:26,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:26,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:26,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469889488] [2024-06-21 16:10:26,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469889488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:26,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:26,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:10:26,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024100789] [2024-06-21 16:10:26,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:26,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:10:26,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:26,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:10:26,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:10:26,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:10:26,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 284 transitions, 2556 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 16:10:26,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:26,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:10:26,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:27,573 INFO L124 PetriNetUnfolderBase]: 3685/5668 cut-off events. [2024-06-21 16:10:27,573 INFO L125 PetriNetUnfolderBase]: For 836797/836804 co-relation queries the response was YES. [2024-06-21 16:10:27,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50890 conditions, 5668 events. 3685/5668 cut-off events. For 836797/836804 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 31392 event pairs, 744 based on Foata normal form. 24/5665 useless extension candidates. Maximal degree in co-relation 50780. Up to 4246 conditions per place. [2024-06-21 16:10:27,639 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 193 selfloop transitions, 119 changer transitions 0/336 dead transitions. [2024-06-21 16:10:27,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 336 transitions, 3444 flow [2024-06-21 16:10:27,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:10:27,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:10:27,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-21 16:10:27,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4906976744186046 [2024-06-21 16:10:27,641 INFO L175 Difference]: Start difference. First operand has 235 places, 284 transitions, 2556 flow. Second operand 10 states and 211 transitions. [2024-06-21 16:10:27,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 336 transitions, 3444 flow [2024-06-21 16:10:28,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 336 transitions, 3372 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-21 16:10:28,233 INFO L231 Difference]: Finished difference. Result has 235 places, 285 transitions, 2789 flow [2024-06-21 16:10:28,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2484, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2789, PETRI_PLACES=235, PETRI_TRANSITIONS=285} [2024-06-21 16:10:28,234 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 191 predicate places. [2024-06-21 16:10:28,234 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 285 transitions, 2789 flow [2024-06-21 16:10:28,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 16:10:28,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:28,235 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 16:10:28,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 16:10:28,235 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:28,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:28,235 INFO L85 PathProgramCache]: Analyzing trace with hash 918022768, now seen corresponding path program 5 times [2024-06-21 16:10:28,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:28,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916084943] [2024-06-21 16:10:28,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:28,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:28,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:30,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:30,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:30,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916084943] [2024-06-21 16:10:30,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916084943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:30,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:30,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:10:30,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896205224] [2024-06-21 16:10:30,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:30,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:10:30,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:30,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:10:30,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:10:30,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:10:30,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 285 transitions, 2789 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 16:10:30,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:30,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:10:30,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:31,637 INFO L124 PetriNetUnfolderBase]: 3945/6092 cut-off events. [2024-06-21 16:10:31,638 INFO L125 PetriNetUnfolderBase]: For 910849/910856 co-relation queries the response was YES. [2024-06-21 16:10:31,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56327 conditions, 6092 events. 3945/6092 cut-off events. For 910849/910856 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 34425 event pairs, 798 based on Foata normal form. 16/6081 useless extension candidates. Maximal degree in co-relation 56216. Up to 4689 conditions per place. [2024-06-21 16:10:31,713 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 227 selfloop transitions, 106 changer transitions 0/357 dead transitions. [2024-06-21 16:10:31,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 357 transitions, 4205 flow [2024-06-21 16:10:31,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:10:31,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:10:31,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 229 transitions. [2024-06-21 16:10:31,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48414376321353064 [2024-06-21 16:10:31,714 INFO L175 Difference]: Start difference. First operand has 235 places, 285 transitions, 2789 flow. Second operand 11 states and 229 transitions. [2024-06-21 16:10:31,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 357 transitions, 4205 flow [2024-06-21 16:10:32,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 357 transitions, 3878 flow, removed 36 selfloop flow, removed 8 redundant places. [2024-06-21 16:10:32,695 INFO L231 Difference]: Finished difference. Result has 240 places, 300 transitions, 3072 flow [2024-06-21 16:10:32,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2518, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3072, PETRI_PLACES=240, PETRI_TRANSITIONS=300} [2024-06-21 16:10:32,696 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 196 predicate places. [2024-06-21 16:10:32,696 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 300 transitions, 3072 flow [2024-06-21 16:10:32,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 16:10:32,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:32,696 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 16:10:32,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 16:10:32,697 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:32,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:32,697 INFO L85 PathProgramCache]: Analyzing trace with hash 923533018, now seen corresponding path program 6 times [2024-06-21 16:10:32,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:32,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096664887] [2024-06-21 16:10:32,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:32,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:32,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:34,036 INFO 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 16:10:34,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:34,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096664887] [2024-06-21 16:10:34,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096664887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:34,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:34,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:10:34,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749489065] [2024-06-21 16:10:34,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:34,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:10:34,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:34,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:10:34,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:10:34,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:10:34,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 300 transitions, 3072 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 16:10:34,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:34,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:10:34,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:35,664 INFO L124 PetriNetUnfolderBase]: 3967/6134 cut-off events. [2024-06-21 16:10:35,664 INFO L125 PetriNetUnfolderBase]: For 932168/932175 co-relation queries the response was YES. [2024-06-21 16:10:35,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55656 conditions, 6134 events. 3967/6134 cut-off events. For 932168/932175 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 34859 event pairs, 803 based on Foata normal form. 36/6143 useless extension candidates. Maximal degree in co-relation 55542. Up to 4629 conditions per place. [2024-06-21 16:10:35,737 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 193 selfloop transitions, 132 changer transitions 0/349 dead transitions. [2024-06-21 16:10:35,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 349 transitions, 3962 flow [2024-06-21 16:10:35,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:10:35,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:10:35,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 209 transitions. [2024-06-21 16:10:35,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48604651162790696 [2024-06-21 16:10:35,738 INFO L175 Difference]: Start difference. First operand has 240 places, 300 transitions, 3072 flow. Second operand 10 states and 209 transitions. [2024-06-21 16:10:35,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 349 transitions, 3962 flow [2024-06-21 16:10:36,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 349 transitions, 3780 flow, removed 62 selfloop flow, removed 5 redundant places. [2024-06-21 16:10:36,840 INFO L231 Difference]: Finished difference. Result has 245 places, 301 transitions, 3239 flow [2024-06-21 16:10:36,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2902, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3239, PETRI_PLACES=245, PETRI_TRANSITIONS=301} [2024-06-21 16:10:36,841 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 201 predicate places. [2024-06-21 16:10:36,841 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 301 transitions, 3239 flow [2024-06-21 16:10:36,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 16:10:36,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:36,841 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 16:10:36,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 16:10:36,841 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 16:10:36,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:36,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1417559041, now seen corresponding path program 1 times [2024-06-21 16:10:36,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:36,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855659996] [2024-06-21 16:10:36,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:36,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:36,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:38,243 INFO 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 16:10:38,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:38,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855659996] [2024-06-21 16:10:38,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855659996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:38,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:38,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:10:38,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658314968] [2024-06-21 16:10:38,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:38,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:10:38,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:38,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:10:38,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:10:38,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:10:38,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 301 transitions, 3239 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 16:10:38,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:38,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:10:38,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:39,667 INFO L124 PetriNetUnfolderBase]: 4365/6613 cut-off events. [2024-06-21 16:10:39,668 INFO L125 PetriNetUnfolderBase]: For 905098/905105 co-relation queries the response was YES. [2024-06-21 16:10:39,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58927 conditions, 6613 events. 4365/6613 cut-off events. For 905098/905105 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 35925 event pairs, 942 based on Foata normal form. 4/6605 useless extension candidates. Maximal degree in co-relation 58812. Up to 6017 conditions per place. [2024-06-21 16:10:39,750 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 261 selfloop transitions, 71 changer transitions 0/348 dead transitions. [2024-06-21 16:10:39,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 348 transitions, 4122 flow [2024-06-21 16:10:39,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:10:39,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:10:39,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-21 16:10:39,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4441860465116279 [2024-06-21 16:10:39,751 INFO L175 Difference]: Start difference. First operand has 245 places, 301 transitions, 3239 flow. Second operand 10 states and 191 transitions. [2024-06-21 16:10:39,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 348 transitions, 4122 flow [2024-06-21 16:10:40,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 348 transitions, 3811 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-21 16:10:40,561 INFO L231 Difference]: Finished difference. Result has 248 places, 306 transitions, 3188 flow [2024-06-21 16:10:40,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2932, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3188, PETRI_PLACES=248, PETRI_TRANSITIONS=306} [2024-06-21 16:10:40,562 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 204 predicate places. [2024-06-21 16:10:40,562 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 306 transitions, 3188 flow [2024-06-21 16:10:40,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 16:10:40,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:40,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:40,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 16:10:40,562 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:40,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:40,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1943023931, now seen corresponding path program 1 times [2024-06-21 16:10:40,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:40,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123926901] [2024-06-21 16:10:40,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:40,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:40,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:41,495 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 16:10:41,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:41,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123926901] [2024-06-21 16:10:41,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123926901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:41,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:41,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:10:41,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575488314] [2024-06-21 16:10:41,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:41,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:10:41,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:41,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:10:41,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:10:41,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:10:41,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 306 transitions, 3188 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:41,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:41,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:10:41,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:42,788 INFO L124 PetriNetUnfolderBase]: 4131/6371 cut-off events. [2024-06-21 16:10:42,789 INFO L125 PetriNetUnfolderBase]: For 939697/939714 co-relation queries the response was YES. [2024-06-21 16:10:42,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58025 conditions, 6371 events. 4131/6371 cut-off events. For 939697/939714 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 35734 event pairs, 1082 based on Foata normal form. 11/6343 useless extension candidates. Maximal degree in co-relation 57908. Up to 5840 conditions per place. [2024-06-21 16:10:42,867 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 257 selfloop transitions, 47 changer transitions 0/347 dead transitions. [2024-06-21 16:10:42,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 347 transitions, 4336 flow [2024-06-21 16:10:42,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:10:42,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:10:42,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-21 16:10:42,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47093023255813954 [2024-06-21 16:10:42,868 INFO L175 Difference]: Start difference. First operand has 248 places, 306 transitions, 3188 flow. Second operand 8 states and 162 transitions. [2024-06-21 16:10:42,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 347 transitions, 4336 flow [2024-06-21 16:10:43,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 347 transitions, 4123 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-21 16:10:43,874 INFO L231 Difference]: Finished difference. Result has 251 places, 316 transitions, 3249 flow [2024-06-21 16:10:43,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2975, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3249, PETRI_PLACES=251, PETRI_TRANSITIONS=316} [2024-06-21 16:10:43,874 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 207 predicate places. [2024-06-21 16:10:43,874 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 316 transitions, 3249 flow [2024-06-21 16:10:43,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:43,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:43,875 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 16:10:43,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 16:10:43,875 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:43,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:43,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1147741106, now seen corresponding path program 1 times [2024-06-21 16:10:43,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:43,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147187638] [2024-06-21 16:10:43,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:43,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:43,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:44,527 INFO 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 16:10:44,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:44,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147187638] [2024-06-21 16:10:44,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147187638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:44,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:44,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:10:44,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147373151] [2024-06-21 16:10:44,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:44,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:10:44,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:44,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:10:44,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:10:44,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 16:10:44,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 316 transitions, 3249 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 16:10:44,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:44,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 16:10:44,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:45,821 INFO L124 PetriNetUnfolderBase]: 4563/6844 cut-off events. [2024-06-21 16:10:45,822 INFO L125 PetriNetUnfolderBase]: For 954636/954639 co-relation queries the response was YES. [2024-06-21 16:10:45,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61787 conditions, 6844 events. 4563/6844 cut-off events. For 954636/954639 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 36582 event pairs, 1161 based on Foata normal form. 3/6844 useless extension candidates. Maximal degree in co-relation 61667. Up to 6757 conditions per place. [2024-06-21 16:10:45,908 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 308 selfloop transitions, 35 changer transitions 0/346 dead transitions. [2024-06-21 16:10:45,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 346 transitions, 4479 flow [2024-06-21 16:10:45,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:10:45,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:10:45,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-21 16:10:45,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152823920265781 [2024-06-21 16:10:45,909 INFO L175 Difference]: Start difference. First operand has 251 places, 316 transitions, 3249 flow. Second operand 7 states and 125 transitions. [2024-06-21 16:10:45,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 346 transitions, 4479 flow [2024-06-21 16:10:46,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 346 transitions, 4399 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-21 16:10:46,827 INFO L231 Difference]: Finished difference. Result has 255 places, 325 transitions, 3443 flow [2024-06-21 16:10:46,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3169, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3443, PETRI_PLACES=255, PETRI_TRANSITIONS=325} [2024-06-21 16:10:46,828 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 211 predicate places. [2024-06-21 16:10:46,828 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 325 transitions, 3443 flow [2024-06-21 16:10:46,828 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 16:10:46,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:46,828 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 16:10:46,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 16:10:46,829 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:46,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:46,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1931919824, now seen corresponding path program 2 times [2024-06-21 16:10:46,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:46,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569389189] [2024-06-21 16:10:46,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:46,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:46,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:47,441 INFO 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 16:10:47,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:47,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569389189] [2024-06-21 16:10:47,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569389189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:47,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:47,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:10:47,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641099053] [2024-06-21 16:10:47,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:47,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:10:47,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:47,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:10:47,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:10:47,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 16:10:47,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 325 transitions, 3443 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 16:10:47,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:47,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 16:10:47,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:48,712 INFO L124 PetriNetUnfolderBase]: 4576/6862 cut-off events. [2024-06-21 16:10:48,712 INFO L125 PetriNetUnfolderBase]: For 983391/983394 co-relation queries the response was YES. [2024-06-21 16:10:48,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62658 conditions, 6862 events. 4576/6862 cut-off events. For 983391/983394 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 36699 event pairs, 1163 based on Foata normal form. 3/6862 useless extension candidates. Maximal degree in co-relation 62536. Up to 6772 conditions per place. [2024-06-21 16:10:48,801 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 305 selfloop transitions, 41 changer transitions 0/349 dead transitions. [2024-06-21 16:10:48,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 349 transitions, 4623 flow [2024-06-21 16:10:48,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:10:48,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:10:48,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 16:10:48,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-21 16:10:48,802 INFO L175 Difference]: Start difference. First operand has 255 places, 325 transitions, 3443 flow. Second operand 7 states and 122 transitions. [2024-06-21 16:10:48,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 349 transitions, 4623 flow [2024-06-21 16:10:49,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 349 transitions, 4491 flow, removed 59 selfloop flow, removed 2 redundant places. [2024-06-21 16:10:49,732 INFO L231 Difference]: Finished difference. Result has 260 places, 331 transitions, 3539 flow [2024-06-21 16:10:49,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3341, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3539, PETRI_PLACES=260, PETRI_TRANSITIONS=331} [2024-06-21 16:10:49,733 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 216 predicate places. [2024-06-21 16:10:49,733 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 331 transitions, 3539 flow [2024-06-21 16:10:49,733 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 16:10:49,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:49,733 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 16:10:49,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 16:10:49,734 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 16:10:49,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:49,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1757872346, now seen corresponding path program 7 times [2024-06-21 16:10:49,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:49,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701070124] [2024-06-21 16:10:49,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:49,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:49,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:50,964 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 16:10:50,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:50,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701070124] [2024-06-21 16:10:50,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701070124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:50,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:50,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:10:50,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764250557] [2024-06-21 16:10:50,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:50,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:10:50,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:50,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:10:50,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:10:51,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:10:51,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 331 transitions, 3539 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 16:10:51,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:51,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:10:51,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:52,554 INFO L124 PetriNetUnfolderBase]: 4120/6384 cut-off events. [2024-06-21 16:10:52,554 INFO L125 PetriNetUnfolderBase]: For 1053389/1053422 co-relation queries the response was YES. [2024-06-21 16:10:52,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60150 conditions, 6384 events. 4120/6384 cut-off events. For 1053389/1053422 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 36610 event pairs, 913 based on Foata normal form. 24/6374 useless extension candidates. Maximal degree in co-relation 60026. Up to 5537 conditions per place. [2024-06-21 16:10:52,637 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 278 selfloop transitions, 68 changer transitions 0/377 dead transitions. [2024-06-21 16:10:52,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 377 transitions, 4455 flow [2024-06-21 16:10:52,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:10:52,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:10:52,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-21 16:10:52,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4720930232558139 [2024-06-21 16:10:52,639 INFO L175 Difference]: Start difference. First operand has 260 places, 331 transitions, 3539 flow. Second operand 10 states and 203 transitions. [2024-06-21 16:10:52,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 377 transitions, 4455 flow [2024-06-21 16:10:53,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 377 transitions, 4360 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-21 16:10:53,766 INFO L231 Difference]: Finished difference. Result has 267 places, 332 transitions, 3658 flow [2024-06-21 16:10:53,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3444, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3658, PETRI_PLACES=267, PETRI_TRANSITIONS=332} [2024-06-21 16:10:53,767 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 223 predicate places. [2024-06-21 16:10:53,767 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 332 transitions, 3658 flow [2024-06-21 16:10:53,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 16:10:53,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:53,767 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 16:10:53,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 16:10:53,767 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:53,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:53,768 INFO L85 PathProgramCache]: Analyzing trace with hash -583438914, now seen corresponding path program 8 times [2024-06-21 16:10:53,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:53,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527538939] [2024-06-21 16:10:53,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:53,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:53,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:55,076 INFO 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 16:10:55,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:55,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527538939] [2024-06-21 16:10:55,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527538939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:55,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:55,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:10:55,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446052870] [2024-06-21 16:10:55,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:55,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:10:55,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:55,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:10:55,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:10:55,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:10:55,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 332 transitions, 3658 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 16:10:55,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:55,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:10:55,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:56,962 INFO L124 PetriNetUnfolderBase]: 4389/6831 cut-off events. [2024-06-21 16:10:56,963 INFO L125 PetriNetUnfolderBase]: For 1157388/1157421 co-relation queries the response was YES. [2024-06-21 16:10:57,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66370 conditions, 6831 events. 4389/6831 cut-off events. For 1157388/1157421 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 39979 event pairs, 955 based on Foata normal form. 16/6813 useless extension candidates. Maximal degree in co-relation 66245. Up to 5675 conditions per place. [2024-06-21 16:10:57,052 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 285 selfloop transitions, 73 changer transitions 0/389 dead transitions. [2024-06-21 16:10:57,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 389 transitions, 5031 flow [2024-06-21 16:10:57,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:10:57,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:10:57,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 223 transitions. [2024-06-21 16:10:57,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714587737843552 [2024-06-21 16:10:57,054 INFO L175 Difference]: Start difference. First operand has 267 places, 332 transitions, 3658 flow. Second operand 11 states and 223 transitions. [2024-06-21 16:10:57,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 389 transitions, 5031 flow [2024-06-21 16:10:58,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 389 transitions, 4816 flow, removed 42 selfloop flow, removed 8 redundant places. [2024-06-21 16:10:58,563 INFO L231 Difference]: Finished difference. Result has 271 places, 335 transitions, 3817 flow [2024-06-21 16:10:58,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3486, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3817, PETRI_PLACES=271, PETRI_TRANSITIONS=335} [2024-06-21 16:10:58,569 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 227 predicate places. [2024-06-21 16:10:58,569 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 335 transitions, 3817 flow [2024-06-21 16:10:58,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 16:10:58,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:58,570 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 16:10:58,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 16:10:58,570 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:58,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:58,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1964943077, now seen corresponding path program 2 times [2024-06-21 16:10:58,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:58,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472848471] [2024-06-21 16:10:58,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:58,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:58,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:59,843 INFO 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 16:10:59,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:59,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472848471] [2024-06-21 16:10:59,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472848471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:59,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:59,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:10:59,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596681548] [2024-06-21 16:10:59,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:59,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:10:59,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:59,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:10:59,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:10:59,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:10:59,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 335 transitions, 3817 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 16:10:59,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:59,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:10:59,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:01,545 INFO L124 PetriNetUnfolderBase]: 4858/7396 cut-off events. [2024-06-21 16:11:01,545 INFO L125 PetriNetUnfolderBase]: For 1164110/1164137 co-relation queries the response was YES. [2024-06-21 16:11:01,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70182 conditions, 7396 events. 4858/7396 cut-off events. For 1164110/1164137 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 41466 event pairs, 1190 based on Foata normal form. 4/7384 useless extension candidates. Maximal degree in co-relation 70055. Up to 7019 conditions per place. [2024-06-21 16:11:01,648 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 313 selfloop transitions, 43 changer transitions 0/378 dead transitions. [2024-06-21 16:11:01,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 378 transitions, 4744 flow [2024-06-21 16:11:01,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:11:01,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:11:01,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-21 16:11:01,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-21 16:11:01,656 INFO L175 Difference]: Start difference. First operand has 271 places, 335 transitions, 3817 flow. Second operand 10 states and 185 transitions. [2024-06-21 16:11:01,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 378 transitions, 4744 flow [2024-06-21 16:11:03,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 378 transitions, 4586 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-21 16:11:03,117 INFO L231 Difference]: Finished difference. Result has 275 places, 340 transitions, 3881 flow [2024-06-21 16:11:03,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3664, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3881, PETRI_PLACES=275, PETRI_TRANSITIONS=340} [2024-06-21 16:11:03,118 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 231 predicate places. [2024-06-21 16:11:03,118 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 340 transitions, 3881 flow [2024-06-21 16:11:03,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 16:11:03,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:03,118 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 16:11:03,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 16:11:03,119 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:11:03,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:03,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1964952377, now seen corresponding path program 3 times [2024-06-21 16:11:03,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:03,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320759519] [2024-06-21 16:11:03,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:03,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:03,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:04,335 INFO 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 16:11:04,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:04,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320759519] [2024-06-21 16:11:04,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320759519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:04,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:04,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:11:04,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9915457] [2024-06-21 16:11:04,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:04,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:11:04,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:04,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:11:04,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:11:04,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:11:04,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 340 transitions, 3881 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 16:11:04,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:04,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:11:04,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:06,108 INFO L124 PetriNetUnfolderBase]: 4879/7427 cut-off events. [2024-06-21 16:11:06,109 INFO L125 PetriNetUnfolderBase]: For 1184007/1184036 co-relation queries the response was YES. [2024-06-21 16:11:06,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70427 conditions, 7427 events. 4879/7427 cut-off events. For 1184007/1184036 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 41697 event pairs, 1211 based on Foata normal form. 4/7410 useless extension candidates. Maximal degree in co-relation 70298. Up to 7052 conditions per place. [2024-06-21 16:11:06,201 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 316 selfloop transitions, 42 changer transitions 0/380 dead transitions. [2024-06-21 16:11:06,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 380 transitions, 4779 flow [2024-06-21 16:11:06,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:11:06,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:11:06,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-21 16:11:06,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42790697674418604 [2024-06-21 16:11:06,202 INFO L175 Difference]: Start difference. First operand has 275 places, 340 transitions, 3881 flow. Second operand 10 states and 184 transitions. [2024-06-21 16:11:06,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 380 transitions, 4779 flow [2024-06-21 16:11:07,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 380 transitions, 4624 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-21 16:11:07,879 INFO L231 Difference]: Finished difference. Result has 278 places, 342 transitions, 3905 flow [2024-06-21 16:11:07,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3726, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3905, PETRI_PLACES=278, PETRI_TRANSITIONS=342} [2024-06-21 16:11:07,880 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 234 predicate places. [2024-06-21 16:11:07,880 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 342 transitions, 3905 flow [2024-06-21 16:11:07,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 16:11:07,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:07,881 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 16:11:07,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 16:11:07,882 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:11:07,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:07,882 INFO L85 PathProgramCache]: Analyzing trace with hash -383773773, now seen corresponding path program 4 times [2024-06-21 16:11:07,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:07,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902517540] [2024-06-21 16:11:07,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:07,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:07,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:09,082 INFO 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 16:11:09,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:09,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902517540] [2024-06-21 16:11:09,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902517540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:09,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:09,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:11:09,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204193721] [2024-06-21 16:11:09,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:09,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:11:09,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:09,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:11:09,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:11:09,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:11:09,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 342 transitions, 3905 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 16:11:09,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:09,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:11:09,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:10,912 INFO L124 PetriNetUnfolderBase]: 4892/7450 cut-off events. [2024-06-21 16:11:10,912 INFO L125 PetriNetUnfolderBase]: For 1210964/1210995 co-relation queries the response was YES. [2024-06-21 16:11:10,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70975 conditions, 7450 events. 4892/7450 cut-off events. For 1210964/1210995 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 41866 event pairs, 1228 based on Foata normal form. 4/7438 useless extension candidates. Maximal degree in co-relation 70845. Up to 7046 conditions per place. [2024-06-21 16:11:11,018 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 316 selfloop transitions, 48 changer transitions 0/386 dead transitions. [2024-06-21 16:11:11,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 386 transitions, 4860 flow [2024-06-21 16:11:11,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:11:11,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:11:11,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-21 16:11:11,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4372093023255814 [2024-06-21 16:11:11,020 INFO L175 Difference]: Start difference. First operand has 278 places, 342 transitions, 3905 flow. Second operand 10 states and 188 transitions. [2024-06-21 16:11:11,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 386 transitions, 4860 flow [2024-06-21 16:11:12,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 386 transitions, 4699 flow, removed 40 selfloop flow, removed 8 redundant places. [2024-06-21 16:11:12,594 INFO L231 Difference]: Finished difference. Result has 281 places, 347 transitions, 3984 flow [2024-06-21 16:11:12,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3744, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3984, PETRI_PLACES=281, PETRI_TRANSITIONS=347} [2024-06-21 16:11:12,597 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 237 predicate places. [2024-06-21 16:11:12,597 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 347 transitions, 3984 flow [2024-06-21 16:11:12,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 16:11:12,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:12,598 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 16:11:12,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 16:11:12,598 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:11:12,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:12,599 INFO L85 PathProgramCache]: Analyzing trace with hash -577713183, now seen corresponding path program 5 times [2024-06-21 16:11:12,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:12,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000650518] [2024-06-21 16:11:12,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:12,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:12,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:13,922 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 16:11:13,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:13,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000650518] [2024-06-21 16:11:13,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000650518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:13,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:13,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:11:13,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591064259] [2024-06-21 16:11:13,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:13,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:11:13,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:13,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:11:13,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:11:14,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:11:14,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 347 transitions, 3984 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 16:11:14,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:14,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:11:14,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:15,722 INFO L124 PetriNetUnfolderBase]: 4909/7477 cut-off events. [2024-06-21 16:11:15,722 INFO L125 PetriNetUnfolderBase]: For 1243357/1243390 co-relation queries the response was YES. [2024-06-21 16:11:15,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72046 conditions, 7477 events. 4909/7477 cut-off events. For 1243357/1243390 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 42057 event pairs, 1174 based on Foata normal form. 4/7465 useless extension candidates. Maximal degree in co-relation 71914. Up to 7037 conditions per place. [2024-06-21 16:11:15,819 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 314 selfloop transitions, 55 changer transitions 0/391 dead transitions. [2024-06-21 16:11:15,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 391 transitions, 4951 flow [2024-06-21 16:11:15,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:11:15,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:11:15,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-21 16:11:15,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 16:11:15,824 INFO L175 Difference]: Start difference. First operand has 281 places, 347 transitions, 3984 flow. Second operand 10 states and 190 transitions. [2024-06-21 16:11:15,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 391 transitions, 4951 flow [2024-06-21 16:11:16,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 391 transitions, 4760 flow, removed 50 selfloop flow, removed 7 redundant places. [2024-06-21 16:11:16,846 INFO L231 Difference]: Finished difference. Result has 285 places, 352 transitions, 4045 flow [2024-06-21 16:11:16,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3793, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4045, PETRI_PLACES=285, PETRI_TRANSITIONS=352} [2024-06-21 16:11:16,847 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 241 predicate places. [2024-06-21 16:11:16,847 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 352 transitions, 4045 flow [2024-06-21 16:11:16,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 16:11:16,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:16,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:11:16,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 16:11:16,848 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:11:16,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:16,848 INFO L85 PathProgramCache]: Analyzing trace with hash -383989254, now seen corresponding path program 9 times [2024-06-21 16:11:16,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:16,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603361895] [2024-06-21 16:11:16,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:16,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:16,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:18,947 INFO 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 16:11:18,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:18,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603361895] [2024-06-21 16:11:18,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603361895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:18,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:18,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:11:18,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035313811] [2024-06-21 16:11:18,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:18,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:11:18,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:18,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:11:18,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:11:19,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:11:19,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 352 transitions, 4045 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 16:11:19,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:19,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:11:19,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:20,993 INFO L124 PetriNetUnfolderBase]: 4593/7166 cut-off events. [2024-06-21 16:11:20,993 INFO L125 PetriNetUnfolderBase]: For 1356896/1356945 co-relation queries the response was YES. [2024-06-21 16:11:21,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70434 conditions, 7166 events. 4593/7166 cut-off events. For 1356896/1356945 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 42593 event pairs, 1047 based on Foata normal form. 40/7172 useless extension candidates. Maximal degree in co-relation 70300. Up to 6356 conditions per place. [2024-06-21 16:11:21,090 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 318 selfloop transitions, 53 changer transitions 0/404 dead transitions. [2024-06-21 16:11:21,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 404 transitions, 5104 flow [2024-06-21 16:11:21,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:11:21,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:11:21,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 215 transitions. [2024-06-21 16:11:21,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 16:11:21,091 INFO L175 Difference]: Start difference. First operand has 285 places, 352 transitions, 4045 flow. Second operand 11 states and 215 transitions. [2024-06-21 16:11:21,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 404 transitions, 5104 flow [2024-06-21 16:11:22,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 404 transitions, 4899 flow, removed 50 selfloop flow, removed 7 redundant places. [2024-06-21 16:11:22,257 INFO L231 Difference]: Finished difference. Result has 290 places, 355 transitions, 4116 flow [2024-06-21 16:11:22,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3840, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4116, PETRI_PLACES=290, PETRI_TRANSITIONS=355} [2024-06-21 16:11:22,257 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 246 predicate places. [2024-06-21 16:11:22,257 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 355 transitions, 4116 flow [2024-06-21 16:11:22,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 16:11:22,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:22,258 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 16:11:22,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 16:11:22,258 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:11:22,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:22,258 INFO L85 PathProgramCache]: Analyzing trace with hash -577928664, now seen corresponding path program 10 times [2024-06-21 16:11:22,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:22,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842320817] [2024-06-21 16:11:22,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:22,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:22,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:24,123 INFO 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 16:11:24,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:24,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842320817] [2024-06-21 16:11:24,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842320817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:24,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:24,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:11:24,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871308736] [2024-06-21 16:11:24,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:24,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:11:24,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:24,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:11:24,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:11:24,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:11:24,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 355 transitions, 4116 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 16:11:24,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:24,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:11:24,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:26,108 INFO L124 PetriNetUnfolderBase]: 4613/7212 cut-off events. [2024-06-21 16:11:26,109 INFO L125 PetriNetUnfolderBase]: For 1320527/1320576 co-relation queries the response was YES. [2024-06-21 16:11:26,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69346 conditions, 7212 events. 4613/7212 cut-off events. For 1320527/1320576 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 43015 event pairs, 1023 based on Foata normal form. 36/7214 useless extension candidates. Maximal degree in co-relation 69210. Up to 6337 conditions per place. [2024-06-21 16:11:26,195 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 308 selfloop transitions, 65 changer transitions 0/406 dead transitions. [2024-06-21 16:11:26,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 406 transitions, 5114 flow [2024-06-21 16:11:26,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:11:26,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:11:26,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 220 transitions. [2024-06-21 16:11:26,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-21 16:11:26,197 INFO L175 Difference]: Start difference. First operand has 290 places, 355 transitions, 4116 flow. Second operand 11 states and 220 transitions. [2024-06-21 16:11:26,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 406 transitions, 5114 flow [2024-06-21 16:11:27,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 406 transitions, 4887 flow, removed 64 selfloop flow, removed 8 redundant places. [2024-06-21 16:11:27,718 INFO L231 Difference]: Finished difference. Result has 293 places, 356 transitions, 4110 flow [2024-06-21 16:11:27,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3889, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4110, PETRI_PLACES=293, PETRI_TRANSITIONS=356} [2024-06-21 16:11:27,719 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 249 predicate places. [2024-06-21 16:11:27,719 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 356 transitions, 4110 flow [2024-06-21 16:11:27,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 16:11:27,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:27,719 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 16:11:27,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 16:11:27,720 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 16:11:27,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:27,720 INFO L85 PathProgramCache]: Analyzing trace with hash -64703549, now seen corresponding path program 2 times [2024-06-21 16:11:27,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:27,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329774253] [2024-06-21 16:11:27,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:27,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:27,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:28,626 INFO 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 16:11:28,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:28,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329774253] [2024-06-21 16:11:28,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329774253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:28,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:28,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:11:28,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858837485] [2024-06-21 16:11:28,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:28,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:11:28,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:28,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:11:28,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:11:28,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:11:28,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 356 transitions, 4110 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:28,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:28,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:11:28,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:30,398 INFO L124 PetriNetUnfolderBase]: 4842/7529 cut-off events. [2024-06-21 16:11:30,398 INFO L125 PetriNetUnfolderBase]: For 1303651/1303684 co-relation queries the response was YES. [2024-06-21 16:11:30,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72326 conditions, 7529 events. 4842/7529 cut-off events. For 1303651/1303684 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 44395 event pairs, 1258 based on Foata normal form. 6/7485 useless extension candidates. Maximal degree in co-relation 72189. Up to 7022 conditions per place. [2024-06-21 16:11:30,500 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 296 selfloop transitions, 37 changer transitions 0/388 dead transitions. [2024-06-21 16:11:30,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 388 transitions, 5133 flow [2024-06-21 16:11:30,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:11:30,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:11:30,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 16:11:30,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-21 16:11:30,502 INFO L175 Difference]: Start difference. First operand has 293 places, 356 transitions, 4110 flow. Second operand 8 states and 156 transitions. [2024-06-21 16:11:30,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 388 transitions, 5133 flow [2024-06-21 16:11:32,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 388 transitions, 4907 flow, removed 32 selfloop flow, removed 11 redundant places. [2024-06-21 16:11:32,231 INFO L231 Difference]: Finished difference. Result has 291 places, 363 transitions, 4077 flow [2024-06-21 16:11:32,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3884, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4077, PETRI_PLACES=291, PETRI_TRANSITIONS=363} [2024-06-21 16:11:32,232 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 247 predicate places. [2024-06-21 16:11:32,232 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 363 transitions, 4077 flow [2024-06-21 16:11:32,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:32,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:32,232 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 16:11:32,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 16:11:32,232 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 16:11:32,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:32,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1834837921, now seen corresponding path program 3 times [2024-06-21 16:11:32,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:32,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702540344] [2024-06-21 16:11:32,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:32,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:32,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:33,030 INFO 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 16:11:33,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:33,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702540344] [2024-06-21 16:11:33,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702540344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:33,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:33,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:11:33,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359884244] [2024-06-21 16:11:33,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:33,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:11:33,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:33,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:11:33,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:11:33,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:11:33,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 363 transitions, 4077 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:33,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:33,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:11:33,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:34,726 INFO L124 PetriNetUnfolderBase]: 4812/7492 cut-off events. [2024-06-21 16:11:34,727 INFO L125 PetriNetUnfolderBase]: For 1307399/1307412 co-relation queries the response was YES. [2024-06-21 16:11:34,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70876 conditions, 7492 events. 4812/7492 cut-off events. For 1307399/1307412 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 44238 event pairs, 1252 based on Foata normal form. 13/7456 useless extension candidates. Maximal degree in co-relation 70739. Up to 7020 conditions per place. [2024-06-21 16:11:34,849 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 301 selfloop transitions, 30 changer transitions 0/386 dead transitions. [2024-06-21 16:11:34,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 386 transitions, 4817 flow [2024-06-21 16:11:34,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:11:34,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:11:34,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 16:11:34,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 16:11:34,850 INFO L175 Difference]: Start difference. First operand has 291 places, 363 transitions, 4077 flow. Second operand 8 states and 152 transitions. [2024-06-21 16:11:34,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 386 transitions, 4817 flow [2024-06-21 16:11:36,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 386 transitions, 4737 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-21 16:11:36,308 INFO L231 Difference]: Finished difference. Result has 295 places, 363 transitions, 4064 flow [2024-06-21 16:11:36,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3997, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4064, PETRI_PLACES=295, PETRI_TRANSITIONS=363} [2024-06-21 16:11:36,309 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 251 predicate places. [2024-06-21 16:11:36,309 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 363 transitions, 4064 flow [2024-06-21 16:11:36,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:36,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:36,310 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 16:11:36,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 16:11:36,310 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 16:11:36,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:36,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1766096174, now seen corresponding path program 3 times [2024-06-21 16:11:36,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:36,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660787867] [2024-06-21 16:11:36,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:36,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:36,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:36,959 INFO 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 16:11:36,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:36,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660787867] [2024-06-21 16:11:36,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660787867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:36,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:36,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:11:36,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108912139] [2024-06-21 16:11:36,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:36,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:11:36,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:36,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:11:36,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:11:37,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 16:11:37,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 363 transitions, 4064 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 16:11:37,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:37,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 16:11:37,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:38,602 INFO L124 PetriNetUnfolderBase]: 5248/7956 cut-off events. [2024-06-21 16:11:38,602 INFO L125 PetriNetUnfolderBase]: For 1292288/1292288 co-relation queries the response was YES. [2024-06-21 16:11:38,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73932 conditions, 7956 events. 5248/7956 cut-off events. For 1292288/1292288 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 44915 event pairs, 1317 based on Foata normal form. 1/7955 useless extension candidates. Maximal degree in co-relation 73793. Up to 7908 conditions per place. [2024-06-21 16:11:38,713 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 353 selfloop transitions, 24 changer transitions 0/380 dead transitions. [2024-06-21 16:11:38,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 380 transitions, 5034 flow [2024-06-21 16:11:38,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:11:38,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:11:38,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-21 16:11:38,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-21 16:11:38,715 INFO L175 Difference]: Start difference. First operand has 295 places, 363 transitions, 4064 flow. Second operand 7 states and 119 transitions. [2024-06-21 16:11:38,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 380 transitions, 5034 flow [2024-06-21 16:11:40,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 380 transitions, 4936 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 16:11:40,726 INFO L231 Difference]: Finished difference. Result has 295 places, 363 transitions, 4020 flow [2024-06-21 16:11:40,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3966, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4020, PETRI_PLACES=295, PETRI_TRANSITIONS=363} [2024-06-21 16:11:40,727 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 251 predicate places. [2024-06-21 16:11:40,727 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 363 transitions, 4020 flow [2024-06-21 16:11:40,727 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 16:11:40,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:40,727 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 16:11:40,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 16:11:40,727 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 16:11:40,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:40,728 INFO L85 PathProgramCache]: Analyzing trace with hash 2053256592, now seen corresponding path program 4 times [2024-06-21 16:11:40,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:40,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082259940] [2024-06-21 16:11:40,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:40,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:40,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:41,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:11:41,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:41,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082259940] [2024-06-21 16:11:41,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082259940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:41,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:41,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:11:41,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87943125] [2024-06-21 16:11:41,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:41,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:11:41,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:41,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:11:41,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:11:41,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 16:11:41,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 363 transitions, 4020 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 16:11:41,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:41,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 16:11:41,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:43,037 INFO L124 PetriNetUnfolderBase]: 5253/7963 cut-off events. [2024-06-21 16:11:43,037 INFO L125 PetriNetUnfolderBase]: For 1318897/1318897 co-relation queries the response was YES. [2024-06-21 16:11:43,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74208 conditions, 7963 events. 5253/7963 cut-off events. For 1318897/1318897 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 44905 event pairs, 1315 based on Foata normal form. 1/7962 useless extension candidates. Maximal degree in co-relation 74068. Up to 7930 conditions per place. [2024-06-21 16:11:43,143 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 357 selfloop transitions, 19 changer transitions 0/379 dead transitions. [2024-06-21 16:11:43,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 379 transitions, 4873 flow [2024-06-21 16:11:43,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:11:43,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:11:43,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-21 16:11:43,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3787375415282392 [2024-06-21 16:11:43,144 INFO L175 Difference]: Start difference. First operand has 295 places, 363 transitions, 4020 flow. Second operand 7 states and 114 transitions. [2024-06-21 16:11:43,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 379 transitions, 4873 flow [2024-06-21 16:11:44,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 379 transitions, 4771 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 16:11:44,871 INFO L231 Difference]: Finished difference. Result has 296 places, 366 transitions, 4037 flow [2024-06-21 16:11:44,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3934, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4037, PETRI_PLACES=296, PETRI_TRANSITIONS=366} [2024-06-21 16:11:44,871 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 252 predicate places. [2024-06-21 16:11:44,871 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 366 transitions, 4037 flow [2024-06-21 16:11:44,871 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 16:11:44,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:44,872 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 16:11:44,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 16:11:44,872 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 16:11:44,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:44,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1954870738, now seen corresponding path program 5 times [2024-06-21 16:11:44,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:44,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522564971] [2024-06-21 16:11:44,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:44,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:44,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:45,552 INFO 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 16:11:45,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:45,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522564971] [2024-06-21 16:11:45,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522564971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:45,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:45,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:11:45,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370997679] [2024-06-21 16:11:45,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:45,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:11:45,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:45,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:11:45,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:11:45,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 16:11:45,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 366 transitions, 4037 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 16:11:45,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:45,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 16:11:45,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:47,139 INFO L124 PetriNetUnfolderBase]: 5250/7960 cut-off events. [2024-06-21 16:11:47,139 INFO L125 PetriNetUnfolderBase]: For 1341463/1341466 co-relation queries the response was YES. [2024-06-21 16:11:47,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74341 conditions, 7960 events. 5250/7960 cut-off events. For 1341463/1341466 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 44909 event pairs, 1316 based on Foata normal form. 3/7960 useless extension candidates. Maximal degree in co-relation 74200. Up to 7916 conditions per place. [2024-06-21 16:11:47,246 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 347 selfloop transitions, 27 changer transitions 0/377 dead transitions. [2024-06-21 16:11:47,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 377 transitions, 4989 flow [2024-06-21 16:11:47,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:11:47,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:11:47,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-21 16:11:47,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3754152823920266 [2024-06-21 16:11:47,247 INFO L175 Difference]: Start difference. First operand has 296 places, 366 transitions, 4037 flow. Second operand 7 states and 113 transitions. [2024-06-21 16:11:47,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 377 transitions, 4989 flow [2024-06-21 16:11:48,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 377 transitions, 4889 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-21 16:11:48,772 INFO L231 Difference]: Finished difference. Result has 298 places, 366 transitions, 3997 flow [2024-06-21 16:11:48,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3937, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3997, PETRI_PLACES=298, PETRI_TRANSITIONS=366} [2024-06-21 16:11:48,773 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 254 predicate places. [2024-06-21 16:11:48,773 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 366 transitions, 3997 flow [2024-06-21 16:11:48,773 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 16:11:48,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:48,773 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 16:11:48,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 16:11:48,773 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 16:11:48,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:48,774 INFO L85 PathProgramCache]: Analyzing trace with hash -130421360, now seen corresponding path program 6 times [2024-06-21 16:11:48,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:48,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279282893] [2024-06-21 16:11:48,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:48,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:48,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:49,377 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 16:11:49,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:49,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279282893] [2024-06-21 16:11:49,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279282893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:49,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:49,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:11:49,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703662705] [2024-06-21 16:11:49,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:49,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:11:49,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:49,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:11:49,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:11:49,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 16:11:49,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 366 transitions, 3997 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 16:11:49,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:49,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 16:11:49,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:50,979 INFO L124 PetriNetUnfolderBase]: 5247/7956 cut-off events. [2024-06-21 16:11:50,979 INFO L125 PetriNetUnfolderBase]: For 1365116/1365119 co-relation queries the response was YES. [2024-06-21 16:11:51,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74480 conditions, 7956 events. 5247/7956 cut-off events. For 1365116/1365119 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 44932 event pairs, 1304 based on Foata normal form. 3/7956 useless extension candidates. Maximal degree in co-relation 74338. Up to 7922 conditions per place. [2024-06-21 16:11:51,091 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 354 selfloop transitions, 19 changer transitions 0/376 dead transitions. [2024-06-21 16:11:51,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 376 transitions, 4767 flow [2024-06-21 16:11:51,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:11:51,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:11:51,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-21 16:11:51,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3687707641196013 [2024-06-21 16:11:51,112 INFO L175 Difference]: Start difference. First operand has 298 places, 366 transitions, 3997 flow. Second operand 7 states and 111 transitions. [2024-06-21 16:11:51,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 376 transitions, 4767 flow [2024-06-21 16:11:52,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 376 transitions, 4645 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-21 16:11:52,837 INFO L231 Difference]: Finished difference. Result has 299 places, 366 transitions, 3919 flow [2024-06-21 16:11:52,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3875, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3919, PETRI_PLACES=299, PETRI_TRANSITIONS=366} [2024-06-21 16:11:52,838 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 255 predicate places. [2024-06-21 16:11:52,838 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 366 transitions, 3919 flow [2024-06-21 16:11:52,838 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 16:11:52,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:52,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:11:52,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 16:11:52,839 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:11:52,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:52,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1316215363, now seen corresponding path program 6 times [2024-06-21 16:11:52,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:52,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665013152] [2024-06-21 16:11:52,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:52,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:52,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:54,143 INFO 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 16:11:54,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:54,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665013152] [2024-06-21 16:11:54,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665013152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:54,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:54,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:11:54,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931890745] [2024-06-21 16:11:54,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:54,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:11:54,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:54,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:11:54,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:11:54,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:11:54,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 366 transitions, 3919 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 16:11:54,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:54,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:11:54,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:56,308 INFO L124 PetriNetUnfolderBase]: 5166/7890 cut-off events. [2024-06-21 16:11:56,308 INFO L125 PetriNetUnfolderBase]: For 1415519/1415553 co-relation queries the response was YES. [2024-06-21 16:11:56,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74660 conditions, 7890 events. 5166/7890 cut-off events. For 1415519/1415553 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 45226 event pairs, 1241 based on Foata normal form. 4/7875 useless extension candidates. Maximal degree in co-relation 74517. Up to 7566 conditions per place. [2024-06-21 16:11:56,410 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 349 selfloop transitions, 34 changer transitions 0/406 dead transitions. [2024-06-21 16:11:56,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 406 transitions, 4902 flow [2024-06-21 16:11:56,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:11:56,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:11:56,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-21 16:11:56,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-21 16:11:56,412 INFO L175 Difference]: Start difference. First operand has 299 places, 366 transitions, 3919 flow. Second operand 10 states and 180 transitions. [2024-06-21 16:11:56,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 406 transitions, 4902 flow [2024-06-21 16:11:58,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 406 transitions, 4838 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 16:11:58,602 INFO L231 Difference]: Finished difference. Result has 303 places, 371 transitions, 4069 flow [2024-06-21 16:11:58,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3855, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4069, PETRI_PLACES=303, PETRI_TRANSITIONS=371} [2024-06-21 16:11:58,603 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 259 predicate places. [2024-06-21 16:11:58,603 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 371 transitions, 4069 flow [2024-06-21 16:11:58,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 16:11:58,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:58,603 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 16:11:58,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 16:11:58,603 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:11:58,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:58,604 INFO L85 PathProgramCache]: Analyzing trace with hash -410250439, now seen corresponding path program 7 times [2024-06-21 16:11:58,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:58,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856921702] [2024-06-21 16:11:58,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:58,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:58,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:59,927 INFO 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 16:11:59,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:59,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856921702] [2024-06-21 16:11:59,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856921702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:59,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:59,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:11:59,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452875287] [2024-06-21 16:11:59,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:59,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:11:59,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:59,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:11:59,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:12:00,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:12:00,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 371 transitions, 4069 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 16:12:00,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:00,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:12:00,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:01,799 INFO L124 PetriNetUnfolderBase]: 5185/7921 cut-off events. [2024-06-21 16:12:01,799 INFO L125 PetriNetUnfolderBase]: For 1450259/1450279 co-relation queries the response was YES. [2024-06-21 16:12:01,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75676 conditions, 7921 events. 5185/7921 cut-off events. For 1450259/1450279 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 45421 event pairs, 1265 based on Foata normal form. 4/7911 useless extension candidates. Maximal degree in co-relation 75531. Up to 7597 conditions per place. [2024-06-21 16:12:01,910 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 352 selfloop transitions, 33 changer transitions 0/408 dead transitions. [2024-06-21 16:12:01,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 408 transitions, 5033 flow [2024-06-21 16:12:01,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:12:01,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:12:01,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-21 16:12:01,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41627906976744183 [2024-06-21 16:12:01,911 INFO L175 Difference]: Start difference. First operand has 303 places, 371 transitions, 4069 flow. Second operand 10 states and 179 transitions. [2024-06-21 16:12:01,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 408 transitions, 5033 flow [2024-06-21 16:12:04,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 408 transitions, 4876 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-21 16:12:04,057 INFO L231 Difference]: Finished difference. Result has 306 places, 373 transitions, 4093 flow [2024-06-21 16:12:04,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3912, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4093, PETRI_PLACES=306, PETRI_TRANSITIONS=373} [2024-06-21 16:12:04,058 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 262 predicate places. [2024-06-21 16:12:04,058 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 373 transitions, 4093 flow [2024-06-21 16:12:04,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 16:12:04,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:04,058 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 16:12:04,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 16:12:04,058 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:12:04,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:04,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1266185189, now seen corresponding path program 8 times [2024-06-21 16:12:04,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:04,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662429900] [2024-06-21 16:12:04,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:04,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:04,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:05,192 INFO 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 16:12:05,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:05,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662429900] [2024-06-21 16:12:05,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662429900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:05,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:05,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:12:05,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073561562] [2024-06-21 16:12:05,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:05,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:12:05,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:05,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:12:05,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:12:05,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:12:05,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 373 transitions, 4093 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:05,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:05,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:12:05,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:07,164 INFO L124 PetriNetUnfolderBase]: 5224/7980 cut-off events. [2024-06-21 16:12:07,164 INFO L125 PetriNetUnfolderBase]: For 1482645/1482665 co-relation queries the response was YES. [2024-06-21 16:12:07,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76476 conditions, 7980 events. 5224/7980 cut-off events. For 1482645/1482665 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 45796 event pairs, 1236 based on Foata normal form. 4/7970 useless extension candidates. Maximal degree in co-relation 76330. Up to 7642 conditions per place. [2024-06-21 16:12:07,297 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 358 selfloop transitions, 33 changer transitions 0/414 dead transitions. [2024-06-21 16:12:07,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 414 transitions, 5122 flow [2024-06-21 16:12:07,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:12:07,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:12:07,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-21 16:12:07,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41627906976744183 [2024-06-21 16:12:07,299 INFO L175 Difference]: Start difference. First operand has 306 places, 373 transitions, 4093 flow. Second operand 10 states and 179 transitions. [2024-06-21 16:12:07,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 414 transitions, 5122 flow [2024-06-21 16:12:09,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 414 transitions, 4959 flow, removed 50 selfloop flow, removed 8 redundant places. [2024-06-21 16:12:09,956 INFO L231 Difference]: Finished difference. Result has 309 places, 379 transitions, 4174 flow [2024-06-21 16:12:09,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3930, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4174, PETRI_PLACES=309, PETRI_TRANSITIONS=379} [2024-06-21 16:12:09,956 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 265 predicate places. [2024-06-21 16:12:09,956 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 379 transitions, 4174 flow [2024-06-21 16:12:09,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:09,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:09,957 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 16:12:09,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 16:12:09,957 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:12:09,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:09,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1265969708, now seen corresponding path program 11 times [2024-06-21 16:12:09,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:09,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817777226] [2024-06-21 16:12:09,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:09,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:09,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:11,103 INFO 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 16:12:11,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:11,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817777226] [2024-06-21 16:12:11,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817777226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:11,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:11,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:12:11,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367601165] [2024-06-21 16:12:11,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:11,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:12:11,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:11,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:12:11,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:12:11,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:12:11,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 379 transitions, 4174 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 16:12:11,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:11,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:12:11,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:12,834 INFO L124 PetriNetUnfolderBase]: 4816/7528 cut-off events. [2024-06-21 16:12:12,834 INFO L125 PetriNetUnfolderBase]: For 1559083/1559123 co-relation queries the response was YES. [2024-06-21 16:12:12,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73715 conditions, 7528 events. 4816/7528 cut-off events. For 1559083/1559123 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 45388 event pairs, 1087 based on Foata normal form. 24/7523 useless extension candidates. Maximal degree in co-relation 73567. Up to 6830 conditions per place. [2024-06-21 16:12:12,945 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 350 selfloop transitions, 36 changer transitions 0/421 dead transitions. [2024-06-21 16:12:12,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 421 transitions, 5189 flow [2024-06-21 16:12:12,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:12:12,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:12:12,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-21 16:12:12,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 16:12:12,947 INFO L175 Difference]: Start difference. First operand has 309 places, 379 transitions, 4174 flow. Second operand 10 states and 190 transitions. [2024-06-21 16:12:12,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 421 transitions, 5189 flow [2024-06-21 16:12:14,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 421 transitions, 5004 flow, removed 62 selfloop flow, removed 7 redundant places. [2024-06-21 16:12:14,581 INFO L231 Difference]: Finished difference. Result has 312 places, 380 transitions, 4159 flow [2024-06-21 16:12:14,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3989, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4159, PETRI_PLACES=312, PETRI_TRANSITIONS=380} [2024-06-21 16:12:14,581 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 268 predicate places. [2024-06-21 16:12:14,581 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 380 transitions, 4159 flow [2024-06-21 16:12:14,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 16:12:14,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:14,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:12:14,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 16:12:14,582 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:12:14,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:14,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1042281400, now seen corresponding path program 12 times [2024-06-21 16:12:14,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:14,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501290264] [2024-06-21 16:12:14,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:14,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:14,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:16,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:12:16,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:16,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501290264] [2024-06-21 16:12:16,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501290264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:16,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:16,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:12:16,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241470824] [2024-06-21 16:12:16,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:16,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:12:16,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:16,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:12:16,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:12:16,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:12:16,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 380 transitions, 4159 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 16:12:16,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:16,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:12:16,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:18,135 INFO L124 PetriNetUnfolderBase]: 5034/7885 cut-off events. [2024-06-21 16:12:18,136 INFO L125 PetriNetUnfolderBase]: For 1685386/1685426 co-relation queries the response was YES. [2024-06-21 16:12:18,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79444 conditions, 7885 events. 5034/7885 cut-off events. For 1685386/1685426 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 48086 event pairs, 1075 based on Foata normal form. 16/7872 useless extension candidates. Maximal degree in co-relation 79295. Up to 6480 conditions per place. [2024-06-21 16:12:18,250 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 320 selfloop transitions, 78 changer transitions 0/433 dead transitions. [2024-06-21 16:12:18,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 433 transitions, 5645 flow [2024-06-21 16:12:18,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:12:18,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:12:18,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 217 transitions. [2024-06-21 16:12:18,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4587737843551797 [2024-06-21 16:12:18,252 INFO L175 Difference]: Start difference. First operand has 312 places, 380 transitions, 4159 flow. Second operand 11 states and 217 transitions. [2024-06-21 16:12:18,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 433 transitions, 5645 flow [2024-06-21 16:12:20,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 433 transitions, 5513 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-21 16:12:20,246 INFO L231 Difference]: Finished difference. Result has 315 places, 382 transitions, 4371 flow [2024-06-21 16:12:20,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4027, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4371, PETRI_PLACES=315, PETRI_TRANSITIONS=382} [2024-06-21 16:12:20,246 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 271 predicate places. [2024-06-21 16:12:20,246 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 382 transitions, 4371 flow [2024-06-21 16:12:20,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 16:12:20,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:20,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:12:20,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 16:12:20,247 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:12:20,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:20,247 INFO L85 PathProgramCache]: Analyzing trace with hash 310605513, now seen corresponding path program 9 times [2024-06-21 16:12:20,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:20,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731384449] [2024-06-21 16:12:20,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:20,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:20,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:21,387 INFO 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 16:12:21,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:21,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731384449] [2024-06-21 16:12:21,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731384449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:21,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:21,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:12:21,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43838435] [2024-06-21 16:12:21,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:21,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:12:21,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:21,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:12:21,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:12:21,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:12:21,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 382 transitions, 4371 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 16:12:21,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:21,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:12:21,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:23,409 INFO L124 PetriNetUnfolderBase]: 5536/8492 cut-off events. [2024-06-21 16:12:23,410 INFO L125 PetriNetUnfolderBase]: For 1692795/1692815 co-relation queries the response was YES. [2024-06-21 16:12:23,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84361 conditions, 8492 events. 5536/8492 cut-off events. For 1692795/1692815 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 49793 event pairs, 1345 based on Foata normal form. 4/8482 useless extension candidates. Maximal degree in co-relation 84211. Up to 8204 conditions per place. [2024-06-21 16:12:23,536 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 371 selfloop transitions, 27 changer transitions 0/421 dead transitions. [2024-06-21 16:12:23,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 421 transitions, 5401 flow [2024-06-21 16:12:23,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:12:23,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:12:23,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-21 16:12:23,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.413953488372093 [2024-06-21 16:12:23,537 INFO L175 Difference]: Start difference. First operand has 315 places, 382 transitions, 4371 flow. Second operand 10 states and 178 transitions. [2024-06-21 16:12:23,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 421 transitions, 5401 flow [2024-06-21 16:12:25,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 421 transitions, 5083 flow, removed 68 selfloop flow, removed 7 redundant places. [2024-06-21 16:12:25,620 INFO L231 Difference]: Finished difference. Result has 319 places, 386 transitions, 4268 flow [2024-06-21 16:12:25,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4057, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4268, PETRI_PLACES=319, PETRI_TRANSITIONS=386} [2024-06-21 16:12:25,620 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 275 predicate places. [2024-06-21 16:12:25,620 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 386 transitions, 4268 flow [2024-06-21 16:12:25,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 16:12:25,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:25,621 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 16:12:25,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 16:12:25,621 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:12:25,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:25,622 INFO L85 PathProgramCache]: Analyzing trace with hash 848656589, now seen corresponding path program 10 times [2024-06-21 16:12:25,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:25,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34406886] [2024-06-21 16:12:25,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:25,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:25,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:26,828 INFO 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 16:12:26,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:26,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34406886] [2024-06-21 16:12:26,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34406886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:26,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:26,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:12:26,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214422179] [2024-06-21 16:12:26,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:26,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:12:26,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:26,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:12:26,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:12:27,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:12:27,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 386 transitions, 4268 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 16:12:27,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:27,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:12:27,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:28,975 INFO L124 PetriNetUnfolderBase]: 5553/8519 cut-off events. [2024-06-21 16:12:28,975 INFO L125 PetriNetUnfolderBase]: For 1706230/1706250 co-relation queries the response was YES. [2024-06-21 16:12:29,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83801 conditions, 8519 events. 5553/8519 cut-off events. For 1706230/1706250 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 49980 event pairs, 1340 based on Foata normal form. 4/8509 useless extension candidates. Maximal degree in co-relation 83649. Up to 8231 conditions per place. [2024-06-21 16:12:29,084 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 374 selfloop transitions, 26 changer transitions 0/423 dead transitions. [2024-06-21 16:12:29,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 423 transitions, 5278 flow [2024-06-21 16:12:29,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:12:29,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:12:29,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-21 16:12:29,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4116279069767442 [2024-06-21 16:12:29,086 INFO L175 Difference]: Start difference. First operand has 319 places, 386 transitions, 4268 flow. Second operand 10 states and 177 transitions. [2024-06-21 16:12:29,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 423 transitions, 5278 flow [2024-06-21 16:12:30,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 423 transitions, 5064 flow, removed 60 selfloop flow, removed 8 redundant places. [2024-06-21 16:12:30,831 INFO L231 Difference]: Finished difference. Result has 321 places, 388 transitions, 4237 flow [2024-06-21 16:12:30,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4054, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4237, PETRI_PLACES=321, PETRI_TRANSITIONS=388} [2024-06-21 16:12:30,832 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 277 predicate places. [2024-06-21 16:12:30,832 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 388 transitions, 4237 flow [2024-06-21 16:12:30,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 16:12:30,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:30,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:12:30,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 16:12:30,833 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:12:30,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:30,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1521496407, now seen corresponding path program 11 times [2024-06-21 16:12:30,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:30,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529873955] [2024-06-21 16:12:30,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:30,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:30,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:31,936 INFO 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 16:12:31,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:31,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529873955] [2024-06-21 16:12:31,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529873955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:31,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:31,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:12:31,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058004285] [2024-06-21 16:12:31,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:31,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:12:31,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:31,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:12:31,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:12:32,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:12:32,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 388 transitions, 4237 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:32,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:32,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:12:32,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:34,027 INFO L124 PetriNetUnfolderBase]: 5570/8546 cut-off events. [2024-06-21 16:12:34,028 INFO L125 PetriNetUnfolderBase]: For 1741426/1741446 co-relation queries the response was YES. [2024-06-21 16:12:34,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83946 conditions, 8546 events. 5570/8546 cut-off events. For 1741426/1741446 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 50195 event pairs, 1360 based on Foata normal form. 4/8536 useless extension candidates. Maximal degree in co-relation 83794. Up to 8285 conditions per place. [2024-06-21 16:12:34,154 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 379 selfloop transitions, 22 changer transitions 0/424 dead transitions. [2024-06-21 16:12:34,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 424 transitions, 5251 flow [2024-06-21 16:12:34,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:12:34,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:12:34,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-21 16:12:34,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-21 16:12:34,156 INFO L175 Difference]: Start difference. First operand has 321 places, 388 transitions, 4237 flow. Second operand 10 states and 175 transitions. [2024-06-21 16:12:34,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 424 transitions, 5251 flow [2024-06-21 16:12:36,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 424 transitions, 5086 flow, removed 58 selfloop flow, removed 8 redundant places. [2024-06-21 16:12:36,807 INFO L231 Difference]: Finished difference. Result has 323 places, 390 transitions, 4251 flow [2024-06-21 16:12:36,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4072, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4251, PETRI_PLACES=323, PETRI_TRANSITIONS=390} [2024-06-21 16:12:36,808 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 279 predicate places. [2024-06-21 16:12:36,808 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 390 transitions, 4251 flow [2024-06-21 16:12:36,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:36,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:36,808 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 16:12:36,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 16:12:36,808 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:12:36,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:36,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1042277680, now seen corresponding path program 13 times [2024-06-21 16:12:36,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:36,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460674275] [2024-06-21 16:12:36,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:36,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:36,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:38,330 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 16:12:38,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:38,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460674275] [2024-06-21 16:12:38,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460674275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:38,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:38,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:12:38,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63323987] [2024-06-21 16:12:38,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:38,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:12:38,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:38,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:12:38,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:12:38,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:12:38,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 390 transitions, 4251 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 16:12:38,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:38,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:12:38,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:40,401 INFO L124 PetriNetUnfolderBase]: 5153/8079 cut-off events. [2024-06-21 16:12:40,401 INFO L125 PetriNetUnfolderBase]: For 1836493/1836539 co-relation queries the response was YES. [2024-06-21 16:12:40,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80977 conditions, 8079 events. 5153/8079 cut-off events. For 1836493/1836539 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 49617 event pairs, 1124 based on Foata normal form. 24/8074 useless extension candidates. Maximal degree in co-relation 80824. Up to 7097 conditions per place. [2024-06-21 16:12:40,527 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 329 selfloop transitions, 79 changer transitions 0/443 dead transitions. [2024-06-21 16:12:40,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 443 transitions, 5330 flow [2024-06-21 16:12:40,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:12:40,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:12:40,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 231 transitions. [2024-06-21 16:12:40,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-21 16:12:40,528 INFO L175 Difference]: Start difference. First operand has 323 places, 390 transitions, 4251 flow. Second operand 12 states and 231 transitions. [2024-06-21 16:12:40,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 443 transitions, 5330 flow [2024-06-21 16:12:42,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 443 transitions, 5173 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-06-21 16:12:42,478 INFO L231 Difference]: Finished difference. Result has 328 places, 392 transitions, 4353 flow [2024-06-21 16:12:42,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4094, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4353, PETRI_PLACES=328, PETRI_TRANSITIONS=392} [2024-06-21 16:12:42,482 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 284 predicate places. [2024-06-21 16:12:42,483 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 392 transitions, 4353 flow [2024-06-21 16:12:42,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 16:12:42,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:42,483 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 16:12:42,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 16:12:42,483 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:12:42,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:42,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1036555669, now seen corresponding path program 12 times [2024-06-21 16:12:42,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:42,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646112468] [2024-06-21 16:12:42,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:42,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:42,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:43,557 INFO 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 16:12:43,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:43,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646112468] [2024-06-21 16:12:43,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646112468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:43,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:43,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:12:43,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449963367] [2024-06-21 16:12:43,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:43,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:12:43,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:43,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:12:43,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:12:43,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:12:43,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 392 transitions, 4353 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:43,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:43,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:12:43,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:45,475 INFO L124 PetriNetUnfolderBase]: 5696/8752 cut-off events. [2024-06-21 16:12:45,475 INFO L125 PetriNetUnfolderBase]: For 1831446/1831466 co-relation queries the response was YES. [2024-06-21 16:12:45,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86873 conditions, 8752 events. 5696/8752 cut-off events. For 1831446/1831466 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 51827 event pairs, 1336 based on Foata normal form. 4/8742 useless extension candidates. Maximal degree in co-relation 86719. Up to 8292 conditions per place. [2024-06-21 16:12:45,607 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 355 selfloop transitions, 55 changer transitions 0/433 dead transitions. [2024-06-21 16:12:45,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 433 transitions, 5449 flow [2024-06-21 16:12:45,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:12:45,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:12:45,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-21 16:12:45,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4232558139534884 [2024-06-21 16:12:45,609 INFO L175 Difference]: Start difference. First operand has 328 places, 392 transitions, 4353 flow. Second operand 10 states and 182 transitions. [2024-06-21 16:12:45,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 433 transitions, 5449 flow [2024-06-21 16:12:48,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 433 transitions, 5224 flow, removed 32 selfloop flow, removed 9 redundant places. [2024-06-21 16:12:48,073 INFO L231 Difference]: Finished difference. Result has 330 places, 397 transitions, 4421 flow [2024-06-21 16:12:48,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4132, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4421, PETRI_PLACES=330, PETRI_TRANSITIONS=397} [2024-06-21 16:12:48,073 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 286 predicate places. [2024-06-21 16:12:48,074 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 397 transitions, 4421 flow [2024-06-21 16:12:48,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:48,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:48,074 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 16:12:48,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 16:12:48,074 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:12:48,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:48,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1521765177, now seen corresponding path program 13 times [2024-06-21 16:12:48,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:48,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240833960] [2024-06-21 16:12:48,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:48,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:48,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:49,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:12:49,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:49,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240833960] [2024-06-21 16:12:49,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240833960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:49,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:49,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:12:49,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216156770] [2024-06-21 16:12:49,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:49,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:12:49,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:49,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:12:49,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:12:49,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:12:49,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 397 transitions, 4421 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 16:12:49,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:49,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:12:49,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:51,357 INFO L124 PetriNetUnfolderBase]: 5713/8779 cut-off events. [2024-06-21 16:12:51,357 INFO L125 PetriNetUnfolderBase]: For 1857415/1857435 co-relation queries the response was YES. [2024-06-21 16:12:51,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87176 conditions, 8779 events. 5713/8779 cut-off events. For 1857415/1857435 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 52042 event pairs, 1366 based on Foata normal form. 4/8769 useless extension candidates. Maximal degree in co-relation 87020. Up to 8518 conditions per place. [2024-06-21 16:12:51,475 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 389 selfloop transitions, 21 changer transitions 0/433 dead transitions. [2024-06-21 16:12:51,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 433 transitions, 5459 flow [2024-06-21 16:12:51,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:12:51,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:12:51,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-21 16:12:51,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4046511627906977 [2024-06-21 16:12:51,476 INFO L175 Difference]: Start difference. First operand has 330 places, 397 transitions, 4421 flow. Second operand 10 states and 174 transitions. [2024-06-21 16:12:51,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 433 transitions, 5459 flow [2024-06-21 16:12:53,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 433 transitions, 5214 flow, removed 70 selfloop flow, removed 7 redundant places. [2024-06-21 16:12:53,635 INFO L231 Difference]: Finished difference. Result has 333 places, 399 transitions, 4361 flow [2024-06-21 16:12:53,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4176, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4361, PETRI_PLACES=333, PETRI_TRANSITIONS=399} [2024-06-21 16:12:53,635 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 289 predicate places. [2024-06-21 16:12:53,636 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 399 transitions, 4361 flow [2024-06-21 16:12:53,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 16:12:53,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:53,636 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 16:12:53,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 16:12:53,636 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:12:53,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:53,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1410507897, now seen corresponding path program 14 times [2024-06-21 16:12:53,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:53,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676585253] [2024-06-21 16:12:53,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:53,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:53,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:54,739 INFO 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 16:12:54,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:54,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676585253] [2024-06-21 16:12:54,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676585253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:54,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:54,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:12:54,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701938932] [2024-06-21 16:12:54,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:54,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:12:54,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:54,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:12:54,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:12:54,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:12:54,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 399 transitions, 4361 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 16:12:54,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:54,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:12:54,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:57,030 INFO L124 PetriNetUnfolderBase]: 5730/8806 cut-off events. [2024-06-21 16:12:57,030 INFO L125 PetriNetUnfolderBase]: For 1894979/1894999 co-relation queries the response was YES. [2024-06-21 16:12:57,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87590 conditions, 8806 events. 5730/8806 cut-off events. For 1894979/1894999 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 52234 event pairs, 1371 based on Foata normal form. 4/8796 useless extension candidates. Maximal degree in co-relation 87433. Up to 8500 conditions per place. [2024-06-21 16:12:57,156 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 380 selfloop transitions, 32 changer transitions 0/435 dead transitions. [2024-06-21 16:12:57,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 435 transitions, 5409 flow [2024-06-21 16:12:57,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:12:57,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:12:57,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-21 16:12:57,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40930232558139534 [2024-06-21 16:12:57,158 INFO L175 Difference]: Start difference. First operand has 333 places, 399 transitions, 4361 flow. Second operand 10 states and 176 transitions. [2024-06-21 16:12:57,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 435 transitions, 5409 flow [2024-06-21 16:12:59,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 435 transitions, 5242 flow, removed 64 selfloop flow, removed 8 redundant places. [2024-06-21 16:12:59,854 INFO L231 Difference]: Finished difference. Result has 335 places, 401 transitions, 4408 flow [2024-06-21 16:12:59,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4194, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4408, PETRI_PLACES=335, PETRI_TRANSITIONS=401} [2024-06-21 16:12:59,855 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 291 predicate places. [2024-06-21 16:12:59,855 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 401 transitions, 4408 flow [2024-06-21 16:12:59,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 16:12:59,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:59,855 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 16:12:59,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 16:12:59,855 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:12:59,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:59,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1410507618, now seen corresponding path program 1 times [2024-06-21 16:12:59,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:59,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721195669] [2024-06-21 16:12:59,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:59,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:59,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:13:00,882 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 16:13:00,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:13:00,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721195669] [2024-06-21 16:13:00,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721195669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:13:00,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:13:00,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:13:00,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874890059] [2024-06-21 16:13:00,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:13:00,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:13:00,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:13:00,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:13:00,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:13:01,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:13:01,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 401 transitions, 4408 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 16:13:01,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:13:01,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:13:01,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:13:03,025 INFO L124 PetriNetUnfolderBase]: 5755/8847 cut-off events. [2024-06-21 16:13:03,025 INFO L125 PetriNetUnfolderBase]: For 1900717/1900719 co-relation queries the response was YES. [2024-06-21 16:13:03,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87401 conditions, 8847 events. 5755/8847 cut-off events. For 1900717/1900719 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 52516 event pairs, 1359 based on Foata normal form. 4/8845 useless extension candidates. Maximal degree in co-relation 87243. Up to 8509 conditions per place. [2024-06-21 16:13:03,157 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 386 selfloop transitions, 36 changer transitions 0/445 dead transitions. [2024-06-21 16:13:03,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 445 transitions, 5544 flow [2024-06-21 16:13:03,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:13:03,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:13:03,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-21 16:13:03,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.413953488372093 [2024-06-21 16:13:03,158 INFO L175 Difference]: Start difference. First operand has 335 places, 401 transitions, 4408 flow. Second operand 10 states and 178 transitions. [2024-06-21 16:13:03,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 445 transitions, 5544 flow [2024-06-21 16:13:05,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 445 transitions, 5348 flow, removed 69 selfloop flow, removed 8 redundant places. [2024-06-21 16:13:05,873 INFO L231 Difference]: Finished difference. Result has 337 places, 409 transitions, 4495 flow [2024-06-21 16:13:05,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4214, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4495, PETRI_PLACES=337, PETRI_TRANSITIONS=409} [2024-06-21 16:13:05,874 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 293 predicate places. [2024-06-21 16:13:05,874 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 409 transitions, 4495 flow [2024-06-21 16:13:05,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 16:13:05,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:13:05,875 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 16:13:05,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 16:13:05,875 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:13:05,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:13:05,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1835464407, now seen corresponding path program 15 times [2024-06-21 16:13:05,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:13:05,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156228709] [2024-06-21 16:13:05,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:13:05,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:13:05,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:13:06,948 INFO 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 16:13:06,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:13:06,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156228709] [2024-06-21 16:13:06,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156228709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:13:06,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:13:06,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:13:06,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22553992] [2024-06-21 16:13:06,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:13:06,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:13:06,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:13:06,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:13:06,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:13:07,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:13:07,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 409 transitions, 4495 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 16:13:07,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:13:07,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:13:07,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:13:09,138 INFO L124 PetriNetUnfolderBase]: 5772/8874 cut-off events. [2024-06-21 16:13:09,138 INFO L125 PetriNetUnfolderBase]: For 1901762/1901764 co-relation queries the response was YES. [2024-06-21 16:13:09,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88002 conditions, 8874 events. 5772/8874 cut-off events. For 1901762/1901764 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 52695 event pairs, 1364 based on Foata normal form. 4/8872 useless extension candidates. Maximal degree in co-relation 87843. Up to 8550 conditions per place. [2024-06-21 16:13:09,276 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 392 selfloop transitions, 30 changer transitions 0/445 dead transitions. [2024-06-21 16:13:09,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 445 transitions, 5563 flow [2024-06-21 16:13:09,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:13:09,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:13:09,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-21 16:13:09,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-21 16:13:09,278 INFO L175 Difference]: Start difference. First operand has 337 places, 409 transitions, 4495 flow. Second operand 10 states and 175 transitions. [2024-06-21 16:13:09,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 445 transitions, 5563 flow [2024-06-21 16:13:11,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 445 transitions, 5387 flow, removed 57 selfloop flow, removed 8 redundant places. [2024-06-21 16:13:11,733 INFO L231 Difference]: Finished difference. Result has 339 places, 411 transitions, 4531 flow [2024-06-21 16:13:11,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4319, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4531, PETRI_PLACES=339, PETRI_TRANSITIONS=411} [2024-06-21 16:13:11,734 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 295 predicate places. [2024-06-21 16:13:11,734 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 411 transitions, 4531 flow [2024-06-21 16:13:11,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 16:13:11,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:13:11,734 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 16:13:11,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 16:13:11,734 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:13:11,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:13:11,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1421559087, now seen corresponding path program 16 times [2024-06-21 16:13:11,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:13:11,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665007922] [2024-06-21 16:13:11,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:13:11,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:13:11,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:13:12,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:13:12,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:13:12,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665007922] [2024-06-21 16:13:12,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665007922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:13:12,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:13:12,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:13:12,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157321415] [2024-06-21 16:13:12,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:13:12,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:13:12,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:13:12,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:13:12,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:13:12,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:13:12,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 411 transitions, 4531 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 16:13:12,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:13:12,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:13:12,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:13:14,934 INFO L124 PetriNetUnfolderBase]: 5789/8901 cut-off events. [2024-06-21 16:13:14,934 INFO L125 PetriNetUnfolderBase]: For 1941701/1941703 co-relation queries the response was YES. [2024-06-21 16:13:15,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88709 conditions, 8901 events. 5789/8901 cut-off events. For 1941701/1941703 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 52898 event pairs, 1353 based on Foata normal form. 4/8899 useless extension candidates. Maximal degree in co-relation 88549. Up to 8622 conditions per place. [2024-06-21 16:13:15,085 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 402 selfloop transitions, 22 changer transitions 0/447 dead transitions. [2024-06-21 16:13:15,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 447 transitions, 5605 flow [2024-06-21 16:13:15,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:13:15,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:13:15,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-21 16:13:15,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4046511627906977 [2024-06-21 16:13:15,086 INFO L175 Difference]: Start difference. First operand has 339 places, 411 transitions, 4531 flow. Second operand 10 states and 174 transitions. [2024-06-21 16:13:15,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 447 transitions, 5605 flow [2024-06-21 16:13:18,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 447 transitions, 5409 flow, removed 71 selfloop flow, removed 8 redundant places. [2024-06-21 16:13:18,557 INFO L231 Difference]: Finished difference. Result has 341 places, 413 transitions, 4532 flow [2024-06-21 16:13:18,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4339, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4532, PETRI_PLACES=341, PETRI_TRANSITIONS=413} [2024-06-21 16:13:18,557 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 297 predicate places. [2024-06-21 16:13:18,557 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 413 transitions, 4532 flow [2024-06-21 16:13:18,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 16:13:18,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:13:18,558 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 16:13:18,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 16:13:18,558 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:13:18,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:13:18,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1287498310, now seen corresponding path program 14 times [2024-06-21 16:13:18,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:13:18,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840535888] [2024-06-21 16:13:18,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:13:18,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:13:18,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:13:19,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:13:19,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:13:19,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840535888] [2024-06-21 16:13:19,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840535888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:13:19,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:13:19,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:13:19,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110514477] [2024-06-21 16:13:19,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:13:19,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:13:19,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:13:19,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:13:19,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:13:19,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:13:19,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 413 transitions, 4532 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 16:13:19,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:13:19,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:13:19,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:13:21,936 INFO L124 PetriNetUnfolderBase]: 5403/8480 cut-off events. [2024-06-21 16:13:21,937 INFO L125 PetriNetUnfolderBase]: For 2022703/2022737 co-relation queries the response was YES. [2024-06-21 16:13:22,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85187 conditions, 8480 events. 5403/8480 cut-off events. For 2022703/2022737 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 52622 event pairs, 1157 based on Foata normal form. 28/8487 useless extension candidates. Maximal degree in co-relation 85026. Up to 7422 conditions per place. [2024-06-21 16:13:22,057 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 344 selfloop transitions, 76 changer transitions 0/456 dead transitions. [2024-06-21 16:13:22,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 456 transitions, 5613 flow [2024-06-21 16:13:22,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:13:22,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:13:22,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-21 16:13:22,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4604651162790698 [2024-06-21 16:13:22,059 INFO L175 Difference]: Start difference. First operand has 341 places, 413 transitions, 4532 flow. Second operand 10 states and 198 transitions. [2024-06-21 16:13:22,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 456 transitions, 5613 flow [2024-06-21 16:13:24,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 456 transitions, 5438 flow, removed 67 selfloop flow, removed 8 redundant places. [2024-06-21 16:13:24,710 INFO L231 Difference]: Finished difference. Result has 343 places, 414 transitions, 4603 flow [2024-06-21 16:13:24,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4357, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4603, PETRI_PLACES=343, PETRI_TRANSITIONS=414} [2024-06-21 16:13:24,711 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 299 predicate places. [2024-06-21 16:13:24,711 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 414 transitions, 4603 flow [2024-06-21 16:13:24,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 16:13:24,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:13:24,711 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 16:13:24,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 16:13:24,711 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:13:24,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:13:24,712 INFO L85 PathProgramCache]: Analyzing trace with hash -417669049, now seen corresponding path program 17 times [2024-06-21 16:13:24,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:13:24,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254535788] [2024-06-21 16:13:24,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:13:24,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:13:24,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:13:25,835 INFO 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 16:13:25,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:13:25,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254535788] [2024-06-21 16:13:25,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254535788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:13:25,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:13:25,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:13:25,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540192540] [2024-06-21 16:13:25,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:13:25,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:13:25,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:13:25,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:13:25,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:13:25,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:13:25,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 414 transitions, 4603 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:25,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:13:25,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:13:25,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:13:28,133 INFO L124 PetriNetUnfolderBase]: 5890/9068 cut-off events. [2024-06-21 16:13:28,133 INFO L125 PetriNetUnfolderBase]: For 1972771/1972773 co-relation queries the response was YES. [2024-06-21 16:13:28,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89987 conditions, 9068 events. 5890/9068 cut-off events. For 1972771/1972773 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 54300 event pairs, 1367 based on Foata normal form. 4/9066 useless extension candidates. Maximal degree in co-relation 89825. Up to 8713 conditions per place. [2024-06-21 16:13:28,288 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 393 selfloop transitions, 39 changer transitions 0/455 dead transitions. [2024-06-21 16:13:28,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 455 transitions, 5747 flow [2024-06-21 16:13:28,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:13:28,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:13:28,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-21 16:13:28,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255813953488372 [2024-06-21 16:13:28,289 INFO L175 Difference]: Start difference. First operand has 343 places, 414 transitions, 4603 flow. Second operand 10 states and 183 transitions. [2024-06-21 16:13:28,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 455 transitions, 5747 flow [2024-06-21 16:13:31,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 455 transitions, 5539 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-21 16:13:31,597 INFO L231 Difference]: Finished difference. Result has 346 places, 419 transitions, 4678 flow [2024-06-21 16:13:31,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4397, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4678, PETRI_PLACES=346, PETRI_TRANSITIONS=419} [2024-06-21 16:13:31,598 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 302 predicate places. [2024-06-21 16:13:31,598 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 419 transitions, 4678 flow [2024-06-21 16:13:31,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:31,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:13:31,598 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 16:13:31,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 16:13:31,598 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:13:31,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:13:31,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1481437720, now seen corresponding path program 15 times [2024-06-21 16:13:31,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:13:31,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874087496] [2024-06-21 16:13:31,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:13:31,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:13:31,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:13:33,134 INFO 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 16:13:33,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:13:33,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874087496] [2024-06-21 16:13:33,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874087496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:13:33,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:13:33,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:13:33,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140510076] [2024-06-21 16:13:33,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:13:33,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:13:33,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:13:33,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:13:33,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:13:33,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:13:33,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 419 transitions, 4678 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 16:13:33,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:13:33,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:13:33,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:13:35,372 INFO L124 PetriNetUnfolderBase]: 5342/8392 cut-off events. [2024-06-21 16:13:35,373 INFO L125 PetriNetUnfolderBase]: For 1933563/1933599 co-relation queries the response was YES. [2024-06-21 16:13:35,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81343 conditions, 8392 events. 5342/8392 cut-off events. For 1933563/1933599 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 51953 event pairs, 1159 based on Foata normal form. 28/8399 useless extension candidates. Maximal degree in co-relation 81179. Up to 7660 conditions per place. [2024-06-21 16:13:35,509 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 385 selfloop transitions, 43 changer transitions 0/465 dead transitions. [2024-06-21 16:13:35,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 465 transitions, 5696 flow [2024-06-21 16:13:35,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:13:35,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:13:35,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 210 transitions. [2024-06-21 16:13:35,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4439746300211416 [2024-06-21 16:13:35,510 INFO L175 Difference]: Start difference. First operand has 346 places, 419 transitions, 4678 flow. Second operand 11 states and 210 transitions. [2024-06-21 16:13:35,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 465 transitions, 5696 flow [2024-06-21 16:13:38,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 465 transitions, 5409 flow, removed 107 selfloop flow, removed 7 redundant places. [2024-06-21 16:13:38,292 INFO L231 Difference]: Finished difference. Result has 350 places, 419 transitions, 4485 flow [2024-06-21 16:13:38,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4391, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4485, PETRI_PLACES=350, PETRI_TRANSITIONS=419} [2024-06-21 16:13:38,292 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 306 predicate places. [2024-06-21 16:13:38,293 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 419 transitions, 4485 flow [2024-06-21 16:13:38,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states 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 16:13:38,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:13:38,293 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 16:13:38,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 16:13:38,293 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:13:38,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:13:38,294 INFO L85 PathProgramCache]: Analyzing trace with hash -2032032705, now seen corresponding path program 4 times [2024-06-21 16:13:38,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:13:38,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053204987] [2024-06-21 16:13:38,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:13:38,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:13:38,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:13:39,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:13:39,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:13:39,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053204987] [2024-06-21 16:13:39,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053204987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:13:39,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:13:39,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:13:39,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638288724] [2024-06-21 16:13:39,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:13:39,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:13:39,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:13:39,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:13:39,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:13:39,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:13:39,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 419 transitions, 4485 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:39,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:13:39,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:13:39,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:13:41,105 INFO L124 PetriNetUnfolderBase]: 5532/8671 cut-off events. [2024-06-21 16:13:41,105 INFO L125 PetriNetUnfolderBase]: For 1901430/1901475 co-relation queries the response was YES. [2024-06-21 16:13:41,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83188 conditions, 8671 events. 5532/8671 cut-off events. For 1901430/1901475 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 53471 event pairs, 1349 based on Foata normal form. 9/8616 useless extension candidates. Maximal degree in co-relation 83023. Up to 8117 conditions per place. [2024-06-21 16:13:41,242 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 344 selfloop transitions, 23 changer transitions 0/440 dead transitions. [2024-06-21 16:13:41,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 440 transitions, 5337 flow [2024-06-21 16:13:41,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:13:41,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:13:41,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 16:13:41,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-21 16:13:41,243 INFO L175 Difference]: Start difference. First operand has 350 places, 419 transitions, 4485 flow. Second operand 8 states and 144 transitions. [2024-06-21 16:13:41,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 440 transitions, 5337 flow [2024-06-21 16:13:44,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 440 transitions, 5225 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 16:13:44,713 INFO L231 Difference]: Finished difference. Result has 348 places, 423 transitions, 4492 flow [2024-06-21 16:13:44,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4373, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4492, PETRI_PLACES=348, PETRI_TRANSITIONS=423} [2024-06-21 16:13:44,714 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 304 predicate places. [2024-06-21 16:13:44,714 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 423 transitions, 4492 flow [2024-06-21 16:13:44,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:44,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:13:44,714 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 16:13:44,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 16:13:44,714 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:13:44,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:13:44,715 INFO L85 PathProgramCache]: Analyzing trace with hash -2032045725, now seen corresponding path program 5 times [2024-06-21 16:13:44,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:13:44,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562389092] [2024-06-21 16:13:44,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:13:44,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:13:44,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:13:45,511 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 16:13:45,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:13:45,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562389092] [2024-06-21 16:13:45,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562389092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:13:45,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:13:45,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:13:45,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284271927] [2024-06-21 16:13:45,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:13:45,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:13:45,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:13:45,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:13:45,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:13:45,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:13:45,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 423 transitions, 4492 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:45,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:13:45,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:13:45,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:13:47,496 INFO L124 PetriNetUnfolderBase]: 5538/8686 cut-off events. [2024-06-21 16:13:47,497 INFO L125 PetriNetUnfolderBase]: For 1901027/1901067 co-relation queries the response was YES. [2024-06-21 16:13:47,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83380 conditions, 8686 events. 5538/8686 cut-off events. For 1901027/1901067 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 53625 event pairs, 1346 based on Foata normal form. 2/8635 useless extension candidates. Maximal degree in co-relation 83214. Up to 8073 conditions per place. [2024-06-21 16:13:47,632 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 339 selfloop transitions, 32 changer transitions 0/444 dead transitions. [2024-06-21 16:13:47,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 444 transitions, 5587 flow [2024-06-21 16:13:47,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:13:47,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:13:47,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 16:13:47,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-21 16:13:47,633 INFO L175 Difference]: Start difference. First operand has 348 places, 423 transitions, 4492 flow. Second operand 8 states and 145 transitions. [2024-06-21 16:13:47,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 444 transitions, 5587 flow [2024-06-21 16:13:51,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 444 transitions, 5510 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 16:13:51,674 INFO L231 Difference]: Finished difference. Result has 351 places, 427 transitions, 4575 flow [2024-06-21 16:13:51,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4415, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4575, PETRI_PLACES=351, PETRI_TRANSITIONS=427} [2024-06-21 16:13:51,675 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 307 predicate places. [2024-06-21 16:13:51,675 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 427 transitions, 4575 flow [2024-06-21 16:13:51,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:51,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:13:51,675 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 16:13:51,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 16:13:51,675 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:13:51,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:13:51,676 INFO L85 PathProgramCache]: Analyzing trace with hash -2016795120, now seen corresponding path program 1 times [2024-06-21 16:13:51,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:13:51,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691641401] [2024-06-21 16:13:51,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:13:51,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:13:51,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:13:52,425 INFO 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 16:13:52,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:13:52,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691641401] [2024-06-21 16:13:52,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691641401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:13:52,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:13:52,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:13:52,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099922773] [2024-06-21 16:13:52,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:13:52,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:13:52,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:13:52,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:13:52,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:13:52,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:13:52,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 427 transitions, 4575 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:52,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:13:52,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:13:52,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:13:54,432 INFO L124 PetriNetUnfolderBase]: 5534/8674 cut-off events. [2024-06-21 16:13:54,432 INFO L125 PetriNetUnfolderBase]: For 1917397/1917437 co-relation queries the response was YES. [2024-06-21 16:13:54,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83425 conditions, 8674 events. 5534/8674 cut-off events. For 1917397/1917437 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 53408 event pairs, 1352 based on Foata normal form. 2/8622 useless extension candidates. Maximal degree in co-relation 83257. Up to 8147 conditions per place. [2024-06-21 16:13:54,567 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 353 selfloop transitions, 17 changer transitions 0/443 dead transitions. [2024-06-21 16:13:54,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 443 transitions, 5405 flow [2024-06-21 16:13:54,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:13:54,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:13:54,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 16:13:54,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-21 16:13:54,568 INFO L175 Difference]: Start difference. First operand has 351 places, 427 transitions, 4575 flow. Second operand 8 states and 137 transitions. [2024-06-21 16:13:54,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 443 transitions, 5405 flow [2024-06-21 16:13:58,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 443 transitions, 5224 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-21 16:13:58,510 INFO L231 Difference]: Finished difference. Result has 351 places, 430 transitions, 4500 flow [2024-06-21 16:13:58,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4394, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4500, PETRI_PLACES=351, PETRI_TRANSITIONS=430} [2024-06-21 16:13:58,511 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 307 predicate places. [2024-06-21 16:13:58,511 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 430 transitions, 4500 flow [2024-06-21 16:13:58,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:58,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:13:58,511 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 16:13:58,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 16:13:58,511 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:13:58,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:13:58,512 INFO L85 PathProgramCache]: Analyzing trace with hash -2017300575, now seen corresponding path program 6 times [2024-06-21 16:13:58,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:13:58,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264861134] [2024-06-21 16:13:58,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:13:58,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:13:58,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:13:59,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:13:59,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:13:59,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264861134] [2024-06-21 16:13:59,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264861134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:13:59,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:13:59,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:13:59,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57326225] [2024-06-21 16:13:59,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:13:59,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:13:59,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:13:59,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:13:59,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:13:59,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:13:59,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 430 transitions, 4500 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:59,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:13:59,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:13:59,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:01,246 INFO L124 PetriNetUnfolderBase]: 5512/8652 cut-off events. [2024-06-21 16:14:01,247 INFO L125 PetriNetUnfolderBase]: For 1931981/1931991 co-relation queries the response was YES. [2024-06-21 16:14:01,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82846 conditions, 8652 events. 5512/8652 cut-off events. For 1931981/1931991 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 53360 event pairs, 1342 based on Foata normal form. 6/8605 useless extension candidates. Maximal degree in co-relation 82679. Up to 8120 conditions per place. [2024-06-21 16:14:01,379 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 357 selfloop transitions, 18 changer transitions 0/448 dead transitions. [2024-06-21 16:14:01,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 448 transitions, 5342 flow [2024-06-21 16:14:01,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:14:01,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:14:01,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 16:14:01,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-21 16:14:01,380 INFO L175 Difference]: Start difference. First operand has 351 places, 430 transitions, 4500 flow. Second operand 8 states and 139 transitions. [2024-06-21 16:14:01,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 448 transitions, 5342 flow [2024-06-21 16:14:05,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 448 transitions, 5252 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-21 16:14:05,197 INFO L231 Difference]: Finished difference. Result has 353 places, 434 transitions, 4515 flow [2024-06-21 16:14:05,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4410, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4515, PETRI_PLACES=353, PETRI_TRANSITIONS=434} [2024-06-21 16:14:05,197 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 309 predicate places. [2024-06-21 16:14:05,197 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 434 transitions, 4515 flow [2024-06-21 16:14:05,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:05,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:05,198 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 16:14:05,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 16:14:05,198 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:14:05,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:05,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1195509588, now seen corresponding path program 1 times [2024-06-21 16:14:05,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:05,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884416993] [2024-06-21 16:14:05,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:05,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:05,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:05,900 INFO 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 16:14:05,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:05,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884416993] [2024-06-21 16:14:05,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884416993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:05,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:05,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:14:05,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054581605] [2024-06-21 16:14:05,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:05,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:14:05,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:05,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:14:05,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:14:06,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 16:14:06,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 434 transitions, 4515 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 16:14:06,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:06,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 16:14:06,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:08,221 INFO L124 PetriNetUnfolderBase]: 6013/9186 cut-off events. [2024-06-21 16:14:08,221 INFO L125 PetriNetUnfolderBase]: For 1947152/1947152 co-relation queries the response was YES. [2024-06-21 16:14:08,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87333 conditions, 9186 events. 6013/9186 cut-off events. For 1947152/1947152 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 54275 event pairs, 1407 based on Foata normal form. 2/9186 useless extension candidates. Maximal degree in co-relation 87165. Up to 9130 conditions per place. [2024-06-21 16:14:08,364 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 436 selfloop transitions, 19 changer transitions 0/458 dead transitions. [2024-06-21 16:14:08,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 458 transitions, 5537 flow [2024-06-21 16:14:08,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:14:08,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:14:08,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 16:14:08,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-21 16:14:08,365 INFO L175 Difference]: Start difference. First operand has 353 places, 434 transitions, 4515 flow. Second operand 8 states and 132 transitions. [2024-06-21 16:14:08,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 458 transitions, 5537 flow [2024-06-21 16:14:11,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 458 transitions, 5472 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 16:14:11,787 INFO L231 Difference]: Finished difference. Result has 355 places, 437 transitions, 4559 flow [2024-06-21 16:14:11,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4450, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4559, PETRI_PLACES=355, PETRI_TRANSITIONS=437} [2024-06-21 16:14:11,787 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 311 predicate places. [2024-06-21 16:14:11,787 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 437 transitions, 4559 flow [2024-06-21 16:14:11,787 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 16:14:11,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:11,788 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 16:14:11,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 16:14:11,788 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:14:11,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:11,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1195389432, now seen corresponding path program 1 times [2024-06-21 16:14:11,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:11,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448809473] [2024-06-21 16:14:11,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:11,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:11,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:12,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:12,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:12,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448809473] [2024-06-21 16:14:12,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448809473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:12,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:12,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:14:12,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401341868] [2024-06-21 16:14:12,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:12,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:14:12,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:12,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:14:12,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:14:12,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 16:14:12,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 437 transitions, 4559 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 16:14:12,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:12,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 16:14:12,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:14,890 INFO L124 PetriNetUnfolderBase]: 6028/9207 cut-off events. [2024-06-21 16:14:14,890 INFO L125 PetriNetUnfolderBase]: For 1985118/1985118 co-relation queries the response was YES. [2024-06-21 16:14:14,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88180 conditions, 9207 events. 6028/9207 cut-off events. For 1985118/1985118 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 54401 event pairs, 1404 based on Foata normal form. 3/9208 useless extension candidates. Maximal degree in co-relation 88011. Up to 9076 conditions per place. [2024-06-21 16:14:15,050 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 423 selfloop transitions, 42 changer transitions 0/468 dead transitions. [2024-06-21 16:14:15,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 468 transitions, 5901 flow [2024-06-21 16:14:15,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:14:15,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:14:15,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 16:14:15,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-21 16:14:15,057 INFO L175 Difference]: Start difference. First operand has 355 places, 437 transitions, 4559 flow. Second operand 8 states and 142 transitions. [2024-06-21 16:14:15,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 468 transitions, 5901 flow [2024-06-21 16:14:18,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 468 transitions, 5816 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 16:14:18,268 INFO L231 Difference]: Finished difference. Result has 357 places, 443 transitions, 4682 flow [2024-06-21 16:14:18,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4474, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4682, PETRI_PLACES=357, PETRI_TRANSITIONS=443} [2024-06-21 16:14:18,269 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 313 predicate places. [2024-06-21 16:14:18,269 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 443 transitions, 4682 flow [2024-06-21 16:14:18,269 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 16:14:18,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:18,269 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 16:14:18,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 16:14:18,269 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:14:18,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:18,270 INFO L85 PathProgramCache]: Analyzing trace with hash 2048623890, now seen corresponding path program 2 times [2024-06-21 16:14:18,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:18,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9066287] [2024-06-21 16:14:18,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:18,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:18,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:19,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:19,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:19,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9066287] [2024-06-21 16:14:19,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9066287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:19,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:19,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:14:19,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749373755] [2024-06-21 16:14:19,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:19,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:14:19,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:19,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:14:19,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:14:19,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 16:14:19,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 443 transitions, 4682 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 16:14:19,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:19,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 16:14:19,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:21,353 INFO L124 PetriNetUnfolderBase]: 6038/9221 cut-off events. [2024-06-21 16:14:21,353 INFO L125 PetriNetUnfolderBase]: For 2016988/2016988 co-relation queries the response was YES. [2024-06-21 16:14:21,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89210 conditions, 9221 events. 6038/9221 cut-off events. For 2016988/2016988 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 54538 event pairs, 1409 based on Foata normal form. 2/9221 useless extension candidates. Maximal degree in co-relation 89040. Up to 9130 conditions per place. [2024-06-21 16:14:21,487 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 429 selfloop transitions, 38 changer transitions 0/470 dead transitions. [2024-06-21 16:14:21,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 470 transitions, 6030 flow [2024-06-21 16:14:21,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:14:21,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:14:21,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 16:14:21,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-21 16:14:21,488 INFO L175 Difference]: Start difference. First operand has 357 places, 443 transitions, 4682 flow. Second operand 8 states and 136 transitions. [2024-06-21 16:14:21,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 470 transitions, 6030 flow [2024-06-21 16:14:24,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 470 transitions, 5921 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-21 16:14:24,454 INFO L231 Difference]: Finished difference. Result has 361 places, 449 transitions, 4793 flow [2024-06-21 16:14:24,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4573, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4793, PETRI_PLACES=361, PETRI_TRANSITIONS=449} [2024-06-21 16:14:24,455 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 317 predicate places. [2024-06-21 16:14:24,455 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 449 transitions, 4793 flow [2024-06-21 16:14:24,455 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 16:14:24,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:24,455 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 16:14:24,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 16:14:24,455 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:14:24,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:24,456 INFO L85 PathProgramCache]: Analyzing trace with hash 2053272216, now seen corresponding path program 2 times [2024-06-21 16:14:24,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:24,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533440570] [2024-06-21 16:14:24,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:24,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:24,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:25,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:25,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:25,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533440570] [2024-06-21 16:14:25,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533440570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:25,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:25,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:14:25,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431602] [2024-06-21 16:14:25,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:25,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:14:25,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:25,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:14:25,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:14:25,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 16:14:25,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 449 transitions, 4793 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 16:14:25,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:25,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 16:14:25,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:27,560 INFO L124 PetriNetUnfolderBase]: 6077/9275 cut-off events. [2024-06-21 16:14:27,560 INFO L125 PetriNetUnfolderBase]: For 2079729/2079729 co-relation queries the response was YES. [2024-06-21 16:14:27,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90517 conditions, 9275 events. 6077/9275 cut-off events. For 2079729/2079729 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 54785 event pairs, 1408 based on Foata normal form. 3/9276 useless extension candidates. Maximal degree in co-relation 90345. Up to 9125 conditions per place. [2024-06-21 16:14:27,697 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 429 selfloop transitions, 46 changer transitions 0/478 dead transitions. [2024-06-21 16:14:27,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 478 transitions, 6341 flow [2024-06-21 16:14:27,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:14:27,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:14:27,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 16:14:27,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-21 16:14:27,699 INFO L175 Difference]: Start difference. First operand has 361 places, 449 transitions, 4793 flow. Second operand 8 states and 141 transitions. [2024-06-21 16:14:27,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 478 transitions, 6341 flow [2024-06-21 16:14:31,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 478 transitions, 6238 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-21 16:14:31,186 INFO L231 Difference]: Finished difference. Result has 365 places, 455 transitions, 4860 flow [2024-06-21 16:14:31,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4690, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4860, PETRI_PLACES=365, PETRI_TRANSITIONS=455} [2024-06-21 16:14:31,187 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 321 predicate places. [2024-06-21 16:14:31,187 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 455 transitions, 4860 flow [2024-06-21 16:14:31,187 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 16:14:31,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:31,187 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 16:14:31,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 16:14:31,187 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:14:31,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:31,188 INFO L85 PathProgramCache]: Analyzing trace with hash -358313582, now seen corresponding path program 3 times [2024-06-21 16:14:31,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:31,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617066417] [2024-06-21 16:14:31,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:31,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:31,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:31,957 INFO 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 16:14:31,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:31,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617066417] [2024-06-21 16:14:31,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617066417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:31,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:31,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:14:31,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479443898] [2024-06-21 16:14:31,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:31,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:14:31,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:31,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:14:31,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:14:32,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 16:14:32,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 455 transitions, 4860 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 16:14:32,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:32,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 16:14:32,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:34,328 INFO L124 PetriNetUnfolderBase]: 6087/9289 cut-off events. [2024-06-21 16:14:34,328 INFO L125 PetriNetUnfolderBase]: For 2106376/2106376 co-relation queries the response was YES. [2024-06-21 16:14:34,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90944 conditions, 9289 events. 6087/9289 cut-off events. For 2106376/2106376 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 54918 event pairs, 1413 based on Foata normal form. 2/9289 useless extension candidates. Maximal degree in co-relation 90770. Up to 9194 conditions per place. [2024-06-21 16:14:34,467 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 433 selfloop transitions, 40 changer transitions 0/476 dead transitions. [2024-06-21 16:14:34,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 476 transitions, 6140 flow [2024-06-21 16:14:34,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:14:34,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:14:34,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 16:14:34,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38953488372093026 [2024-06-21 16:14:34,468 INFO L175 Difference]: Start difference. First operand has 365 places, 455 transitions, 4860 flow. Second operand 8 states and 134 transitions. [2024-06-21 16:14:34,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 476 transitions, 6140 flow [2024-06-21 16:14:38,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 476 transitions, 6057 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-21 16:14:38,751 INFO L231 Difference]: Finished difference. Result has 369 places, 458 transitions, 4919 flow [2024-06-21 16:14:38,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4777, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4919, PETRI_PLACES=369, PETRI_TRANSITIONS=458} [2024-06-21 16:14:38,752 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 325 predicate places. [2024-06-21 16:14:38,752 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 458 transitions, 4919 flow [2024-06-21 16:14:38,752 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 16:14:38,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:38,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:38,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 16:14:38,752 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:14:38,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:38,753 INFO L85 PathProgramCache]: Analyzing trace with hash -358313396, now seen corresponding path program 3 times [2024-06-21 16:14:38,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:38,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432129010] [2024-06-21 16:14:38,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:38,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:38,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:39,465 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 16:14:39,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:39,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432129010] [2024-06-21 16:14:39,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432129010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:39,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:39,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:14:39,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551588062] [2024-06-21 16:14:39,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:39,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:14:39,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:39,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:14:39,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:14:39,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 16:14:39,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 458 transitions, 4919 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 16:14:39,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:39,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 16:14:39,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:41,908 INFO L124 PetriNetUnfolderBase]: 6078/9277 cut-off events. [2024-06-21 16:14:41,908 INFO L125 PetriNetUnfolderBase]: For 2126527/2126527 co-relation queries the response was YES. [2024-06-21 16:14:42,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90739 conditions, 9277 events. 6078/9277 cut-off events. For 2126527/2126527 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 54843 event pairs, 1404 based on Foata normal form. 3/9278 useless extension candidates. Maximal degree in co-relation 90564. Up to 9132 conditions per place. [2024-06-21 16:14:42,050 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 434 selfloop transitions, 45 changer transitions 0/482 dead transitions. [2024-06-21 16:14:42,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 482 transitions, 6187 flow [2024-06-21 16:14:42,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:14:42,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:14:42,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 16:14:42,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-21 16:14:42,052 INFO L175 Difference]: Start difference. First operand has 369 places, 458 transitions, 4919 flow. Second operand 8 states and 143 transitions. [2024-06-21 16:14:42,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 482 transitions, 6187 flow [2024-06-21 16:14:46,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 482 transitions, 6067 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-21 16:14:46,485 INFO L231 Difference]: Finished difference. Result has 372 places, 458 transitions, 4895 flow [2024-06-21 16:14:46,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4799, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4895, PETRI_PLACES=372, PETRI_TRANSITIONS=458} [2024-06-21 16:14:46,486 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 328 predicate places. [2024-06-21 16:14:46,486 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 458 transitions, 4895 flow [2024-06-21 16:14:46,486 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 16:14:46,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:46,486 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 16:14:46,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 16:14:46,486 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:14:46,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:46,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1413061212, now seen corresponding path program 4 times [2024-06-21 16:14:46,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:46,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906778319] [2024-06-21 16:14:46,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:46,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:46,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:47,294 INFO 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 16:14:47,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:47,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906778319] [2024-06-21 16:14:47,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906778319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:47,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:47,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:14:47,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324286251] [2024-06-21 16:14:47,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:47,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:14:47,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:47,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:14:47,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:14:47,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 16:14:47,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 458 transitions, 4895 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 16:14:47,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:47,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 16:14:47,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:49,631 INFO L124 PetriNetUnfolderBase]: 6093/9299 cut-off events. [2024-06-21 16:14:49,631 INFO L125 PetriNetUnfolderBase]: For 2160502/2160505 co-relation queries the response was YES. [2024-06-21 16:14:49,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91115 conditions, 9299 events. 6093/9299 cut-off events. For 2160502/2160505 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 54950 event pairs, 1418 based on Foata normal form. 3/9299 useless extension candidates. Maximal degree in co-relation 90939. Up to 9146 conditions per place. [2024-06-21 16:14:49,790 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 425 selfloop transitions, 51 changer transitions 0/479 dead transitions. [2024-06-21 16:14:49,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 479 transitions, 6184 flow [2024-06-21 16:14:49,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:14:49,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:14:49,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 16:14:49,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38953488372093026 [2024-06-21 16:14:49,791 INFO L175 Difference]: Start difference. First operand has 372 places, 458 transitions, 4895 flow. Second operand 8 states and 134 transitions. [2024-06-21 16:14:49,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 479 transitions, 6184 flow [2024-06-21 16:14:53,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 479 transitions, 6080 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 16:14:53,612 INFO L231 Difference]: Finished difference. Result has 373 places, 461 transitions, 4944 flow [2024-06-21 16:14:53,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4797, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4944, PETRI_PLACES=373, PETRI_TRANSITIONS=461} [2024-06-21 16:14:53,612 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 329 predicate places. [2024-06-21 16:14:53,612 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 461 transitions, 4944 flow [2024-06-21 16:14:53,612 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 16:14:53,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:53,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:53,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 16:14:53,613 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:14:53,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:53,613 INFO L85 PathProgramCache]: Analyzing trace with hash -130405736, now seen corresponding path program 5 times [2024-06-21 16:14:53,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:53,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122453974] [2024-06-21 16:14:53,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:53,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:53,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:54,309 INFO 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 16:14:54,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:54,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122453974] [2024-06-21 16:14:54,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122453974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:54,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:54,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:14:54,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040265517] [2024-06-21 16:14:54,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:54,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:14:54,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:54,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:14:54,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:14:54,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 16:14:54,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 461 transitions, 4944 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 16:14:54,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:54,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 16:14:54,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:56,686 INFO L124 PetriNetUnfolderBase]: 6108/9320 cut-off events. [2024-06-21 16:14:56,687 INFO L125 PetriNetUnfolderBase]: For 2195042/2195045 co-relation queries the response was YES. [2024-06-21 16:14:56,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91554 conditions, 9320 events. 6108/9320 cut-off events. For 2195042/2195045 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 55092 event pairs, 1418 based on Foata normal form. 3/9320 useless extension candidates. Maximal degree in co-relation 91377. Up to 9160 conditions per place. [2024-06-21 16:14:56,842 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 430 selfloop transitions, 51 changer transitions 0/484 dead transitions. [2024-06-21 16:14:56,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 484 transitions, 6255 flow [2024-06-21 16:14:56,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:14:56,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:14:56,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 16:14:56,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-21 16:14:56,843 INFO L175 Difference]: Start difference. First operand has 373 places, 461 transitions, 4944 flow. Second operand 8 states and 138 transitions. [2024-06-21 16:14:56,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 484 transitions, 6255 flow [2024-06-21 16:14:59,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 484 transitions, 6151 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 16:14:59,939 INFO L231 Difference]: Finished difference. Result has 376 places, 464 transitions, 4993 flow [2024-06-21 16:14:59,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4847, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4993, PETRI_PLACES=376, PETRI_TRANSITIONS=464} [2024-06-21 16:14:59,940 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 332 predicate places. [2024-06-21 16:14:59,940 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 464 transitions, 4993 flow [2024-06-21 16:14:59,940 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 16:14:59,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:59,940 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 16:14:59,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 16:14:59,941 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:14:59,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:59,941 INFO L85 PathProgramCache]: Analyzing trace with hash -2025366000, now seen corresponding path program 4 times [2024-06-21 16:14:59,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:59,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848642990] [2024-06-21 16:14:59,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:59,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:59,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:15:00,716 INFO 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 16:15:00,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:15:00,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848642990] [2024-06-21 16:15:00,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848642990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:15:00,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:15:00,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:15:00,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295484442] [2024-06-21 16:15:00,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:15:00,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:15:00,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:15:00,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:15:00,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:15:00,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 16:15:00,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 464 transitions, 4993 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 16:15:00,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:15:00,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 16:15:00,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:15:03,050 INFO L124 PetriNetUnfolderBase]: 6102/9312 cut-off events. [2024-06-21 16:15:03,051 INFO L125 PetriNetUnfolderBase]: For 2207890/2207893 co-relation queries the response was YES. [2024-06-21 16:15:03,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91487 conditions, 9312 events. 6102/9312 cut-off events. For 2207890/2207893 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 55039 event pairs, 1431 based on Foata normal form. 2/9311 useless extension candidates. Maximal degree in co-relation 91309. Up to 9219 conditions per place. [2024-06-21 16:15:03,244 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 434 selfloop transitions, 40 changer transitions 0/477 dead transitions. [2024-06-21 16:15:03,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 477 transitions, 5975 flow [2024-06-21 16:15:03,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:15:03,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:15:03,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-21 16:15:03,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37790697674418605 [2024-06-21 16:15:03,245 INFO L175 Difference]: Start difference. First operand has 376 places, 464 transitions, 4993 flow. Second operand 8 states and 130 transitions. [2024-06-21 16:15:03,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 477 transitions, 5975 flow [2024-06-21 16:15:07,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 477 transitions, 5784 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-21 16:15:07,155 INFO L231 Difference]: Finished difference. Result has 377 places, 464 transitions, 4888 flow [2024-06-21 16:15:07,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4802, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4888, PETRI_PLACES=377, PETRI_TRANSITIONS=464} [2024-06-21 16:15:07,156 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 333 predicate places. [2024-06-21 16:15:07,156 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 464 transitions, 4888 flow [2024-06-21 16:15:07,156 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 16:15:07,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:15:07,156 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 16:15:07,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 16:15:07,157 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:15:07,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:15:07,157 INFO L85 PathProgramCache]: Analyzing trace with hash -130412246, now seen corresponding path program 6 times [2024-06-21 16:15:07,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:15:07,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847341192] [2024-06-21 16:15:07,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:15:07,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:15:07,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:15:07,910 INFO 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 16:15:07,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:15:07,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847341192] [2024-06-21 16:15:07,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847341192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:15:07,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:15:07,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:15:07,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020145280] [2024-06-21 16:15:07,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:15:07,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:15:07,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:15:07,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:15:07,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:15:08,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 16:15:08,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 464 transitions, 4888 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 16:15:08,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:15:08,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 16:15:08,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:15:10,297 INFO L124 PetriNetUnfolderBase]: 6093/9300 cut-off events. [2024-06-21 16:15:10,298 INFO L125 PetriNetUnfolderBase]: For 2226803/2226806 co-relation queries the response was YES. [2024-06-21 16:15:10,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91185 conditions, 9300 events. 6093/9300 cut-off events. For 2226803/2226806 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 55000 event pairs, 1411 based on Foata normal form. 3/9300 useless extension candidates. Maximal degree in co-relation 91006. Up to 9145 conditions per place. [2024-06-21 16:15:10,451 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 428 selfloop transitions, 52 changer transitions 0/483 dead transitions. [2024-06-21 16:15:10,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 483 transitions, 5914 flow [2024-06-21 16:15:10,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:15:10,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:15:10,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 16:15:10,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-21 16:15:10,453 INFO L175 Difference]: Start difference. First operand has 377 places, 464 transitions, 4888 flow. Second operand 8 states and 136 transitions. [2024-06-21 16:15:10,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 483 transitions, 5914 flow [2024-06-21 16:15:14,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 483 transitions, 5766 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-21 16:15:14,900 INFO L231 Difference]: Finished difference. Result has 377 places, 464 transitions, 4850 flow [2024-06-21 16:15:14,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4740, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4850, PETRI_PLACES=377, PETRI_TRANSITIONS=464} [2024-06-21 16:15:14,901 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 333 predicate places. [2024-06-21 16:15:14,901 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 464 transitions, 4850 flow [2024-06-21 16:15:14,901 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 16:15:14,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:15:14,901 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 16:15:14,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 16:15:14,902 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:15:14,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:15:14,902 INFO L85 PathProgramCache]: Analyzing trace with hash -2016777264, now seen corresponding path program 1 times [2024-06-21 16:15:14,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:15:14,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693791873] [2024-06-21 16:15:14,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:15:14,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:15:14,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:15:16,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:15:16,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:15:16,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693791873] [2024-06-21 16:15:16,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693791873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:15:16,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:15:16,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:15:16,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128664210] [2024-06-21 16:15:16,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:15:16,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:15:16,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:15:16,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:15:16,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:15:16,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:15:16,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 464 transitions, 4850 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 16:15:16,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:15:16,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:15:16,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:15:18,241 INFO L124 PetriNetUnfolderBase]: 5587/8748 cut-off events. [2024-06-21 16:15:18,241 INFO L125 PetriNetUnfolderBase]: For 2241986/2241998 co-relation queries the response was YES. [2024-06-21 16:15:18,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87178 conditions, 8748 events. 5587/8748 cut-off events. For 2241986/2241998 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 53743 event pairs, 1338 based on Foata normal form. 4/8691 useless extension candidates. Maximal degree in co-relation 86998. Up to 8227 conditions per place. [2024-06-21 16:15:18,393 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 390 selfloop transitions, 16 changer transitions 0/479 dead transitions. [2024-06-21 16:15:18,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 479 transitions, 5744 flow [2024-06-21 16:15:18,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:15:18,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:15:18,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 16:15:18,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-21 16:15:18,395 INFO L175 Difference]: Start difference. First operand has 377 places, 464 transitions, 4850 flow. Second operand 8 states and 136 transitions. [2024-06-21 16:15:18,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 479 transitions, 5744 flow [2024-06-21 16:15:22,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 479 transitions, 5608 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 16:15:22,198 INFO L231 Difference]: Finished difference. Result has 377 places, 466 transitions, 4807 flow [2024-06-21 16:15:22,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4714, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4807, PETRI_PLACES=377, PETRI_TRANSITIONS=466} [2024-06-21 16:15:22,199 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 333 predicate places. [2024-06-21 16:15:22,199 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 466 transitions, 4807 flow [2024-06-21 16:15:22,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 16:15:22,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:15:22,200 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 16:15:22,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 16:15:22,202 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:15:22,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:15:22,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1944703772, now seen corresponding path program 1 times [2024-06-21 16:15:22,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:15:22,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166117128] [2024-06-21 16:15:22,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:15:22,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:15:22,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:15:23,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:15:23,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:15:23,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166117128] [2024-06-21 16:15:23,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166117128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:15:23,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:15:23,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:15:23,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533736046] [2024-06-21 16:15:23,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:15:23,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:15:23,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:15:23,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:15:23,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:15:23,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:15:23,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 466 transitions, 4807 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:23,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:15:23,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:15:23,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:15:25,228 INFO L124 PetriNetUnfolderBase]: 5918/9098 cut-off events. [2024-06-21 16:15:25,229 INFO L125 PetriNetUnfolderBase]: For 2263842/2263844 co-relation queries the response was YES. [2024-06-21 16:15:25,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90250 conditions, 9098 events. 5918/9098 cut-off events. For 2263842/2263844 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 54412 event pairs, 1373 based on Foata normal form. 3/9063 useless extension candidates. Maximal degree in co-relation 90069. Up to 8787 conditions per place. [2024-06-21 16:15:25,379 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 428 selfloop transitions, 49 changer transitions 0/511 dead transitions. [2024-06-21 16:15:25,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 511 transitions, 6278 flow [2024-06-21 16:15:25,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:15:25,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:15:25,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 16:15:25,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-21 16:15:25,381 INFO L175 Difference]: Start difference. First operand has 377 places, 466 transitions, 4807 flow. Second operand 8 states and 153 transitions. [2024-06-21 16:15:25,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 511 transitions, 6278 flow [2024-06-21 16:15:29,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 511 transitions, 6201 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-21 16:15:29,419 INFO L231 Difference]: Finished difference. Result has 381 places, 480 transitions, 5069 flow [2024-06-21 16:15:29,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4730, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5069, PETRI_PLACES=381, PETRI_TRANSITIONS=480} [2024-06-21 16:15:29,420 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 337 predicate places. [2024-06-21 16:15:29,420 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 480 transitions, 5069 flow [2024-06-21 16:15:29,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:29,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:15:29,420 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 16:15:29,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 16:15:29,420 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:15:29,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:15:29,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1938397690, now seen corresponding path program 1 times [2024-06-21 16:15:29,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:15:29,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650263369] [2024-06-21 16:15:29,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:15:29,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:15:29,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:15:30,227 INFO 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 16:15:30,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:15:30,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650263369] [2024-06-21 16:15:30,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650263369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:15:30,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:15:30,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:15:30,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959372061] [2024-06-21 16:15:30,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:15:30,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:15:30,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:15:30,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:15:30,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:15:30,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 16:15:30,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 480 transitions, 5069 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 16:15:30,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:15:30,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 16:15:30,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:15:32,276 INFO L124 PetriNetUnfolderBase]: 6111/9325 cut-off events. [2024-06-21 16:15:32,277 INFO L125 PetriNetUnfolderBase]: For 2306733/2306736 co-relation queries the response was YES. [2024-06-21 16:15:32,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92453 conditions, 9325 events. 6111/9325 cut-off events. For 2306733/2306736 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 55126 event pairs, 1413 based on Foata normal form. 3/9325 useless extension candidates. Maximal degree in co-relation 92269. Up to 9157 conditions per place. [2024-06-21 16:15:32,437 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 449 selfloop transitions, 65 changer transitions 0/517 dead transitions. [2024-06-21 16:15:32,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 517 transitions, 6929 flow [2024-06-21 16:15:32,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:15:32,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:15:32,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 16:15:32,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-21 16:15:32,438 INFO L175 Difference]: Start difference. First operand has 381 places, 480 transitions, 5069 flow. Second operand 8 states and 145 transitions. [2024-06-21 16:15:32,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 517 transitions, 6929 flow [2024-06-21 16:15:37,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 517 transitions, 6816 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-21 16:15:37,532 INFO L231 Difference]: Finished difference. Result has 385 places, 489 transitions, 5368 flow [2024-06-21 16:15:37,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4956, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5368, PETRI_PLACES=385, PETRI_TRANSITIONS=489} [2024-06-21 16:15:37,533 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 341 predicate places. [2024-06-21 16:15:37,533 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 489 transitions, 5368 flow [2024-06-21 16:15:37,534 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 16:15:37,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:15:37,534 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 16:15:37,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 16:15:37,534 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:15:37,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:15:37,535 INFO L85 PathProgramCache]: Analyzing trace with hash -104207014, now seen corresponding path program 2 times [2024-06-21 16:15:37,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:15:37,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469556778] [2024-06-21 16:15:37,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:15:37,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:15:37,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:15:38,477 INFO 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 16:15:38,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:15:38,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469556778] [2024-06-21 16:15:38,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469556778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:15:38,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:15:38,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:15:38,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906300247] [2024-06-21 16:15:38,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:15:38,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:15:38,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:15:38,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:15:38,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:15:38,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 16:15:38,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 489 transitions, 5368 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 16:15:38,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:15:38,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 16:15:38,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:15:40,559 INFO L124 PetriNetUnfolderBase]: 6124/9343 cut-off events. [2024-06-21 16:15:40,559 INFO L125 PetriNetUnfolderBase]: For 2353736/2353739 co-relation queries the response was YES. [2024-06-21 16:15:40,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93451 conditions, 9343 events. 6124/9343 cut-off events. For 2353736/2353739 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 55223 event pairs, 1413 based on Foata normal form. 3/9343 useless extension candidates. Maximal degree in co-relation 93266. Up to 9172 conditions per place. [2024-06-21 16:15:40,724 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 446 selfloop transitions, 72 changer transitions 0/521 dead transitions. [2024-06-21 16:15:40,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 521 transitions, 7166 flow [2024-06-21 16:15:40,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:15:40,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:15:40,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 16:15:40,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-21 16:15:40,725 INFO L175 Difference]: Start difference. First operand has 385 places, 489 transitions, 5368 flow. Second operand 8 states and 142 transitions. [2024-06-21 16:15:40,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 521 transitions, 7166 flow [2024-06-21 16:15:45,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 521 transitions, 6942 flow, removed 89 selfloop flow, removed 3 redundant places. [2024-06-21 16:15:45,252 INFO L231 Difference]: Finished difference. Result has 390 places, 496 transitions, 5498 flow [2024-06-21 16:15:45,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5190, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5498, PETRI_PLACES=390, PETRI_TRANSITIONS=496} [2024-06-21 16:15:45,252 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 346 predicate places. [2024-06-21 16:15:45,252 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 496 transitions, 5498 flow [2024-06-21 16:15:45,252 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 16:15:45,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:15:45,253 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 16:15:45,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 16:15:45,253 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:15:45,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:15:45,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1428566706, now seen corresponding path program 1 times [2024-06-21 16:15:45,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:15:45,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731834895] [2024-06-21 16:15:45,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:15:45,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:15:45,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:15:46,732 INFO 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 16:15:46,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:15:46,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731834895] [2024-06-21 16:15:46,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731834895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:15:46,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:15:46,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:15:46,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795508224] [2024-06-21 16:15:46,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:15:46,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:15:46,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:15:46,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:15:46,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:15:46,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:15:46,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 496 transitions, 5498 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:46,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:15:46,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:15:46,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:15:49,280 INFO L124 PetriNetUnfolderBase]: 6042/9271 cut-off events. [2024-06-21 16:15:49,280 INFO L125 PetriNetUnfolderBase]: For 2428373/2428376 co-relation queries the response was YES. [2024-06-21 16:15:49,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93765 conditions, 9271 events. 6042/9271 cut-off events. For 2428373/2428376 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 55422 event pairs, 1024 based on Foata normal form. 4/9262 useless extension candidates. Maximal degree in co-relation 93578. Up to 8089 conditions per place. [2024-06-21 16:15:49,493 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 392 selfloop transitions, 125 changer transitions 0/555 dead transitions. [2024-06-21 16:15:49,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 555 transitions, 6946 flow [2024-06-21 16:15:49,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:15:49,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:15:49,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 212 transitions. [2024-06-21 16:15:49,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44820295983086683 [2024-06-21 16:15:49,495 INFO L175 Difference]: Start difference. First operand has 390 places, 496 transitions, 5498 flow. Second operand 11 states and 212 transitions. [2024-06-21 16:15:49,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 555 transitions, 6946 flow [2024-06-21 16:15:54,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 555 transitions, 6776 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-21 16:15:54,582 INFO L231 Difference]: Finished difference. Result has 399 places, 508 transitions, 5888 flow [2024-06-21 16:15:54,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5328, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5888, PETRI_PLACES=399, PETRI_TRANSITIONS=508} [2024-06-21 16:15:54,582 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 355 predicate places. [2024-06-21 16:15:54,582 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 508 transitions, 5888 flow [2024-06-21 16:15:54,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:54,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:15:54,583 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 16:15:54,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 16:15:54,583 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:15:54,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:15:54,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1945059962, now seen corresponding path program 2 times [2024-06-21 16:15:54,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:15:54,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819312255] [2024-06-21 16:15:54,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:15:54,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:15:54,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:15:55,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:15:55,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:15:55,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819312255] [2024-06-21 16:15:55,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819312255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:15:55,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:15:55,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:15:55,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202233] [2024-06-21 16:15:55,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:15:55,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:15:55,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:15:55,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:15:55,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:15:56,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:15:56,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 508 transitions, 5888 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:56,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:15:56,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:15:56,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:15:58,405 INFO L124 PetriNetUnfolderBase]: 5952/9150 cut-off events. [2024-06-21 16:15:58,406 INFO L125 PetriNetUnfolderBase]: For 2428643/2428645 co-relation queries the response was YES. [2024-06-21 16:15:58,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93906 conditions, 9150 events. 5952/9150 cut-off events. For 2428643/2428645 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 54766 event pairs, 1315 based on Foata normal form. 3/9115 useless extension candidates. Maximal degree in co-relation 93716. Up to 8857 conditions per place. [2024-06-21 16:15:58,607 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 452 selfloop transitions, 42 changer transitions 0/533 dead transitions. [2024-06-21 16:15:58,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 533 transitions, 6941 flow [2024-06-21 16:15:58,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:15:58,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:15:58,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-21 16:15:58,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082687338501292 [2024-06-21 16:15:58,608 INFO L175 Difference]: Start difference. First operand has 399 places, 508 transitions, 5888 flow. Second operand 9 states and 158 transitions. [2024-06-21 16:15:58,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 533 transitions, 6941 flow [2024-06-21 16:16:03,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 533 transitions, 6579 flow, removed 123 selfloop flow, removed 5 redundant places. [2024-06-21 16:16:03,821 INFO L231 Difference]: Finished difference. Result has 403 places, 509 transitions, 5621 flow [2024-06-21 16:16:03,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5526, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5621, PETRI_PLACES=403, PETRI_TRANSITIONS=509} [2024-06-21 16:16:03,824 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 359 predicate places. [2024-06-21 16:16:03,824 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 509 transitions, 5621 flow [2024-06-21 16:16:03,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:03,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:03,825 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 16:16:03,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 16:16:03,825 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:16:03,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:03,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1945072858, now seen corresponding path program 1 times [2024-06-21 16:16:03,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:03,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644044736] [2024-06-21 16:16:03,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:03,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:03,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:16:05,054 INFO 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 16:16:05,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:16:05,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644044736] [2024-06-21 16:16:05,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644044736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:16:05,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:16:05,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:16:05,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990835796] [2024-06-21 16:16:05,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:16:05,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:16:05,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:16:05,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:16:05,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:16:05,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:16:05,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 509 transitions, 5621 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 16:16:05,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:16:05,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:16:05,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:16:07,388 INFO L124 PetriNetUnfolderBase]: 5738/8962 cut-off events. [2024-06-21 16:16:07,388 INFO L125 PetriNetUnfolderBase]: For 2582116/2582189 co-relation queries the response was YES. [2024-06-21 16:16:07,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93162 conditions, 8962 events. 5738/8962 cut-off events. For 2582116/2582189 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 55137 event pairs, 1292 based on Foata normal form. 9/8905 useless extension candidates. Maximal degree in co-relation 92970. Up to 8103 conditions per place. [2024-06-21 16:16:07,551 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 388 selfloop transitions, 79 changer transitions 0/552 dead transitions. [2024-06-21 16:16:07,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 552 transitions, 7365 flow [2024-06-21 16:16:07,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:16:07,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:16:07,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-21 16:16:07,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-21 16:16:07,552 INFO L175 Difference]: Start difference. First operand has 403 places, 509 transitions, 5621 flow. Second operand 9 states and 180 transitions. [2024-06-21 16:16:07,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 552 transitions, 7365 flow [2024-06-21 16:16:12,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 552 transitions, 7262 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 16:16:12,428 INFO L231 Difference]: Finished difference. Result has 405 places, 519 transitions, 5881 flow [2024-06-21 16:16:12,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5518, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5881, PETRI_PLACES=405, PETRI_TRANSITIONS=519} [2024-06-21 16:16:12,434 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 361 predicate places. [2024-06-21 16:16:12,434 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 519 transitions, 5881 flow [2024-06-21 16:16:12,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 16:16:12,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:12,434 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 16:16:12,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 16:16:12,434 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:16:12,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:12,435 INFO L85 PathProgramCache]: Analyzing trace with hash 33017276, now seen corresponding path program 3 times [2024-06-21 16:16:12,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:12,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658092396] [2024-06-21 16:16:12,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:12,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:12,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:16:13,335 INFO 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 16:16:13,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:16:13,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658092396] [2024-06-21 16:16:13,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658092396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:16:13,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:16:13,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:16:13,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9438521] [2024-06-21 16:16:13,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:16:13,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:16:13,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:16:13,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:16:13,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:16:13,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 16:16:13,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 519 transitions, 5881 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 16:16:13,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:16:13,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 16:16:13,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:16:15,929 INFO L124 PetriNetUnfolderBase]: 6243/9511 cut-off events. [2024-06-21 16:16:15,929 INFO L125 PetriNetUnfolderBase]: For 2566164/2566167 co-relation queries the response was YES. [2024-06-21 16:16:16,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98226 conditions, 9511 events. 6243/9511 cut-off events. For 2566164/2566167 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 56264 event pairs, 1379 based on Foata normal form. 3/9511 useless extension candidates. Maximal degree in co-relation 98033. Up to 9403 conditions per place. [2024-06-21 16:16:16,073 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 494 selfloop transitions, 52 changer transitions 0/549 dead transitions. [2024-06-21 16:16:16,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 549 transitions, 7437 flow [2024-06-21 16:16:16,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:16:16,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:16:16,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 16:16:16,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-21 16:16:16,074 INFO L175 Difference]: Start difference. First operand has 405 places, 519 transitions, 5881 flow. Second operand 8 states and 140 transitions. [2024-06-21 16:16:16,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 549 transitions, 7437 flow [2024-06-21 16:16:21,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 549 transitions, 7298 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-21 16:16:21,424 INFO L231 Difference]: Finished difference. Result has 410 places, 525 transitions, 6022 flow [2024-06-21 16:16:21,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5742, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6022, PETRI_PLACES=410, PETRI_TRANSITIONS=525} [2024-06-21 16:16:21,425 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 366 predicate places. [2024-06-21 16:16:21,425 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 525 transitions, 6022 flow [2024-06-21 16:16:21,425 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 16:16:21,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:21,425 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 16:16:21,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 16:16:21,426 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:16:21,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:21,426 INFO L85 PathProgramCache]: Analyzing trace with hash 33225813, now seen corresponding path program 1 times [2024-06-21 16:16:21,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:21,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279366987] [2024-06-21 16:16:21,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:21,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:21,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:16:22,193 INFO 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 16:16:22,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:16:22,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279366987] [2024-06-21 16:16:22,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279366987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:16:22,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:16:22,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:16:22,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860777303] [2024-06-21 16:16:22,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:16:22,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:16:22,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:16:22,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:16:22,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:16:22,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 16:16:22,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 525 transitions, 6022 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 16:16:22,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:16:22,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 16:16:22,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:16:24,716 INFO L124 PetriNetUnfolderBase]: 6256/9529 cut-off events. [2024-06-21 16:16:24,716 INFO L125 PetriNetUnfolderBase]: For 2609595/2609598 co-relation queries the response was YES. [2024-06-21 16:16:24,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98316 conditions, 9529 events. 6256/9529 cut-off events. For 2609595/2609598 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 56364 event pairs, 1385 based on Foata normal form. 1/9527 useless extension candidates. Maximal degree in co-relation 98120. Up to 9367 conditions per place. [2024-06-21 16:16:24,856 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 493 selfloop transitions, 63 changer transitions 0/559 dead transitions. [2024-06-21 16:16:24,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 559 transitions, 7946 flow [2024-06-21 16:16:24,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:16:24,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:16:24,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 16:16:24,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-21 16:16:24,857 INFO L175 Difference]: Start difference. First operand has 410 places, 525 transitions, 6022 flow. Second operand 8 states and 143 transitions. [2024-06-21 16:16:24,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 559 transitions, 7946 flow [2024-06-21 16:16:30,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 559 transitions, 7794 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-21 16:16:30,253 INFO L231 Difference]: Finished difference. Result has 413 places, 534 transitions, 6242 flow [2024-06-21 16:16:30,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5870, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6242, PETRI_PLACES=413, PETRI_TRANSITIONS=534} [2024-06-21 16:16:30,253 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 369 predicate places. [2024-06-21 16:16:30,253 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 534 transitions, 6242 flow [2024-06-21 16:16:30,254 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 16:16:30,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:30,254 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 16:16:30,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 16:16:30,254 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:16:30,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:30,254 INFO L85 PathProgramCache]: Analyzing trace with hash 33375760, now seen corresponding path program 1 times [2024-06-21 16:16:30,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:30,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047420376] [2024-06-21 16:16:30,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:30,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:30,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:16:31,049 INFO 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 16:16:31,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:16:31,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047420376] [2024-06-21 16:16:31,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047420376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:16:31,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:16:31,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:16:31,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909220373] [2024-06-21 16:16:31,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:16:31,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:16:31,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:16:31,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:16:31,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:16:31,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 16:16:31,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 534 transitions, 6242 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 16:16:31,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:16:31,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 16:16:31,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:16:33,880 INFO L124 PetriNetUnfolderBase]: 6311/9605 cut-off events. [2024-06-21 16:16:33,881 INFO L125 PetriNetUnfolderBase]: For 2714003/2714006 co-relation queries the response was YES. [2024-06-21 16:16:33,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100610 conditions, 9605 events. 6311/9605 cut-off events. For 2714003/2714006 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 56829 event pairs, 1384 based on Foata normal form. 5/9607 useless extension candidates. Maximal degree in co-relation 100413. Up to 9411 conditions per place. [2024-06-21 16:16:34,027 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 514 selfloop transitions, 61 changer transitions 0/578 dead transitions. [2024-06-21 16:16:34,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 578 transitions, 8265 flow [2024-06-21 16:16:34,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:16:34,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:16:34,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 16:16:34,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-21 16:16:34,028 INFO L175 Difference]: Start difference. First operand has 413 places, 534 transitions, 6242 flow. Second operand 8 states and 146 transitions. [2024-06-21 16:16:34,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 578 transitions, 8265 flow [2024-06-21 16:16:38,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 578 transitions, 8079 flow, removed 75 selfloop flow, removed 3 redundant places. [2024-06-21 16:16:38,644 INFO L231 Difference]: Finished difference. Result has 419 places, 550 transitions, 6491 flow [2024-06-21 16:16:38,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6056, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6491, PETRI_PLACES=419, PETRI_TRANSITIONS=550} [2024-06-21 16:16:38,645 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 375 predicate places. [2024-06-21 16:16:38,645 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 550 transitions, 6491 flow [2024-06-21 16:16:38,645 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 16:16:38,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:38,645 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 16:16:38,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 16:16:38,646 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:16:38,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:38,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1442032800, now seen corresponding path program 4 times [2024-06-21 16:16:38,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:38,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583914414] [2024-06-21 16:16:38,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:38,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:38,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:16:39,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:16:39,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:16:39,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583914414] [2024-06-21 16:16:39,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583914414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:16:39,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:16:39,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:16:39,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185085249] [2024-06-21 16:16:39,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:16:39,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:16:39,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:16:39,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:16:39,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:16:39,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 16:16:39,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 550 transitions, 6491 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 16:16:39,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:16:39,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 16:16:39,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:16:42,389 INFO L124 PetriNetUnfolderBase]: 6316/9612 cut-off events. [2024-06-21 16:16:42,389 INFO L125 PetriNetUnfolderBase]: For 2731474/2731477 co-relation queries the response was YES. [2024-06-21 16:16:42,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100898 conditions, 9612 events. 6316/9612 cut-off events. For 2731474/2731477 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 56858 event pairs, 1390 based on Foata normal form. 3/9612 useless extension candidates. Maximal degree in co-relation 100698. Up to 9521 conditions per place. [2024-06-21 16:16:42,560 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 523 selfloop transitions, 47 changer transitions 0/573 dead transitions. [2024-06-21 16:16:42,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 573 transitions, 7758 flow [2024-06-21 16:16:42,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:16:42,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:16:42,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 16:16:42,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-21 16:16:42,561 INFO L175 Difference]: Start difference. First operand has 419 places, 550 transitions, 6491 flow. Second operand 8 states and 135 transitions. [2024-06-21 16:16:42,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 573 transitions, 7758 flow [2024-06-21 16:16:48,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 573 transitions, 7654 flow, removed 49 selfloop flow, removed 2 redundant places. [2024-06-21 16:16:48,570 INFO L231 Difference]: Finished difference. Result has 425 places, 553 transitions, 6570 flow [2024-06-21 16:16:48,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6387, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6570, PETRI_PLACES=425, PETRI_TRANSITIONS=553} [2024-06-21 16:16:48,570 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 381 predicate places. [2024-06-21 16:16:48,571 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 553 transitions, 6570 flow [2024-06-21 16:16:48,571 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 16:16:48,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:48,571 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 16:16:48,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 16:16:48,571 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:16:48,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:48,571 INFO L85 PathProgramCache]: Analyzing trace with hash 33375543, now seen corresponding path program 2 times [2024-06-21 16:16:48,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:48,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637489229] [2024-06-21 16:16:48,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:48,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:48,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:16:49,272 INFO 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 16:16:49,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:16:49,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637489229] [2024-06-21 16:16:49,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637489229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:16:49,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:16:49,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:16:49,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097451534] [2024-06-21 16:16:49,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:16:49,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:16:49,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:16:49,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:16:49,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:16:49,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 16:16:49,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 553 transitions, 6570 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 16:16:49,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:16:49,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 16:16:49,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:16:52,147 INFO L124 PetriNetUnfolderBase]: 6321/9619 cut-off events. [2024-06-21 16:16:52,147 INFO L125 PetriNetUnfolderBase]: For 2769911/2769914 co-relation queries the response was YES. [2024-06-21 16:16:52,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100965 conditions, 9619 events. 6321/9619 cut-off events. For 2769911/2769914 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 56907 event pairs, 1385 based on Foata normal form. 1/9617 useless extension candidates. Maximal degree in co-relation 100762. Up to 9456 conditions per place. [2024-06-21 16:16:52,330 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 511 selfloop transitions, 64 changer transitions 0/578 dead transitions. [2024-06-21 16:16:52,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 578 transitions, 8340 flow [2024-06-21 16:16:52,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:16:52,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:16:52,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 16:16:52,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-21 16:16:52,331 INFO L175 Difference]: Start difference. First operand has 425 places, 553 transitions, 6570 flow. Second operand 8 states and 141 transitions. [2024-06-21 16:16:52,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 578 transitions, 8340 flow [2024-06-21 16:16:58,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 578 transitions, 8194 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-21 16:16:58,597 INFO L231 Difference]: Finished difference. Result has 427 places, 556 transitions, 6596 flow [2024-06-21 16:16:58,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6424, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6596, PETRI_PLACES=427, PETRI_TRANSITIONS=556} [2024-06-21 16:16:58,598 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 383 predicate places. [2024-06-21 16:16:58,598 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 556 transitions, 6596 flow [2024-06-21 16:16:58,598 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 16:16:58,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:58,598 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 16:16:58,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-21 16:16:58,599 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:16:58,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:58,599 INFO L85 PathProgramCache]: Analyzing trace with hash -2005817316, now seen corresponding path program 5 times [2024-06-21 16:16:58,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:58,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621930187] [2024-06-21 16:16:58,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:58,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:58,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:16:59,561 INFO 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 16:16:59,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:16:59,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621930187] [2024-06-21 16:16:59,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621930187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:16:59,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:16:59,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:16:59,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33827929] [2024-06-21 16:16:59,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:16:59,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:16:59,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:16:59,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:16:59,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:16:59,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 16:16:59,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 556 transitions, 6596 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 16:16:59,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:16:59,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 16:16:59,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:02,485 INFO L124 PetriNetUnfolderBase]: 6342/9648 cut-off events. [2024-06-21 16:17:02,486 INFO L125 PetriNetUnfolderBase]: For 2827401/2827404 co-relation queries the response was YES. [2024-06-21 16:17:02,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101882 conditions, 9648 events. 6342/9648 cut-off events. For 2827401/2827404 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 57083 event pairs, 1386 based on Foata normal form. 3/9648 useless extension candidates. Maximal degree in co-relation 101678. Up to 9543 conditions per place. [2024-06-21 16:17:02,669 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 523 selfloop transitions, 58 changer transitions 0/584 dead transitions. [2024-06-21 16:17:02,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 584 transitions, 8320 flow [2024-06-21 16:17:02,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:17:02,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:17:02,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 16:17:02,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38953488372093026 [2024-06-21 16:17:02,670 INFO L175 Difference]: Start difference. First operand has 427 places, 556 transitions, 6596 flow. Second operand 8 states and 134 transitions. [2024-06-21 16:17:02,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 584 transitions, 8320 flow [2024-06-21 16:17:10,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 584 transitions, 8185 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 16:17:10,625 INFO L231 Difference]: Finished difference. Result has 431 places, 566 transitions, 6871 flow [2024-06-21 16:17:10,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6461, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6871, PETRI_PLACES=431, PETRI_TRANSITIONS=566} [2024-06-21 16:17:10,626 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 387 predicate places. [2024-06-21 16:17:10,626 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 566 transitions, 6871 flow [2024-06-21 16:17:10,626 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 16:17:10,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:10,626 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 16:17:10,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-21 16:17:10,626 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:17:10,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:10,627 INFO L85 PathProgramCache]: Analyzing trace with hash 2088210460, now seen corresponding path program 6 times [2024-06-21 16:17:10,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:10,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31263920] [2024-06-21 16:17:10,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:10,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:10,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:11,505 INFO 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 16:17:11,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:11,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31263920] [2024-06-21 16:17:11,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31263920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:11,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:11,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:17:11,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645448518] [2024-06-21 16:17:11,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:11,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:17:11,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:11,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:17:11,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:17:11,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 16:17:11,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 566 transitions, 6871 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 16:17:11,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:11,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 16:17:11,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:14,301 INFO L124 PetriNetUnfolderBase]: 6339/9644 cut-off events. [2024-06-21 16:17:14,302 INFO L125 PetriNetUnfolderBase]: For 2859273/2859276 co-relation queries the response was YES. [2024-06-21 16:17:14,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102019 conditions, 9644 events. 6339/9644 cut-off events. For 2859273/2859276 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 57083 event pairs, 1374 based on Foata normal form. 3/9644 useless extension candidates. Maximal degree in co-relation 101813. Up to 9553 conditions per place. [2024-06-21 16:17:14,459 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 533 selfloop transitions, 47 changer transitions 0/583 dead transitions. [2024-06-21 16:17:14,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 583 transitions, 8073 flow [2024-06-21 16:17:14,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:17:14,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:17:14,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 16:17:14,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-21 16:17:14,460 INFO L175 Difference]: Start difference. First operand has 431 places, 566 transitions, 6871 flow. Second operand 8 states and 132 transitions. [2024-06-21 16:17:14,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 583 transitions, 8073 flow [2024-06-21 16:17:22,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 583 transitions, 7897 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-21 16:17:22,019 INFO L231 Difference]: Finished difference. Result has 434 places, 566 transitions, 6795 flow [2024-06-21 16:17:22,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6695, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6795, PETRI_PLACES=434, PETRI_TRANSITIONS=566} [2024-06-21 16:17:22,020 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 390 predicate places. [2024-06-21 16:17:22,020 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 566 transitions, 6795 flow [2024-06-21 16:17:22,020 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 16:17:22,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:22,020 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 16:17:22,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-21 16:17:22,020 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:17:22,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:22,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1045139950, now seen corresponding path program 2 times [2024-06-21 16:17:22,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:22,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310145067] [2024-06-21 16:17:22,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:22,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:22,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:22,818 INFO 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 16:17:22,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:22,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310145067] [2024-06-21 16:17:22,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310145067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:22,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:22,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:17:22,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588386953] [2024-06-21 16:17:22,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:22,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:17:22,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:22,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:17:22,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:17:22,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 16:17:22,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 566 transitions, 6795 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 16:17:22,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:22,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 16:17:22,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:25,515 INFO L124 PetriNetUnfolderBase]: 6402/9731 cut-off events. [2024-06-21 16:17:25,515 INFO L125 PetriNetUnfolderBase]: For 2974503/2974506 co-relation queries the response was YES. [2024-06-21 16:17:25,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103873 conditions, 9731 events. 6402/9731 cut-off events. For 2974503/2974506 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 57585 event pairs, 1380 based on Foata normal form. 5/9733 useless extension candidates. Maximal degree in co-relation 103666. Up to 9506 conditions per place. [2024-06-21 16:17:25,674 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 532 selfloop transitions, 68 changer transitions 0/603 dead transitions. [2024-06-21 16:17:25,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 603 transitions, 9089 flow [2024-06-21 16:17:25,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:17:25,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:17:25,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 16:17:25,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-21 16:17:25,676 INFO L175 Difference]: Start difference. First operand has 434 places, 566 transitions, 6795 flow. Second operand 8 states and 147 transitions. [2024-06-21 16:17:25,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 603 transitions, 9089 flow [2024-06-21 16:17:33,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 603 transitions, 8945 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-21 16:17:33,417 INFO L231 Difference]: Finished difference. Result has 436 places, 575 transitions, 6989 flow [2024-06-21 16:17:33,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6651, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6989, PETRI_PLACES=436, PETRI_TRANSITIONS=575} [2024-06-21 16:17:33,417 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 392 predicate places. [2024-06-21 16:17:33,417 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 575 transitions, 6989 flow [2024-06-21 16:17:33,417 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 16:17:33,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:33,417 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 16:17:33,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-21 16:17:33,418 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:17:33,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:33,418 INFO L85 PathProgramCache]: Analyzing trace with hash -2005667369, now seen corresponding path program 3 times [2024-06-21 16:17:33,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:33,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519892989] [2024-06-21 16:17:33,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:33,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:33,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:34,132 INFO 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 16:17:34,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:34,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519892989] [2024-06-21 16:17:34,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519892989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:34,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:34,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:17:34,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385887650] [2024-06-21 16:17:34,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:34,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:17:34,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:34,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:17:34,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:17:34,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 16:17:34,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 575 transitions, 6989 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 16:17:34,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:34,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 16:17:34,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:37,198 INFO L124 PetriNetUnfolderBase]: 6415/9749 cut-off events. [2024-06-21 16:17:37,199 INFO L125 PetriNetUnfolderBase]: For 3006289/3006292 co-relation queries the response was YES. [2024-06-21 16:17:37,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104558 conditions, 9749 events. 6415/9749 cut-off events. For 3006289/3006292 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 57671 event pairs, 1405 based on Foata normal form. 1/9747 useless extension candidates. Maximal degree in co-relation 104350. Up to 9583 conditions per place. [2024-06-21 16:17:37,406 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 525 selfloop transitions, 72 changer transitions 0/600 dead transitions. [2024-06-21 16:17:37,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 600 transitions, 8870 flow [2024-06-21 16:17:37,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:17:37,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:17:37,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 16:17:37,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-21 16:17:37,408 INFO L175 Difference]: Start difference. First operand has 436 places, 575 transitions, 6989 flow. Second operand 8 states and 137 transitions. [2024-06-21 16:17:37,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 600 transitions, 8870 flow [2024-06-21 16:17:44,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 600 transitions, 8728 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-21 16:17:44,550 INFO L231 Difference]: Finished difference. Result has 441 places, 581 transitions, 7094 flow [2024-06-21 16:17:44,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6847, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7094, PETRI_PLACES=441, PETRI_TRANSITIONS=581} [2024-06-21 16:17:44,551 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 397 predicate places. [2024-06-21 16:17:44,551 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 581 transitions, 7094 flow [2024-06-21 16:17:44,551 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 16:17:44,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:44,551 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 16:17:44,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-21 16:17:44,551 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:17:44,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:44,552 INFO L85 PathProgramCache]: Analyzing trace with hash 240296110, now seen corresponding path program 3 times [2024-06-21 16:17:44,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:44,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222671754] [2024-06-21 16:17:44,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:44,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:44,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:45,356 INFO 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 16:17:45,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:45,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222671754] [2024-06-21 16:17:45,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222671754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:45,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:45,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:17:45,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523477727] [2024-06-21 16:17:45,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:45,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:17:45,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:45,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:17:45,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:17:45,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 16:17:45,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 581 transitions, 7094 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 16:17:45,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:45,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 16:17:45,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:48,183 INFO L124 PetriNetUnfolderBase]: 6406/9737 cut-off events. [2024-06-21 16:17:48,183 INFO L125 PetriNetUnfolderBase]: For 3038236/3038239 co-relation queries the response was YES. [2024-06-21 16:17:48,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104116 conditions, 9737 events. 6406/9737 cut-off events. For 3038236/3038239 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 57595 event pairs, 1380 based on Foata normal form. 5/9739 useless extension candidates. Maximal degree in co-relation 103907. Up to 9517 conditions per place. [2024-06-21 16:17:48,337 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 533 selfloop transitions, 70 changer transitions 0/606 dead transitions. [2024-06-21 16:17:48,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 606 transitions, 8924 flow [2024-06-21 16:17:48,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:17:48,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:17:48,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 16:17:48,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-21 16:17:48,338 INFO L175 Difference]: Start difference. First operand has 441 places, 581 transitions, 7094 flow. Second operand 8 states and 143 transitions. [2024-06-21 16:17:48,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 606 transitions, 8924 flow [2024-06-21 16:17:55,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 606 transitions, 8780 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-21 16:17:55,655 INFO L231 Difference]: Finished difference. Result has 445 places, 581 transitions, 7096 flow [2024-06-21 16:17:55,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6950, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7096, PETRI_PLACES=445, PETRI_TRANSITIONS=581} [2024-06-21 16:17:55,656 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 401 predicate places. [2024-06-21 16:17:55,656 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 581 transitions, 7096 flow [2024-06-21 16:17:55,656 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 16:17:55,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:55,656 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 16:17:55,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-21 16:17:55,657 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:17:55,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:55,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1163148884, now seen corresponding path program 2 times [2024-06-21 16:17:55,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:55,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117289704] [2024-06-21 16:17:55,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:55,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:55,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:57,456 INFO 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 16:17:57,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:57,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117289704] [2024-06-21 16:17:57,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117289704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:57,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:57,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:17:57,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254424225] [2024-06-21 16:17:57,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:57,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:17:57,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:57,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:17:57,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:17:57,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:17:57,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 581 transitions, 7096 flow. Second operand has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states 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 16:17:57,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:57,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:17:57,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:00,554 INFO L124 PetriNetUnfolderBase]: 6315/9656 cut-off events. [2024-06-21 16:18:00,554 INFO L125 PetriNetUnfolderBase]: For 3090172/3090175 co-relation queries the response was YES. [2024-06-21 16:18:00,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104317 conditions, 9656 events. 6315/9656 cut-off events. For 3090172/3090175 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 57783 event pairs, 1205 based on Foata normal form. 4/9657 useless extension candidates. Maximal degree in co-relation 104107. Up to 8987 conditions per place. [2024-06-21 16:18:00,710 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 515 selfloop transitions, 71 changer transitions 0/636 dead transitions. [2024-06-21 16:18:00,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 636 transitions, 8662 flow [2024-06-21 16:18:00,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:18:00,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:18:00,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 210 transitions. [2024-06-21 16:18:00,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4439746300211416 [2024-06-21 16:18:00,712 INFO L175 Difference]: Start difference. First operand has 445 places, 581 transitions, 7096 flow. Second operand 11 states and 210 transitions. [2024-06-21 16:18:00,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 636 transitions, 8662 flow [2024-06-21 16:18:07,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 636 transitions, 8516 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 16:18:07,579 INFO L231 Difference]: Finished difference. Result has 452 places, 591 transitions, 7382 flow [2024-06-21 16:18:07,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6950, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7382, PETRI_PLACES=452, PETRI_TRANSITIONS=591} [2024-06-21 16:18:07,580 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 408 predicate places. [2024-06-21 16:18:07,580 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 591 transitions, 7382 flow [2024-06-21 16:18:07,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states 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 16:18:07,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:07,580 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 16:18:07,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-21 16:18:07,581 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:18:07,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:07,581 INFO L85 PathProgramCache]: Analyzing trace with hash 987915822, now seen corresponding path program 3 times [2024-06-21 16:18:07,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:07,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631275345] [2024-06-21 16:18:07,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:07,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:07,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:09,107 INFO 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 16:18:09,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:09,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631275345] [2024-06-21 16:18:09,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631275345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:09,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:09,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:18:09,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103783205] [2024-06-21 16:18:09,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:09,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:18:09,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:09,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:18:09,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:18:09,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:18:09,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 591 transitions, 7382 flow. Second operand has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states 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 16:18:09,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:09,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:18:09,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:12,409 INFO L124 PetriNetUnfolderBase]: 6372/9743 cut-off events. [2024-06-21 16:18:12,409 INFO L125 PetriNetUnfolderBase]: For 3146692/3146695 co-relation queries the response was YES. [2024-06-21 16:18:12,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106123 conditions, 9743 events. 6372/9743 cut-off events. For 3146692/3146695 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 58379 event pairs, 1233 based on Foata normal form. 4/9744 useless extension candidates. Maximal degree in co-relation 105910. Up to 9188 conditions per place. [2024-06-21 16:18:12,568 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 537 selfloop transitions, 56 changer transitions 0/643 dead transitions. [2024-06-21 16:18:12,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 643 transitions, 8919 flow [2024-06-21 16:18:12,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:18:12,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:18:12,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 207 transitions. [2024-06-21 16:18:12,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4376321353065539 [2024-06-21 16:18:12,569 INFO L175 Difference]: Start difference. First operand has 452 places, 591 transitions, 7382 flow. Second operand 11 states and 207 transitions. [2024-06-21 16:18:12,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 643 transitions, 8919 flow