./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix010.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/mix010.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de 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/mix010.opt.i ./goblint.2024-06-19_11-23-25.files/protection/mix010.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 19:55:04,449 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 19:55:04,495 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 19:55:04,499 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 19:55:04,501 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 19:55:04,516 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 19:55:04,516 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 19:55:04,517 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 19:55:04,517 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 19:55:04,517 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 19:55:04,518 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 19:55:04,518 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 19:55:04,518 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 19:55:04,519 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 19:55:04,519 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 19:55:04,519 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 19:55:04,520 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 19:55:04,520 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 19:55:04,520 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 19:55:04,520 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 19:55:04,521 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 19:55:04,521 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 19:55:04,521 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 19:55:04,522 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 19:55:04,522 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 19:55:04,522 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 19:55:04,522 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 19:55:04,522 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 19:55:04,523 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 19:55:04,523 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 19:55:04,523 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 19:55:04,523 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 19:55:04,524 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:55:04,524 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 19:55:04,524 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 19:55:04,524 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 19:55:04,524 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 19:55:04,525 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 19:55:04,525 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 19:55:04,525 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 19:55:04,525 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 19:55:04,526 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 19:55:04,526 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 19:55:04,526 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 19:55:04,740 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 19:55:04,761 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 19:55:04,764 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 19:55:04,765 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 19:55:04,766 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 19:55:04,767 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix010.opt.i [2024-06-27 19:55:05,757 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 19:55:05,978 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 19:55:05,979 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix010.opt.i [2024-06-27 19:55:05,990 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/089b52150/39efb12c94014a2dbefdf3082dc9894b/FLAG57857d17c [2024-06-27 19:55:06,000 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/089b52150/39efb12c94014a2dbefdf3082dc9894b [2024-06-27 19:55:06,013 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 19:55:06,024 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 19:55:06,024 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix010.opt.yml/witness.yml [2024-06-27 19:55:06,201 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 19:55:06,202 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 19:55:06,202 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 19:55:06,202 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 19:55:06,207 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 19:55:06,207 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:55:06" (1/2) ... [2024-06-27 19:55:06,208 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@388db114 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:55:06, skipping insertion in model container [2024-06-27 19:55:06,208 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:55:06" (1/2) ... [2024-06-27 19:55:06,209 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@170c899a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:55:06, skipping insertion in model container [2024-06-27 19:55:06,209 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:55:06" (2/2) ... [2024-06-27 19:55:06,210 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@388db114 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:55:06, skipping insertion in model container [2024-06-27 19:55:06,210 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:55:06" (2/2) ... [2024-06-27 19:55:06,210 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 19:55:06,272 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 19:55:06,274 INFO L97 edCorrectnessWitness]: Location invariant before [L858-L858] (((((((((((((((((((((! multithreaded || (x == 0 || x == 1)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) [2024-06-27 19:55:06,274 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] (((((((((((((((((((((! multithreaded || (x == 0 || x == 1)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) [2024-06-27 19:55:06,275 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] (((((((((((((((((((((! multithreaded || (x == 0 || x == 1)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) [2024-06-27 19:55:06,275 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 19:55:06,275 INFO L106 edCorrectnessWitness]: ghost_update [L854-L854] multithreaded = 1; [2024-06-27 19:55:06,312 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 19:55:06,563 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:55:06,577 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 19:55:06,698 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:55:06,732 INFO L206 MainTranslator]: Completed translation [2024-06-27 19:55:06,733 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:55:06 WrapperNode [2024-06-27 19:55:06,733 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 19:55:06,734 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 19:55:06,734 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 19:55:06,734 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 19:55:06,739 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 27.06 07:55:06" (1/1) ... [2024-06-27 19:55:06,751 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 27.06 07:55:06" (1/1) ... [2024-06-27 19:55:06,785 INFO L138 Inliner]: procedures = 175, calls = 49, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 151 [2024-06-27 19:55:06,786 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 19:55:06,786 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 19:55:06,786 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 19:55:06,786 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 19:55:06,798 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:55:06" (1/1) ... [2024-06-27 19:55:06,798 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:55:06" (1/1) ... [2024-06-27 19:55:06,803 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:55:06" (1/1) ... [2024-06-27 19:55:06,816 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]. [2024-06-27 19:55:06,817 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:55:06" (1/1) ... [2024-06-27 19:55:06,817 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:55:06" (1/1) ... [2024-06-27 19:55:06,823 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:55:06" (1/1) ... [2024-06-27 19:55:06,825 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:55:06" (1/1) ... [2024-06-27 19:55:06,826 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:55:06" (1/1) ... [2024-06-27 19:55:06,827 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:55:06" (1/1) ... [2024-06-27 19:55:06,830 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 19:55:06,830 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 19:55:06,831 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 19:55:06,831 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 19:55:06,831 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:55:06" (1/1) ... [2024-06-27 19:55:06,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:55:06,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 19:55:06,866 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) [2024-06-27 19:55:06,884 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 [2024-06-27 19:55:06,899 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 19:55:06,899 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 19:55:06,900 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 19:55:06,900 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 19:55:06,900 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 19:55:06,900 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 19:55:06,900 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 19:55:06,901 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 19:55:06,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 19:55:06,901 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 19:55:06,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 19:55:06,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 19:55:06,902 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 19:55:07,024 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 19:55:07,026 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 19:55:07,326 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 19:55:07,326 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 19:55:07,501 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 19:55:07,502 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 19:55:07,502 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:55:07 BoogieIcfgContainer [2024-06-27 19:55:07,502 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 19:55:07,505 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 19:55:07,505 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 19:55:07,507 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 19:55:07,508 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 07:55:06" (1/4) ... [2024-06-27 19:55:07,508 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a25a768 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 07:55:07, skipping insertion in model container [2024-06-27 19:55:07,508 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:55:06" (2/4) ... [2024-06-27 19:55:07,508 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a25a768 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 07:55:07, skipping insertion in model container [2024-06-27 19:55:07,509 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:55:06" (3/4) ... [2024-06-27 19:55:07,509 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a25a768 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 07:55:07, skipping insertion in model container [2024-06-27 19:55:07,510 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:55:07" (4/4) ... [2024-06-27 19:55:07,511 INFO L112 eAbstractionObserver]: Analyzing ICFG mix010.opt.i [2024-06-27 19:55:07,526 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 19:55:07,527 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 19:55:07,527 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 19:55:07,576 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 19:55:07,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-27 19:55:07,641 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-27 19:55:07,642 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:55:07,643 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 73 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. [2024-06-27 19:55:07,643 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-27 19:55:07,645 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-27 19:55:07,652 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 19:55:07,657 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;@e888a67, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 19:55:07,657 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 19:55:07,660 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 19:55:07,660 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 19:55:07,660 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:55:07,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:07,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 19:55:07,661 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)] === [2024-06-27 19:55:07,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:07,665 INFO L85 PathProgramCache]: Analyzing trace with hash 402657065, now seen corresponding path program 1 times [2024-06-27 19:55:07,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:07,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096043206] [2024-06-27 19:55:07,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:07,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:07,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:08,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:08,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:08,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096043206] [2024-06-27 19:55:08,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096043206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:08,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:08,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 19:55:08,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373526757] [2024-06-27 19:55:08,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:08,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 19:55:08,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:08,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 19:55:08,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 19:55:08,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-27 19:55:08,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:08,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:08,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-27 19:55:08,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:09,107 INFO L124 PetriNetUnfolderBase]: 1059/1701 cut-off events. [2024-06-27 19:55:09,108 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-06-27 19:55:09,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3365 conditions, 1701 events. 1059/1701 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8888 event pairs, 698 based on Foata normal form. 1/1644 useless extension candidates. Maximal degree in co-relation 3353. Up to 1593 conditions per place. [2024-06-27 19:55:09,123 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 31 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-27 19:55:09,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 173 flow [2024-06-27 19:55:09,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 19:55:09,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 19:55:09,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2024-06-27 19:55:09,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6434108527131783 [2024-06-27 19:55:09,135 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 83 transitions. [2024-06-27 19:55:09,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 173 flow [2024-06-27 19:55:09,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 168 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 19:55:09,141 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-27 19:55:09,143 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} [2024-06-27 19:55:09,145 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-27 19:55:09,145 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-27 19:55:09,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:09,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:09,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:09,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 19:55:09,146 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)] === [2024-06-27 19:55:09,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:09,147 INFO L85 PathProgramCache]: Analyzing trace with hash 407527642, now seen corresponding path program 1 times [2024-06-27 19:55:09,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:09,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579776408] [2024-06-27 19:55:09,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:09,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:09,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:09,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:09,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:09,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579776408] [2024-06-27 19:55:09,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579776408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:09,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:09,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 19:55:09,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056248264] [2024-06-27 19:55:09,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:09,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:55:09,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:09,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:55:09,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:55:09,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2024-06-27 19:55:09,881 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) [2024-06-27 19:55:09,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:09,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2024-06-27 19:55:09,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:10,110 INFO L124 PetriNetUnfolderBase]: 1215/1890 cut-off events. [2024-06-27 19:55:10,111 INFO L125 PetriNetUnfolderBase]: For 393/393 co-relation queries the response was YES. [2024-06-27 19:55:10,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4301 conditions, 1890 events. 1215/1890 cut-off events. For 393/393 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9639 event pairs, 648 based on Foata normal form. 3/1888 useless extension candidates. Maximal degree in co-relation 4289. Up to 1803 conditions per place. [2024-06-27 19:55:10,122 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 39 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-27 19:55:10,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 242 flow [2024-06-27 19:55:10,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:55:10,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:55:10,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-06-27 19:55:10,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6104651162790697 [2024-06-27 19:55:10,124 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 105 transitions. [2024-06-27 19:55:10,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 242 flow [2024-06-27 19:55:10,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 19:55:10,126 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-27 19:55:10,127 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} [2024-06-27 19:55:10,127 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-27 19:55:10,127 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-27 19:55:10,128 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) [2024-06-27 19:55:10,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:10,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:10,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 19:55:10,128 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)] === [2024-06-27 19:55:10,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:10,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1215866847, now seen corresponding path program 1 times [2024-06-27 19:55:10,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:10,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383039098] [2024-06-27 19:55:10,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:10,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:10,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:11,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:11,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:11,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383039098] [2024-06-27 19:55:11,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383039098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:11,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:11,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:55:11,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700257497] [2024-06-27 19:55:11,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:11,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:55:11,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:11,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:55:11,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:55:11,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-27 19:55:11,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:11,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:11,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-27 19:55:11,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:11,523 INFO L124 PetriNetUnfolderBase]: 1545/2363 cut-off events. [2024-06-27 19:55:11,524 INFO L125 PetriNetUnfolderBase]: For 1295/1295 co-relation queries the response was YES. [2024-06-27 19:55:11,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5935 conditions, 2363 events. 1545/2363 cut-off events. For 1295/1295 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11699 event pairs, 575 based on Foata normal form. 6/2358 useless extension candidates. Maximal degree in co-relation 5921. Up to 2233 conditions per place. [2024-06-27 19:55:11,535 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 51 selfloop transitions, 12 changer transitions 0/70 dead transitions. [2024-06-27 19:55:11,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 70 transitions, 354 flow [2024-06-27 19:55:11,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:55:11,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:55:11,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-27 19:55:11,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5581395348837209 [2024-06-27 19:55:11,539 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 6 states and 144 transitions. [2024-06-27 19:55:11,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 70 transitions, 354 flow [2024-06-27 19:55:11,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 70 transitions, 334 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 19:55:11,543 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 183 flow [2024-06-27 19:55:11,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=183, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-06-27 19:55:11,544 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 7 predicate places. [2024-06-27 19:55:11,544 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 183 flow [2024-06-27 19:55:11,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:11,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:11,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:11,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 19:55:11,545 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)] === [2024-06-27 19:55:11,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:11,546 INFO L85 PathProgramCache]: Analyzing trace with hash -532318793, now seen corresponding path program 1 times [2024-06-27 19:55:11,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:11,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128582733] [2024-06-27 19:55:11,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:11,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:11,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:12,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:12,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:12,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128582733] [2024-06-27 19:55:12,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128582733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:12,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:12,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:55:12,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200457058] [2024-06-27 19:55:12,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:12,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:55:12,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:12,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:55:12,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:55:12,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:55:12,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 183 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:12,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:12,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:55:12,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:12,533 INFO L124 PetriNetUnfolderBase]: 1333/2109 cut-off events. [2024-06-27 19:55:12,534 INFO L125 PetriNetUnfolderBase]: For 2120/2120 co-relation queries the response was YES. [2024-06-27 19:55:12,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5763 conditions, 2109 events. 1333/2109 cut-off events. For 2120/2120 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10706 event pairs, 592 based on Foata normal form. 2/2080 useless extension candidates. Maximal degree in co-relation 5746. Up to 1980 conditions per place. [2024-06-27 19:55:12,544 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 43 selfloop transitions, 8 changer transitions 0/58 dead transitions. [2024-06-27 19:55:12,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 58 transitions, 327 flow [2024-06-27 19:55:12,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:55:12,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:55:12,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 105 transitions. [2024-06-27 19:55:12,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-27 19:55:12,545 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 183 flow. Second operand 5 states and 105 transitions. [2024-06-27 19:55:12,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 58 transitions, 327 flow [2024-06-27 19:55:12,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 58 transitions, 300 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 19:55:12,548 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 200 flow [2024-06-27 19:55:12,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=200, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2024-06-27 19:55:12,548 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 9 predicate places. [2024-06-27 19:55:12,549 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 200 flow [2024-06-27 19:55:12,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:12,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:12,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:12,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 19:55:12,549 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:55:12,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:12,550 INFO L85 PathProgramCache]: Analyzing trace with hash 709268787, now seen corresponding path program 1 times [2024-06-27 19:55:12,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:12,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475561907] [2024-06-27 19:55:12,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:12,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:12,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:13,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:13,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:13,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475561907] [2024-06-27 19:55:13,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475561907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:13,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:13,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:55:13,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163466946] [2024-06-27 19:55:13,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:13,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:55:13,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:13,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:55:13,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:55:13,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:55:13,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 200 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 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) [2024-06-27 19:55:13,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:13,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:55:13,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:13,736 INFO L124 PetriNetUnfolderBase]: 1571/2467 cut-off events. [2024-06-27 19:55:13,737 INFO L125 PetriNetUnfolderBase]: For 3658/3658 co-relation queries the response was YES. [2024-06-27 19:55:13,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7210 conditions, 2467 events. 1571/2467 cut-off events. For 3658/3658 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12540 event pairs, 706 based on Foata normal form. 2/2460 useless extension candidates. Maximal degree in co-relation 7191. Up to 2317 conditions per place. [2024-06-27 19:55:13,750 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 48 selfloop transitions, 11 changer transitions 0/65 dead transitions. [2024-06-27 19:55:13,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 65 transitions, 374 flow [2024-06-27 19:55:13,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:55:13,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:55:13,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-27 19:55:13,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46124031007751937 [2024-06-27 19:55:13,751 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 200 flow. Second operand 6 states and 119 transitions. [2024-06-27 19:55:13,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 65 transitions, 374 flow [2024-06-27 19:55:13,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 65 transitions, 354 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 19:55:13,754 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 234 flow [2024-06-27 19:55:13,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=234, PETRI_PLACES=56, PETRI_TRANSITIONS=50} [2024-06-27 19:55:13,755 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 12 predicate places. [2024-06-27 19:55:13,755 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 234 flow [2024-06-27 19:55:13,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 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) [2024-06-27 19:55:13,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:13,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:13,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 19:55:13,760 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)] === [2024-06-27 19:55:13,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:13,761 INFO L85 PathProgramCache]: Analyzing trace with hash 538200428, now seen corresponding path program 1 times [2024-06-27 19:55:13,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:13,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369668385] [2024-06-27 19:55:13,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:13,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:13,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:14,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:14,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:14,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369668385] [2024-06-27 19:55:14,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369668385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:14,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:14,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:55:14,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207700861] [2024-06-27 19:55:14,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:14,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:55:14,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:14,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:55:14,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:55:14,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:55:14,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 234 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 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) [2024-06-27 19:55:14,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:14,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:55:14,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:15,034 INFO L124 PetriNetUnfolderBase]: 1717/2637 cut-off events. [2024-06-27 19:55:15,035 INFO L125 PetriNetUnfolderBase]: For 6206/6212 co-relation queries the response was YES. [2024-06-27 19:55:15,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8440 conditions, 2637 events. 1717/2637 cut-off events. For 6206/6212 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 13148 event pairs, 749 based on Foata normal form. 6/2636 useless extension candidates. Maximal degree in co-relation 8420. Up to 2498 conditions per place. [2024-06-27 19:55:15,047 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 53 selfloop transitions, 16 changer transitions 0/76 dead transitions. [2024-06-27 19:55:15,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 76 transitions, 482 flow [2024-06-27 19:55:15,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:55:15,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:55:15,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-06-27 19:55:15,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-27 19:55:15,049 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 234 flow. Second operand 6 states and 126 transitions. [2024-06-27 19:55:15,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 76 transitions, 482 flow [2024-06-27 19:55:15,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 76 transitions, 452 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 19:55:15,052 INFO L231 Difference]: Finished difference. Result has 58 places, 56 transitions, 290 flow [2024-06-27 19:55:15,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=290, PETRI_PLACES=58, PETRI_TRANSITIONS=56} [2024-06-27 19:55:15,052 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2024-06-27 19:55:15,052 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 56 transitions, 290 flow [2024-06-27 19:55:15,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 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) [2024-06-27 19:55:15,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:15,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:15,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 19:55:15,053 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)] === [2024-06-27 19:55:15,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:15,053 INFO L85 PathProgramCache]: Analyzing trace with hash 544663928, now seen corresponding path program 2 times [2024-06-27 19:55:15,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:15,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780286739] [2024-06-27 19:55:15,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:15,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:15,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:15,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:15,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:15,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780286739] [2024-06-27 19:55:15,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780286739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:15,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:15,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:55:15,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84355314] [2024-06-27 19:55:15,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:15,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:55:15,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:15,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:55:15,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:55:15,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:55:15,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 56 transitions, 290 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 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) [2024-06-27 19:55:15,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:15,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:55:15,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:16,271 INFO L124 PetriNetUnfolderBase]: 1712/2631 cut-off events. [2024-06-27 19:55:16,271 INFO L125 PetriNetUnfolderBase]: For 8385/8390 co-relation queries the response was YES. [2024-06-27 19:55:16,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9042 conditions, 2631 events. 1712/2631 cut-off events. For 8385/8390 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 13120 event pairs, 752 based on Foata normal form. 6/2630 useless extension candidates. Maximal degree in co-relation 9021. Up to 2493 conditions per place. [2024-06-27 19:55:16,290 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 48 selfloop transitions, 16 changer transitions 0/71 dead transitions. [2024-06-27 19:55:16,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 71 transitions, 456 flow [2024-06-27 19:55:16,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:55:16,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:55:16,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-27 19:55:16,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4689922480620155 [2024-06-27 19:55:16,292 INFO L175 Difference]: Start difference. First operand has 58 places, 56 transitions, 290 flow. Second operand 6 states and 121 transitions. [2024-06-27 19:55:16,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 71 transitions, 456 flow [2024-06-27 19:55:16,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 71 transitions, 422 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-27 19:55:16,297 INFO L231 Difference]: Finished difference. Result has 62 places, 56 transitions, 296 flow [2024-06-27 19:55:16,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=296, PETRI_PLACES=62, PETRI_TRANSITIONS=56} [2024-06-27 19:55:16,299 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 18 predicate places. [2024-06-27 19:55:16,299 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 56 transitions, 296 flow [2024-06-27 19:55:16,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 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) [2024-06-27 19:55:16,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:16,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:16,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 19:55:16,299 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)] === [2024-06-27 19:55:16,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:16,300 INFO L85 PathProgramCache]: Analyzing trace with hash 512497584, now seen corresponding path program 1 times [2024-06-27 19:55:16,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:16,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134585386] [2024-06-27 19:55:16,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:16,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:16,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:17,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:17,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:17,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134585386] [2024-06-27 19:55:17,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134585386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:17,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:17,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:55:17,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392721056] [2024-06-27 19:55:17,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:17,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:55:17,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:17,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:55:17,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:55:17,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:55:17,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 56 transitions, 296 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:17,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:17,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:55:17,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:17,621 INFO L124 PetriNetUnfolderBase]: 1567/2474 cut-off events. [2024-06-27 19:55:17,621 INFO L125 PetriNetUnfolderBase]: For 8128/8128 co-relation queries the response was YES. [2024-06-27 19:55:17,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8429 conditions, 2474 events. 1567/2474 cut-off events. For 8128/8128 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12587 event pairs, 652 based on Foata normal form. 4/2467 useless extension candidates. Maximal degree in co-relation 8406. Up to 2294 conditions per place. [2024-06-27 19:55:17,631 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 59 selfloop transitions, 14 changer transitions 0/79 dead transitions. [2024-06-27 19:55:17,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 79 transitions, 516 flow [2024-06-27 19:55:17,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:55:17,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:55:17,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-27 19:55:17,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584717607973422 [2024-06-27 19:55:17,633 INFO L175 Difference]: Start difference. First operand has 62 places, 56 transitions, 296 flow. Second operand 7 states and 138 transitions. [2024-06-27 19:55:17,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 79 transitions, 516 flow [2024-06-27 19:55:17,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 79 transitions, 472 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 19:55:17,639 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 318 flow [2024-06-27 19:55:17,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=318, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2024-06-27 19:55:17,640 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 19 predicate places. [2024-06-27 19:55:17,640 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 318 flow [2024-06-27 19:55:17,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:17,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:17,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:17,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 19:55:17,641 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)] === [2024-06-27 19:55:17,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:17,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1294959864, now seen corresponding path program 1 times [2024-06-27 19:55:17,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:17,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565602265] [2024-06-27 19:55:17,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:17,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:17,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:18,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:18,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:18,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565602265] [2024-06-27 19:55:18,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565602265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:18,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:18,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:55:18,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816880176] [2024-06-27 19:55:18,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:18,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:55:18,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:18,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:55:18,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:55:18,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:55:18,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 318 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:18,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:18,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:55:18,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:18,944 INFO L124 PetriNetUnfolderBase]: 1713/2636 cut-off events. [2024-06-27 19:55:18,944 INFO L125 PetriNetUnfolderBase]: For 12167/12167 co-relation queries the response was YES. [2024-06-27 19:55:18,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9757 conditions, 2636 events. 1713/2636 cut-off events. For 12167/12167 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 13140 event pairs, 700 based on Foata normal form. 2/2637 useless extension candidates. Maximal degree in co-relation 9734. Up to 2498 conditions per place. [2024-06-27 19:55:18,956 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 66 selfloop transitions, 14 changer transitions 0/87 dead transitions. [2024-06-27 19:55:18,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 87 transitions, 568 flow [2024-06-27 19:55:18,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:55:18,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:55:18,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-27 19:55:18,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4750830564784053 [2024-06-27 19:55:18,958 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 318 flow. Second operand 7 states and 143 transitions. [2024-06-27 19:55:18,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 87 transitions, 568 flow [2024-06-27 19:55:18,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 87 transitions, 526 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 19:55:18,964 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 344 flow [2024-06-27 19:55:18,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=344, PETRI_PLACES=65, PETRI_TRANSITIONS=62} [2024-06-27 19:55:18,965 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 21 predicate places. [2024-06-27 19:55:18,965 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 344 flow [2024-06-27 19:55:18,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:18,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:18,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:18,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 19:55:18,966 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)] === [2024-06-27 19:55:18,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:18,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1465657458, now seen corresponding path program 1 times [2024-06-27 19:55:18,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:18,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774352970] [2024-06-27 19:55:18,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:18,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:18,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:19,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:19,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:19,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774352970] [2024-06-27 19:55:19,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774352970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:19,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:19,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:55:19,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535512647] [2024-06-27 19:55:19,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:19,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:55:19,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:19,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:55:19,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:55:19,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:55:19,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 344 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) [2024-06-27 19:55:19,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:19,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:55:19,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:20,269 INFO L124 PetriNetUnfolderBase]: 1833/2763 cut-off events. [2024-06-27 19:55:20,269 INFO L125 PetriNetUnfolderBase]: For 15115/15121 co-relation queries the response was YES. [2024-06-27 19:55:20,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10757 conditions, 2763 events. 1833/2763 cut-off events. For 15115/15121 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 13400 event pairs, 752 based on Foata normal form. 6/2766 useless extension candidates. Maximal degree in co-relation 10733. Up to 2635 conditions per place. [2024-06-27 19:55:20,282 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 64 selfloop transitions, 23 changer transitions 0/92 dead transitions. [2024-06-27 19:55:20,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 92 transitions, 666 flow [2024-06-27 19:55:20,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:55:20,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:55:20,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-27 19:55:20,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 19:55:20,283 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 344 flow. Second operand 7 states and 140 transitions. [2024-06-27 19:55:20,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 92 transitions, 666 flow [2024-06-27 19:55:20,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 92 transitions, 622 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 19:55:20,289 INFO L231 Difference]: Finished difference. Result has 67 places, 68 transitions, 412 flow [2024-06-27 19:55:20,289 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=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=412, PETRI_PLACES=67, PETRI_TRANSITIONS=68} [2024-06-27 19:55:20,290 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 23 predicate places. [2024-06-27 19:55:20,290 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 68 transitions, 412 flow [2024-06-27 19:55:20,290 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) [2024-06-27 19:55:20,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:20,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:20,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 19:55:20,291 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)] === [2024-06-27 19:55:20,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:20,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1465657644, now seen corresponding path program 2 times [2024-06-27 19:55:20,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:20,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431519497] [2024-06-27 19:55:20,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:20,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:20,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:20,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:20,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:20,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431519497] [2024-06-27 19:55:20,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431519497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:20,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:20,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:55:20,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206391173] [2024-06-27 19:55:20,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:20,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:55:20,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:20,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:55:20,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:55:21,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:55:21,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 68 transitions, 412 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:21,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:21,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:55:21,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:21,652 INFO L124 PetriNetUnfolderBase]: 1739/2682 cut-off events. [2024-06-27 19:55:21,652 INFO L125 PetriNetUnfolderBase]: For 18580/18583 co-relation queries the response was YES. [2024-06-27 19:55:21,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11032 conditions, 2682 events. 1739/2682 cut-off events. For 18580/18583 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 13446 event pairs, 696 based on Foata normal form. 4/2684 useless extension candidates. Maximal degree in co-relation 11007. Up to 2481 conditions per place. [2024-06-27 19:55:21,667 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 63 selfloop transitions, 26 changer transitions 0/98 dead transitions. [2024-06-27 19:55:21,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 98 transitions, 758 flow [2024-06-27 19:55:21,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:55:21,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:55:21,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-27 19:55:21,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4850498338870432 [2024-06-27 19:55:21,668 INFO L175 Difference]: Start difference. First operand has 67 places, 68 transitions, 412 flow. Second operand 7 states and 146 transitions. [2024-06-27 19:55:21,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 98 transitions, 758 flow [2024-06-27 19:55:21,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 98 transitions, 724 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-27 19:55:21,676 INFO L231 Difference]: Finished difference. Result has 71 places, 74 transitions, 512 flow [2024-06-27 19:55:21,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=512, PETRI_PLACES=71, PETRI_TRANSITIONS=74} [2024-06-27 19:55:21,677 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 27 predicate places. [2024-06-27 19:55:21,677 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 74 transitions, 512 flow [2024-06-27 19:55:21,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:21,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:21,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:21,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 19:55:21,677 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)] === [2024-06-27 19:55:21,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:21,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1053965498, now seen corresponding path program 2 times [2024-06-27 19:55:21,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:21,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687600129] [2024-06-27 19:55:21,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:21,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:21,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:22,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:22,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:22,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687600129] [2024-06-27 19:55:22,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687600129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:22,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:22,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:55:22,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687406189] [2024-06-27 19:55:22,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:22,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:55:22,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:22,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:55:22,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:55:22,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:55:22,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 74 transitions, 512 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) [2024-06-27 19:55:22,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:22,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:55:22,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:23,044 INFO L124 PetriNetUnfolderBase]: 1855/2804 cut-off events. [2024-06-27 19:55:23,045 INFO L125 PetriNetUnfolderBase]: For 22808/22813 co-relation queries the response was YES. [2024-06-27 19:55:23,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12217 conditions, 2804 events. 1855/2804 cut-off events. For 22808/22813 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 13693 event pairs, 751 based on Foata normal form. 6/2808 useless extension candidates. Maximal degree in co-relation 12190. Up to 2663 conditions per place. [2024-06-27 19:55:23,058 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 66 selfloop transitions, 27 changer transitions 0/98 dead transitions. [2024-06-27 19:55:23,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 98 transitions, 826 flow [2024-06-27 19:55:23,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:55:23,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:55:23,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-27 19:55:23,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-27 19:55:23,060 INFO L175 Difference]: Start difference. First operand has 71 places, 74 transitions, 512 flow. Second operand 7 states and 136 transitions. [2024-06-27 19:55:23,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 98 transitions, 826 flow [2024-06-27 19:55:23,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 98 transitions, 782 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-27 19:55:23,070 INFO L231 Difference]: Finished difference. Result has 75 places, 77 transitions, 562 flow [2024-06-27 19:55:23,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=562, PETRI_PLACES=75, PETRI_TRANSITIONS=77} [2024-06-27 19:55:23,071 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 31 predicate places. [2024-06-27 19:55:23,071 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 77 transitions, 562 flow [2024-06-27 19:55:23,071 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) [2024-06-27 19:55:23,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:23,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:23,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 19:55:23,072 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)] === [2024-06-27 19:55:23,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:23,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1292688460, now seen corresponding path program 3 times [2024-06-27 19:55:23,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:23,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648931895] [2024-06-27 19:55:23,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:23,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:23,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:23,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:23,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:23,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648931895] [2024-06-27 19:55:23,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648931895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:23,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:23,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:55:23,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851825982] [2024-06-27 19:55:23,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:23,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:55:23,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:23,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:55:23,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:55:23,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:55:23,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 77 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) [2024-06-27 19:55:23,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:23,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:55:23,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:24,348 INFO L124 PetriNetUnfolderBase]: 1850/2797 cut-off events. [2024-06-27 19:55:24,348 INFO L125 PetriNetUnfolderBase]: For 25542/25547 co-relation queries the response was YES. [2024-06-27 19:55:24,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12484 conditions, 2797 events. 1850/2797 cut-off events. For 25542/25547 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 13660 event pairs, 751 based on Foata normal form. 6/2801 useless extension candidates. Maximal degree in co-relation 12455. Up to 2658 conditions per place. [2024-06-27 19:55:24,362 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 65 selfloop transitions, 26 changer transitions 0/96 dead transitions. [2024-06-27 19:55:24,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 96 transitions, 792 flow [2024-06-27 19:55:24,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:55:24,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:55:24,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-27 19:55:24,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4485049833887043 [2024-06-27 19:55:24,363 INFO L175 Difference]: Start difference. First operand has 75 places, 77 transitions, 562 flow. Second operand 7 states and 135 transitions. [2024-06-27 19:55:24,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 96 transitions, 792 flow [2024-06-27 19:55:24,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 96 transitions, 714 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-27 19:55:24,377 INFO L231 Difference]: Finished difference. Result has 78 places, 77 transitions, 544 flow [2024-06-27 19:55:24,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=484, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=544, PETRI_PLACES=78, PETRI_TRANSITIONS=77} [2024-06-27 19:55:24,377 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 34 predicate places. [2024-06-27 19:55:24,378 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 77 transitions, 544 flow [2024-06-27 19:55:24,378 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) [2024-06-27 19:55:24,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:24,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:24,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 19:55:24,378 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)] === [2024-06-27 19:55:24,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:24,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1288526124, now seen corresponding path program 3 times [2024-06-27 19:55:24,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:24,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979987614] [2024-06-27 19:55:24,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:24,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:24,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:25,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:25,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:25,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979987614] [2024-06-27 19:55:25,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979987614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:25,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:25,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:55:25,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896127182] [2024-06-27 19:55:25,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:25,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:55:25,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:25,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:55:25,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:55:25,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:55:25,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 77 transitions, 544 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:25,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:25,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:55:25,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:25,708 INFO L124 PetriNetUnfolderBase]: 1741/2681 cut-off events. [2024-06-27 19:55:25,708 INFO L125 PetriNetUnfolderBase]: For 28404/28404 co-relation queries the response was YES. [2024-06-27 19:55:25,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12212 conditions, 2681 events. 1741/2681 cut-off events. For 28404/28404 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 13404 event pairs, 707 based on Foata normal form. 2/2679 useless extension candidates. Maximal degree in co-relation 12182. Up to 2483 conditions per place. [2024-06-27 19:55:25,719 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 60 selfloop transitions, 26 changer transitions 0/96 dead transitions. [2024-06-27 19:55:25,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 96 transitions, 764 flow [2024-06-27 19:55:25,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:55:25,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:55:25,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-27 19:55:25,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4684385382059801 [2024-06-27 19:55:25,720 INFO L175 Difference]: Start difference. First operand has 78 places, 77 transitions, 544 flow. Second operand 7 states and 141 transitions. [2024-06-27 19:55:25,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 96 transitions, 764 flow [2024-06-27 19:55:25,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 96 transitions, 672 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-27 19:55:25,731 INFO L231 Difference]: Finished difference. Result has 78 places, 77 transitions, 512 flow [2024-06-27 19:55:25,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=512, PETRI_PLACES=78, PETRI_TRANSITIONS=77} [2024-06-27 19:55:25,732 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 34 predicate places. [2024-06-27 19:55:25,732 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 77 transitions, 512 flow [2024-06-27 19:55:25,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:25,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:25,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:25,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 19:55:25,733 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)] === [2024-06-27 19:55:25,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:25,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1931356471, now seen corresponding path program 1 times [2024-06-27 19:55:25,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:25,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76330839] [2024-06-27 19:55:25,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:25,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:25,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:26,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:26,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:26,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76330839] [2024-06-27 19:55:26,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76330839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:26,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:26,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:55:26,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736081051] [2024-06-27 19:55:26,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:26,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:55:26,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:26,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:55:26,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:55:26,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-27 19:55:26,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 77 transitions, 512 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:26,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:26,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-27 19:55:26,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:26,705 INFO L124 PetriNetUnfolderBase]: 1387/2313 cut-off events. [2024-06-27 19:55:26,705 INFO L125 PetriNetUnfolderBase]: For 26173/26173 co-relation queries the response was YES. [2024-06-27 19:55:26,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10496 conditions, 2313 events. 1387/2313 cut-off events. For 26173/26173 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 12568 event pairs, 589 based on Foata normal form. 1/2313 useless extension candidates. Maximal degree in co-relation 10465. Up to 2046 conditions per place. [2024-06-27 19:55:26,716 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 62 selfloop transitions, 8 changer transitions 0/88 dead transitions. [2024-06-27 19:55:26,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 88 transitions, 692 flow [2024-06-27 19:55:26,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:55:26,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:55:26,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 105 transitions. [2024-06-27 19:55:26,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-27 19:55:26,717 INFO L175 Difference]: Start difference. First operand has 78 places, 77 transitions, 512 flow. Second operand 5 states and 105 transitions. [2024-06-27 19:55:26,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 88 transitions, 692 flow [2024-06-27 19:55:26,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 88 transitions, 622 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 19:55:26,730 INFO L231 Difference]: Finished difference. Result has 77 places, 80 transitions, 490 flow [2024-06-27 19:55:26,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=490, PETRI_PLACES=77, PETRI_TRANSITIONS=80} [2024-06-27 19:55:26,730 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 33 predicate places. [2024-06-27 19:55:26,731 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 80 transitions, 490 flow [2024-06-27 19:55:26,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:26,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:26,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:26,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 19:55:26,731 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)] === [2024-06-27 19:55:26,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:26,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1805535858, now seen corresponding path program 1 times [2024-06-27 19:55:26,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:26,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135634618] [2024-06-27 19:55:26,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:26,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:26,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:27,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:27,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:27,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135634618] [2024-06-27 19:55:27,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135634618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:27,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:27,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:55:27,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984209826] [2024-06-27 19:55:27,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:27,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:55:27,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:27,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:55:27,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:55:27,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:55:27,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 80 transitions, 490 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) [2024-06-27 19:55:27,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:27,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:55:27,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:28,165 INFO L124 PetriNetUnfolderBase]: 1853/2801 cut-off events. [2024-06-27 19:55:28,165 INFO L125 PetriNetUnfolderBase]: For 34417/34417 co-relation queries the response was YES. [2024-06-27 19:55:28,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13383 conditions, 2801 events. 1853/2801 cut-off events. For 34417/34417 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 13689 event pairs, 722 based on Foata normal form. 2/2802 useless extension candidates. Maximal degree in co-relation 13351. Up to 2693 conditions per place. [2024-06-27 19:55:28,180 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 90 selfloop transitions, 17 changer transitions 0/112 dead transitions. [2024-06-27 19:55:28,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 112 transitions, 814 flow [2024-06-27 19:55:28,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:55:28,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:55:28,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-27 19:55:28,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-27 19:55:28,182 INFO L175 Difference]: Start difference. First operand has 77 places, 80 transitions, 490 flow. Second operand 8 states and 154 transitions. [2024-06-27 19:55:28,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 112 transitions, 814 flow [2024-06-27 19:55:28,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 112 transitions, 788 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-27 19:55:28,196 INFO L231 Difference]: Finished difference. Result has 82 places, 83 transitions, 548 flow [2024-06-27 19:55:28,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=464, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=548, PETRI_PLACES=82, PETRI_TRANSITIONS=83} [2024-06-27 19:55:28,197 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 38 predicate places. [2024-06-27 19:55:28,197 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 83 transitions, 548 flow [2024-06-27 19:55:28,197 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) [2024-06-27 19:55:28,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:28,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:28,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 19:55:28,197 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)] === [2024-06-27 19:55:28,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:28,198 INFO L85 PathProgramCache]: Analyzing trace with hash 549477099, now seen corresponding path program 1 times [2024-06-27 19:55:28,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:28,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085656174] [2024-06-27 19:55:28,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:28,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:28,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:28,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:28,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:28,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085656174] [2024-06-27 19:55:28,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085656174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:28,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:28,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:55:28,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809243318] [2024-06-27 19:55:28,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:28,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:55:28,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:28,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:55:28,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:55:29,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:55:29,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 83 transitions, 548 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) [2024-06-27 19:55:29,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:29,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:55:29,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:29,716 INFO L124 PetriNetUnfolderBase]: 1875/2840 cut-off events. [2024-06-27 19:55:29,716 INFO L125 PetriNetUnfolderBase]: For 39678/39684 co-relation queries the response was YES. [2024-06-27 19:55:29,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14172 conditions, 2840 events. 1875/2840 cut-off events. For 39678/39684 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 13909 event pairs, 680 based on Foata normal form. 5/2842 useless extension candidates. Maximal degree in co-relation 14139. Up to 2620 conditions per place. [2024-06-27 19:55:29,731 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 83 selfloop transitions, 32 changer transitions 0/120 dead transitions. [2024-06-27 19:55:29,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 120 transitions, 984 flow [2024-06-27 19:55:29,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:55:29,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:55:29,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-27 19:55:29,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47093023255813954 [2024-06-27 19:55:29,732 INFO L175 Difference]: Start difference. First operand has 82 places, 83 transitions, 548 flow. Second operand 8 states and 162 transitions. [2024-06-27 19:55:29,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 120 transitions, 984 flow [2024-06-27 19:55:29,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 120 transitions, 924 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 19:55:29,748 INFO L231 Difference]: Finished difference. Result has 84 places, 89 transitions, 634 flow [2024-06-27 19:55:29,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=488, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=634, PETRI_PLACES=84, PETRI_TRANSITIONS=89} [2024-06-27 19:55:29,749 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 40 predicate places. [2024-06-27 19:55:29,749 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 89 transitions, 634 flow [2024-06-27 19:55:29,749 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) [2024-06-27 19:55:29,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:29,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:29,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 19:55:29,750 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)] === [2024-06-27 19:55:29,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:29,750 INFO L85 PathProgramCache]: Analyzing trace with hash 549476882, now seen corresponding path program 2 times [2024-06-27 19:55:29,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:29,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531401459] [2024-06-27 19:55:29,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:29,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:29,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:30,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:30,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:30,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531401459] [2024-06-27 19:55:30,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531401459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:30,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:30,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:55:30,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454159123] [2024-06-27 19:55:30,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:30,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:55:30,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:30,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:55:30,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:55:30,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:55:30,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 89 transitions, 634 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) [2024-06-27 19:55:30,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:30,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:55:30,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:31,239 INFO L124 PetriNetUnfolderBase]: 1902/2888 cut-off events. [2024-06-27 19:55:31,239 INFO L125 PetriNetUnfolderBase]: For 45740/45743 co-relation queries the response was YES. [2024-06-27 19:55:31,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15069 conditions, 2888 events. 1902/2888 cut-off events. For 45740/45743 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 14247 event pairs, 708 based on Foata normal form. 4/2889 useless extension candidates. Maximal degree in co-relation 15035. Up to 2642 conditions per place. [2024-06-27 19:55:31,253 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 79 selfloop transitions, 44 changer transitions 0/128 dead transitions. [2024-06-27 19:55:31,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 128 transitions, 1218 flow [2024-06-27 19:55:31,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:55:31,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:55:31,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-27 19:55:31,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47093023255813954 [2024-06-27 19:55:31,254 INFO L175 Difference]: Start difference. First operand has 84 places, 89 transitions, 634 flow. Second operand 8 states and 162 transitions. [2024-06-27 19:55:31,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 128 transitions, 1218 flow [2024-06-27 19:55:31,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 128 transitions, 1170 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-27 19:55:31,273 INFO L231 Difference]: Finished difference. Result has 88 places, 98 transitions, 820 flow [2024-06-27 19:55:31,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=586, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=820, PETRI_PLACES=88, PETRI_TRANSITIONS=98} [2024-06-27 19:55:31,273 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 44 predicate places. [2024-06-27 19:55:31,274 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 98 transitions, 820 flow [2024-06-27 19:55:31,274 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) [2024-06-27 19:55:31,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:31,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:31,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 19:55:31,274 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)] === [2024-06-27 19:55:31,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:31,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1809254928, now seen corresponding path program 3 times [2024-06-27 19:55:31,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:31,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436991601] [2024-06-27 19:55:31,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:31,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:31,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:32,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:32,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:32,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436991601] [2024-06-27 19:55:32,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436991601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:32,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:32,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:55:32,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993907070] [2024-06-27 19:55:32,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:32,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:55:32,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:32,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:55:32,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:55:32,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:55:32,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 98 transitions, 820 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) [2024-06-27 19:55:32,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:32,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:55:32,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:32,799 INFO L124 PetriNetUnfolderBase]: 1897/2881 cut-off events. [2024-06-27 19:55:32,799 INFO L125 PetriNetUnfolderBase]: For 51416/51419 co-relation queries the response was YES. [2024-06-27 19:55:32,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15674 conditions, 2881 events. 1897/2881 cut-off events. For 51416/51419 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 14193 event pairs, 708 based on Foata normal form. 4/2882 useless extension candidates. Maximal degree in co-relation 15638. Up to 2637 conditions per place. [2024-06-27 19:55:32,843 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 78 selfloop transitions, 43 changer transitions 0/126 dead transitions. [2024-06-27 19:55:32,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 126 transitions, 1202 flow [2024-06-27 19:55:32,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:55:32,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:55:32,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-27 19:55:32,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680232558139535 [2024-06-27 19:55:32,845 INFO L175 Difference]: Start difference. First operand has 88 places, 98 transitions, 820 flow. Second operand 8 states and 161 transitions. [2024-06-27 19:55:32,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 126 transitions, 1202 flow [2024-06-27 19:55:32,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 126 transitions, 1118 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-27 19:55:32,865 INFO L231 Difference]: Finished difference. Result has 93 places, 98 transitions, 830 flow [2024-06-27 19:55:32,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=736, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=830, PETRI_PLACES=93, PETRI_TRANSITIONS=98} [2024-06-27 19:55:32,866 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 49 predicate places. [2024-06-27 19:55:32,866 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 98 transitions, 830 flow [2024-06-27 19:55:32,866 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) [2024-06-27 19:55:32,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:32,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:32,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 19:55:32,867 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)] === [2024-06-27 19:55:32,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:32,867 INFO L85 PathProgramCache]: Analyzing trace with hash 239540132, now seen corresponding path program 4 times [2024-06-27 19:55:32,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:32,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449762468] [2024-06-27 19:55:32,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:32,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:32,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:33,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:33,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:33,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449762468] [2024-06-27 19:55:33,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449762468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:33,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:33,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:55:33,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119466562] [2024-06-27 19:55:33,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:33,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:55:33,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:33,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:55:33,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:55:33,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:55:33,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 98 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) [2024-06-27 19:55:33,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:33,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:55:33,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:34,452 INFO L124 PetriNetUnfolderBase]: 1924/2922 cut-off events. [2024-06-27 19:55:34,452 INFO L125 PetriNetUnfolderBase]: For 56958/56958 co-relation queries the response was YES. [2024-06-27 19:55:34,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16324 conditions, 2922 events. 1924/2922 cut-off events. For 56958/56958 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 14383 event pairs, 714 based on Foata normal form. 2/2920 useless extension candidates. Maximal degree in co-relation 16286. Up to 2666 conditions per place. [2024-06-27 19:55:34,466 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 77 selfloop transitions, 49 changer transitions 0/131 dead transitions. [2024-06-27 19:55:34,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 131 transitions, 1408 flow [2024-06-27 19:55:34,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:55:34,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:55:34,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 19:55:34,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 19:55:34,468 INFO L175 Difference]: Start difference. First operand has 93 places, 98 transitions, 830 flow. Second operand 8 states and 160 transitions. [2024-06-27 19:55:34,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 131 transitions, 1408 flow [2024-06-27 19:55:34,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 131 transitions, 1290 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 19:55:34,492 INFO L231 Difference]: Finished difference. Result has 94 places, 104 transitions, 930 flow [2024-06-27 19:55:34,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=724, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=930, PETRI_PLACES=94, PETRI_TRANSITIONS=104} [2024-06-27 19:55:34,492 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 50 predicate places. [2024-06-27 19:55:34,492 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 104 transitions, 930 flow [2024-06-27 19:55:34,493 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) [2024-06-27 19:55:34,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:34,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:34,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 19:55:34,493 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)] === [2024-06-27 19:55:34,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:34,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1289596747, now seen corresponding path program 2 times [2024-06-27 19:55:34,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:34,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135062975] [2024-06-27 19:55:34,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:34,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:34,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:35,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:35,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:35,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135062975] [2024-06-27 19:55:35,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135062975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:35,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:35,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:55:35,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178717248] [2024-06-27 19:55:35,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:35,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:55:35,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:35,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:55:35,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:55:35,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:55:35,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 104 transitions, 930 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) [2024-06-27 19:55:35,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:35,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:55:35,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:35,942 INFO L124 PetriNetUnfolderBase]: 1946/2957 cut-off events. [2024-06-27 19:55:35,943 INFO L125 PetriNetUnfolderBase]: For 62290/62295 co-relation queries the response was YES. [2024-06-27 19:55:35,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16719 conditions, 2957 events. 1946/2957 cut-off events. For 62290/62295 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 14603 event pairs, 669 based on Foata normal form. 8/2963 useless extension candidates. Maximal degree in co-relation 16680. Up to 2710 conditions per place. [2024-06-27 19:55:35,958 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 95 selfloop transitions, 35 changer transitions 0/135 dead transitions. [2024-06-27 19:55:35,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 135 transitions, 1376 flow [2024-06-27 19:55:35,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:55:35,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:55:35,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-27 19:55:35,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622093023255814 [2024-06-27 19:55:35,960 INFO L175 Difference]: Start difference. First operand has 94 places, 104 transitions, 930 flow. Second operand 8 states and 159 transitions. [2024-06-27 19:55:35,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 135 transitions, 1376 flow [2024-06-27 19:55:35,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 135 transitions, 1234 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 19:55:35,980 INFO L231 Difference]: Finished difference. Result has 97 places, 107 transitions, 906 flow [2024-06-27 19:55:35,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=788, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=906, PETRI_PLACES=97, PETRI_TRANSITIONS=107} [2024-06-27 19:55:35,980 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 53 predicate places. [2024-06-27 19:55:35,980 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 107 transitions, 906 flow [2024-06-27 19:55:35,981 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) [2024-06-27 19:55:35,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:35,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:35,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 19:55:35,981 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)] === [2024-06-27 19:55:35,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:35,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1411016369, now seen corresponding path program 3 times [2024-06-27 19:55:35,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:35,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535916954] [2024-06-27 19:55:35,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:35,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:35,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:36,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:36,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:36,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535916954] [2024-06-27 19:55:36,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535916954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:36,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:36,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:55:36,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820155010] [2024-06-27 19:55:36,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:36,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:55:36,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:36,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:55:36,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:55:36,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:55:36,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 107 transitions, 906 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) [2024-06-27 19:55:36,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:36,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:55:36,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:37,620 INFO L124 PetriNetUnfolderBase]: 1968/2994 cut-off events. [2024-06-27 19:55:37,620 INFO L125 PetriNetUnfolderBase]: For 67460/67465 co-relation queries the response was YES. [2024-06-27 19:55:37,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17085 conditions, 2994 events. 1968/2994 cut-off events. For 67460/67465 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 14798 event pairs, 671 based on Foata normal form. 8/3000 useless extension candidates. Maximal degree in co-relation 17045. Up to 2729 conditions per place. [2024-06-27 19:55:37,637 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 91 selfloop transitions, 41 changer transitions 0/137 dead transitions. [2024-06-27 19:55:37,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 137 transitions, 1364 flow [2024-06-27 19:55:37,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:55:37,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:55:37,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 19:55:37,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-27 19:55:37,638 INFO L175 Difference]: Start difference. First operand has 97 places, 107 transitions, 906 flow. Second operand 8 states and 156 transitions. [2024-06-27 19:55:37,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 137 transitions, 1364 flow [2024-06-27 19:55:37,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 137 transitions, 1256 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-27 19:55:37,663 INFO L231 Difference]: Finished difference. Result has 99 places, 110 transitions, 934 flow [2024-06-27 19:55:37,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=804, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=934, PETRI_PLACES=99, PETRI_TRANSITIONS=110} [2024-06-27 19:55:37,664 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 55 predicate places. [2024-06-27 19:55:37,664 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 110 transitions, 934 flow [2024-06-27 19:55:37,664 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) [2024-06-27 19:55:37,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:37,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:37,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 19:55:37,664 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)] === [2024-06-27 19:55:37,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:37,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1411283279, now seen corresponding path program 4 times [2024-06-27 19:55:37,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:37,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065176230] [2024-06-27 19:55:37,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:37,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:37,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:38,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:38,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:38,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065176230] [2024-06-27 19:55:38,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065176230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:38,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:38,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:55:38,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339215363] [2024-06-27 19:55:38,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:38,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:55:38,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:38,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:55:38,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:55:38,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:55:38,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 110 transitions, 934 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) [2024-06-27 19:55:38,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:38,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:55:38,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:39,133 INFO L124 PetriNetUnfolderBase]: 1958/2980 cut-off events. [2024-06-27 19:55:39,134 INFO L125 PetriNetUnfolderBase]: For 71502/71507 co-relation queries the response was YES. [2024-06-27 19:55:39,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17143 conditions, 2980 events. 1958/2980 cut-off events. For 71502/71507 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 14781 event pairs, 669 based on Foata normal form. 8/2986 useless extension candidates. Maximal degree in co-relation 17102. Up to 2721 conditions per place. [2024-06-27 19:55:39,148 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 92 selfloop transitions, 39 changer transitions 0/136 dead transitions. [2024-06-27 19:55:39,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 136 transitions, 1260 flow [2024-06-27 19:55:39,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:55:39,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:55:39,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 19:55:39,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-27 19:55:39,149 INFO L175 Difference]: Start difference. First operand has 99 places, 110 transitions, 934 flow. Second operand 8 states and 156 transitions. [2024-06-27 19:55:39,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 136 transitions, 1260 flow [2024-06-27 19:55:39,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 136 transitions, 1142 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-27 19:55:39,183 INFO L231 Difference]: Finished difference. Result has 102 places, 110 transitions, 902 flow [2024-06-27 19:55:39,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=816, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=902, PETRI_PLACES=102, PETRI_TRANSITIONS=110} [2024-06-27 19:55:39,184 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 58 predicate places. [2024-06-27 19:55:39,184 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 110 transitions, 902 flow [2024-06-27 19:55:39,184 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) [2024-06-27 19:55:39,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:39,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:39,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 19:55:39,184 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)] === [2024-06-27 19:55:39,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:39,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1418640726, now seen corresponding path program 5 times [2024-06-27 19:55:39,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:39,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181588659] [2024-06-27 19:55:39,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:39,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:39,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:39,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:39,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:39,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181588659] [2024-06-27 19:55:39,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181588659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:39,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:39,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:55:39,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216095040] [2024-06-27 19:55:39,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:39,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:55:39,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:39,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:55:39,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:55:39,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:55:39,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 110 transitions, 902 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) [2024-06-27 19:55:39,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:39,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:55:39,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:40,661 INFO L124 PetriNetUnfolderBase]: 1953/2970 cut-off events. [2024-06-27 19:55:40,661 INFO L125 PetriNetUnfolderBase]: For 75673/75673 co-relation queries the response was YES. [2024-06-27 19:55:40,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17209 conditions, 2970 events. 1953/2970 cut-off events. For 75673/75673 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 14681 event pairs, 717 based on Foata normal form. 2/2968 useless extension candidates. Maximal degree in co-relation 17167. Up to 2711 conditions per place. [2024-06-27 19:55:40,679 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 80 selfloop transitions, 50 changer transitions 0/135 dead transitions. [2024-06-27 19:55:40,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 135 transitions, 1314 flow [2024-06-27 19:55:40,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:55:40,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:55:40,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-27 19:55:40,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-27 19:55:40,680 INFO L175 Difference]: Start difference. First operand has 102 places, 110 transitions, 902 flow. Second operand 8 states and 157 transitions. [2024-06-27 19:55:40,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 135 transitions, 1314 flow [2024-06-27 19:55:40,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 135 transitions, 1184 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-27 19:55:40,715 INFO L231 Difference]: Finished difference. Result has 102 places, 110 transitions, 880 flow [2024-06-27 19:55:40,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=772, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=880, PETRI_PLACES=102, PETRI_TRANSITIONS=110} [2024-06-27 19:55:40,716 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 58 predicate places. [2024-06-27 19:55:40,716 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 110 transitions, 880 flow [2024-06-27 19:55:40,716 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) [2024-06-27 19:55:40,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:40,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:40,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 19:55:40,717 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)] === [2024-06-27 19:55:40,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:40,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1411283496, now seen corresponding path program 6 times [2024-06-27 19:55:40,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:40,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162234801] [2024-06-27 19:55:40,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:40,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:40,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:41,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:41,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:41,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162234801] [2024-06-27 19:55:41,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162234801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:41,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:41,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:55:41,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269811194] [2024-06-27 19:55:41,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:41,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:55:41,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:41,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:55:41,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:55:41,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:55:41,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 110 transitions, 880 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) [2024-06-27 19:55:41,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:41,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:55:41,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:42,258 INFO L124 PetriNetUnfolderBase]: 1948/2968 cut-off events. [2024-06-27 19:55:42,258 INFO L125 PetriNetUnfolderBase]: For 80663/80663 co-relation queries the response was YES. [2024-06-27 19:55:42,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17315 conditions, 2968 events. 1948/2968 cut-off events. For 80663/80663 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 14695 event pairs, 717 based on Foata normal form. 2/2966 useless extension candidates. Maximal degree in co-relation 17272. Up to 2706 conditions per place. [2024-06-27 19:55:42,275 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 76 selfloop transitions, 52 changer transitions 0/133 dead transitions. [2024-06-27 19:55:42,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 133 transitions, 1194 flow [2024-06-27 19:55:42,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:55:42,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:55:42,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-27 19:55:42,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-27 19:55:42,276 INFO L175 Difference]: Start difference. First operand has 102 places, 110 transitions, 880 flow. Second operand 8 states and 154 transitions. [2024-06-27 19:55:42,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 133 transitions, 1194 flow [2024-06-27 19:55:42,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 133 transitions, 1062 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-27 19:55:42,315 INFO L231 Difference]: Finished difference. Result has 104 places, 110 transitions, 860 flow [2024-06-27 19:55:42,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=748, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=860, PETRI_PLACES=104, PETRI_TRANSITIONS=110} [2024-06-27 19:55:42,315 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 60 predicate places. [2024-06-27 19:55:42,315 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 110 transitions, 860 flow [2024-06-27 19:55:42,316 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) [2024-06-27 19:55:42,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:42,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:42,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 19:55:42,316 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:55:42,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:42,316 INFO L85 PathProgramCache]: Analyzing trace with hash -257489989, now seen corresponding path program 1 times [2024-06-27 19:55:42,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:42,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469252856] [2024-06-27 19:55:42,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:42,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:42,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:43,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:43,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:43,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469252856] [2024-06-27 19:55:43,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469252856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:43,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:43,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:55:43,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961494341] [2024-06-27 19:55:43,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:43,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:55:43,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:43,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:55:43,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:55:43,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-27 19:55:43,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 110 transitions, 860 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 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) [2024-06-27 19:55:43,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:43,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-27 19:55:43,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:43,618 INFO L124 PetriNetUnfolderBase]: 1465/2467 cut-off events. [2024-06-27 19:55:43,618 INFO L125 PetriNetUnfolderBase]: For 71923/71923 co-relation queries the response was YES. [2024-06-27 19:55:43,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14282 conditions, 2467 events. 1465/2467 cut-off events. For 71923/71923 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 13660 event pairs, 564 based on Foata normal form. 2/2468 useless extension candidates. Maximal degree in co-relation 14238. Up to 2122 conditions per place. [2024-06-27 19:55:43,633 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 84 selfloop transitions, 11 changer transitions 0/123 dead transitions. [2024-06-27 19:55:43,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 123 transitions, 1098 flow [2024-06-27 19:55:43,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:55:43,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:55:43,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-27 19:55:43,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-27 19:55:43,634 INFO L175 Difference]: Start difference. First operand has 104 places, 110 transitions, 860 flow. Second operand 6 states and 123 transitions. [2024-06-27 19:55:43,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 123 transitions, 1098 flow [2024-06-27 19:55:43,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 123 transitions, 970 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 19:55:43,662 INFO L231 Difference]: Finished difference. Result has 102 places, 113 transitions, 790 flow [2024-06-27 19:55:43,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=732, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=790, PETRI_PLACES=102, PETRI_TRANSITIONS=113} [2024-06-27 19:55:43,662 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 58 predicate places. [2024-06-27 19:55:43,662 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 113 transitions, 790 flow [2024-06-27 19:55:43,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 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) [2024-06-27 19:55:43,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:43,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:43,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 19:55:43,663 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:55:43,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:43,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1378799503, now seen corresponding path program 1 times [2024-06-27 19:55:43,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:43,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193782941] [2024-06-27 19:55:43,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:43,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:43,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:44,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:44,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:44,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193782941] [2024-06-27 19:55:44,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193782941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:44,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:44,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:55:44,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543312389] [2024-06-27 19:55:44,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:44,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:55:44,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:44,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:55:44,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:55:44,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:55:44,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 113 transitions, 790 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:44,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:44,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:55:44,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:45,251 INFO L124 PetriNetUnfolderBase]: 1882/2920 cut-off events. [2024-06-27 19:55:45,251 INFO L125 PetriNetUnfolderBase]: For 92318/92318 co-relation queries the response was YES. [2024-06-27 19:55:45,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17670 conditions, 2920 events. 1882/2920 cut-off events. For 92318/92318 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 14917 event pairs, 464 based on Foata normal form. 4/2923 useless extension candidates. Maximal degree in co-relation 17625. Up to 2631 conditions per place. [2024-06-27 19:55:45,267 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 118 selfloop transitions, 20 changer transitions 0/154 dead transitions. [2024-06-27 19:55:45,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 154 transitions, 1334 flow [2024-06-27 19:55:45,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:55:45,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:55:45,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-27 19:55:45,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4702842377260982 [2024-06-27 19:55:45,269 INFO L175 Difference]: Start difference. First operand has 102 places, 113 transitions, 790 flow. Second operand 9 states and 182 transitions. [2024-06-27 19:55:45,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 154 transitions, 1334 flow [2024-06-27 19:55:45,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 154 transitions, 1298 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 19:55:45,318 INFO L231 Difference]: Finished difference. Result has 107 places, 117 transitions, 881 flow [2024-06-27 19:55:45,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=754, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=881, PETRI_PLACES=107, PETRI_TRANSITIONS=117} [2024-06-27 19:55:45,319 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 63 predicate places. [2024-06-27 19:55:45,319 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 117 transitions, 881 flow [2024-06-27 19:55:45,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:45,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:45,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:45,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 19:55:45,320 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)] === [2024-06-27 19:55:45,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:45,320 INFO L85 PathProgramCache]: Analyzing trace with hash 247855977, now seen corresponding path program 2 times [2024-06-27 19:55:45,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:45,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618753147] [2024-06-27 19:55:45,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:45,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:45,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:46,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:46,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:46,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618753147] [2024-06-27 19:55:46,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618753147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:46,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:46,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:55:46,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113760343] [2024-06-27 19:55:46,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:46,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:55:46,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:46,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:55:46,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:55:46,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:55:46,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 117 transitions, 881 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:46,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:46,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:55:46,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:46,857 INFO L124 PetriNetUnfolderBase]: 1874/2908 cut-off events. [2024-06-27 19:55:46,858 INFO L125 PetriNetUnfolderBase]: For 98335/98335 co-relation queries the response was YES. [2024-06-27 19:55:46,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17941 conditions, 2908 events. 1874/2908 cut-off events. For 98335/98335 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 14813 event pairs, 623 based on Foata normal form. 4/2911 useless extension candidates. Maximal degree in co-relation 17895. Up to 2678 conditions per place. [2024-06-27 19:55:46,875 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 115 selfloop transitions, 16 changer transitions 0/147 dead transitions. [2024-06-27 19:55:46,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 147 transitions, 1219 flow [2024-06-27 19:55:46,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:55:46,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:55:46,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-27 19:55:46,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680232558139535 [2024-06-27 19:55:46,876 INFO L175 Difference]: Start difference. First operand has 107 places, 117 transitions, 881 flow. Second operand 8 states and 161 transitions. [2024-06-27 19:55:46,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 147 transitions, 1219 flow [2024-06-27 19:55:46,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 147 transitions, 1135 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-27 19:55:46,926 INFO L231 Difference]: Finished difference. Result has 110 places, 117 transitions, 836 flow [2024-06-27 19:55:46,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=797, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=836, PETRI_PLACES=110, PETRI_TRANSITIONS=117} [2024-06-27 19:55:46,927 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 66 predicate places. [2024-06-27 19:55:46,927 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 117 transitions, 836 flow [2024-06-27 19:55:46,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:46,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:46,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:46,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 19:55:46,927 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)] === [2024-06-27 19:55:46,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:46,928 INFO L85 PathProgramCache]: Analyzing trace with hash 137038417, now seen corresponding path program 1 times [2024-06-27 19:55:46,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:46,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815173261] [2024-06-27 19:55:46,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:46,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:46,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:47,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:47,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:47,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815173261] [2024-06-27 19:55:47,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815173261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:47,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:47,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:55:47,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47068173] [2024-06-27 19:55:47,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:47,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:55:47,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:47,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:55:47,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:55:47,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:55:47,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 117 transitions, 836 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) [2024-06-27 19:55:47,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:47,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:55:47,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:48,450 INFO L124 PetriNetUnfolderBase]: 1995/3051 cut-off events. [2024-06-27 19:55:48,450 INFO L125 PetriNetUnfolderBase]: For 106469/106469 co-relation queries the response was YES. [2024-06-27 19:55:48,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18833 conditions, 3051 events. 1995/3051 cut-off events. For 106469/106469 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 15268 event pairs, 651 based on Foata normal form. 4/3054 useless extension candidates. Maximal degree in co-relation 18785. Up to 2888 conditions per place. [2024-06-27 19:55:48,467 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 129 selfloop transitions, 20 changer transitions 0/154 dead transitions. [2024-06-27 19:55:48,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 154 transitions, 1268 flow [2024-06-27 19:55:48,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:55:48,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:55:48,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-27 19:55:48,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 19:55:48,469 INFO L175 Difference]: Start difference. First operand has 110 places, 117 transitions, 836 flow. Second operand 9 states and 172 transitions. [2024-06-27 19:55:48,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 154 transitions, 1268 flow [2024-06-27 19:55:48,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 154 transitions, 1231 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-27 19:55:48,505 INFO L231 Difference]: Finished difference. Result has 112 places, 120 transitions, 901 flow [2024-06-27 19:55:48,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=799, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=901, PETRI_PLACES=112, PETRI_TRANSITIONS=120} [2024-06-27 19:55:48,506 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 68 predicate places. [2024-06-27 19:55:48,506 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 120 transitions, 901 flow [2024-06-27 19:55:48,506 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) [2024-06-27 19:55:48,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:48,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:48,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 19:55:48,507 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)] === [2024-06-27 19:55:48,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:48,507 INFO L85 PathProgramCache]: Analyzing trace with hash -146262115, now seen corresponding path program 3 times [2024-06-27 19:55:48,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:48,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634510979] [2024-06-27 19:55:48,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:48,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:48,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:49,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:49,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:49,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634510979] [2024-06-27 19:55:49,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634510979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:49,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:49,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:55:49,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380470727] [2024-06-27 19:55:49,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:49,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:55:49,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:49,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:55:49,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:55:49,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:55:49,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 120 transitions, 901 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:49,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:49,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:55:49,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:50,022 INFO L124 PetriNetUnfolderBase]: 1913/2978 cut-off events. [2024-06-27 19:55:50,022 INFO L125 PetriNetUnfolderBase]: For 114023/114026 co-relation queries the response was YES. [2024-06-27 19:55:50,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19032 conditions, 2978 events. 1913/2978 cut-off events. For 114023/114026 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 15301 event pairs, 622 based on Foata normal form. 6/2982 useless extension candidates. Maximal degree in co-relation 18983. Up to 2692 conditions per place. [2024-06-27 19:55:50,041 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 105 selfloop transitions, 28 changer transitions 0/149 dead transitions. [2024-06-27 19:55:50,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 149 transitions, 1279 flow [2024-06-27 19:55:50,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:55:50,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:55:50,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-27 19:55:50,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47093023255813954 [2024-06-27 19:55:50,042 INFO L175 Difference]: Start difference. First operand has 112 places, 120 transitions, 901 flow. Second operand 8 states and 162 transitions. [2024-06-27 19:55:50,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 149 transitions, 1279 flow [2024-06-27 19:55:50,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 149 transitions, 1201 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-27 19:55:50,093 INFO L231 Difference]: Finished difference. Result has 113 places, 122 transitions, 934 flow [2024-06-27 19:55:50,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=823, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=934, PETRI_PLACES=113, PETRI_TRANSITIONS=122} [2024-06-27 19:55:50,094 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 69 predicate places. [2024-06-27 19:55:50,094 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 122 transitions, 934 flow [2024-06-27 19:55:50,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:50,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:50,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:50,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 19:55:50,095 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)] === [2024-06-27 19:55:50,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:50,095 INFO L85 PathProgramCache]: Analyzing trace with hash 252509077, now seen corresponding path program 2 times [2024-06-27 19:55:50,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:50,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210489800] [2024-06-27 19:55:50,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:50,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:50,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:50,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:50,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:50,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210489800] [2024-06-27 19:55:50,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210489800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:50,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:50,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:55:50,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314381042] [2024-06-27 19:55:50,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:50,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:55:50,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:50,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:55:50,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:55:50,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:55:50,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 122 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) [2024-06-27 19:55:50,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:50,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:55:50,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:51,858 INFO L124 PetriNetUnfolderBase]: 2066/3165 cut-off events. [2024-06-27 19:55:51,859 INFO L125 PetriNetUnfolderBase]: For 126089/126092 co-relation queries the response was YES. [2024-06-27 19:55:51,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20565 conditions, 3165 events. 2066/3165 cut-off events. For 126089/126092 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15987 event pairs, 595 based on Foata normal form. 4/3166 useless extension candidates. Maximal degree in co-relation 20515. Up to 2656 conditions per place. [2024-06-27 19:55:51,881 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 97 selfloop transitions, 67 changer transitions 0/169 dead transitions. [2024-06-27 19:55:51,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 169 transitions, 1754 flow [2024-06-27 19:55:51,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:55:51,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:55:51,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-27 19:55:51,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4806201550387597 [2024-06-27 19:55:51,882 INFO L175 Difference]: Start difference. First operand has 113 places, 122 transitions, 934 flow. Second operand 9 states and 186 transitions. [2024-06-27 19:55:51,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 169 transitions, 1754 flow [2024-06-27 19:55:51,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 169 transitions, 1661 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-27 19:55:51,931 INFO L231 Difference]: Finished difference. Result has 116 places, 131 transitions, 1157 flow [2024-06-27 19:55:51,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=841, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1157, PETRI_PLACES=116, PETRI_TRANSITIONS=131} [2024-06-27 19:55:51,931 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 72 predicate places. [2024-06-27 19:55:51,932 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 131 transitions, 1157 flow [2024-06-27 19:55:51,932 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) [2024-06-27 19:55:51,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:51,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:51,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 19:55:51,932 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)] === [2024-06-27 19:55:51,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:51,932 INFO L85 PathProgramCache]: Analyzing trace with hash -146084175, now seen corresponding path program 3 times [2024-06-27 19:55:51,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:51,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858661543] [2024-06-27 19:55:51,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:51,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:51,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:52,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:52,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:52,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858661543] [2024-06-27 19:55:52,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858661543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:52,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:52,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:55:52,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116176963] [2024-06-27 19:55:52,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:52,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:55:52,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:52,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:55:52,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:55:52,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:55:52,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 131 transitions, 1157 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) [2024-06-27 19:55:52,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:52,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:55:52,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:53,675 INFO L124 PetriNetUnfolderBase]: 2088/3202 cut-off events. [2024-06-27 19:55:53,675 INFO L125 PetriNetUnfolderBase]: For 136091/136094 co-relation queries the response was YES. [2024-06-27 19:55:53,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21457 conditions, 3202 events. 2088/3202 cut-off events. For 136091/136094 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 16214 event pairs, 595 based on Foata normal form. 4/3203 useless extension candidates. Maximal degree in co-relation 21406. Up to 2675 conditions per place. [2024-06-27 19:55:53,695 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 100 selfloop transitions, 68 changer transitions 0/173 dead transitions. [2024-06-27 19:55:53,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 173 transitions, 1889 flow [2024-06-27 19:55:53,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:55:53,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:55:53,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-27 19:55:53,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48578811369509045 [2024-06-27 19:55:53,696 INFO L175 Difference]: Start difference. First operand has 116 places, 131 transitions, 1157 flow. Second operand 9 states and 188 transitions. [2024-06-27 19:55:53,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 173 transitions, 1889 flow [2024-06-27 19:55:53,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 173 transitions, 1775 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-27 19:55:53,749 INFO L231 Difference]: Finished difference. Result has 121 places, 134 transitions, 1249 flow [2024-06-27 19:55:53,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1057, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1249, PETRI_PLACES=121, PETRI_TRANSITIONS=134} [2024-06-27 19:55:53,749 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 77 predicate places. [2024-06-27 19:55:53,749 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 134 transitions, 1249 flow [2024-06-27 19:55:53,749 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) [2024-06-27 19:55:53,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:53,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:53,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 19:55:53,750 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)] === [2024-06-27 19:55:53,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:53,750 INFO L85 PathProgramCache]: Analyzing trace with hash -146257155, now seen corresponding path program 4 times [2024-06-27 19:55:53,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:53,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145814542] [2024-06-27 19:55:53,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:53,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:53,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:54,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:54,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:54,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145814542] [2024-06-27 19:55:54,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145814542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:54,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:54,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:55:54,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554385162] [2024-06-27 19:55:54,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:54,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:55:54,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:54,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:55:54,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:55:54,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:55:54,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 134 transitions, 1249 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) [2024-06-27 19:55:54,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:54,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:55:54,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:55,556 INFO L124 PetriNetUnfolderBase]: 2078/3193 cut-off events. [2024-06-27 19:55:55,557 INFO L125 PetriNetUnfolderBase]: For 141048/141051 co-relation queries the response was YES. [2024-06-27 19:55:55,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21579 conditions, 3193 events. 2078/3193 cut-off events. For 141048/141051 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 16250 event pairs, 598 based on Foata normal form. 4/3194 useless extension candidates. Maximal degree in co-relation 21526. Up to 2667 conditions per place. [2024-06-27 19:55:55,579 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 99 selfloop transitions, 67 changer transitions 0/171 dead transitions. [2024-06-27 19:55:55,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 171 transitions, 1795 flow [2024-06-27 19:55:55,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:55:55,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:55:55,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-27 19:55:55,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48320413436692505 [2024-06-27 19:55:55,580 INFO L175 Difference]: Start difference. First operand has 121 places, 134 transitions, 1249 flow. Second operand 9 states and 187 transitions. [2024-06-27 19:55:55,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 171 transitions, 1795 flow [2024-06-27 19:55:55,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 171 transitions, 1648 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-27 19:55:55,640 INFO L231 Difference]: Finished difference. Result has 125 places, 134 transitions, 1244 flow [2024-06-27 19:55:55,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1102, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1244, PETRI_PLACES=125, PETRI_TRANSITIONS=134} [2024-06-27 19:55:55,640 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 81 predicate places. [2024-06-27 19:55:55,640 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 134 transitions, 1244 flow [2024-06-27 19:55:55,641 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) [2024-06-27 19:55:55,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:55,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:55,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 19:55:55,641 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:55:55,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:55,641 INFO L85 PathProgramCache]: Analyzing trace with hash 594398166, now seen corresponding path program 1 times [2024-06-27 19:55:55,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:55,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822413964] [2024-06-27 19:55:55,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:55,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:55,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:56,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:56,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:56,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822413964] [2024-06-27 19:55:56,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822413964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:56,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:56,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:55:56,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395468328] [2024-06-27 19:55:56,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:56,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:55:56,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:56,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:55:56,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:55:56,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:55:56,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 134 transitions, 1244 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-27 19:55:56,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:56,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:55:56,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:56,787 INFO L124 PetriNetUnfolderBase]: 1796/2900 cut-off events. [2024-06-27 19:55:56,787 INFO L125 PetriNetUnfolderBase]: For 145808/145816 co-relation queries the response was YES. [2024-06-27 19:55:56,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20261 conditions, 2900 events. 1796/2900 cut-off events. For 145808/145816 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 15747 event pairs, 599 based on Foata normal form. 2/2893 useless extension candidates. Maximal degree in co-relation 20207. Up to 2608 conditions per place. [2024-06-27 19:55:56,808 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 112 selfloop transitions, 13 changer transitions 0/152 dead transitions. [2024-06-27 19:55:56,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 152 transitions, 1564 flow [2024-06-27 19:55:56,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:55:56,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:55:56,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-27 19:55:56,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-27 19:55:56,811 INFO L175 Difference]: Start difference. First operand has 125 places, 134 transitions, 1244 flow. Second operand 6 states and 123 transitions. [2024-06-27 19:55:56,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 152 transitions, 1564 flow [2024-06-27 19:55:56,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 152 transitions, 1390 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-27 19:55:56,870 INFO L231 Difference]: Finished difference. Result has 122 places, 137 transitions, 1141 flow [2024-06-27 19:55:56,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1070, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1141, PETRI_PLACES=122, PETRI_TRANSITIONS=137} [2024-06-27 19:55:56,870 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 78 predicate places. [2024-06-27 19:55:56,871 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 137 transitions, 1141 flow [2024-06-27 19:55:56,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-27 19:55:56,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:56,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:56,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 19:55:56,871 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:55:56,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:56,871 INFO L85 PathProgramCache]: Analyzing trace with hash -109661163, now seen corresponding path program 4 times [2024-06-27 19:55:56,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:56,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294669664] [2024-06-27 19:55:56,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:56,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:56,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:57,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:57,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:57,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294669664] [2024-06-27 19:55:57,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294669664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:57,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:57,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:55:57,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516340122] [2024-06-27 19:55:57,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:57,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:55:57,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:57,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:55:57,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:55:57,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:55:57,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 137 transitions, 1141 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:57,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:57,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:55:57,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:58,374 INFO L124 PetriNetUnfolderBase]: 1969/3079 cut-off events. [2024-06-27 19:55:58,374 INFO L125 PetriNetUnfolderBase]: For 152410/152410 co-relation queries the response was YES. [2024-06-27 19:55:58,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21218 conditions, 3079 events. 1969/3079 cut-off events. For 152410/152410 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 16018 event pairs, 617 based on Foata normal form. 4/3079 useless extension candidates. Maximal degree in co-relation 21163. Up to 2778 conditions per place. [2024-06-27 19:55:58,394 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 119 selfloop transitions, 28 changer transitions 0/163 dead transitions. [2024-06-27 19:55:58,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 163 transitions, 1545 flow [2024-06-27 19:55:58,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:55:58,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:55:58,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-27 19:55:58,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622093023255814 [2024-06-27 19:55:58,395 INFO L175 Difference]: Start difference. First operand has 122 places, 137 transitions, 1141 flow. Second operand 8 states and 159 transitions. [2024-06-27 19:55:58,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 163 transitions, 1545 flow [2024-06-27 19:55:58,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 163 transitions, 1498 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-27 19:55:58,460 INFO L231 Difference]: Finished difference. Result has 126 places, 139 transitions, 1211 flow [2024-06-27 19:55:58,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1094, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1211, PETRI_PLACES=126, PETRI_TRANSITIONS=139} [2024-06-27 19:55:58,460 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 82 predicate places. [2024-06-27 19:55:58,460 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 139 transitions, 1211 flow [2024-06-27 19:55:58,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:58,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:58,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:58,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 19:55:58,461 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)] === [2024-06-27 19:55:58,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:58,461 INFO L85 PathProgramCache]: Analyzing trace with hash 19554959, now seen corresponding path program 5 times [2024-06-27 19:55:58,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:58,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141239414] [2024-06-27 19:55:58,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:58,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:58,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:59,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:59,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:59,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141239414] [2024-06-27 19:55:59,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141239414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:59,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:59,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:55:59,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273226980] [2024-06-27 19:55:59,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:59,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:55:59,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:59,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:55:59,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:55:59,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:55:59,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 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) [2024-06-27 19:55:59,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:59,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:55:59,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:00,250 INFO L124 PetriNetUnfolderBase]: 2166/3338 cut-off events. [2024-06-27 19:56:00,250 INFO L125 PetriNetUnfolderBase]: For 170077/170077 co-relation queries the response was YES. [2024-06-27 19:56:00,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23402 conditions, 3338 events. 2166/3338 cut-off events. For 170077/170077 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 17111 event pairs, 600 based on Foata normal form. 4/3338 useless extension candidates. Maximal degree in co-relation 23346. Up to 2742 conditions per place. [2024-06-27 19:56:00,278 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 105 selfloop transitions, 76 changer transitions 0/186 dead transitions. [2024-06-27 19:56:00,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 186 transitions, 2260 flow [2024-06-27 19:56:00,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:56:00,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:56:00,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-27 19:56:00,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48578811369509045 [2024-06-27 19:56:00,280 INFO L175 Difference]: Start difference. First operand has 126 places, 139 transitions, 1211 flow. Second operand 9 states and 188 transitions. [2024-06-27 19:56:00,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 186 transitions, 2260 flow [2024-06-27 19:56:00,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 186 transitions, 2161 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-27 19:56:00,349 INFO L231 Difference]: Finished difference. Result has 129 places, 148 transitions, 1467 flow [2024-06-27 19:56:00,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1112, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1467, PETRI_PLACES=129, PETRI_TRANSITIONS=148} [2024-06-27 19:56:00,349 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 85 predicate places. [2024-06-27 19:56:00,349 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 148 transitions, 1467 flow [2024-06-27 19:56:00,350 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) [2024-06-27 19:56:00,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:00,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:00,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 19:56:00,350 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)] === [2024-06-27 19:56:00,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:00,350 INFO L85 PathProgramCache]: Analyzing trace with hash -800107239, now seen corresponding path program 6 times [2024-06-27 19:56:00,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:00,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3965445] [2024-06-27 19:56:00,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:00,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:00,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:01,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:01,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:01,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3965445] [2024-06-27 19:56:01,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3965445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:01,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:01,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:56:01,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916112341] [2024-06-27 19:56:01,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:01,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:56:01,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:01,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:56:01,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:56:01,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:01,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 148 transitions, 1467 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) [2024-06-27 19:56:01,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:01,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:01,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:02,135 INFO L124 PetriNetUnfolderBase]: 2220/3431 cut-off events. [2024-06-27 19:56:02,136 INFO L125 PetriNetUnfolderBase]: For 184060/184060 co-relation queries the response was YES. [2024-06-27 19:56:02,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24565 conditions, 3431 events. 2220/3431 cut-off events. For 184060/184060 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 17756 event pairs, 602 based on Foata normal form. 4/3431 useless extension candidates. Maximal degree in co-relation 24508. Up to 2788 conditions per place. [2024-06-27 19:56:02,159 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 101 selfloop transitions, 85 changer transitions 0/191 dead transitions. [2024-06-27 19:56:02,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 191 transitions, 2483 flow [2024-06-27 19:56:02,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:56:02,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:56:02,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-27 19:56:02,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4780361757105943 [2024-06-27 19:56:02,161 INFO L175 Difference]: Start difference. First operand has 129 places, 148 transitions, 1467 flow. Second operand 9 states and 185 transitions. [2024-06-27 19:56:02,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 191 transitions, 2483 flow [2024-06-27 19:56:02,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 191 transitions, 2201 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-27 19:56:02,242 INFO L231 Difference]: Finished difference. Result has 132 places, 154 transitions, 1505 flow [2024-06-27 19:56:02,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1207, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1505, PETRI_PLACES=132, PETRI_TRANSITIONS=154} [2024-06-27 19:56:02,242 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 88 predicate places. [2024-06-27 19:56:02,242 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 154 transitions, 1505 flow [2024-06-27 19:56:02,243 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) [2024-06-27 19:56:02,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:02,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:02,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 19:56:02,243 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)] === [2024-06-27 19:56:02,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:02,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1028008389, now seen corresponding path program 7 times [2024-06-27 19:56:02,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:02,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488331837] [2024-06-27 19:56:02,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:02,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:02,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:03,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:03,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:03,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488331837] [2024-06-27 19:56:03,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488331837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:03,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:03,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:56:03,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019084394] [2024-06-27 19:56:03,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:03,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:56:03,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:03,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:56:03,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:56:03,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:03,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 154 transitions, 1505 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) [2024-06-27 19:56:03,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:03,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:03,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:04,031 INFO L124 PetriNetUnfolderBase]: 2210/3417 cut-off events. [2024-06-27 19:56:04,032 INFO L125 PetriNetUnfolderBase]: For 187021/187021 co-relation queries the response was YES. [2024-06-27 19:56:04,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24378 conditions, 3417 events. 2210/3417 cut-off events. For 187021/187021 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 17733 event pairs, 600 based on Foata normal form. 4/3417 useless extension candidates. Maximal degree in co-relation 24320. Up to 2780 conditions per place. [2024-06-27 19:56:04,058 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 101 selfloop transitions, 83 changer transitions 0/189 dead transitions. [2024-06-27 19:56:04,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 189 transitions, 2241 flow [2024-06-27 19:56:04,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:56:04,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:56:04,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-27 19:56:04,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4754521963824289 [2024-06-27 19:56:04,059 INFO L175 Difference]: Start difference. First operand has 132 places, 154 transitions, 1505 flow. Second operand 9 states and 184 transitions. [2024-06-27 19:56:04,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 189 transitions, 2241 flow [2024-06-27 19:56:04,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 189 transitions, 1973 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-27 19:56:04,154 INFO L231 Difference]: Finished difference. Result has 135 places, 154 transitions, 1411 flow [2024-06-27 19:56:04,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1237, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1411, PETRI_PLACES=135, PETRI_TRANSITIONS=154} [2024-06-27 19:56:04,154 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 91 predicate places. [2024-06-27 19:56:04,154 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 154 transitions, 1411 flow [2024-06-27 19:56:04,154 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) [2024-06-27 19:56:04,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:04,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:04,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 19:56:04,155 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)] === [2024-06-27 19:56:04,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:04,155 INFO L85 PathProgramCache]: Analyzing trace with hash -791833029, now seen corresponding path program 8 times [2024-06-27 19:56:04,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:04,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299101842] [2024-06-27 19:56:04,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:04,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:04,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:04,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:04,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:04,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299101842] [2024-06-27 19:56:04,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299101842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:04,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:04,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:56:04,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881571208] [2024-06-27 19:56:04,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:04,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:56:04,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:04,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:56:04,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:56:05,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:05,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 154 transitions, 1411 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) [2024-06-27 19:56:05,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:05,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:05,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:05,964 INFO L124 PetriNetUnfolderBase]: 2200/3403 cut-off events. [2024-06-27 19:56:05,964 INFO L125 PetriNetUnfolderBase]: For 191540/191540 co-relation queries the response was YES. [2024-06-27 19:56:05,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24108 conditions, 3403 events. 2200/3403 cut-off events. For 191540/191540 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 17633 event pairs, 605 based on Foata normal form. 4/3403 useless extension candidates. Maximal degree in co-relation 24049. Up to 2772 conditions per place. [2024-06-27 19:56:05,986 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 89 selfloop transitions, 92 changer transitions 0/186 dead transitions. [2024-06-27 19:56:05,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 186 transitions, 1997 flow [2024-06-27 19:56:05,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:56:05,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:56:05,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-27 19:56:05,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4599483204134367 [2024-06-27 19:56:05,987 INFO L175 Difference]: Start difference. First operand has 135 places, 154 transitions, 1411 flow. Second operand 9 states and 178 transitions. [2024-06-27 19:56:05,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 186 transitions, 1997 flow [2024-06-27 19:56:06,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 186 transitions, 1797 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-27 19:56:06,067 INFO L231 Difference]: Finished difference. Result has 137 places, 154 transitions, 1403 flow [2024-06-27 19:56:06,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1211, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1403, PETRI_PLACES=137, PETRI_TRANSITIONS=154} [2024-06-27 19:56:06,067 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 93 predicate places. [2024-06-27 19:56:06,067 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 154 transitions, 1403 flow [2024-06-27 19:56:06,068 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) [2024-06-27 19:56:06,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:06,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:06,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 19:56:06,068 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)] === [2024-06-27 19:56:06,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:06,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1028187879, now seen corresponding path program 9 times [2024-06-27 19:56:06,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:06,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684990612] [2024-06-27 19:56:06,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:06,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:06,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:06,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:06,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:06,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684990612] [2024-06-27 19:56:06,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684990612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:06,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:06,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:56:06,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312228514] [2024-06-27 19:56:06,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:06,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:56:06,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:06,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:56:06,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:56:06,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:06,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 154 transitions, 1403 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) [2024-06-27 19:56:06,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:06,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:06,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:07,804 INFO L124 PetriNetUnfolderBase]: 2190/3389 cut-off events. [2024-06-27 19:56:07,804 INFO L125 PetriNetUnfolderBase]: For 197365/197365 co-relation queries the response was YES. [2024-06-27 19:56:07,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24061 conditions, 3389 events. 2190/3389 cut-off events. For 197365/197365 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 17551 event pairs, 593 based on Foata normal form. 4/3389 useless extension candidates. Maximal degree in co-relation 24001. Up to 2764 conditions per place. [2024-06-27 19:56:07,830 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 97 selfloop transitions, 85 changer transitions 0/187 dead transitions. [2024-06-27 19:56:07,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 187 transitions, 1997 flow [2024-06-27 19:56:07,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:56:07,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:56:07,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-27 19:56:07,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46770025839793283 [2024-06-27 19:56:07,832 INFO L175 Difference]: Start difference. First operand has 137 places, 154 transitions, 1403 flow. Second operand 9 states and 181 transitions. [2024-06-27 19:56:07,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 187 transitions, 1997 flow [2024-06-27 19:56:07,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 187 transitions, 1763 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-27 19:56:07,913 INFO L231 Difference]: Finished difference. Result has 138 places, 154 transitions, 1347 flow [2024-06-27 19:56:07,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1169, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1347, PETRI_PLACES=138, PETRI_TRANSITIONS=154} [2024-06-27 19:56:07,913 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 94 predicate places. [2024-06-27 19:56:07,913 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 154 transitions, 1347 flow [2024-06-27 19:56:07,913 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) [2024-06-27 19:56:07,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:07,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:07,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 19:56:07,914 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:56:07,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:07,914 INFO L85 PathProgramCache]: Analyzing trace with hash -800113749, now seen corresponding path program 10 times [2024-06-27 19:56:07,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:07,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575682455] [2024-06-27 19:56:07,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:07,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:07,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:08,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:08,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:08,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575682455] [2024-06-27 19:56:08,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575682455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:08,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:08,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:56:08,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694603461] [2024-06-27 19:56:08,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:08,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:56:08,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:08,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:56:08,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:56:08,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:08,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 154 transitions, 1347 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) [2024-06-27 19:56:08,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:08,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:08,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:09,653 INFO L124 PetriNetUnfolderBase]: 2180/3375 cut-off events. [2024-06-27 19:56:09,653 INFO L125 PetriNetUnfolderBase]: For 203267/203267 co-relation queries the response was YES. [2024-06-27 19:56:09,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23934 conditions, 3375 events. 2180/3375 cut-off events. For 203267/203267 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 17431 event pairs, 596 based on Foata normal form. 4/3375 useless extension candidates. Maximal degree in co-relation 23873. Up to 2756 conditions per place. [2024-06-27 19:56:09,674 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 94 selfloop transitions, 86 changer transitions 0/185 dead transitions. [2024-06-27 19:56:09,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 185 transitions, 1783 flow [2024-06-27 19:56:09,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:56:09,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:56:09,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-27 19:56:09,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4599483204134367 [2024-06-27 19:56:09,675 INFO L175 Difference]: Start difference. First operand has 138 places, 154 transitions, 1347 flow. Second operand 9 states and 178 transitions. [2024-06-27 19:56:09,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 185 transitions, 1783 flow [2024-06-27 19:56:09,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 185 transitions, 1581 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-27 19:56:09,766 INFO L231 Difference]: Finished difference. Result has 139 places, 154 transitions, 1325 flow [2024-06-27 19:56:09,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1145, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1325, PETRI_PLACES=139, PETRI_TRANSITIONS=154} [2024-06-27 19:56:09,766 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 95 predicate places. [2024-06-27 19:56:09,766 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 154 transitions, 1325 flow [2024-06-27 19:56:09,766 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) [2024-06-27 19:56:09,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:09,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:09,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 19:56:09,767 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)] === [2024-06-27 19:56:09,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:09,767 INFO L85 PathProgramCache]: Analyzing trace with hash 607730646, now seen corresponding path program 2 times [2024-06-27 19:56:09,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:09,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498861316] [2024-06-27 19:56:09,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:09,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:09,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:10,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:10,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:10,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498861316] [2024-06-27 19:56:10,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498861316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:10,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:10,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:56:10,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938016295] [2024-06-27 19:56:10,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:10,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:56:10,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:10,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:56:10,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:56:10,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:56:10,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 154 transitions, 1325 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-27 19:56:10,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:10,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:56:10,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:10,927 INFO L124 PetriNetUnfolderBase]: 1853/3001 cut-off events. [2024-06-27 19:56:10,927 INFO L125 PetriNetUnfolderBase]: For 206480/206480 co-relation queries the response was YES. [2024-06-27 19:56:10,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22337 conditions, 3001 events. 1853/3001 cut-off events. For 206480/206480 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 16462 event pairs, 602 based on Foata normal form. 1/2976 useless extension candidates. Maximal degree in co-relation 22275. Up to 2685 conditions per place. [2024-06-27 19:56:10,952 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 121 selfloop transitions, 18 changer transitions 0/166 dead transitions. [2024-06-27 19:56:10,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 166 transitions, 1663 flow [2024-06-27 19:56:10,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:56:10,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:56:10,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-27 19:56:10,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46124031007751937 [2024-06-27 19:56:10,954 INFO L175 Difference]: Start difference. First operand has 139 places, 154 transitions, 1325 flow. Second operand 6 states and 119 transitions. [2024-06-27 19:56:10,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 166 transitions, 1663 flow [2024-06-27 19:56:11,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 166 transitions, 1459 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 19:56:11,057 INFO L231 Difference]: Finished difference. Result has 136 places, 157 transitions, 1207 flow [2024-06-27 19:56:11,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1121, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1207, PETRI_PLACES=136, PETRI_TRANSITIONS=157} [2024-06-27 19:56:11,057 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 92 predicate places. [2024-06-27 19:56:11,057 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 157 transitions, 1207 flow [2024-06-27 19:56:11,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-27 19:56:11,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:11,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:11,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 19:56:11,058 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)] === [2024-06-27 19:56:11,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:11,058 INFO L85 PathProgramCache]: Analyzing trace with hash 600118038, now seen corresponding path program 1 times [2024-06-27 19:56:11,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:11,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850513005] [2024-06-27 19:56:11,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:11,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:11,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:11,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:11,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:11,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850513005] [2024-06-27 19:56:11,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850513005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:11,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:11,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:56:11,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626093804] [2024-06-27 19:56:11,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:11,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:56:11,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:11,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:56:11,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:56:11,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:56:11,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 157 transitions, 1207 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-27 19:56:11,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:11,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:56:11,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:12,139 INFO L124 PetriNetUnfolderBase]: 1831/3010 cut-off events. [2024-06-27 19:56:12,139 INFO L125 PetriNetUnfolderBase]: For 182967/182967 co-relation queries the response was YES. [2024-06-27 19:56:12,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20913 conditions, 3010 events. 1831/3010 cut-off events. For 182967/182967 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 16574 event pairs, 523 based on Foata normal form. 1/3010 useless extension candidates. Maximal degree in co-relation 20850. Up to 2675 conditions per place. [2024-06-27 19:56:12,159 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 144 selfloop transitions, 11 changer transitions 0/172 dead transitions. [2024-06-27 19:56:12,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 172 transitions, 1585 flow [2024-06-27 19:56:12,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:56:12,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:56:12,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-27 19:56:12,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 19:56:12,160 INFO L175 Difference]: Start difference. First operand has 136 places, 157 transitions, 1207 flow. Second operand 6 states and 120 transitions. [2024-06-27 19:56:12,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 172 transitions, 1585 flow [2024-06-27 19:56:12,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 172 transitions, 1521 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 19:56:12,237 INFO L231 Difference]: Finished difference. Result has 138 places, 160 transitions, 1215 flow [2024-06-27 19:56:12,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1143, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1215, PETRI_PLACES=138, PETRI_TRANSITIONS=160} [2024-06-27 19:56:12,238 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 94 predicate places. [2024-06-27 19:56:12,238 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 160 transitions, 1215 flow [2024-06-27 19:56:12,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-27 19:56:12,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:12,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:12,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 19:56:12,238 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)] === [2024-06-27 19:56:12,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:12,239 INFO L85 PathProgramCache]: Analyzing trace with hash -791525199, now seen corresponding path program 1 times [2024-06-27 19:56:12,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:12,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387680318] [2024-06-27 19:56:12,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:12,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:12,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:13,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:13,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:13,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387680318] [2024-06-27 19:56:13,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387680318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:13,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:13,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:56:13,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44415451] [2024-06-27 19:56:13,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:13,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:56:13,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:13,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:56:13,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:56:13,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:56:13,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 160 transitions, 1215 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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) [2024-06-27 19:56:13,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:13,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:56:13,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:14,085 INFO L124 PetriNetUnfolderBase]: 1930/3103 cut-off events. [2024-06-27 19:56:14,085 INFO L125 PetriNetUnfolderBase]: For 190099/190099 co-relation queries the response was YES. [2024-06-27 19:56:14,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21606 conditions, 3103 events. 1930/3103 cut-off events. For 190099/190099 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 16604 event pairs, 513 based on Foata normal form. 4/3106 useless extension candidates. Maximal degree in co-relation 21542. Up to 2813 conditions per place. [2024-06-27 19:56:14,109 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 168 selfloop transitions, 19 changer transitions 0/193 dead transitions. [2024-06-27 19:56:14,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 193 transitions, 1727 flow [2024-06-27 19:56:14,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:56:14,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:56:14,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-27 19:56:14,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-27 19:56:14,110 INFO L175 Difference]: Start difference. First operand has 138 places, 160 transitions, 1215 flow. Second operand 9 states and 173 transitions. [2024-06-27 19:56:14,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 193 transitions, 1727 flow [2024-06-27 19:56:14,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 193 transitions, 1677 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 19:56:14,202 INFO L231 Difference]: Finished difference. Result has 144 places, 165 transitions, 1288 flow [2024-06-27 19:56:14,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1165, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1288, PETRI_PLACES=144, PETRI_TRANSITIONS=165} [2024-06-27 19:56:14,203 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 100 predicate places. [2024-06-27 19:56:14,203 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 165 transitions, 1288 flow [2024-06-27 19:56:14,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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) [2024-06-27 19:56:14,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:14,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:14,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 19:56:14,203 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:56:14,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:14,204 INFO L85 PathProgramCache]: Analyzing trace with hash 607736598, now seen corresponding path program 2 times [2024-06-27 19:56:14,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:14,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943029170] [2024-06-27 19:56:14,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:14,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:14,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:14,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:14,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:14,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943029170] [2024-06-27 19:56:14,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943029170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:14,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:14,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:56:14,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406009826] [2024-06-27 19:56:14,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:14,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:56:14,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:14,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:56:14,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:56:14,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:56:14,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 165 transitions, 1288 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-27 19:56:14,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:14,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:56:14,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:15,304 INFO L124 PetriNetUnfolderBase]: 1820/2993 cut-off events. [2024-06-27 19:56:15,304 INFO L125 PetriNetUnfolderBase]: For 195096/195099 co-relation queries the response was YES. [2024-06-27 19:56:15,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21533 conditions, 2993 events. 1820/2993 cut-off events. For 195096/195099 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 16501 event pairs, 503 based on Foata normal form. 3/2994 useless extension candidates. Maximal degree in co-relation 21467. Up to 2653 conditions per place. [2024-06-27 19:56:15,326 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 144 selfloop transitions, 16 changer transitions 0/177 dead transitions. [2024-06-27 19:56:15,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 177 transitions, 1676 flow [2024-06-27 19:56:15,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:56:15,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:56:15,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-27 19:56:15,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46124031007751937 [2024-06-27 19:56:15,328 INFO L175 Difference]: Start difference. First operand has 144 places, 165 transitions, 1288 flow. Second operand 6 states and 119 transitions. [2024-06-27 19:56:15,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 177 transitions, 1676 flow [2024-06-27 19:56:15,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 177 transitions, 1593 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-27 19:56:15,422 INFO L231 Difference]: Finished difference. Result has 144 places, 168 transitions, 1295 flow [2024-06-27 19:56:15,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1205, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1295, PETRI_PLACES=144, PETRI_TRANSITIONS=168} [2024-06-27 19:56:15,423 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 100 predicate places. [2024-06-27 19:56:15,423 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 168 transitions, 1295 flow [2024-06-27 19:56:15,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-27 19:56:15,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:15,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:15,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 19:56:15,423 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)] === [2024-06-27 19:56:15,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:15,424 INFO L85 PathProgramCache]: Analyzing trace with hash 393218633, now seen corresponding path program 1 times [2024-06-27 19:56:15,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:15,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495901954] [2024-06-27 19:56:15,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:15,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:15,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:16,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:16,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:16,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495901954] [2024-06-27 19:56:16,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495901954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:16,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:16,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:56:16,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737439322] [2024-06-27 19:56:16,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:16,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:56:16,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:16,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:56:16,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:56:16,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:16,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 168 transitions, 1295 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) [2024-06-27 19:56:16,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:16,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:16,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:17,119 INFO L124 PetriNetUnfolderBase]: 2210/3421 cut-off events. [2024-06-27 19:56:17,119 INFO L125 PetriNetUnfolderBase]: For 248258/248258 co-relation queries the response was YES. [2024-06-27 19:56:17,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25847 conditions, 3421 events. 2210/3421 cut-off events. For 248258/248258 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 17626 event pairs, 418 based on Foata normal form. 4/3424 useless extension candidates. Maximal degree in co-relation 25780. Up to 3098 conditions per place. [2024-06-27 19:56:17,145 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 184 selfloop transitions, 25 changer transitions 0/214 dead transitions. [2024-06-27 19:56:17,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 214 transitions, 2085 flow [2024-06-27 19:56:17,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:56:17,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:56:17,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-27 19:56:17,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44883720930232557 [2024-06-27 19:56:17,146 INFO L175 Difference]: Start difference. First operand has 144 places, 168 transitions, 1295 flow. Second operand 10 states and 193 transitions. [2024-06-27 19:56:17,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 214 transitions, 2085 flow [2024-06-27 19:56:17,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 214 transitions, 2017 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-27 19:56:17,295 INFO L231 Difference]: Finished difference. Result has 150 places, 172 transitions, 1388 flow [2024-06-27 19:56:17,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1227, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1388, PETRI_PLACES=150, PETRI_TRANSITIONS=172} [2024-06-27 19:56:17,296 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 106 predicate places. [2024-06-27 19:56:17,296 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 172 transitions, 1388 flow [2024-06-27 19:56:17,296 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) [2024-06-27 19:56:17,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:17,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:17,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 19:56:17,296 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:56:17,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:17,297 INFO L85 PathProgramCache]: Analyzing trace with hash -377684783, now seen corresponding path program 2 times [2024-06-27 19:56:17,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:17,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565143834] [2024-06-27 19:56:17,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:17,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:17,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:18,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:18,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:18,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565143834] [2024-06-27 19:56:18,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565143834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:18,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:18,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:56:18,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117272857] [2024-06-27 19:56:18,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:18,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:56:18,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:18,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:56:18,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:56:18,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:18,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 172 transitions, 1388 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) [2024-06-27 19:56:18,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:18,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:18,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:19,014 INFO L124 PetriNetUnfolderBase]: 2227/3448 cut-off events. [2024-06-27 19:56:19,014 INFO L125 PetriNetUnfolderBase]: For 260438/260438 co-relation queries the response was YES. [2024-06-27 19:56:19,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26483 conditions, 3448 events. 2227/3448 cut-off events. For 260438/260438 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 17811 event pairs, 577 based on Foata normal form. 4/3451 useless extension candidates. Maximal degree in co-relation 26415. Up to 3188 conditions per place. [2024-06-27 19:56:19,039 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 184 selfloop transitions, 22 changer transitions 0/211 dead transitions. [2024-06-27 19:56:19,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 211 transitions, 2118 flow [2024-06-27 19:56:19,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:56:19,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:56:19,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-27 19:56:19,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-27 19:56:19,040 INFO L175 Difference]: Start difference. First operand has 150 places, 172 transitions, 1388 flow. Second operand 9 states and 175 transitions. [2024-06-27 19:56:19,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 211 transitions, 2118 flow [2024-06-27 19:56:19,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 211 transitions, 2017 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-27 19:56:19,203 INFO L231 Difference]: Finished difference. Result has 153 places, 174 transitions, 1392 flow [2024-06-27 19:56:19,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1303, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1392, PETRI_PLACES=153, PETRI_TRANSITIONS=174} [2024-06-27 19:56:19,204 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 109 predicate places. [2024-06-27 19:56:19,204 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 174 transitions, 1392 flow [2024-06-27 19:56:19,204 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) [2024-06-27 19:56:19,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:19,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:19,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 19:56:19,206 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)] === [2024-06-27 19:56:19,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:19,207 INFO L85 PathProgramCache]: Analyzing trace with hash 395096303, now seen corresponding path program 3 times [2024-06-27 19:56:19,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:19,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239321296] [2024-06-27 19:56:19,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:19,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:19,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:20,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:20,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:20,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239321296] [2024-06-27 19:56:20,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239321296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:20,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:20,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:56:20,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069562978] [2024-06-27 19:56:20,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:20,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:56:20,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:20,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:56:20,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:56:20,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:20,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 174 transitions, 1392 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) [2024-06-27 19:56:20,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:20,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:20,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:20,869 INFO L124 PetriNetUnfolderBase]: 2219/3436 cut-off events. [2024-06-27 19:56:20,869 INFO L125 PetriNetUnfolderBase]: For 267380/267380 co-relation queries the response was YES. [2024-06-27 19:56:20,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26345 conditions, 3436 events. 2219/3436 cut-off events. For 267380/267380 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 17745 event pairs, 580 based on Foata normal form. 4/3439 useless extension candidates. Maximal degree in co-relation 26275. Up to 3223 conditions per place. [2024-06-27 19:56:20,901 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 184 selfloop transitions, 19 changer transitions 0/208 dead transitions. [2024-06-27 19:56:20,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 208 transitions, 1884 flow [2024-06-27 19:56:20,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:56:20,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:56:20,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 19:56:20,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 19:56:20,902 INFO L175 Difference]: Start difference. First operand has 153 places, 174 transitions, 1392 flow. Second operand 9 states and 171 transitions. [2024-06-27 19:56:20,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 208 transitions, 1884 flow [2024-06-27 19:56:21,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 208 transitions, 1781 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-27 19:56:21,068 INFO L231 Difference]: Finished difference. Result has 155 places, 174 transitions, 1334 flow [2024-06-27 19:56:21,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1289, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1334, PETRI_PLACES=155, PETRI_TRANSITIONS=174} [2024-06-27 19:56:21,068 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 111 predicate places. [2024-06-27 19:56:21,069 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 174 transitions, 1334 flow [2024-06-27 19:56:21,069 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) [2024-06-27 19:56:21,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:21,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:21,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 19:56:21,069 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)] === [2024-06-27 19:56:21,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:21,069 INFO L85 PathProgramCache]: Analyzing trace with hash -762359269, now seen corresponding path program 4 times [2024-06-27 19:56:21,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:21,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204011315] [2024-06-27 19:56:21,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:21,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:21,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:21,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:21,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:21,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204011315] [2024-06-27 19:56:21,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204011315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:21,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:21,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:56:21,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470854983] [2024-06-27 19:56:21,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:21,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:56:21,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:21,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:56:21,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:56:22,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:22,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 174 transitions, 1334 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) [2024-06-27 19:56:22,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:22,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:22,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:22,808 INFO L124 PetriNetUnfolderBase]: 2236/3465 cut-off events. [2024-06-27 19:56:22,808 INFO L125 PetriNetUnfolderBase]: For 278268/278271 co-relation queries the response was YES. [2024-06-27 19:56:22,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26620 conditions, 3465 events. 2236/3465 cut-off events. For 278268/278271 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 17900 event pairs, 588 based on Foata normal form. 6/3468 useless extension candidates. Maximal degree in co-relation 26549. Up to 3124 conditions per place. [2024-06-27 19:56:22,835 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 150 selfloop transitions, 52 changer transitions 0/207 dead transitions. [2024-06-27 19:56:22,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 207 transitions, 1870 flow [2024-06-27 19:56:22,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:56:22,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:56:22,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-27 19:56:22,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-27 19:56:22,836 INFO L175 Difference]: Start difference. First operand has 155 places, 174 transitions, 1334 flow. Second operand 9 states and 175 transitions. [2024-06-27 19:56:22,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 207 transitions, 1870 flow [2024-06-27 19:56:22,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 207 transitions, 1827 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-27 19:56:22,985 INFO L231 Difference]: Finished difference. Result has 156 places, 176 transitions, 1460 flow [2024-06-27 19:56:22,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1291, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1460, PETRI_PLACES=156, PETRI_TRANSITIONS=176} [2024-06-27 19:56:22,986 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 112 predicate places. [2024-06-27 19:56:22,986 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 176 transitions, 1460 flow [2024-06-27 19:56:22,986 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) [2024-06-27 19:56:22,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:22,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:22,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 19:56:22,986 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)] === [2024-06-27 19:56:22,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:22,986 INFO L85 PathProgramCache]: Analyzing trace with hash 56986661, now seen corresponding path program 5 times [2024-06-27 19:56:22,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:22,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426554386] [2024-06-27 19:56:22,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:22,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:22,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:23,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:23,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:23,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426554386] [2024-06-27 19:56:23,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426554386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:23,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:23,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:56:23,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868028733] [2024-06-27 19:56:23,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:23,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:56:23,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:23,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:56:23,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:56:23,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:23,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 176 transitions, 1460 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) [2024-06-27 19:56:23,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:23,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:23,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:24,798 INFO L124 PetriNetUnfolderBase]: 2253/3492 cut-off events. [2024-06-27 19:56:24,798 INFO L125 PetriNetUnfolderBase]: For 290988/290991 co-relation queries the response was YES. [2024-06-27 19:56:24,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27325 conditions, 3492 events. 2253/3492 cut-off events. For 290988/290991 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 18103 event pairs, 593 based on Foata normal form. 6/3495 useless extension candidates. Maximal degree in co-relation 27253. Up to 3151 conditions per place. [2024-06-27 19:56:24,824 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 153 selfloop transitions, 51 changer transitions 0/209 dead transitions. [2024-06-27 19:56:24,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 209 transitions, 2004 flow [2024-06-27 19:56:24,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:56:24,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:56:24,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-27 19:56:24,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45478036175710596 [2024-06-27 19:56:24,826 INFO L175 Difference]: Start difference. First operand has 156 places, 176 transitions, 1460 flow. Second operand 9 states and 176 transitions. [2024-06-27 19:56:24,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 209 transitions, 2004 flow [2024-06-27 19:56:24,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 209 transitions, 1853 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-27 19:56:24,983 INFO L231 Difference]: Finished difference. Result has 158 places, 178 transitions, 1480 flow [2024-06-27 19:56:24,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1309, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1480, PETRI_PLACES=158, PETRI_TRANSITIONS=178} [2024-06-27 19:56:24,983 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 114 predicate places. [2024-06-27 19:56:24,983 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 178 transitions, 1480 flow [2024-06-27 19:56:24,984 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) [2024-06-27 19:56:24,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:24,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:24,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 19:56:24,984 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)] === [2024-06-27 19:56:24,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:24,984 INFO L85 PathProgramCache]: Analyzing trace with hash -239156633, now seen corresponding path program 6 times [2024-06-27 19:56:24,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:24,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954636574] [2024-06-27 19:56:24,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:24,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:24,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:25,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:25,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:25,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954636574] [2024-06-27 19:56:25,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954636574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:25,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:25,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:56:25,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432215011] [2024-06-27 19:56:25,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:25,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:56:25,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:25,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:56:25,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:56:25,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:25,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 178 transitions, 1480 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) [2024-06-27 19:56:25,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:25,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:25,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:26,697 INFO L124 PetriNetUnfolderBase]: 2270/3519 cut-off events. [2024-06-27 19:56:26,698 INFO L125 PetriNetUnfolderBase]: For 303247/303250 co-relation queries the response was YES. [2024-06-27 19:56:26,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27803 conditions, 3519 events. 2270/3519 cut-off events. For 303247/303250 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 18342 event pairs, 588 based on Foata normal form. 6/3522 useless extension candidates. Maximal degree in co-relation 27730. Up to 3119 conditions per place. [2024-06-27 19:56:26,726 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 151 selfloop transitions, 56 changer transitions 0/212 dead transitions. [2024-06-27 19:56:26,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 212 transitions, 2036 flow [2024-06-27 19:56:26,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:56:26,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:56:26,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-27 19:56:26,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-27 19:56:26,727 INFO L175 Difference]: Start difference. First operand has 158 places, 178 transitions, 1480 flow. Second operand 9 states and 177 transitions. [2024-06-27 19:56:26,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 212 transitions, 2036 flow [2024-06-27 19:56:26,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 212 transitions, 1883 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-27 19:56:26,910 INFO L231 Difference]: Finished difference. Result has 160 places, 180 transitions, 1512 flow [2024-06-27 19:56:26,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1327, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1512, PETRI_PLACES=160, PETRI_TRANSITIONS=180} [2024-06-27 19:56:26,911 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 116 predicate places. [2024-06-27 19:56:26,911 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 180 transitions, 1512 flow [2024-06-27 19:56:26,911 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) [2024-06-27 19:56:26,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:26,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:26,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 19:56:26,911 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)] === [2024-06-27 19:56:26,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:26,911 INFO L85 PathProgramCache]: Analyzing trace with hash 781151836, now seen corresponding path program 1 times [2024-06-27 19:56:26,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:26,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722765275] [2024-06-27 19:56:26,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:26,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:26,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:27,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:27,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:27,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722765275] [2024-06-27 19:56:27,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722765275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:27,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:27,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:56:27,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030653412] [2024-06-27 19:56:27,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:27,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:56:27,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:27,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:56:27,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:56:27,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:56:27,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 180 transitions, 1512 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:27,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:27,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:56:27,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:28,491 INFO L124 PetriNetUnfolderBase]: 1938/3160 cut-off events. [2024-06-27 19:56:28,491 INFO L125 PetriNetUnfolderBase]: For 309838/309852 co-relation queries the response was YES. [2024-06-27 19:56:28,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26126 conditions, 3160 events. 1938/3160 cut-off events. For 309838/309852 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 17547 event pairs, 563 based on Foata normal form. 4/3143 useless extension candidates. Maximal degree in co-relation 26052. Up to 2782 conditions per place. [2024-06-27 19:56:28,520 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 150 selfloop transitions, 16 changer transitions 0/199 dead transitions. [2024-06-27 19:56:28,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 199 transitions, 1922 flow [2024-06-27 19:56:28,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:56:28,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:56:28,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-27 19:56:28,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46179401993355484 [2024-06-27 19:56:28,521 INFO L175 Difference]: Start difference. First operand has 160 places, 180 transitions, 1512 flow. Second operand 7 states and 139 transitions. [2024-06-27 19:56:28,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 199 transitions, 1922 flow [2024-06-27 19:56:28,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 199 transitions, 1755 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-27 19:56:28,706 INFO L231 Difference]: Finished difference. Result has 160 places, 183 transitions, 1427 flow [2024-06-27 19:56:28,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1345, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1427, PETRI_PLACES=160, PETRI_TRANSITIONS=183} [2024-06-27 19:56:28,706 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 116 predicate places. [2024-06-27 19:56:28,706 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 183 transitions, 1427 flow [2024-06-27 19:56:28,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:28,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:28,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:28,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 19:56:28,707 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:56:28,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:28,707 INFO L85 PathProgramCache]: Analyzing trace with hash 900983129, now seen corresponding path program 7 times [2024-06-27 19:56:28,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:28,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909037343] [2024-06-27 19:56:28,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:28,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:28,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:29,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:29,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:29,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909037343] [2024-06-27 19:56:29,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909037343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:29,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:29,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:56:29,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863960404] [2024-06-27 19:56:29,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:29,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:56:29,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:29,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:56:29,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:56:29,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:29,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 183 transitions, 1427 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) [2024-06-27 19:56:29,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:29,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:29,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:30,557 INFO L124 PetriNetUnfolderBase]: 2297/3559 cut-off events. [2024-06-27 19:56:30,557 INFO L125 PetriNetUnfolderBase]: For 325295/325295 co-relation queries the response was YES. [2024-06-27 19:56:30,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28617 conditions, 3559 events. 2297/3559 cut-off events. For 325295/325295 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 18489 event pairs, 598 based on Foata normal form. 4/3559 useless extension candidates. Maximal degree in co-relation 28542. Up to 3219 conditions per place. [2024-06-27 19:56:30,589 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 157 selfloop transitions, 51 changer transitions 0/213 dead transitions. [2024-06-27 19:56:30,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 213 transitions, 1979 flow [2024-06-27 19:56:30,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:56:30,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:56:30,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-27 19:56:30,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-27 19:56:30,590 INFO L175 Difference]: Start difference. First operand has 160 places, 183 transitions, 1427 flow. Second operand 9 states and 173 transitions. [2024-06-27 19:56:30,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 213 transitions, 1979 flow [2024-06-27 19:56:30,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 213 transitions, 1919 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 19:56:30,789 INFO L231 Difference]: Finished difference. Result has 164 places, 185 transitions, 1546 flow [2024-06-27 19:56:30,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1367, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1546, PETRI_PLACES=164, PETRI_TRANSITIONS=185} [2024-06-27 19:56:30,790 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 120 predicate places. [2024-06-27 19:56:30,790 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 185 transitions, 1546 flow [2024-06-27 19:56:30,790 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) [2024-06-27 19:56:30,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:30,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:30,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 19:56:30,790 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)] === [2024-06-27 19:56:30,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:30,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1809057431, now seen corresponding path program 8 times [2024-06-27 19:56:30,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:30,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519399794] [2024-06-27 19:56:30,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:30,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:30,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:31,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:31,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:31,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519399794] [2024-06-27 19:56:31,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519399794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:31,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:31,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:56:31,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362604032] [2024-06-27 19:56:31,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:31,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:56:31,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:31,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:56:31,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:56:31,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:31,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 185 transitions, 1546 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) [2024-06-27 19:56:31,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:31,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:31,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:32,576 INFO L124 PetriNetUnfolderBase]: 2314/3586 cut-off events. [2024-06-27 19:56:32,577 INFO L125 PetriNetUnfolderBase]: For 339531/339531 co-relation queries the response was YES. [2024-06-27 19:56:32,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29349 conditions, 3586 events. 2314/3586 cut-off events. For 339531/339531 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 18698 event pairs, 603 based on Foata normal form. 4/3586 useless extension candidates. Maximal degree in co-relation 29273. Up to 3246 conditions per place. [2024-06-27 19:56:32,609 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 158 selfloop transitions, 52 changer transitions 0/215 dead transitions. [2024-06-27 19:56:32,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 215 transitions, 2106 flow [2024-06-27 19:56:32,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:56:32,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:56:32,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-27 19:56:32,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 19:56:32,610 INFO L175 Difference]: Start difference. First operand has 164 places, 185 transitions, 1546 flow. Second operand 9 states and 172 transitions. [2024-06-27 19:56:32,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 215 transitions, 2106 flow [2024-06-27 19:56:32,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 215 transitions, 1945 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-27 19:56:32,852 INFO L231 Difference]: Finished difference. Result has 166 places, 187 transitions, 1570 flow [2024-06-27 19:56:32,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1385, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1570, PETRI_PLACES=166, PETRI_TRANSITIONS=187} [2024-06-27 19:56:32,853 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 122 predicate places. [2024-06-27 19:56:32,853 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 187 transitions, 1570 flow [2024-06-27 19:56:32,853 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) [2024-06-27 19:56:32,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:32,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:32,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 19:56:32,853 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)] === [2024-06-27 19:56:32,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:32,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1809205301, now seen corresponding path program 9 times [2024-06-27 19:56:32,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:32,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273817422] [2024-06-27 19:56:32,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:32,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:32,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:33,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:33,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:33,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273817422] [2024-06-27 19:56:33,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273817422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:33,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:33,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:56:33,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374735585] [2024-06-27 19:56:33,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:33,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:56:33,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:33,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:56:33,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:56:33,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:33,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 187 transitions, 1570 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) [2024-06-27 19:56:33,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:33,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:33,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:34,604 INFO L124 PetriNetUnfolderBase]: 2331/3613 cut-off events. [2024-06-27 19:56:34,604 INFO L125 PetriNetUnfolderBase]: For 353012/353012 co-relation queries the response was YES. [2024-06-27 19:56:34,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29837 conditions, 3613 events. 2331/3613 cut-off events. For 353012/353012 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 18835 event pairs, 598 based on Foata normal form. 4/3613 useless extension candidates. Maximal degree in co-relation 29760. Up to 3190 conditions per place. [2024-06-27 19:56:34,633 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 158 selfloop transitions, 59 changer transitions 0/222 dead transitions. [2024-06-27 19:56:34,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 222 transitions, 2430 flow [2024-06-27 19:56:34,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:56:34,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:56:34,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-27 19:56:34,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-27 19:56:34,634 INFO L175 Difference]: Start difference. First operand has 166 places, 187 transitions, 1570 flow. Second operand 9 states and 175 transitions. [2024-06-27 19:56:34,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 222 transitions, 2430 flow [2024-06-27 19:56:34,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 222 transitions, 2263 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-27 19:56:34,812 INFO L231 Difference]: Finished difference. Result has 168 places, 191 transitions, 1680 flow [2024-06-27 19:56:34,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1403, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1680, PETRI_PLACES=168, PETRI_TRANSITIONS=191} [2024-06-27 19:56:34,812 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 124 predicate places. [2024-06-27 19:56:34,812 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 191 transitions, 1680 flow [2024-06-27 19:56:34,812 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) [2024-06-27 19:56:34,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:34,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:34,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 19:56:34,813 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)] === [2024-06-27 19:56:34,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:34,813 INFO L85 PathProgramCache]: Analyzing trace with hash 966273303, now seen corresponding path program 10 times [2024-06-27 19:56:34,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:34,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448380729] [2024-06-27 19:56:34,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:34,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:34,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:35,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:35,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:35,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448380729] [2024-06-27 19:56:35,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448380729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:35,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:35,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:56:35,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82435174] [2024-06-27 19:56:35,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:35,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:56:35,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:35,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:56:35,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:56:35,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:35,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 191 transitions, 1680 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) [2024-06-27 19:56:35,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:35,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:35,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:36,606 INFO L124 PetriNetUnfolderBase]: 2323/3601 cut-off events. [2024-06-27 19:56:36,606 INFO L125 PetriNetUnfolderBase]: For 360098/360098 co-relation queries the response was YES. [2024-06-27 19:56:36,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29759 conditions, 3601 events. 2323/3601 cut-off events. For 360098/360098 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 18789 event pairs, 601 based on Foata normal form. 4/3601 useless extension candidates. Maximal degree in co-relation 29681. Up to 3261 conditions per place. [2024-06-27 19:56:36,635 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 160 selfloop transitions, 54 changer transitions 0/219 dead transitions. [2024-06-27 19:56:36,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 219 transitions, 2178 flow [2024-06-27 19:56:36,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:56:36,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:56:36,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 19:56:36,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 19:56:36,636 INFO L175 Difference]: Start difference. First operand has 168 places, 191 transitions, 1680 flow. Second operand 9 states and 171 transitions. [2024-06-27 19:56:36,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 219 transitions, 2178 flow [2024-06-27 19:56:36,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 219 transitions, 1990 flow, removed 65 selfloop flow, removed 5 redundant places. [2024-06-27 19:56:36,842 INFO L231 Difference]: Finished difference. Result has 172 places, 191 transitions, 1607 flow [2024-06-27 19:56:36,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1492, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1607, PETRI_PLACES=172, PETRI_TRANSITIONS=191} [2024-06-27 19:56:36,843 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 128 predicate places. [2024-06-27 19:56:36,843 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 191 transitions, 1607 flow [2024-06-27 19:56:36,843 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) [2024-06-27 19:56:36,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:36,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:36,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 19:56:36,843 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:56:36,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:36,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1660257626, now seen corresponding path program 2 times [2024-06-27 19:56:36,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:36,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455751881] [2024-06-27 19:56:36,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:36,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:36,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:37,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:37,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:37,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455751881] [2024-06-27 19:56:37,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455751881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:37,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:37,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:56:37,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151789290] [2024-06-27 19:56:37,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:37,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:56:37,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:37,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:56:37,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:56:37,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:56:37,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 191 transitions, 1607 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:37,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:37,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:56:37,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:38,302 INFO L124 PetriNetUnfolderBase]: 1976/3214 cut-off events. [2024-06-27 19:56:38,302 INFO L125 PetriNetUnfolderBase]: For 361169/361175 co-relation queries the response was YES. [2024-06-27 19:56:38,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27548 conditions, 3214 events. 1976/3214 cut-off events. For 361169/361175 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 17867 event pairs, 573 based on Foata normal form. 7/3197 useless extension candidates. Maximal degree in co-relation 27468. Up to 2816 conditions per place. [2024-06-27 19:56:38,331 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 145 selfloop transitions, 28 changer transitions 0/210 dead transitions. [2024-06-27 19:56:38,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 210 transitions, 2187 flow [2024-06-27 19:56:38,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:56:38,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:56:38,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-27 19:56:38,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45514950166112955 [2024-06-27 19:56:38,332 INFO L175 Difference]: Start difference. First operand has 172 places, 191 transitions, 1607 flow. Second operand 7 states and 137 transitions. [2024-06-27 19:56:38,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 210 transitions, 2187 flow [2024-06-27 19:56:38,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 210 transitions, 2060 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 19:56:38,554 INFO L231 Difference]: Finished difference. Result has 172 places, 199 transitions, 1659 flow [2024-06-27 19:56:38,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1480, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1659, PETRI_PLACES=172, PETRI_TRANSITIONS=199} [2024-06-27 19:56:38,555 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 128 predicate places. [2024-06-27 19:56:38,555 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 199 transitions, 1659 flow [2024-06-27 19:56:38,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:38,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:38,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:38,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 19:56:38,555 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:56:38,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:38,555 INFO L85 PathProgramCache]: Analyzing trace with hash -435577184, now seen corresponding path program 3 times [2024-06-27 19:56:38,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:38,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719010503] [2024-06-27 19:56:38,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:38,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:38,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:39,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:39,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:39,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719010503] [2024-06-27 19:56:39,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719010503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:39,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:39,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:56:39,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270132585] [2024-06-27 19:56:39,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:39,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:56:39,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:39,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:56:39,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:56:39,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:56:39,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 199 transitions, 1659 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:39,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:39,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:56:39,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:40,013 INFO L124 PetriNetUnfolderBase]: 1973/3210 cut-off events. [2024-06-27 19:56:40,013 INFO L125 PetriNetUnfolderBase]: For 372735/372741 co-relation queries the response was YES. [2024-06-27 19:56:40,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27847 conditions, 3210 events. 1973/3210 cut-off events. For 372735/372741 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 17836 event pairs, 573 based on Foata normal form. 7/3193 useless extension candidates. Maximal degree in co-relation 27765. Up to 2825 conditions per place. [2024-06-27 19:56:40,046 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 152 selfloop transitions, 21 changer transitions 0/210 dead transitions. [2024-06-27 19:56:40,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 210 transitions, 2036 flow [2024-06-27 19:56:40,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:56:40,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:56:40,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-27 19:56:40,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4485049833887043 [2024-06-27 19:56:40,047 INFO L175 Difference]: Start difference. First operand has 172 places, 199 transitions, 1659 flow. Second operand 7 states and 135 transitions. [2024-06-27 19:56:40,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 210 transitions, 2036 flow [2024-06-27 19:56:40,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 210 transitions, 1947 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-27 19:56:40,325 INFO L231 Difference]: Finished difference. Result has 176 places, 200 transitions, 1627 flow [2024-06-27 19:56:40,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1570, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1627, PETRI_PLACES=176, PETRI_TRANSITIONS=200} [2024-06-27 19:56:40,325 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 132 predicate places. [2024-06-27 19:56:40,325 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 200 transitions, 1627 flow [2024-06-27 19:56:40,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:40,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:40,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:40,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 19:56:40,326 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:56:40,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:40,326 INFO L85 PathProgramCache]: Analyzing trace with hash 260180110, now seen corresponding path program 1 times [2024-06-27 19:56:40,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:40,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510239263] [2024-06-27 19:56:40,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:40,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:40,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:41,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:41,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:41,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510239263] [2024-06-27 19:56:41,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510239263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:41,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:41,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:56:41,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195078452] [2024-06-27 19:56:41,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:41,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:56:41,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:41,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:56:41,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:56:41,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:56:41,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 200 transitions, 1627 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-27 19:56:41,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:41,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:56:41,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:41,693 INFO L124 PetriNetUnfolderBase]: 2191/3474 cut-off events. [2024-06-27 19:56:41,693 INFO L125 PetriNetUnfolderBase]: For 387199/387199 co-relation queries the response was YES. [2024-06-27 19:56:41,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29565 conditions, 3474 events. 2191/3474 cut-off events. For 387199/387199 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 18658 event pairs, 539 based on Foata normal form. 1/3474 useless extension candidates. Maximal degree in co-relation 29481. Up to 3196 conditions per place. [2024-06-27 19:56:41,726 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 195 selfloop transitions, 14 changer transitions 0/219 dead transitions. [2024-06-27 19:56:41,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 219 transitions, 2141 flow [2024-06-27 19:56:41,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:56:41,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:56:41,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-27 19:56:41,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 19:56:41,727 INFO L175 Difference]: Start difference. First operand has 176 places, 200 transitions, 1627 flow. Second operand 7 states and 133 transitions. [2024-06-27 19:56:41,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 219 transitions, 2141 flow [2024-06-27 19:56:41,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 219 transitions, 2095 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 19:56:41,982 INFO L231 Difference]: Finished difference. Result has 178 places, 203 transitions, 1677 flow [2024-06-27 19:56:41,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1581, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1677, PETRI_PLACES=178, PETRI_TRANSITIONS=203} [2024-06-27 19:56:41,982 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 134 predicate places. [2024-06-27 19:56:41,982 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 203 transitions, 1677 flow [2024-06-27 19:56:41,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-27 19:56:41,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:41,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:41,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 19:56:41,982 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:56:41,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:41,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1651692698, now seen corresponding path program 1 times [2024-06-27 19:56:41,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:41,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558528683] [2024-06-27 19:56:41,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:41,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:41,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:42,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:42,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:42,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558528683] [2024-06-27 19:56:42,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558528683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:42,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:42,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:56:42,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104594151] [2024-06-27 19:56:42,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:42,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:56:42,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:42,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:56:42,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:56:42,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:56:42,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 203 transitions, 1677 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:42,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:42,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:56:42,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:43,489 INFO L124 PetriNetUnfolderBase]: 2078/3365 cut-off events. [2024-06-27 19:56:43,489 INFO L125 PetriNetUnfolderBase]: For 398592/398592 co-relation queries the response was YES. [2024-06-27 19:56:43,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29171 conditions, 3365 events. 2078/3365 cut-off events. For 398592/398592 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 18529 event pairs, 532 based on Foata normal form. 2/3366 useless extension candidates. Maximal degree in co-relation 29086. Up to 2929 conditions per place. [2024-06-27 19:56:43,522 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 173 selfloop transitions, 14 changer transitions 0/219 dead transitions. [2024-06-27 19:56:43,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 219 transitions, 2127 flow [2024-06-27 19:56:43,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:56:43,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:56:43,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-27 19:56:43,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-27 19:56:43,523 INFO L175 Difference]: Start difference. First operand has 178 places, 203 transitions, 1677 flow. Second operand 7 states and 136 transitions. [2024-06-27 19:56:43,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 219 transitions, 2127 flow [2024-06-27 19:56:43,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 219 transitions, 2053 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-27 19:56:43,778 INFO L231 Difference]: Finished difference. Result has 180 places, 206 transitions, 1687 flow [2024-06-27 19:56:43,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1603, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1687, PETRI_PLACES=180, PETRI_TRANSITIONS=206} [2024-06-27 19:56:43,779 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 136 predicate places. [2024-06-27 19:56:43,779 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 206 transitions, 1687 flow [2024-06-27 19:56:43,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:43,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:43,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:43,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 19:56:43,780 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:56:43,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:43,780 INFO L85 PathProgramCache]: Analyzing trace with hash 260186620, now seen corresponding path program 2 times [2024-06-27 19:56:43,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:43,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520375435] [2024-06-27 19:56:43,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:43,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:43,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:44,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:44,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:44,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520375435] [2024-06-27 19:56:44,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520375435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:44,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:44,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:56:44,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195459811] [2024-06-27 19:56:44,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:44,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:56:44,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:44,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:56:44,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:56:44,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:56:44,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 206 transitions, 1687 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-27 19:56:44,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:44,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:56:44,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:45,145 INFO L124 PetriNetUnfolderBase]: 2206/3495 cut-off events. [2024-06-27 19:56:45,145 INFO L125 PetriNetUnfolderBase]: For 411506/411506 co-relation queries the response was YES. [2024-06-27 19:56:45,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30655 conditions, 3495 events. 2206/3495 cut-off events. For 411506/411506 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 18708 event pairs, 537 based on Foata normal form. 1/3495 useless extension candidates. Maximal degree in co-relation 30569. Up to 3209 conditions per place. [2024-06-27 19:56:45,184 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 193 selfloop transitions, 19 changer transitions 0/222 dead transitions. [2024-06-27 19:56:45,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 222 transitions, 2207 flow [2024-06-27 19:56:45,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:56:45,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:56:45,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-27 19:56:45,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43853820598006643 [2024-06-27 19:56:45,185 INFO L175 Difference]: Start difference. First operand has 180 places, 206 transitions, 1687 flow. Second operand 7 states and 132 transitions. [2024-06-27 19:56:45,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 222 transitions, 2207 flow [2024-06-27 19:56:45,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 222 transitions, 2145 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-27 19:56:45,452 INFO L231 Difference]: Finished difference. Result has 182 places, 209 transitions, 1739 flow [2024-06-27 19:56:45,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1625, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1739, PETRI_PLACES=182, PETRI_TRANSITIONS=209} [2024-06-27 19:56:45,453 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 138 predicate places. [2024-06-27 19:56:45,453 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 209 transitions, 1739 flow [2024-06-27 19:56:45,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-27 19:56:45,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:45,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:45,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 19:56:45,453 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)] === [2024-06-27 19:56:45,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:45,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1430286668, now seen corresponding path program 2 times [2024-06-27 19:56:45,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:45,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853684235] [2024-06-27 19:56:45,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:45,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:45,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:46,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:46,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:46,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853684235] [2024-06-27 19:56:46,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853684235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:46,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:46,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:56:46,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293837348] [2024-06-27 19:56:46,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:46,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:56:46,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:46,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:56:46,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:56:46,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:56:46,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 209 transitions, 1739 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:46,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:46,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:56:46,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:46,980 INFO L124 PetriNetUnfolderBase]: 2093/3389 cut-off events. [2024-06-27 19:56:46,980 INFO L125 PetriNetUnfolderBase]: For 425066/425069 co-relation queries the response was YES. [2024-06-27 19:56:46,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30249 conditions, 3389 events. 2093/3389 cut-off events. For 425066/425069 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 18711 event pairs, 536 based on Foata normal form. 5/3392 useless extension candidates. Maximal degree in co-relation 30162. Up to 2913 conditions per place. [2024-06-27 19:56:47,010 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 167 selfloop transitions, 28 changer transitions 0/228 dead transitions. [2024-06-27 19:56:47,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 228 transitions, 2389 flow [2024-06-27 19:56:47,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:56:47,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:56:47,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-27 19:56:47,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46179401993355484 [2024-06-27 19:56:47,011 INFO L175 Difference]: Start difference. First operand has 182 places, 209 transitions, 1739 flow. Second operand 7 states and 139 transitions. [2024-06-27 19:56:47,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 228 transitions, 2389 flow [2024-06-27 19:56:47,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 228 transitions, 2297 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-27 19:56:47,288 INFO L231 Difference]: Finished difference. Result has 184 places, 215 transitions, 1820 flow [2024-06-27 19:56:47,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1647, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1820, PETRI_PLACES=184, PETRI_TRANSITIONS=215} [2024-06-27 19:56:47,288 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 140 predicate places. [2024-06-27 19:56:47,288 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 215 transitions, 1820 flow [2024-06-27 19:56:47,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:47,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:47,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:47,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 19:56:47,289 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)] === [2024-06-27 19:56:47,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:47,289 INFO L85 PathProgramCache]: Analyzing trace with hash 266673370, now seen corresponding path program 3 times [2024-06-27 19:56:47,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:47,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000494202] [2024-06-27 19:56:47,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:47,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:47,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:47,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:47,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:47,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000494202] [2024-06-27 19:56:47,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000494202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:47,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:47,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:56:47,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476137461] [2024-06-27 19:56:47,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:47,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:56:47,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:47,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:56:47,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:56:48,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:56:48,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 215 transitions, 1820 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-27 19:56:48,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:48,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:56:48,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:48,669 INFO L124 PetriNetUnfolderBase]: 2213/3509 cut-off events. [2024-06-27 19:56:48,669 INFO L125 PetriNetUnfolderBase]: For 436557/436560 co-relation queries the response was YES. [2024-06-27 19:56:48,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31619 conditions, 3509 events. 2213/3509 cut-off events. For 436557/436560 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 18794 event pairs, 548 based on Foata normal form. 3/3509 useless extension candidates. Maximal degree in co-relation 31531. Up to 3210 conditions per place. [2024-06-27 19:56:48,707 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 192 selfloop transitions, 26 changer transitions 0/228 dead transitions. [2024-06-27 19:56:48,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 228 transitions, 2352 flow [2024-06-27 19:56:48,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:56:48,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:56:48,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-27 19:56:48,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-27 19:56:48,708 INFO L175 Difference]: Start difference. First operand has 184 places, 215 transitions, 1820 flow. Second operand 7 states and 131 transitions. [2024-06-27 19:56:48,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 228 transitions, 2352 flow [2024-06-27 19:56:49,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 228 transitions, 2286 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-27 19:56:49,046 INFO L231 Difference]: Finished difference. Result has 188 places, 218 transitions, 1890 flow [2024-06-27 19:56:49,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1754, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1890, PETRI_PLACES=188, PETRI_TRANSITIONS=218} [2024-06-27 19:56:49,046 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 144 predicate places. [2024-06-27 19:56:49,047 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 218 transitions, 1890 flow [2024-06-27 19:56:49,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-27 19:56:49,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:49,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:49,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 19:56:49,047 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)] === [2024-06-27 19:56:49,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:49,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1430278298, now seen corresponding path program 3 times [2024-06-27 19:56:49,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:49,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821506420] [2024-06-27 19:56:49,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:49,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:49,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:50,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:50,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:50,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821506420] [2024-06-27 19:56:50,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821506420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:50,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:50,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:56:50,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341382499] [2024-06-27 19:56:50,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:50,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:56:50,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:50,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:56:50,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:56:50,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:56:50,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 218 transitions, 1890 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:50,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:50,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:56:50,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:50,702 INFO L124 PetriNetUnfolderBase]: 2084/3377 cut-off events. [2024-06-27 19:56:50,702 INFO L125 PetriNetUnfolderBase]: For 443107/443110 co-relation queries the response was YES. [2024-06-27 19:56:50,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30781 conditions, 3377 events. 2084/3377 cut-off events. For 443107/443110 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 18713 event pairs, 538 based on Foata normal form. 4/3379 useless extension candidates. Maximal degree in co-relation 30691. Up to 2932 conditions per place. [2024-06-27 19:56:50,735 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 178 selfloop transitions, 19 changer transitions 0/231 dead transitions. [2024-06-27 19:56:50,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 231 transitions, 2358 flow [2024-06-27 19:56:50,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:56:50,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:56:50,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-27 19:56:50,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4485049833887043 [2024-06-27 19:56:50,736 INFO L175 Difference]: Start difference. First operand has 188 places, 218 transitions, 1890 flow. Second operand 7 states and 135 transitions. [2024-06-27 19:56:50,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 231 transitions, 2358 flow [2024-06-27 19:56:51,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 231 transitions, 2244 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-27 19:56:51,022 INFO L231 Difference]: Finished difference. Result has 190 places, 221 transitions, 1876 flow [2024-06-27 19:56:51,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1776, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1876, PETRI_PLACES=190, PETRI_TRANSITIONS=221} [2024-06-27 19:56:51,022 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 146 predicate places. [2024-06-27 19:56:51,022 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 221 transitions, 1876 flow [2024-06-27 19:56:51,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:56:51,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:51,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:51,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 19:56:51,023 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:56:51,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:51,023 INFO L85 PathProgramCache]: Analyzing trace with hash 94647120, now seen corresponding path program 1 times [2024-06-27 19:56:51,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:51,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775145090] [2024-06-27 19:56:51,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:51,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:51,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:51,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:51,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:51,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775145090] [2024-06-27 19:56:51,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775145090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:51,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:51,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:56:51,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245503071] [2024-06-27 19:56:51,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:51,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:56:51,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:51,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:56:51,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:56:52,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:52,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 221 transitions, 1876 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) [2024-06-27 19:56:52,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:52,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:52,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:52,955 INFO L124 PetriNetUnfolderBase]: 2522/3945 cut-off events. [2024-06-27 19:56:52,955 INFO L125 PetriNetUnfolderBase]: For 532938/532938 co-relation queries the response was YES. [2024-06-27 19:56:52,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36224 conditions, 3945 events. 2522/3945 cut-off events. For 532938/532938 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 21331 event pairs, 483 based on Foata normal form. 16/3960 useless extension candidates. Maximal degree in co-relation 36133. Up to 3296 conditions per place. [2024-06-27 19:56:52,993 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 244 selfloop transitions, 29 changer transitions 0/278 dead transitions. [2024-06-27 19:56:52,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 278 transitions, 2932 flow [2024-06-27 19:56:52,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:56:52,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:56:52,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 218 transitions. [2024-06-27 19:56:52,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4608879492600423 [2024-06-27 19:56:52,994 INFO L175 Difference]: Start difference. First operand has 190 places, 221 transitions, 1876 flow. Second operand 11 states and 218 transitions. [2024-06-27 19:56:52,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 278 transitions, 2932 flow [2024-06-27 19:56:53,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 278 transitions, 2858 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 19:56:53,315 INFO L231 Difference]: Finished difference. Result has 196 places, 223 transitions, 1976 flow [2024-06-27 19:56:53,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1802, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1976, PETRI_PLACES=196, PETRI_TRANSITIONS=223} [2024-06-27 19:56:53,315 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 152 predicate places. [2024-06-27 19:56:53,315 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 223 transitions, 1976 flow [2024-06-27 19:56:53,316 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) [2024-06-27 19:56:53,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:53,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:53,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 19:56:53,316 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:56:53,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:53,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1454781616, now seen corresponding path program 2 times [2024-06-27 19:56:53,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:53,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233383025] [2024-06-27 19:56:53,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:53,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:53,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:54,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:54,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:54,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233383025] [2024-06-27 19:56:54,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233383025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:54,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:54,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:56:54,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81044619] [2024-06-27 19:56:54,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:54,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:56:54,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:54,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:56:54,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:56:54,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:54,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 223 transitions, 1976 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) [2024-06-27 19:56:54,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:54,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:54,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:55,282 INFO L124 PetriNetUnfolderBase]: 2580/4054 cut-off events. [2024-06-27 19:56:55,282 INFO L125 PetriNetUnfolderBase]: For 549135/549135 co-relation queries the response was YES. [2024-06-27 19:56:55,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37276 conditions, 4054 events. 2580/4054 cut-off events. For 549135/549135 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 22194 event pairs, 646 based on Foata normal form. 16/4069 useless extension candidates. Maximal degree in co-relation 37184. Up to 3480 conditions per place. [2024-06-27 19:56:55,322 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 244 selfloop transitions, 25 changer transitions 0/274 dead transitions. [2024-06-27 19:56:55,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 274 transitions, 2964 flow [2024-06-27 19:56:55,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:56:55,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:56:55,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-27 19:56:55,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 19:56:55,324 INFO L175 Difference]: Start difference. First operand has 196 places, 223 transitions, 1976 flow. Second operand 10 states and 200 transitions. [2024-06-27 19:56:55,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 274 transitions, 2964 flow [2024-06-27 19:56:55,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 274 transitions, 2880 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-27 19:56:55,746 INFO L231 Difference]: Finished difference. Result has 199 places, 224 transitions, 2004 flow [2024-06-27 19:56:55,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1898, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2004, PETRI_PLACES=199, PETRI_TRANSITIONS=224} [2024-06-27 19:56:55,747 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 155 predicate places. [2024-06-27 19:56:55,747 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 224 transitions, 2004 flow [2024-06-27 19:56:55,747 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) [2024-06-27 19:56:55,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:55,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:55,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 19:56:55,747 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:56:55,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:55,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1450197646, now seen corresponding path program 3 times [2024-06-27 19:56:55,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:55,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939538481] [2024-06-27 19:56:55,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:55,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:55,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:56,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:56,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:56,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939538481] [2024-06-27 19:56:56,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939538481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:56,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:56,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:56:56,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373626989] [2024-06-27 19:56:56,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:56,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:56:56,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:56,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:56:56,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:56:56,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:56,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 224 transitions, 2004 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) [2024-06-27 19:56:56,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:56,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:56,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:57,780 INFO L124 PetriNetUnfolderBase]: 2638/4152 cut-off events. [2024-06-27 19:56:57,780 INFO L125 PetriNetUnfolderBase]: For 568960/568960 co-relation queries the response was YES. [2024-06-27 19:56:57,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37823 conditions, 4152 events. 2638/4152 cut-off events. For 568960/568960 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 22891 event pairs, 657 based on Foata normal form. 16/4167 useless extension candidates. Maximal degree in co-relation 37729. Up to 3629 conditions per place. [2024-06-27 19:56:57,821 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 246 selfloop transitions, 23 changer transitions 0/274 dead transitions. [2024-06-27 19:56:57,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 274 transitions, 2990 flow [2024-06-27 19:56:57,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:56:57,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:56:57,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-27 19:56:57,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4604651162790698 [2024-06-27 19:56:57,822 INFO L175 Difference]: Start difference. First operand has 199 places, 224 transitions, 2004 flow. Second operand 10 states and 198 transitions. [2024-06-27 19:56:57,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 274 transitions, 2990 flow [2024-06-27 19:56:58,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 274 transitions, 2898 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-27 19:56:58,130 INFO L231 Difference]: Finished difference. Result has 201 places, 225 transitions, 2016 flow [2024-06-27 19:56:58,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1914, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2016, PETRI_PLACES=201, PETRI_TRANSITIONS=225} [2024-06-27 19:56:58,130 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 157 predicate places. [2024-06-27 19:56:58,130 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 225 transitions, 2016 flow [2024-06-27 19:56:58,130 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) [2024-06-27 19:56:58,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:58,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:58,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 19:56:58,131 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:56:58,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:58,131 INFO L85 PathProgramCache]: Analyzing trace with hash -2000254388, now seen corresponding path program 4 times [2024-06-27 19:56:58,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:58,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153756701] [2024-06-27 19:56:58,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:58,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:58,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:59,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:59,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:59,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153756701] [2024-06-27 19:56:59,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153756701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:59,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:59,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:56:59,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039885580] [2024-06-27 19:56:59,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:59,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:56:59,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:59,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:56:59,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:56:59,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:56:59,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 225 transitions, 2016 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) [2024-06-27 19:56:59,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:59,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:56:59,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:00,201 INFO L124 PetriNetUnfolderBase]: 2602/4096 cut-off events. [2024-06-27 19:57:00,201 INFO L125 PetriNetUnfolderBase]: For 551704/551704 co-relation queries the response was YES. [2024-06-27 19:57:00,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36135 conditions, 4096 events. 2602/4096 cut-off events. For 551704/551704 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 22501 event pairs, 659 based on Foata normal form. 20/4115 useless extension candidates. Maximal degree in co-relation 36040. Up to 3729 conditions per place. [2024-06-27 19:57:00,243 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 242 selfloop transitions, 21 changer transitions 0/268 dead transitions. [2024-06-27 19:57:00,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 268 transitions, 2682 flow [2024-06-27 19:57:00,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:57:00,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:57:00,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-27 19:57:00,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-27 19:57:00,245 INFO L175 Difference]: Start difference. First operand has 201 places, 225 transitions, 2016 flow. Second operand 10 states and 192 transitions. [2024-06-27 19:57:00,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 268 transitions, 2682 flow [2024-06-27 19:57:00,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 268 transitions, 2571 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-27 19:57:00,589 INFO L231 Difference]: Finished difference. Result has 203 places, 225 transitions, 1954 flow [2024-06-27 19:57:00,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1905, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1954, PETRI_PLACES=203, PETRI_TRANSITIONS=225} [2024-06-27 19:57:00,589 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 159 predicate places. [2024-06-27 19:57:00,589 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 225 transitions, 1954 flow [2024-06-27 19:57:00,589 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) [2024-06-27 19:57:00,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:00,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:00,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 19:57:00,589 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:00,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:00,590 INFO L85 PathProgramCache]: Analyzing trace with hash 2143101844, now seen corresponding path program 5 times [2024-06-27 19:57:00,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:00,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687688493] [2024-06-27 19:57:00,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:00,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:00,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:01,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:01,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:01,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687688493] [2024-06-27 19:57:01,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687688493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:01,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:01,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:57:01,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773682008] [2024-06-27 19:57:01,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:01,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:57:01,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:01,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:57:01,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:57:01,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:57:01,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 225 transitions, 1954 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) [2024-06-27 19:57:01,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:01,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:57:01,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:02,711 INFO L124 PetriNetUnfolderBase]: 2677/4216 cut-off events. [2024-06-27 19:57:02,712 INFO L125 PetriNetUnfolderBase]: For 564958/564961 co-relation queries the response was YES. [2024-06-27 19:57:02,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36759 conditions, 4216 events. 2677/4216 cut-off events. For 564958/564961 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 23429 event pairs, 627 based on Foata normal form. 20/4233 useless extension candidates. Maximal degree in co-relation 36663. Up to 3451 conditions per place. [2024-06-27 19:57:02,755 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 175 selfloop transitions, 88 changer transitions 0/268 dead transitions. [2024-06-27 19:57:02,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 268 transitions, 2676 flow [2024-06-27 19:57:02,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:57:02,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:57:02,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-27 19:57:02,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697674418604651 [2024-06-27 19:57:02,756 INFO L175 Difference]: Start difference. First operand has 203 places, 225 transitions, 1954 flow. Second operand 10 states and 202 transitions. [2024-06-27 19:57:02,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 268 transitions, 2676 flow [2024-06-27 19:57:03,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 268 transitions, 2629 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-27 19:57:03,097 INFO L231 Difference]: Finished difference. Result has 204 places, 226 transitions, 2148 flow [2024-06-27 19:57:03,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1907, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2148, PETRI_PLACES=204, PETRI_TRANSITIONS=226} [2024-06-27 19:57:03,098 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 160 predicate places. [2024-06-27 19:57:03,098 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 226 transitions, 2148 flow [2024-06-27 19:57:03,098 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) [2024-06-27 19:57:03,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:03,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:03,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 19:57:03,098 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:03,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:03,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1347076016, now seen corresponding path program 6 times [2024-06-27 19:57:03,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:03,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754757219] [2024-06-27 19:57:03,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:03,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:03,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:04,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:04,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:04,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754757219] [2024-06-27 19:57:04,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754757219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:04,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:04,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:57:04,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795694850] [2024-06-27 19:57:04,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:04,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:57:04,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:04,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:57:04,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:57:04,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:57:04,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 226 transitions, 2148 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) [2024-06-27 19:57:04,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:04,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:57:04,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:05,273 INFO L124 PetriNetUnfolderBase]: 2752/4356 cut-off events. [2024-06-27 19:57:05,273 INFO L125 PetriNetUnfolderBase]: For 590201/590204 co-relation queries the response was YES. [2024-06-27 19:57:05,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38339 conditions, 4356 events. 2752/4356 cut-off events. For 590201/590204 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 24592 event pairs, 656 based on Foata normal form. 20/4373 useless extension candidates. Maximal degree in co-relation 38242. Up to 3576 conditions per place. [2024-06-27 19:57:05,318 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 179 selfloop transitions, 86 changer transitions 0/270 dead transitions. [2024-06-27 19:57:05,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 270 transitions, 2880 flow [2024-06-27 19:57:05,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:57:05,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:57:05,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-27 19:57:05,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744186046511628 [2024-06-27 19:57:05,319 INFO L175 Difference]: Start difference. First operand has 204 places, 226 transitions, 2148 flow. Second operand 10 states and 204 transitions. [2024-06-27 19:57:05,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 270 transitions, 2880 flow [2024-06-27 19:57:05,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 270 transitions, 2671 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-27 19:57:05,788 INFO L231 Difference]: Finished difference. Result has 206 places, 227 transitions, 2178 flow [2024-06-27 19:57:05,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1939, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2178, PETRI_PLACES=206, PETRI_TRANSITIONS=227} [2024-06-27 19:57:05,789 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 162 predicate places. [2024-06-27 19:57:05,789 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 227 transitions, 2178 flow [2024-06-27 19:57:05,789 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) [2024-06-27 19:57:05,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:05,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:05,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 19:57:05,790 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)] === [2024-06-27 19:57:05,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:05,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1932821938, now seen corresponding path program 7 times [2024-06-27 19:57:05,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:05,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836362326] [2024-06-27 19:57:05,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:05,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:05,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:06,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:06,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:06,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836362326] [2024-06-27 19:57:06,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836362326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:06,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:06,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:57:06,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979951404] [2024-06-27 19:57:06,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:06,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:57:06,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:06,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:57:06,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:57:06,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:57:06,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 227 transitions, 2178 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) [2024-06-27 19:57:06,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:06,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:57:06,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:07,953 INFO L124 PetriNetUnfolderBase]: 2810/4454 cut-off events. [2024-06-27 19:57:07,953 INFO L125 PetriNetUnfolderBase]: For 599182/599185 co-relation queries the response was YES. [2024-06-27 19:57:07,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38989 conditions, 4454 events. 2810/4454 cut-off events. For 599182/599185 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 25324 event pairs, 647 based on Foata normal form. 16/4467 useless extension candidates. Maximal degree in co-relation 38891. Up to 3444 conditions per place. [2024-06-27 19:57:07,990 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 180 selfloop transitions, 89 changer transitions 0/274 dead transitions. [2024-06-27 19:57:07,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 274 transitions, 2934 flow [2024-06-27 19:57:07,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:57:07,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:57:07,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-06-27 19:57:07,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4790697674418605 [2024-06-27 19:57:07,991 INFO L175 Difference]: Start difference. First operand has 206 places, 227 transitions, 2178 flow. Second operand 10 states and 206 transitions. [2024-06-27 19:57:07,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 274 transitions, 2934 flow [2024-06-27 19:57:08,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 274 transitions, 2727 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-27 19:57:08,436 INFO L231 Difference]: Finished difference. Result has 208 places, 228 transitions, 2217 flow [2024-06-27 19:57:08,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1971, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2217, PETRI_PLACES=208, PETRI_TRANSITIONS=228} [2024-06-27 19:57:08,436 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 164 predicate places. [2024-06-27 19:57:08,437 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 228 transitions, 2217 flow [2024-06-27 19:57:08,437 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) [2024-06-27 19:57:08,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:08,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:08,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 19:57:08,437 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)] === [2024-06-27 19:57:08,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:08,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1766588158, now seen corresponding path program 8 times [2024-06-27 19:57:08,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:08,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137201584] [2024-06-27 19:57:08,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:08,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:08,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:09,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:09,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:09,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137201584] [2024-06-27 19:57:09,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137201584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:09,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:09,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:57:09,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622284736] [2024-06-27 19:57:09,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:09,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:57:09,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:09,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:57:09,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:57:09,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:57:09,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 228 transitions, 2217 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) [2024-06-27 19:57:09,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:09,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:57:09,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:10,683 INFO L124 PetriNetUnfolderBase]: 2979/4753 cut-off events. [2024-06-27 19:57:10,683 INFO L125 PetriNetUnfolderBase]: For 667313/667316 co-relation queries the response was YES. [2024-06-27 19:57:10,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42482 conditions, 4753 events. 2979/4753 cut-off events. For 667313/667316 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 27671 event pairs, 704 based on Foata normal form. 16/4766 useless extension candidates. Maximal degree in co-relation 42383. Up to 3797 conditions per place. [2024-06-27 19:57:10,733 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 187 selfloop transitions, 87 changer transitions 0/279 dead transitions. [2024-06-27 19:57:10,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 279 transitions, 3309 flow [2024-06-27 19:57:10,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:57:10,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:57:10,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-27 19:57:10,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4906976744186046 [2024-06-27 19:57:10,734 INFO L175 Difference]: Start difference. First operand has 208 places, 228 transitions, 2217 flow. Second operand 10 states and 211 transitions. [2024-06-27 19:57:10,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 279 transitions, 3309 flow [2024-06-27 19:57:11,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 279 transitions, 3083 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-27 19:57:11,244 INFO L231 Difference]: Finished difference. Result has 210 places, 230 transitions, 2297 flow [2024-06-27 19:57:11,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1991, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2297, PETRI_PLACES=210, PETRI_TRANSITIONS=230} [2024-06-27 19:57:11,245 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 166 predicate places. [2024-06-27 19:57:11,245 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 230 transitions, 2297 flow [2024-06-27 19:57:11,245 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) [2024-06-27 19:57:11,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:11,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:11,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 19:57:11,245 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)] === [2024-06-27 19:57:11,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:11,246 INFO L85 PathProgramCache]: Analyzing trace with hash -2000849034, now seen corresponding path program 9 times [2024-06-27 19:57:11,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:11,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190517502] [2024-06-27 19:57:11,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:11,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:11,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:12,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:12,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:12,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190517502] [2024-06-27 19:57:12,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190517502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:12,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:12,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:57:12,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807501685] [2024-06-27 19:57:12,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:12,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:57:12,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:12,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:57:12,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:57:12,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:57:12,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 230 transitions, 2297 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) [2024-06-27 19:57:12,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:12,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:57:12,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:13,585 INFO L124 PetriNetUnfolderBase]: 2943/4697 cut-off events. [2024-06-27 19:57:13,585 INFO L125 PetriNetUnfolderBase]: For 645513/645516 co-relation queries the response was YES. [2024-06-27 19:57:13,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40596 conditions, 4697 events. 2943/4697 cut-off events. For 645513/645516 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 27296 event pairs, 706 based on Foata normal form. 20/4714 useless extension candidates. Maximal degree in co-relation 40496. Up to 3897 conditions per place. [2024-06-27 19:57:13,638 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 183 selfloop transitions, 85 changer transitions 0/273 dead transitions. [2024-06-27 19:57:13,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 273 transitions, 2977 flow [2024-06-27 19:57:13,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:57:13,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:57:13,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2024-06-27 19:57:13,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-27 19:57:13,639 INFO L175 Difference]: Start difference. First operand has 210 places, 230 transitions, 2297 flow. Second operand 10 states and 205 transitions. [2024-06-27 19:57:13,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 273 transitions, 2977 flow [2024-06-27 19:57:14,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 273 transitions, 2790 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-27 19:57:14,238 INFO L231 Difference]: Finished difference. Result has 214 places, 230 transitions, 2287 flow [2024-06-27 19:57:14,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2110, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2287, PETRI_PLACES=214, PETRI_TRANSITIONS=230} [2024-06-27 19:57:14,238 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 170 predicate places. [2024-06-27 19:57:14,239 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 230 transitions, 2287 flow [2024-06-27 19:57:14,239 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) [2024-06-27 19:57:14,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:14,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:14,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 19:57:14,239 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)] === [2024-06-27 19:57:14,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:14,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1824860592, now seen corresponding path program 10 times [2024-06-27 19:57:14,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:14,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399527612] [2024-06-27 19:57:14,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:14,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:14,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:15,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:15,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:15,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399527612] [2024-06-27 19:57:15,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399527612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:15,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:15,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:57:15,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550230669] [2024-06-27 19:57:15,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:15,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:57:15,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:15,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:57:15,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:57:15,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:57:15,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 230 transitions, 2287 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) [2024-06-27 19:57:15,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:15,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:57:15,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:16,277 INFO L124 PetriNetUnfolderBase]: 3001/4795 cut-off events. [2024-06-27 19:57:16,278 INFO L125 PetriNetUnfolderBase]: For 646035/646038 co-relation queries the response was YES. [2024-06-27 19:57:16,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41133 conditions, 4795 events. 3001/4795 cut-off events. For 646035/646038 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 28033 event pairs, 687 based on Foata normal form. 16/4808 useless extension candidates. Maximal degree in co-relation 41031. Up to 3402 conditions per place. [2024-06-27 19:57:16,325 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 179 selfloop transitions, 94 changer transitions 0/278 dead transitions. [2024-06-27 19:57:16,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 278 transitions, 3057 flow [2024-06-27 19:57:16,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:57:16,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:57:16,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 208 transitions. [2024-06-27 19:57:16,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48372093023255813 [2024-06-27 19:57:16,326 INFO L175 Difference]: Start difference. First operand has 214 places, 230 transitions, 2287 flow. Second operand 10 states and 208 transitions. [2024-06-27 19:57:16,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 278 transitions, 3057 flow [2024-06-27 19:57:16,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 278 transitions, 2882 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-27 19:57:16,909 INFO L231 Difference]: Finished difference. Result has 215 places, 231 transitions, 2372 flow [2024-06-27 19:57:16,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2112, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2372, PETRI_PLACES=215, PETRI_TRANSITIONS=231} [2024-06-27 19:57:16,910 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 171 predicate places. [2024-06-27 19:57:16,910 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 231 transitions, 2372 flow [2024-06-27 19:57:16,910 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) [2024-06-27 19:57:16,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:16,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:16,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 19:57:16,910 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:16,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:16,910 INFO L85 PathProgramCache]: Analyzing trace with hash -133482131, now seen corresponding path program 1 times [2024-06-27 19:57:16,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:16,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488160415] [2024-06-27 19:57:16,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:16,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:16,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:17,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:17,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:17,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488160415] [2024-06-27 19:57:17,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488160415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:17,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:17,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:57:17,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197628845] [2024-06-27 19:57:17,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:17,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:57:17,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:17,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:57:17,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:57:17,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:57:17,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 231 transitions, 2372 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-27 19:57:17,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:17,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:57:17,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:18,438 INFO L124 PetriNetUnfolderBase]: 2823/4598 cut-off events. [2024-06-27 19:57:18,438 INFO L125 PetriNetUnfolderBase]: For 626782/626785 co-relation queries the response was YES. [2024-06-27 19:57:18,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40181 conditions, 4598 events. 2823/4598 cut-off events. For 626782/626785 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 27663 event pairs, 764 based on Foata normal form. 3/4563 useless extension candidates. Maximal degree in co-relation 40078. Up to 4185 conditions per place. [2024-06-27 19:57:18,484 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 205 selfloop transitions, 19 changer transitions 0/253 dead transitions. [2024-06-27 19:57:18,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 253 transitions, 2918 flow [2024-06-27 19:57:18,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:57:18,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:57:18,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-27 19:57:18,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584717607973422 [2024-06-27 19:57:18,485 INFO L175 Difference]: Start difference. First operand has 215 places, 231 transitions, 2372 flow. Second operand 7 states and 138 transitions. [2024-06-27 19:57:18,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 253 transitions, 2918 flow [2024-06-27 19:57:18,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 253 transitions, 2678 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-27 19:57:18,985 INFO L231 Difference]: Finished difference. Result has 214 places, 234 transitions, 2232 flow [2024-06-27 19:57:18,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2132, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2232, PETRI_PLACES=214, PETRI_TRANSITIONS=234} [2024-06-27 19:57:18,985 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 170 predicate places. [2024-06-27 19:57:18,986 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 234 transitions, 2232 flow [2024-06-27 19:57:18,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-27 19:57:18,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:18,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:18,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 19:57:18,986 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:18,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:18,986 INFO L85 PathProgramCache]: Analyzing trace with hash -125863571, now seen corresponding path program 2 times [2024-06-27 19:57:18,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:18,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144225573] [2024-06-27 19:57:18,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:18,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:18,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:19,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:19,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:19,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144225573] [2024-06-27 19:57:19,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144225573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:19,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:19,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:57:19,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448157839] [2024-06-27 19:57:19,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:19,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:57:19,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:19,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:57:19,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:57:19,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:57:19,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 234 transitions, 2232 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-27 19:57:19,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:19,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:57:19,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:20,556 INFO L124 PetriNetUnfolderBase]: 2836/4613 cut-off events. [2024-06-27 19:57:20,556 INFO L125 PetriNetUnfolderBase]: For 635703/635706 co-relation queries the response was YES. [2024-06-27 19:57:20,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40060 conditions, 4613 events. 2836/4613 cut-off events. For 635703/635706 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 27743 event pairs, 745 based on Foata normal form. 3/4578 useless extension candidates. Maximal degree in co-relation 39956. Up to 4193 conditions per place. [2024-06-27 19:57:20,600 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 204 selfloop transitions, 26 changer transitions 0/259 dead transitions. [2024-06-27 19:57:20,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 259 transitions, 3009 flow [2024-06-27 19:57:20,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:57:20,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:57:20,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-27 19:57:20,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45514950166112955 [2024-06-27 19:57:20,601 INFO L175 Difference]: Start difference. First operand has 214 places, 234 transitions, 2232 flow. Second operand 7 states and 137 transitions. [2024-06-27 19:57:20,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 259 transitions, 3009 flow [2024-06-27 19:57:21,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 259 transitions, 2931 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 19:57:21,075 INFO L231 Difference]: Finished difference. Result has 217 places, 242 transitions, 2358 flow [2024-06-27 19:57:21,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2154, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2358, PETRI_PLACES=217, PETRI_TRANSITIONS=242} [2024-06-27 19:57:21,076 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 173 predicate places. [2024-06-27 19:57:21,076 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 242 transitions, 2358 flow [2024-06-27 19:57:21,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-27 19:57:21,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:21,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:21,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 19:57:21,076 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)] === [2024-06-27 19:57:21,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:21,076 INFO L85 PathProgramCache]: Analyzing trace with hash 2143348108, now seen corresponding path program 1 times [2024-06-27 19:57:21,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:21,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371942792] [2024-06-27 19:57:21,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:21,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:21,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:22,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:22,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:22,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371942792] [2024-06-27 19:57:22,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371942792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:22,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:22,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:57:22,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392824043] [2024-06-27 19:57:22,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:22,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:57:22,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:22,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:57:22,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:57:22,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:57:22,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 242 transitions, 2358 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) [2024-06-27 19:57:22,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:22,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:57:22,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:23,492 INFO L124 PetriNetUnfolderBase]: 3036/4854 cut-off events. [2024-06-27 19:57:23,492 INFO L125 PetriNetUnfolderBase]: For 668438/668441 co-relation queries the response was YES. [2024-06-27 19:57:23,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42208 conditions, 4854 events. 3036/4854 cut-off events. For 668438/668441 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 28478 event pairs, 741 based on Foata normal form. 4/4855 useless extension candidates. Maximal degree in co-relation 42102. Up to 4445 conditions per place. [2024-06-27 19:57:23,542 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 233 selfloop transitions, 45 changer transitions 0/283 dead transitions. [2024-06-27 19:57:23,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 283 transitions, 3102 flow [2024-06-27 19:57:23,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:57:23,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:57:23,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-27 19:57:23,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44883720930232557 [2024-06-27 19:57:23,543 INFO L175 Difference]: Start difference. First operand has 217 places, 242 transitions, 2358 flow. Second operand 10 states and 193 transitions. [2024-06-27 19:57:23,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 283 transitions, 3102 flow [2024-06-27 19:57:24,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 283 transitions, 3020 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-27 19:57:24,184 INFO L231 Difference]: Finished difference. Result has 225 places, 247 transitions, 2479 flow [2024-06-27 19:57:24,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2276, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2479, PETRI_PLACES=225, PETRI_TRANSITIONS=247} [2024-06-27 19:57:24,184 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 181 predicate places. [2024-06-27 19:57:24,184 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 247 transitions, 2479 flow [2024-06-27 19:57:24,184 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) [2024-06-27 19:57:24,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:24,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:24,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 19:57:24,184 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)] === [2024-06-27 19:57:24,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:24,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1554095275, now seen corresponding path program 1 times [2024-06-27 19:57:24,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:24,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032664396] [2024-06-27 19:57:24,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:24,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:24,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:25,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:25,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:25,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032664396] [2024-06-27 19:57:25,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032664396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:25,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:25,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:57:25,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716101335] [2024-06-27 19:57:25,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:25,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:57:25,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:25,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:57:25,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:57:25,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:57:25,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 247 transitions, 2479 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-27 19:57:25,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:25,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:57:25,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:25,989 INFO L124 PetriNetUnfolderBase]: 2692/4471 cut-off events. [2024-06-27 19:57:25,990 INFO L125 PetriNetUnfolderBase]: For 688465/688477 co-relation queries the response was YES. [2024-06-27 19:57:26,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40639 conditions, 4471 events. 2692/4471 cut-off events. For 688465/688477 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 27595 event pairs, 711 based on Foata normal form. 9/4422 useless extension candidates. Maximal degree in co-relation 40530. Up to 3918 conditions per place. [2024-06-27 19:57:26,041 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 202 selfloop transitions, 21 changer transitions 0/268 dead transitions. [2024-06-27 19:57:26,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 268 transitions, 3023 flow [2024-06-27 19:57:26,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:57:26,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:57:26,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 19:57:26,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-27 19:57:26,042 INFO L175 Difference]: Start difference. First operand has 225 places, 247 transitions, 2479 flow. Second operand 8 states and 156 transitions. [2024-06-27 19:57:26,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 268 transitions, 3023 flow [2024-06-27 19:57:26,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 268 transitions, 2862 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-27 19:57:26,571 INFO L231 Difference]: Finished difference. Result has 226 places, 250 transitions, 2422 flow [2024-06-27 19:57:26,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2318, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2422, PETRI_PLACES=226, PETRI_TRANSITIONS=250} [2024-06-27 19:57:26,571 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 182 predicate places. [2024-06-27 19:57:26,572 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 250 transitions, 2422 flow [2024-06-27 19:57:26,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-27 19:57:26,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:26,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:26,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 19:57:26,572 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:26,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:26,573 INFO L85 PathProgramCache]: Analyzing trace with hash -73536326, now seen corresponding path program 11 times [2024-06-27 19:57:26,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:26,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808245440] [2024-06-27 19:57:26,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:26,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:26,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:27,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:27,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:27,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808245440] [2024-06-27 19:57:27,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808245440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:27,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:27,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:57:27,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979814376] [2024-06-27 19:57:27,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:27,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:57:27,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:27,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:57:27,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:57:27,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:57:27,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 250 transitions, 2422 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) [2024-06-27 19:57:27,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:27,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:57:27,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:28,913 INFO L124 PetriNetUnfolderBase]: 3131/5003 cut-off events. [2024-06-27 19:57:28,913 INFO L125 PetriNetUnfolderBase]: For 749895/749895 co-relation queries the response was YES. [2024-06-27 19:57:28,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44602 conditions, 5003 events. 3131/5003 cut-off events. For 749895/749895 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 29512 event pairs, 707 based on Foata normal form. 20/5019 useless extension candidates. Maximal degree in co-relation 44492. Up to 4200 conditions per place. [2024-06-27 19:57:28,967 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 199 selfloop transitions, 87 changer transitions 0/291 dead transitions. [2024-06-27 19:57:28,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 291 transitions, 3210 flow [2024-06-27 19:57:28,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:57:28,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:57:28,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-27 19:57:28,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 19:57:28,968 INFO L175 Difference]: Start difference. First operand has 226 places, 250 transitions, 2422 flow. Second operand 10 states and 200 transitions. [2024-06-27 19:57:28,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 291 transitions, 3210 flow [2024-06-27 19:57:29,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 291 transitions, 3128 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 19:57:29,541 INFO L231 Difference]: Finished difference. Result has 230 places, 251 transitions, 2591 flow [2024-06-27 19:57:29,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2340, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2591, PETRI_PLACES=230, PETRI_TRANSITIONS=251} [2024-06-27 19:57:29,541 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 186 predicate places. [2024-06-27 19:57:29,541 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 251 transitions, 2591 flow [2024-06-27 19:57:29,541 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) [2024-06-27 19:57:29,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:29,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:29,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 19:57:29,541 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:29,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:29,542 INFO L85 PathProgramCache]: Analyzing trace with hash 100957606, now seen corresponding path program 12 times [2024-06-27 19:57:29,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:29,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896624571] [2024-06-27 19:57:29,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:29,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:29,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:30,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:30,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:30,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896624571] [2024-06-27 19:57:30,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896624571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:30,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:30,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:57:30,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734464777] [2024-06-27 19:57:30,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:30,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:57:30,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:30,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:57:30,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:57:30,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:57:30,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 251 transitions, 2591 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) [2024-06-27 19:57:30,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:30,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:57:30,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:31,869 INFO L124 PetriNetUnfolderBase]: 3206/5133 cut-off events. [2024-06-27 19:57:31,869 INFO L125 PetriNetUnfolderBase]: For 781454/781454 co-relation queries the response was YES. [2024-06-27 19:57:31,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46240 conditions, 5133 events. 3206/5133 cut-off events. For 781454/781454 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 30511 event pairs, 722 based on Foata normal form. 20/5149 useless extension candidates. Maximal degree in co-relation 46129. Up to 4325 conditions per place. [2024-06-27 19:57:31,927 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 202 selfloop transitions, 86 changer transitions 0/293 dead transitions. [2024-06-27 19:57:31,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 293 transitions, 3391 flow [2024-06-27 19:57:31,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:57:31,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:57:31,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-27 19:57:31,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697674418604651 [2024-06-27 19:57:31,928 INFO L175 Difference]: Start difference. First operand has 230 places, 251 transitions, 2591 flow. Second operand 10 states and 202 transitions. [2024-06-27 19:57:31,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 293 transitions, 3391 flow [2024-06-27 19:57:32,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 293 transitions, 3172 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-27 19:57:32,618 INFO L231 Difference]: Finished difference. Result has 232 places, 252 transitions, 2623 flow [2024-06-27 19:57:32,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2372, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2623, PETRI_PLACES=232, PETRI_TRANSITIONS=252} [2024-06-27 19:57:32,619 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 188 predicate places. [2024-06-27 19:57:32,619 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 252 transitions, 2623 flow [2024-06-27 19:57:32,619 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) [2024-06-27 19:57:32,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:32,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:32,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 19:57:32,619 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)] === [2024-06-27 19:57:32,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:32,619 INFO L85 PathProgramCache]: Analyzing trace with hash -742282054, now seen corresponding path program 13 times [2024-06-27 19:57:32,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:32,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540642497] [2024-06-27 19:57:32,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:32,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:32,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:33,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:33,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:33,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540642497] [2024-06-27 19:57:33,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540642497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:33,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:33,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:57:33,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089930953] [2024-06-27 19:57:33,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:33,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:57:33,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:33,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:57:33,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:57:33,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:57:33,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 252 transitions, 2623 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) [2024-06-27 19:57:33,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:33,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:57:33,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:35,017 INFO L124 PetriNetUnfolderBase]: 3281/5268 cut-off events. [2024-06-27 19:57:35,017 INFO L125 PetriNetUnfolderBase]: For 803835/803835 co-relation queries the response was YES. [2024-06-27 19:57:35,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47210 conditions, 5268 events. 3281/5268 cut-off events. For 803835/803835 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 31686 event pairs, 746 based on Foata normal form. 20/5284 useless extension candidates. Maximal degree in co-relation 47098. Up to 4450 conditions per place. [2024-06-27 19:57:35,078 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 191 selfloop transitions, 96 changer transitions 0/292 dead transitions. [2024-06-27 19:57:35,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 292 transitions, 3411 flow [2024-06-27 19:57:35,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:57:35,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:57:35,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-27 19:57:35,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-27 19:57:35,079 INFO L175 Difference]: Start difference. First operand has 232 places, 252 transitions, 2623 flow. Second operand 10 states and 196 transitions. [2024-06-27 19:57:35,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 292 transitions, 3411 flow [2024-06-27 19:57:35,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 292 transitions, 3192 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-27 19:57:35,937 INFO L231 Difference]: Finished difference. Result has 234 places, 253 transitions, 2677 flow [2024-06-27 19:57:35,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2404, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2677, PETRI_PLACES=234, PETRI_TRANSITIONS=253} [2024-06-27 19:57:35,937 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 190 predicate places. [2024-06-27 19:57:35,937 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 253 transitions, 2677 flow [2024-06-27 19:57:35,937 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) [2024-06-27 19:57:35,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:35,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:35,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 19:57:35,938 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)] === [2024-06-27 19:57:35,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:35,938 INFO L85 PathProgramCache]: Analyzing trace with hash -2134292406, now seen corresponding path program 14 times [2024-06-27 19:57:35,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:35,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627008464] [2024-06-27 19:57:35,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:35,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:35,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:36,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:36,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:36,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627008464] [2024-06-27 19:57:36,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627008464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:36,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:36,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:57:36,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027143714] [2024-06-27 19:57:36,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:36,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:57:36,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:36,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:57:36,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:57:36,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:57:36,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 253 transitions, 2677 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) [2024-06-27 19:57:36,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:36,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:57:36,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:38,373 INFO L124 PetriNetUnfolderBase]: 3339/5371 cut-off events. [2024-06-27 19:57:38,373 INFO L125 PetriNetUnfolderBase]: For 812614/812614 co-relation queries the response was YES. [2024-06-27 19:57:38,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47908 conditions, 5371 events. 3339/5371 cut-off events. For 812614/812614 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 32395 event pairs, 741 based on Foata normal form. 16/5383 useless extension candidates. Maximal degree in co-relation 47795. Up to 4318 conditions per place. [2024-06-27 19:57:38,430 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 204 selfloop transitions, 89 changer transitions 0/298 dead transitions. [2024-06-27 19:57:38,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 298 transitions, 3505 flow [2024-06-27 19:57:38,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:57:38,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:57:38,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-27 19:57:38,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744186046511628 [2024-06-27 19:57:38,431 INFO L175 Difference]: Start difference. First operand has 234 places, 253 transitions, 2677 flow. Second operand 10 states and 204 transitions. [2024-06-27 19:57:38,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 298 transitions, 3505 flow [2024-06-27 19:57:38,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 298 transitions, 3264 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-27 19:57:38,944 INFO L231 Difference]: Finished difference. Result has 236 places, 254 transitions, 2696 flow [2024-06-27 19:57:38,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2436, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2696, PETRI_PLACES=236, PETRI_TRANSITIONS=254} [2024-06-27 19:57:38,944 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 192 predicate places. [2024-06-27 19:57:38,945 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 254 transitions, 2696 flow [2024-06-27 19:57:38,945 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) [2024-06-27 19:57:38,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:38,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:38,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 19:57:38,945 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)] === [2024-06-27 19:57:38,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:38,945 INFO L85 PathProgramCache]: Analyzing trace with hash -65453804, now seen corresponding path program 15 times [2024-06-27 19:57:38,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:38,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780507456] [2024-06-27 19:57:38,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:38,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:38,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:39,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:39,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:39,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780507456] [2024-06-27 19:57:39,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780507456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:39,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:39,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:57:39,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511395093] [2024-06-27 19:57:39,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:39,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:57:39,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:39,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:57:39,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:57:39,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:57:39,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 254 transitions, 2696 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) [2024-06-27 19:57:39,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:39,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:57:39,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:41,321 INFO L124 PetriNetUnfolderBase]: 3508/5665 cut-off events. [2024-06-27 19:57:41,321 INFO L125 PetriNetUnfolderBase]: For 900867/900867 co-relation queries the response was YES. [2024-06-27 19:57:41,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51757 conditions, 5665 events. 3508/5665 cut-off events. For 900867/900867 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 34879 event pairs, 784 based on Foata normal form. 16/5677 useless extension candidates. Maximal degree in co-relation 51643. Up to 4671 conditions per place. [2024-06-27 19:57:41,383 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 206 selfloop transitions, 91 changer transitions 0/302 dead transitions. [2024-06-27 19:57:41,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 302 transitions, 3906 flow [2024-06-27 19:57:41,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:57:41,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:57:41,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2024-06-27 19:57:41,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-27 19:57:41,385 INFO L175 Difference]: Start difference. First operand has 236 places, 254 transitions, 2696 flow. Second operand 10 states and 205 transitions. [2024-06-27 19:57:41,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 302 transitions, 3906 flow [2024-06-27 19:57:42,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 302 transitions, 3666 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-27 19:57:42,412 INFO L231 Difference]: Finished difference. Result has 238 places, 256 transitions, 2798 flow [2024-06-27 19:57:42,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2456, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2798, PETRI_PLACES=238, PETRI_TRANSITIONS=256} [2024-06-27 19:57:42,412 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 194 predicate places. [2024-06-27 19:57:42,413 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 256 transitions, 2798 flow [2024-06-27 19:57:42,413 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) [2024-06-27 19:57:42,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:42,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:42,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 19:57:42,413 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)] === [2024-06-27 19:57:42,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:42,413 INFO L85 PathProgramCache]: Analyzing trace with hash -246026216, now seen corresponding path program 16 times [2024-06-27 19:57:42,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:42,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917153049] [2024-06-27 19:57:42,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:42,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:42,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:43,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:43,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:43,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917153049] [2024-06-27 19:57:43,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917153049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:43,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:43,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:57:43,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017779957] [2024-06-27 19:57:43,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:43,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:57:43,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:43,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:57:43,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:57:43,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:57:43,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 256 transitions, 2798 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) [2024-06-27 19:57:43,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:43,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:57:43,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:44,824 INFO L124 PetriNetUnfolderBase]: 3472/5609 cut-off events. [2024-06-27 19:57:44,824 INFO L125 PetriNetUnfolderBase]: For 867866/867866 co-relation queries the response was YES. [2024-06-27 19:57:44,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49522 conditions, 5609 events. 3472/5609 cut-off events. For 867866/867866 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 34468 event pairs, 786 based on Foata normal form. 20/5625 useless extension candidates. Maximal degree in co-relation 49407. Up to 4771 conditions per place. [2024-06-27 19:57:44,888 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 202 selfloop transitions, 89 changer transitions 0/296 dead transitions. [2024-06-27 19:57:44,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 296 transitions, 3528 flow [2024-06-27 19:57:44,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:57:44,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:57:44,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-27 19:57:44,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4627906976744186 [2024-06-27 19:57:44,889 INFO L175 Difference]: Start difference. First operand has 238 places, 256 transitions, 2798 flow. Second operand 10 states and 199 transitions. [2024-06-27 19:57:44,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 296 transitions, 3528 flow [2024-06-27 19:57:45,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 296 transitions, 3308 flow, removed 59 selfloop flow, removed 6 redundant places. [2024-06-27 19:57:45,661 INFO L231 Difference]: Finished difference. Result has 242 places, 256 transitions, 2763 flow [2024-06-27 19:57:45,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2578, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2763, PETRI_PLACES=242, PETRI_TRANSITIONS=256} [2024-06-27 19:57:45,661 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 198 predicate places. [2024-06-27 19:57:45,662 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 256 transitions, 2763 flow [2024-06-27 19:57:45,662 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) [2024-06-27 19:57:45,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:45,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:45,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 19:57:45,662 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)] === [2024-06-27 19:57:45,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:45,662 INFO L85 PathProgramCache]: Analyzing trace with hash -70037774, now seen corresponding path program 17 times [2024-06-27 19:57:45,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:45,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081458434] [2024-06-27 19:57:45,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:45,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:45,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:46,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:46,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:46,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081458434] [2024-06-27 19:57:46,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081458434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:46,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:46,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:57:46,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407344172] [2024-06-27 19:57:46,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:46,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:57:46,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:46,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:57:46,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:57:46,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:57:46,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 256 transitions, 2763 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) [2024-06-27 19:57:46,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:46,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:57:46,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:47,944 INFO L124 PetriNetUnfolderBase]: 3591/5810 cut-off events. [2024-06-27 19:57:47,944 INFO L125 PetriNetUnfolderBase]: For 907436/907436 co-relation queries the response was YES. [2024-06-27 19:57:47,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51920 conditions, 5810 events. 3591/5810 cut-off events. For 907436/907436 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 36042 event pairs, 791 based on Foata normal form. 16/5822 useless extension candidates. Maximal degree in co-relation 51803. Up to 4050 conditions per place. [2024-06-27 19:57:48,014 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 198 selfloop transitions, 101 changer transitions 0/304 dead transitions. [2024-06-27 19:57:48,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 304 transitions, 3985 flow [2024-06-27 19:57:48,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:57:48,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:57:48,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-27 19:57:48,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744186046511628 [2024-06-27 19:57:48,015 INFO L175 Difference]: Start difference. First operand has 242 places, 256 transitions, 2763 flow. Second operand 10 states and 204 transitions. [2024-06-27 19:57:48,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 304 transitions, 3985 flow [2024-06-27 19:57:48,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 304 transitions, 3800 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-27 19:57:48,981 INFO L231 Difference]: Finished difference. Result has 243 places, 258 transitions, 2944 flow [2024-06-27 19:57:48,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2578, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2944, PETRI_PLACES=243, PETRI_TRANSITIONS=258} [2024-06-27 19:57:48,982 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 199 predicate places. [2024-06-27 19:57:48,982 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 258 transitions, 2944 flow [2024-06-27 19:57:48,982 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) [2024-06-27 19:57:48,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:48,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:48,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 19:57:48,982 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)] === [2024-06-27 19:57:48,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:48,983 INFO L85 PathProgramCache]: Analyzing trace with hash 70457680, now seen corresponding path program 18 times [2024-06-27 19:57:48,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:48,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735451480] [2024-06-27 19:57:48,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:48,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:48,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:49,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:49,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:49,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735451480] [2024-06-27 19:57:49,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735451480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:49,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:49,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:57:49,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897405755] [2024-06-27 19:57:49,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:49,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:57:49,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:49,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:57:49,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:57:50,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:57:50,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 258 transitions, 2944 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) [2024-06-27 19:57:50,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:50,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:57:50,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:51,585 INFO L124 PetriNetUnfolderBase]: 3666/5935 cut-off events. [2024-06-27 19:57:51,585 INFO L125 PetriNetUnfolderBase]: For 956294/956294 co-relation queries the response was YES. [2024-06-27 19:57:51,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53549 conditions, 5935 events. 3666/5935 cut-off events. For 956294/956294 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 37082 event pairs, 831 based on Foata normal form. 20/5951 useless extension candidates. Maximal degree in co-relation 53431. Up to 5097 conditions per place. [2024-06-27 19:57:51,646 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 204 selfloop transitions, 90 changer transitions 0/299 dead transitions. [2024-06-27 19:57:51,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 299 transitions, 3760 flow [2024-06-27 19:57:51,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:57:51,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:57:51,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-27 19:57:51,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4604651162790698 [2024-06-27 19:57:51,647 INFO L175 Difference]: Start difference. First operand has 243 places, 258 transitions, 2944 flow. Second operand 10 states and 198 transitions. [2024-06-27 19:57:51,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 299 transitions, 3760 flow [2024-06-27 19:57:52,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 299 transitions, 3563 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-27 19:57:52,406 INFO L231 Difference]: Finished difference. Result has 247 places, 259 transitions, 3016 flow [2024-06-27 19:57:52,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2759, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3016, PETRI_PLACES=247, PETRI_TRANSITIONS=259} [2024-06-27 19:57:52,407 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 203 predicate places. [2024-06-27 19:57:52,407 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 259 transitions, 3016 flow [2024-06-27 19:57:52,407 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) [2024-06-27 19:57:52,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:52,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:52,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 19:57:52,408 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)] === [2024-06-27 19:57:52,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:52,408 INFO L85 PathProgramCache]: Analyzing trace with hash -103863272, now seen corresponding path program 19 times [2024-06-27 19:57:52,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:52,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841980569] [2024-06-27 19:57:52,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:52,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:52,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:53,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:53,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:53,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841980569] [2024-06-27 19:57:53,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841980569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:53,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:53,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:57:53,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566330446] [2024-06-27 19:57:53,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:53,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:57:53,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:53,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:57:53,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:57:53,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:57:53,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 259 transitions, 3016 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) [2024-06-27 19:57:53,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:53,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:57:53,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:55,001 INFO L124 PetriNetUnfolderBase]: 3716/6031 cut-off events. [2024-06-27 19:57:55,001 INFO L125 PetriNetUnfolderBase]: For 954522/954522 co-relation queries the response was YES. [2024-06-27 19:57:55,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53692 conditions, 6031 events. 3716/6031 cut-off events. For 954522/954522 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 37897 event pairs, 858 based on Foata normal form. 20/6047 useless extension candidates. Maximal degree in co-relation 53572. Up to 5183 conditions per place. [2024-06-27 19:57:55,070 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 206 selfloop transitions, 89 changer transitions 0/300 dead transitions. [2024-06-27 19:57:55,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 300 transitions, 3824 flow [2024-06-27 19:57:55,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:57:55,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:57:55,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-27 19:57:55,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4627906976744186 [2024-06-27 19:57:55,071 INFO L175 Difference]: Start difference. First operand has 247 places, 259 transitions, 3016 flow. Second operand 10 states and 199 transitions. [2024-06-27 19:57:55,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 300 transitions, 3824 flow [2024-06-27 19:57:55,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 300 transitions, 3601 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-27 19:57:55,825 INFO L231 Difference]: Finished difference. Result has 249 places, 260 transitions, 3050 flow [2024-06-27 19:57:55,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2793, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3050, PETRI_PLACES=249, PETRI_TRANSITIONS=260} [2024-06-27 19:57:55,825 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 205 predicate places. [2024-06-27 19:57:55,825 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 260 transitions, 3050 flow [2024-06-27 19:57:55,826 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) [2024-06-27 19:57:55,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:55,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:55,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 19:57:55,826 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)] === [2024-06-27 19:57:55,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:55,826 INFO L85 PathProgramCache]: Analyzing trace with hash -110297012, now seen corresponding path program 20 times [2024-06-27 19:57:55,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:55,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198877887] [2024-06-27 19:57:55,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:55,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:55,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:56,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:56,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:56,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198877887] [2024-06-27 19:57:56,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198877887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:56,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:56,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:57:56,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960549452] [2024-06-27 19:57:56,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:56,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:57:56,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:56,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:57:56,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:57:56,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:57:56,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 260 transitions, 3050 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) [2024-06-27 19:57:56,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:56,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:57:56,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:58,364 INFO L124 PetriNetUnfolderBase]: 3688/5987 cut-off events. [2024-06-27 19:57:58,365 INFO L125 PetriNetUnfolderBase]: For 905164/905164 co-relation queries the response was YES. [2024-06-27 19:57:58,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51873 conditions, 5987 events. 3688/5987 cut-off events. For 905164/905164 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 37571 event pairs, 813 based on Foata normal form. 16/5999 useless extension candidates. Maximal degree in co-relation 51752. Up to 4789 conditions per place. [2024-06-27 19:57:58,432 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 204 selfloop transitions, 94 changer transitions 0/303 dead transitions. [2024-06-27 19:57:58,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 303 transitions, 3808 flow [2024-06-27 19:57:58,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:57:58,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:57:58,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-27 19:57:58,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 19:57:58,433 INFO L175 Difference]: Start difference. First operand has 249 places, 260 transitions, 3050 flow. Second operand 10 states and 200 transitions. [2024-06-27 19:57:58,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 303 transitions, 3808 flow [2024-06-27 19:57:59,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 303 transitions, 3557 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-27 19:57:59,157 INFO L231 Difference]: Finished difference. Result has 251 places, 260 transitions, 2993 flow [2024-06-27 19:57:59,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2799, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2993, PETRI_PLACES=251, PETRI_TRANSITIONS=260} [2024-06-27 19:57:59,157 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 207 predicate places. [2024-06-27 19:57:59,157 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 260 transitions, 2993 flow [2024-06-27 19:57:59,157 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) [2024-06-27 19:57:59,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:59,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:59,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 19:57:59,158 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)] === [2024-06-27 19:57:59,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:59,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1187405271, now seen corresponding path program 3 times [2024-06-27 19:57:59,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:59,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197443] [2024-06-27 19:57:59,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:59,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:59,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:59,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:59,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:59,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197443] [2024-06-27 19:57:59,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:59,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:59,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:57:59,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124287094] [2024-06-27 19:57:59,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:59,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:57:59,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:59,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:57:59,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:57:59,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:57:59,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 260 transitions, 2993 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-27 19:57:59,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:59,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:57:59,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:00,915 INFO L124 PetriNetUnfolderBase]: 3465/5716 cut-off events. [2024-06-27 19:58:00,915 INFO L125 PetriNetUnfolderBase]: For 854552/854557 co-relation queries the response was YES. [2024-06-27 19:58:00,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49851 conditions, 5716 events. 3465/5716 cut-off events. For 854552/854557 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 36806 event pairs, 894 based on Foata normal form. 5/5647 useless extension candidates. Maximal degree in co-relation 49729. Up to 5266 conditions per place. [2024-06-27 19:58:00,983 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 229 selfloop transitions, 19 changer transitions 0/277 dead transitions. [2024-06-27 19:58:00,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 277 transitions, 3536 flow [2024-06-27 19:58:00,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:58:00,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:58:00,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-27 19:58:00,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4485049833887043 [2024-06-27 19:58:00,984 INFO L175 Difference]: Start difference. First operand has 251 places, 260 transitions, 2993 flow. Second operand 7 states and 135 transitions. [2024-06-27 19:58:00,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 277 transitions, 3536 flow [2024-06-27 19:58:01,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 277 transitions, 3188 flow, removed 30 selfloop flow, removed 10 redundant places. [2024-06-27 19:58:01,875 INFO L231 Difference]: Finished difference. Result has 248 places, 261 transitions, 2698 flow [2024-06-27 19:58:01,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2645, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2698, PETRI_PLACES=248, PETRI_TRANSITIONS=261} [2024-06-27 19:58:01,876 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 204 predicate places. [2024-06-27 19:58:01,876 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 261 transitions, 2698 flow [2024-06-27 19:58:01,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-27 19:58:01,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:01,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:58:01,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 19:58:01,877 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)] === [2024-06-27 19:58:01,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:01,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1187850741, now seen corresponding path program 4 times [2024-06-27 19:58:01,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:01,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721531278] [2024-06-27 19:58:01,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:01,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:01,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:02,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:02,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:02,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721531278] [2024-06-27 19:58:02,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721531278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:02,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:02,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:58:02,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158898594] [2024-06-27 19:58:02,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:02,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:58:02,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:02,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:58:02,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:58:02,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:58:02,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 261 transitions, 2698 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-27 19:58:02,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:02,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:58:02,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:03,614 INFO L124 PetriNetUnfolderBase]: 3470/5718 cut-off events. [2024-06-27 19:58:03,614 INFO L125 PetriNetUnfolderBase]: For 866687/866692 co-relation queries the response was YES. [2024-06-27 19:58:03,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48965 conditions, 5718 events. 3470/5718 cut-off events. For 866687/866692 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 36745 event pairs, 879 based on Foata normal form. 5/5649 useless extension candidates. Maximal degree in co-relation 48843. Up to 5264 conditions per place. [2024-06-27 19:58:03,678 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 221 selfloop transitions, 27 changer transitions 0/277 dead transitions. [2024-06-27 19:58:03,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 277 transitions, 3290 flow [2024-06-27 19:58:03,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:58:03,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:58:03,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-27 19:58:03,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 19:58:03,679 INFO L175 Difference]: Start difference. First operand has 248 places, 261 transitions, 2698 flow. Second operand 7 states and 133 transitions. [2024-06-27 19:58:03,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 277 transitions, 3290 flow [2024-06-27 19:58:04,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 277 transitions, 3248 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 19:58:04,439 INFO L231 Difference]: Finished difference. Result has 250 places, 264 transitions, 2786 flow [2024-06-27 19:58:04,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2656, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2786, PETRI_PLACES=250, PETRI_TRANSITIONS=264} [2024-06-27 19:58:04,439 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 206 predicate places. [2024-06-27 19:58:04,439 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 264 transitions, 2786 flow [2024-06-27 19:58:04,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-27 19:58:04,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:04,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:58:04,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 19:58:04,440 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:04,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:04,440 INFO L85 PathProgramCache]: Analyzing trace with hash 107459980, now seen corresponding path program 2 times [2024-06-27 19:58:04,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:04,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192861669] [2024-06-27 19:58:04,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:04,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:04,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:05,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:05,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:05,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192861669] [2024-06-27 19:58:05,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192861669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:05,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:05,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:58:05,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865631708] [2024-06-27 19:58:05,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:05,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:58:05,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:05,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:58:05,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:58:05,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:58:05,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 264 transitions, 2786 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) [2024-06-27 19:58:05,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:05,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:58:05,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:07,218 INFO L124 PetriNetUnfolderBase]: 3707/6033 cut-off events. [2024-06-27 19:58:07,219 INFO L125 PetriNetUnfolderBase]: For 900909/900914 co-relation queries the response was YES. [2024-06-27 19:58:07,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51320 conditions, 6033 events. 3707/6033 cut-off events. For 900909/900914 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 38108 event pairs, 909 based on Foata normal form. 8/6039 useless extension candidates. Maximal degree in co-relation 51197. Up to 5567 conditions per place. [2024-06-27 19:58:07,288 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 250 selfloop transitions, 47 changer transitions 0/302 dead transitions. [2024-06-27 19:58:07,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 302 transitions, 3581 flow [2024-06-27 19:58:07,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:58:07,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:58:07,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-27 19:58:07,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 19:58:07,289 INFO L175 Difference]: Start difference. First operand has 250 places, 264 transitions, 2786 flow. Second operand 10 states and 190 transitions. [2024-06-27 19:58:07,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 302 transitions, 3581 flow [2024-06-27 19:58:08,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 302 transitions, 3473 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-27 19:58:08,021 INFO L231 Difference]: Finished difference. Result has 256 places, 269 transitions, 2904 flow [2024-06-27 19:58:08,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2678, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2904, PETRI_PLACES=256, PETRI_TRANSITIONS=269} [2024-06-27 19:58:08,022 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 212 predicate places. [2024-06-27 19:58:08,022 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 269 transitions, 2904 flow [2024-06-27 19:58:08,022 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) [2024-06-27 19:58:08,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:08,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:58:08,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 19:58:08,022 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:08,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:08,022 INFO L85 PathProgramCache]: Analyzing trace with hash -276185878, now seen corresponding path program 3 times [2024-06-27 19:58:08,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:08,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297319157] [2024-06-27 19:58:08,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:08,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:08,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:09,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:09,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:09,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297319157] [2024-06-27 19:58:09,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297319157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:09,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:09,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:58:09,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543468559] [2024-06-27 19:58:09,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:09,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:58:09,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:09,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:58:09,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:58:09,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:58:09,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 269 transitions, 2904 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) [2024-06-27 19:58:09,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:09,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:58:09,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:10,700 INFO L124 PetriNetUnfolderBase]: 3735/6101 cut-off events. [2024-06-27 19:58:10,700 INFO L125 PetriNetUnfolderBase]: For 925493/925498 co-relation queries the response was YES. [2024-06-27 19:58:10,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52559 conditions, 6101 events. 3735/6101 cut-off events. For 925493/925498 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 38839 event pairs, 929 based on Foata normal form. 8/6107 useless extension candidates. Maximal degree in co-relation 52434. Up to 5606 conditions per place. [2024-06-27 19:58:10,771 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 247 selfloop transitions, 59 changer transitions 0/311 dead transitions. [2024-06-27 19:58:10,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 311 transitions, 3769 flow [2024-06-27 19:58:10,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:58:10,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:58:10,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-27 19:58:10,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43488372093023253 [2024-06-27 19:58:10,772 INFO L175 Difference]: Start difference. First operand has 256 places, 269 transitions, 2904 flow. Second operand 10 states and 187 transitions. [2024-06-27 19:58:10,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 311 transitions, 3769 flow [2024-06-27 19:58:11,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 311 transitions, 3572 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-27 19:58:11,726 INFO L231 Difference]: Finished difference. Result has 260 places, 279 transitions, 3028 flow [2024-06-27 19:58:11,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2721, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3028, PETRI_PLACES=260, PETRI_TRANSITIONS=279} [2024-06-27 19:58:11,727 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 216 predicate places. [2024-06-27 19:58:11,727 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 279 transitions, 3028 flow [2024-06-27 19:58:11,727 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) [2024-06-27 19:58:11,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:11,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:58:11,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 19:58:11,727 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:11,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:11,727 INFO L85 PathProgramCache]: Analyzing trace with hash 77133034, now seen corresponding path program 4 times [2024-06-27 19:58:11,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:11,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105925567] [2024-06-27 19:58:11,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:11,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:11,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:12,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:12,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:12,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105925567] [2024-06-27 19:58:12,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105925567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:12,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:12,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:58:12,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469879896] [2024-06-27 19:58:12,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:12,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:58:12,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:12,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:58:12,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:58:12,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:58:12,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 279 transitions, 3028 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) [2024-06-27 19:58:12,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:12,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:58:12,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:14,401 INFO L124 PetriNetUnfolderBase]: 3752/6100 cut-off events. [2024-06-27 19:58:14,401 INFO L125 PetriNetUnfolderBase]: For 947780/947785 co-relation queries the response was YES. [2024-06-27 19:58:14,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53442 conditions, 6100 events. 3752/6100 cut-off events. For 947780/947785 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 38454 event pairs, 914 based on Foata normal form. 8/6106 useless extension candidates. Maximal degree in co-relation 53315. Up to 5633 conditions per place. [2024-06-27 19:58:14,471 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 254 selfloop transitions, 55 changer transitions 0/314 dead transitions. [2024-06-27 19:58:14,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 314 transitions, 3839 flow [2024-06-27 19:58:14,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:58:14,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:58:14,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-27 19:58:14,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43953488372093025 [2024-06-27 19:58:14,472 INFO L175 Difference]: Start difference. First operand has 260 places, 279 transitions, 3028 flow. Second operand 10 states and 189 transitions. [2024-06-27 19:58:14,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 314 transitions, 3839 flow [2024-06-27 19:58:15,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 314 transitions, 3664 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-27 19:58:15,207 INFO L231 Difference]: Finished difference. Result has 266 places, 282 transitions, 3093 flow [2024-06-27 19:58:15,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2853, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3093, PETRI_PLACES=266, PETRI_TRANSITIONS=282} [2024-06-27 19:58:15,208 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 222 predicate places. [2024-06-27 19:58:15,208 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 282 transitions, 3093 flow [2024-06-27 19:58:15,208 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) [2024-06-27 19:58:15,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:15,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:58:15,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 19:58:15,208 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:15,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:15,209 INFO L85 PathProgramCache]: Analyzing trace with hash -446460400, now seen corresponding path program 5 times [2024-06-27 19:58:15,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:15,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387509777] [2024-06-27 19:58:15,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:15,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:15,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:16,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:16,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:16,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387509777] [2024-06-27 19:58:16,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387509777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:16,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:16,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:58:16,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316499881] [2024-06-27 19:58:16,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:16,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:58:16,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:16,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:58:16,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:58:16,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:58:16,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 282 transitions, 3093 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) [2024-06-27 19:58:16,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:16,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:58:16,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:17,903 INFO L124 PetriNetUnfolderBase]: 3769/6127 cut-off events. [2024-06-27 19:58:17,903 INFO L125 PetriNetUnfolderBase]: For 966706/966711 co-relation queries the response was YES. [2024-06-27 19:58:17,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52955 conditions, 6127 events. 3769/6127 cut-off events. For 966706/966711 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 38752 event pairs, 842 based on Foata normal form. 8/6133 useless extension candidates. Maximal degree in co-relation 52826. Up to 5541 conditions per place. [2024-06-27 19:58:17,966 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 245 selfloop transitions, 71 changer transitions 0/321 dead transitions. [2024-06-27 19:58:17,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 321 transitions, 4355 flow [2024-06-27 19:58:17,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:58:17,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:58:17,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-27 19:58:17,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 19:58:17,967 INFO L175 Difference]: Start difference. First operand has 266 places, 282 transitions, 3093 flow. Second operand 10 states and 190 transitions. [2024-06-27 19:58:17,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 321 transitions, 4355 flow [2024-06-27 19:58:18,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 321 transitions, 4146 flow, removed 52 selfloop flow, removed 7 redundant places. [2024-06-27 19:58:18,717 INFO L231 Difference]: Finished difference. Result has 269 places, 286 transitions, 3249 flow [2024-06-27 19:58:18,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2884, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3249, PETRI_PLACES=269, PETRI_TRANSITIONS=286} [2024-06-27 19:58:18,717 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 225 predicate places. [2024-06-27 19:58:18,717 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 286 transitions, 3249 flow [2024-06-27 19:58:18,717 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) [2024-06-27 19:58:18,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:18,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:58:18,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 19:58:18,718 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)] === [2024-06-27 19:58:18,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:18,718 INFO L85 PathProgramCache]: Analyzing trace with hash -742035790, now seen corresponding path program 6 times [2024-06-27 19:58:18,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:18,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061945612] [2024-06-27 19:58:18,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:18,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:18,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:19,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:19,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:19,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061945612] [2024-06-27 19:58:19,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061945612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:19,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:19,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:58:19,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553298572] [2024-06-27 19:58:19,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:19,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:58:19,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:19,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:58:19,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:58:19,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:58:19,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 286 transitions, 3249 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) [2024-06-27 19:58:19,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:19,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:58:19,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:21,433 INFO L124 PetriNetUnfolderBase]: 3761/6135 cut-off events. [2024-06-27 19:58:21,433 INFO L125 PetriNetUnfolderBase]: For 970697/970702 co-relation queries the response was YES. [2024-06-27 19:58:21,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52721 conditions, 6135 events. 3761/6135 cut-off events. For 970697/970702 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 38956 event pairs, 922 based on Foata normal form. 8/6141 useless extension candidates. Maximal degree in co-relation 52591. Up to 5648 conditions per place. [2024-06-27 19:58:21,502 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 256 selfloop transitions, 57 changer transitions 0/318 dead transitions. [2024-06-27 19:58:21,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 318 transitions, 3955 flow [2024-06-27 19:58:21,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:58:21,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:58:21,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-27 19:58:21,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4372093023255814 [2024-06-27 19:58:21,504 INFO L175 Difference]: Start difference. First operand has 269 places, 286 transitions, 3249 flow. Second operand 10 states and 188 transitions. [2024-06-27 19:58:21,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 318 transitions, 3955 flow [2024-06-27 19:58:22,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 318 transitions, 3697 flow, removed 93 selfloop flow, removed 6 redundant places. [2024-06-27 19:58:22,953 INFO L231 Difference]: Finished difference. Result has 273 places, 286 transitions, 3112 flow [2024-06-27 19:58:22,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2991, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3112, PETRI_PLACES=273, PETRI_TRANSITIONS=286} [2024-06-27 19:58:22,954 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 229 predicate places. [2024-06-27 19:58:22,954 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 286 transitions, 3112 flow [2024-06-27 19:58:22,954 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) [2024-06-27 19:58:22,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:22,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:58:22,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 19:58:22,954 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:22,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:22,954 INFO L85 PathProgramCache]: Analyzing trace with hash -80647691, now seen corresponding path program 5 times [2024-06-27 19:58:22,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:22,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157855360] [2024-06-27 19:58:22,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:22,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:22,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:23,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:23,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:23,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157855360] [2024-06-27 19:58:23,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157855360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:23,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:23,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:58:23,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604149889] [2024-06-27 19:58:23,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:23,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:58:23,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:23,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:58:23,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:58:23,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:58:23,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 286 transitions, 3112 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-27 19:58:23,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:23,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:58:23,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:24,788 INFO L124 PetriNetUnfolderBase]: 3546/5865 cut-off events. [2024-06-27 19:58:24,788 INFO L125 PetriNetUnfolderBase]: For 968453/968461 co-relation queries the response was YES. [2024-06-27 19:58:24,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51187 conditions, 5865 events. 3546/5865 cut-off events. For 968453/968461 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 38087 event pairs, 882 based on Foata normal form. 7/5795 useless extension candidates. Maximal degree in co-relation 51055. Up to 5361 conditions per place. [2024-06-27 19:58:24,861 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 233 selfloop transitions, 44 changer transitions 0/306 dead transitions. [2024-06-27 19:58:24,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 306 transitions, 4075 flow [2024-06-27 19:58:24,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:58:24,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:58:24,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-27 19:58:24,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 19:58:24,862 INFO L175 Difference]: Start difference. First operand has 273 places, 286 transitions, 3112 flow. Second operand 7 states and 133 transitions. [2024-06-27 19:58:24,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 306 transitions, 4075 flow [2024-06-27 19:58:26,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 306 transitions, 3886 flow, removed 13 selfloop flow, removed 13 redundant places. [2024-06-27 19:58:26,305 INFO L231 Difference]: Finished difference. Result has 268 places, 295 transitions, 3244 flow [2024-06-27 19:58:26,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2923, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3244, PETRI_PLACES=268, PETRI_TRANSITIONS=295} [2024-06-27 19:58:26,306 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 224 predicate places. [2024-06-27 19:58:26,306 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 295 transitions, 3244 flow [2024-06-27 19:58:26,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-27 19:58:26,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:26,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:58:26,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 19:58:26,306 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:26,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:26,306 INFO L85 PathProgramCache]: Analyzing trace with hash -86361611, now seen corresponding path program 6 times [2024-06-27 19:58:26,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:26,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099734038] [2024-06-27 19:58:26,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:26,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:26,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:27,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:27,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:27,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099734038] [2024-06-27 19:58:27,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099734038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:27,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:27,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:58:27,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52339195] [2024-06-27 19:58:27,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:27,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:58:27,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:27,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:58:27,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:58:27,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:58:27,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 295 transitions, 3244 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-27 19:58:27,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:27,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:58:27,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:28,098 INFO L124 PetriNetUnfolderBase]: 3543/5847 cut-off events. [2024-06-27 19:58:28,098 INFO L125 PetriNetUnfolderBase]: For 985745/985753 co-relation queries the response was YES. [2024-06-27 19:58:28,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51282 conditions, 5847 events. 3543/5847 cut-off events. For 985745/985753 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 37793 event pairs, 872 based on Foata normal form. 7/5777 useless extension candidates. Maximal degree in co-relation 51152. Up to 5358 conditions per place. [2024-06-27 19:58:28,167 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 232 selfloop transitions, 44 changer transitions 0/305 dead transitions. [2024-06-27 19:58:28,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 305 transitions, 3820 flow [2024-06-27 19:58:28,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:58:28,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:58:28,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-27 19:58:28,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43853820598006643 [2024-06-27 19:58:28,168 INFO L175 Difference]: Start difference. First operand has 268 places, 295 transitions, 3244 flow. Second operand 7 states and 132 transitions. [2024-06-27 19:58:28,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 305 transitions, 3820 flow [2024-06-27 19:58:29,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 305 transitions, 3652 flow, removed 77 selfloop flow, removed 2 redundant places. [2024-06-27 19:58:29,430 INFO L231 Difference]: Finished difference. Result has 273 places, 295 transitions, 3170 flow [2024-06-27 19:58:29,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3076, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3170, PETRI_PLACES=273, PETRI_TRANSITIONS=295} [2024-06-27 19:58:29,431 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 229 predicate places. [2024-06-27 19:58:29,431 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 295 transitions, 3170 flow [2024-06-27 19:58:29,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 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) [2024-06-27 19:58:29,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:29,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:58:29,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 19:58:29,431 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:29,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:29,431 INFO L85 PathProgramCache]: Analyzing trace with hash -86351691, now seen corresponding path program 2 times [2024-06-27 19:58:29,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:29,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940867116] [2024-06-27 19:58:29,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:29,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:29,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:30,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:30,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:30,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940867116] [2024-06-27 19:58:30,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940867116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:30,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:30,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:58:30,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071769370] [2024-06-27 19:58:30,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:30,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:58:30,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:30,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:58:30,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:58:30,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:58:30,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 295 transitions, 3170 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-27 19:58:30,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:30,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:58:30,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:31,553 INFO L124 PetriNetUnfolderBase]: 3391/5688 cut-off events. [2024-06-27 19:58:31,553 INFO L125 PetriNetUnfolderBase]: For 1023317/1023317 co-relation queries the response was YES. [2024-06-27 19:58:31,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50190 conditions, 5688 events. 3391/5688 cut-off events. For 1023317/1023317 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 37636 event pairs, 853 based on Foata normal form. 4/5606 useless extension candidates. Maximal degree in co-relation 50058. Up to 5056 conditions per place. [2024-06-27 19:58:31,625 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 223 selfloop transitions, 28 changer transitions 0/310 dead transitions. [2024-06-27 19:58:31,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 310 transitions, 3760 flow [2024-06-27 19:58:31,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:58:31,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:58:31,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 19:58:31,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 19:58:31,626 INFO L175 Difference]: Start difference. First operand has 273 places, 295 transitions, 3170 flow. Second operand 8 states and 152 transitions. [2024-06-27 19:58:31,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 310 transitions, 3760 flow [2024-06-27 19:58:33,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 310 transitions, 3640 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 19:58:33,126 INFO L231 Difference]: Finished difference. Result has 275 places, 298 transitions, 3174 flow [2024-06-27 19:58:33,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3050, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3174, PETRI_PLACES=275, PETRI_TRANSITIONS=298} [2024-06-27 19:58:33,126 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 231 predicate places. [2024-06-27 19:58:33,126 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 298 transitions, 3174 flow [2024-06-27 19:58:33,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-27 19:58:33,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:33,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:58:33,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 19:58:33,127 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:33,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:33,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1110761485, now seen corresponding path program 3 times [2024-06-27 19:58:33,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:33,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932671026] [2024-06-27 19:58:33,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:33,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:33,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:34,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:34,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:34,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932671026] [2024-06-27 19:58:34,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932671026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:34,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:34,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:58:34,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243123862] [2024-06-27 19:58:34,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:34,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:58:34,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:34,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:58:34,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:58:34,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:58:34,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 298 transitions, 3174 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-27 19:58:34,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:34,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:58:34,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:35,397 INFO L124 PetriNetUnfolderBase]: 3383/5693 cut-off events. [2024-06-27 19:58:35,397 INFO L125 PetriNetUnfolderBase]: For 1034038/1034060 co-relation queries the response was YES. [2024-06-27 19:58:35,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50723 conditions, 5693 events. 3383/5693 cut-off events. For 1034038/1034060 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 37731 event pairs, 840 based on Foata normal form. 4/5614 useless extension candidates. Maximal degree in co-relation 50591. Up to 5079 conditions per place. [2024-06-27 19:58:35,468 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 239 selfloop transitions, 17 changer transitions 0/315 dead transitions. [2024-06-27 19:58:35,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 315 transitions, 3793 flow [2024-06-27 19:58:35,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:58:35,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:58:35,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 19:58:35,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-27 19:58:35,469 INFO L175 Difference]: Start difference. First operand has 275 places, 298 transitions, 3174 flow. Second operand 8 states and 149 transitions. [2024-06-27 19:58:35,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 315 transitions, 3793 flow [2024-06-27 19:58:36,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 315 transitions, 3691 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-27 19:58:36,909 INFO L231 Difference]: Finished difference. Result has 278 places, 304 transitions, 3207 flow [2024-06-27 19:58:36,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3072, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3207, PETRI_PLACES=278, PETRI_TRANSITIONS=304} [2024-06-27 19:58:36,909 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 234 predicate places. [2024-06-27 19:58:36,909 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 304 transitions, 3207 flow [2024-06-27 19:58:36,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-27 19:58:36,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:36,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:58:36,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 19:58:36,910 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:36,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:36,910 INFO L85 PathProgramCache]: Analyzing trace with hash -71619561, now seen corresponding path program 4 times [2024-06-27 19:58:36,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:36,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813953348] [2024-06-27 19:58:36,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:36,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:36,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:37,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:37,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:37,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813953348] [2024-06-27 19:58:37,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813953348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:37,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:37,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:58:37,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951980591] [2024-06-27 19:58:37,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:37,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:58:37,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:37,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:58:37,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:58:38,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:58:38,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 304 transitions, 3207 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-27 19:58:38,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:38,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:58:38,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:39,020 INFO L124 PetriNetUnfolderBase]: 3393/5689 cut-off events. [2024-06-27 19:58:39,020 INFO L125 PetriNetUnfolderBase]: For 1057174/1057212 co-relation queries the response was YES. [2024-06-27 19:58:39,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51004 conditions, 5689 events. 3393/5689 cut-off events. For 1057174/1057212 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 37606 event pairs, 846 based on Foata normal form. 6/5608 useless extension candidates. Maximal degree in co-relation 50870. Up to 5015 conditions per place. [2024-06-27 19:58:39,091 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 216 selfloop transitions, 49 changer transitions 0/324 dead transitions. [2024-06-27 19:58:39,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 324 transitions, 4111 flow [2024-06-27 19:58:39,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:58:39,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:58:39,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-27 19:58:39,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-27 19:58:39,093 INFO L175 Difference]: Start difference. First operand has 278 places, 304 transitions, 3207 flow. Second operand 8 states and 158 transitions. [2024-06-27 19:58:39,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 324 transitions, 4111 flow [2024-06-27 19:58:40,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 324 transitions, 4023 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-27 19:58:40,806 INFO L231 Difference]: Finished difference. Result has 282 places, 310 transitions, 3361 flow [2024-06-27 19:58:40,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3119, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3361, PETRI_PLACES=282, PETRI_TRANSITIONS=310} [2024-06-27 19:58:40,806 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 238 predicate places. [2024-06-27 19:58:40,806 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 310 transitions, 3361 flow [2024-06-27 19:58:40,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-27 19:58:40,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:40,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:58:40,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 19:58:40,807 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:40,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:40,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1376994569, now seen corresponding path program 1 times [2024-06-27 19:58:40,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:40,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605673213] [2024-06-27 19:58:40,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:40,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:40,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:41,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:41,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:41,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605673213] [2024-06-27 19:58:41,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605673213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:41,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:41,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:58:41,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989410347] [2024-06-27 19:58:41,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:41,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:58:41,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:41,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:58:41,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:58:41,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:58:41,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 310 transitions, 3361 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 19:58:41,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:41,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:58:41,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:42,744 INFO L124 PetriNetUnfolderBase]: 3664/6045 cut-off events. [2024-06-27 19:58:42,744 INFO L125 PetriNetUnfolderBase]: For 1067913/1067915 co-relation queries the response was YES. [2024-06-27 19:58:42,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53630 conditions, 6045 events. 3664/6045 cut-off events. For 1067913/1067915 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 38943 event pairs, 865 based on Foata normal form. 4/6040 useless extension candidates. Maximal degree in co-relation 53494. Up to 5619 conditions per place. [2024-06-27 19:58:42,819 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 307 selfloop transitions, 17 changer transitions 0/334 dead transitions. [2024-06-27 19:58:42,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 334 transitions, 4127 flow [2024-06-27 19:58:42,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:58:42,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:58:42,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 19:58:42,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 19:58:42,820 INFO L175 Difference]: Start difference. First operand has 282 places, 310 transitions, 3361 flow. Second operand 8 states and 152 transitions. [2024-06-27 19:58:42,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 334 transitions, 4127 flow [2024-06-27 19:58:44,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 334 transitions, 4012 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-27 19:58:44,606 INFO L231 Difference]: Finished difference. Result has 286 places, 313 transitions, 3356 flow [2024-06-27 19:58:44,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3246, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3356, PETRI_PLACES=286, PETRI_TRANSITIONS=313} [2024-06-27 19:58:44,606 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 242 predicate places. [2024-06-27 19:58:44,606 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 313 transitions, 3356 flow [2024-06-27 19:58:44,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 19:58:44,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:44,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:58:44,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 19:58:44,607 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:44,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:44,607 INFO L85 PathProgramCache]: Analyzing trace with hash -529712008, now seen corresponding path program 1 times [2024-06-27 19:58:44,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:44,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991331533] [2024-06-27 19:58:44,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:44,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:44,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:45,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:45,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:45,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991331533] [2024-06-27 19:58:45,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991331533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:45,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:45,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:58:45,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408570095] [2024-06-27 19:58:45,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:45,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:58:45,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:45,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:58:45,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:58:45,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:58:45,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 313 transitions, 3356 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 19:58:45,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:45,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:58:45,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:46,738 INFO L124 PetriNetUnfolderBase]: 3674/6059 cut-off events. [2024-06-27 19:58:46,738 INFO L125 PetriNetUnfolderBase]: For 1091876/1091878 co-relation queries the response was YES. [2024-06-27 19:58:46,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54333 conditions, 6059 events. 3674/6059 cut-off events. For 1091876/1091878 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 38969 event pairs, 862 based on Foata normal form. 5/6059 useless extension candidates. Maximal degree in co-relation 54195. Up to 5639 conditions per place. [2024-06-27 19:58:46,806 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 307 selfloop transitions, 17 changer transitions 0/334 dead transitions. [2024-06-27 19:58:46,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 334 transitions, 4128 flow [2024-06-27 19:58:46,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:58:46,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:58:46,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 19:58:46,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-27 19:58:46,807 INFO L175 Difference]: Start difference. First operand has 286 places, 313 transitions, 3356 flow. Second operand 8 states and 149 transitions. [2024-06-27 19:58:46,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 334 transitions, 4128 flow [2024-06-27 19:58:48,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 334 transitions, 4040 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-27 19:58:48,207 INFO L231 Difference]: Finished difference. Result has 288 places, 316 transitions, 3388 flow [2024-06-27 19:58:48,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3268, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3388, PETRI_PLACES=288, PETRI_TRANSITIONS=316} [2024-06-27 19:58:48,208 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 244 predicate places. [2024-06-27 19:58:48,208 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 316 transitions, 3388 flow [2024-06-27 19:58:48,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 19:58:48,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:48,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:58:48,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 19:58:48,208 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:48,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:48,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1182294487, now seen corresponding path program 2 times [2024-06-27 19:58:48,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:48,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226628537] [2024-06-27 19:58:48,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:48,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:48,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:48,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:48,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:48,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226628537] [2024-06-27 19:58:48,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226628537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:48,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:48,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:58:48,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399922946] [2024-06-27 19:58:48,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:48,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:58:48,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:48,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:58:48,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:58:49,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:58:49,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 316 transitions, 3388 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 19:58:49,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:49,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:58:49,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:50,374 INFO L124 PetriNetUnfolderBase]: 3684/6075 cut-off events. [2024-06-27 19:58:50,375 INFO L125 PetriNetUnfolderBase]: For 1106947/1106949 co-relation queries the response was YES. [2024-06-27 19:58:50,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54846 conditions, 6075 events. 3684/6075 cut-off events. For 1106947/1106949 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 39085 event pairs, 862 based on Foata normal form. 4/6074 useless extension candidates. Maximal degree in co-relation 54707. Up to 5638 conditions per place. [2024-06-27 19:58:50,456 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 306 selfloop transitions, 22 changer transitions 0/338 dead transitions. [2024-06-27 19:58:50,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 338 transitions, 4166 flow [2024-06-27 19:58:50,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:58:50,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:58:50,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 19:58:50,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 19:58:50,457 INFO L175 Difference]: Start difference. First operand has 288 places, 316 transitions, 3388 flow. Second operand 8 states and 152 transitions. [2024-06-27 19:58:50,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 338 transitions, 4166 flow [2024-06-27 19:58:52,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 338 transitions, 4070 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-27 19:58:52,023 INFO L231 Difference]: Finished difference. Result has 290 places, 319 transitions, 3420 flow [2024-06-27 19:58:52,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3292, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3420, PETRI_PLACES=290, PETRI_TRANSITIONS=319} [2024-06-27 19:58:52,024 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 246 predicate places. [2024-06-27 19:58:52,024 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 319 transitions, 3420 flow [2024-06-27 19:58:52,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 19:58:52,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:52,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:58:52,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 19:58:52,024 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:52,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:52,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1187858677, now seen corresponding path program 3 times [2024-06-27 19:58:52,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:52,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655619827] [2024-06-27 19:58:52,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:52,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:52,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:52,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:52,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:52,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655619827] [2024-06-27 19:58:52,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655619827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:52,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:52,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:58:52,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914194668] [2024-06-27 19:58:52,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:52,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:58:52,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:52,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:58:52,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:58:52,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:58:52,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 319 transitions, 3420 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 19:58:52,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:52,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:58:52,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:54,124 INFO L124 PetriNetUnfolderBase]: 3694/6091 cut-off events. [2024-06-27 19:58:54,124 INFO L125 PetriNetUnfolderBase]: For 1128297/1128299 co-relation queries the response was YES. [2024-06-27 19:58:54,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55575 conditions, 6091 events. 3694/6091 cut-off events. For 1128297/1128299 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 39234 event pairs, 862 based on Foata normal form. 4/6090 useless extension candidates. Maximal degree in co-relation 55435. Up to 5640 conditions per place. [2024-06-27 19:58:54,194 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 299 selfloop transitions, 29 changer transitions 0/338 dead transitions. [2024-06-27 19:58:54,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 338 transitions, 4196 flow [2024-06-27 19:58:54,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:58:54,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:58:54,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 19:58:54,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-27 19:58:54,195 INFO L175 Difference]: Start difference. First operand has 290 places, 319 transitions, 3420 flow. Second operand 8 states and 151 transitions. [2024-06-27 19:58:54,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 338 transitions, 4196 flow [2024-06-27 19:58:55,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 338 transitions, 4090 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-27 19:58:55,796 INFO L231 Difference]: Finished difference. Result has 292 places, 322 transitions, 3462 flow [2024-06-27 19:58:55,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3314, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3462, PETRI_PLACES=292, PETRI_TRANSITIONS=322} [2024-06-27 19:58:55,797 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 248 predicate places. [2024-06-27 19:58:55,797 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 322 transitions, 3462 flow [2024-06-27 19:58:55,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 19:58:55,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:55,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:58:55,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 19:58:55,797 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:55,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:55,798 INFO L85 PathProgramCache]: Analyzing trace with hash -524147818, now seen corresponding path program 2 times [2024-06-27 19:58:55,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:55,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733370913] [2024-06-27 19:58:55,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:55,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:55,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:56,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:56,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:56,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733370913] [2024-06-27 19:58:56,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733370913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:56,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:56,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:58:56,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362643519] [2024-06-27 19:58:56,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:56,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:58:56,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:56,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:58:56,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:58:56,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:58:56,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 322 transitions, 3462 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 19:58:56,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:56,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:58:56,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:58,114 INFO L124 PetriNetUnfolderBase]: 3697/6096 cut-off events. [2024-06-27 19:58:58,115 INFO L125 PetriNetUnfolderBase]: For 1153132/1153139 co-relation queries the response was YES. [2024-06-27 19:58:58,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56187 conditions, 6096 events. 3697/6096 cut-off events. For 1153132/1153139 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 39273 event pairs, 862 based on Foata normal form. 4/6095 useless extension candidates. Maximal degree in co-relation 56046. Up to 5669 conditions per place. [2024-06-27 19:58:58,189 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 307 selfloop transitions, 22 changer transitions 0/339 dead transitions. [2024-06-27 19:58:58,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 339 transitions, 4232 flow [2024-06-27 19:58:58,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:58:58,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:58:58,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 19:58:58,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-27 19:58:58,190 INFO L175 Difference]: Start difference. First operand has 292 places, 322 transitions, 3462 flow. Second operand 8 states and 147 transitions. [2024-06-27 19:58:58,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 339 transitions, 4232 flow [2024-06-27 19:58:59,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 339 transitions, 4106 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-27 19:58:59,652 INFO L231 Difference]: Finished difference. Result has 294 places, 325 transitions, 3470 flow [2024-06-27 19:58:59,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3336, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3470, PETRI_PLACES=294, PETRI_TRANSITIONS=325} [2024-06-27 19:58:59,653 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 250 predicate places. [2024-06-27 19:58:59,653 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 325 transitions, 3470 flow [2024-06-27 19:58:59,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 19:58:59,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:59,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:58:59,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 19:58:59,653 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:59,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:59,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1187866334, now seen corresponding path program 3 times [2024-06-27 19:58:59,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:59,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179458492] [2024-06-27 19:58:59,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:59,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:59,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:00,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:59:00,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:00,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179458492] [2024-06-27 19:59:00,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179458492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:00,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:00,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:59:00,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640664954] [2024-06-27 19:59:00,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:00,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:59:00,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:00,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:59:00,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:59:00,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:59:00,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 325 transitions, 3470 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 19:59:00,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:00,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:59:00,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:01,827 INFO L124 PetriNetUnfolderBase]: 3725/6135 cut-off events. [2024-06-27 19:59:01,827 INFO L125 PetriNetUnfolderBase]: For 1188330/1188337 co-relation queries the response was YES. [2024-06-27 19:59:01,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57196 conditions, 6135 events. 3725/6135 cut-off events. For 1188330/1188337 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 39526 event pairs, 863 based on Foata normal form. 10/6139 useless extension candidates. Maximal degree in co-relation 57054. Up to 5682 conditions per place. [2024-06-27 19:59:01,902 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 307 selfloop transitions, 34 changer transitions 0/351 dead transitions. [2024-06-27 19:59:01,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 351 transitions, 4650 flow [2024-06-27 19:59:01,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:59:01,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:59:01,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 19:59:01,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-27 19:59:01,904 INFO L175 Difference]: Start difference. First operand has 294 places, 325 transitions, 3470 flow. Second operand 8 states and 151 transitions. [2024-06-27 19:59:01,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 351 transitions, 4650 flow [2024-06-27 19:59:03,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 351 transitions, 4538 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-27 19:59:03,930 INFO L231 Difference]: Finished difference. Result has 297 places, 334 transitions, 3693 flow [2024-06-27 19:59:03,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3358, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3693, PETRI_PLACES=297, PETRI_TRANSITIONS=334} [2024-06-27 19:59:03,930 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 253 predicate places. [2024-06-27 19:59:03,930 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 334 transitions, 3693 flow [2024-06-27 19:59:03,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 19:59:03,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:59:03,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:59:03,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 19:59:03,930 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:59:03,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:59:03,931 INFO L85 PathProgramCache]: Analyzing trace with hash -71435328, now seen corresponding path program 4 times [2024-06-27 19:59:03,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:59:03,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581724927] [2024-06-27 19:59:03,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:59:03,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:59:03,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:04,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:59:04,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:04,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581724927] [2024-06-27 19:59:04,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581724927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:04,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:04,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:59:04,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591349503] [2024-06-27 19:59:04,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:04,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:59:04,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:04,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:59:04,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:59:04,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:59:04,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 334 transitions, 3693 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 19:59:04,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:04,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:59:04,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:06,171 INFO L124 PetriNetUnfolderBase]: 3737/6155 cut-off events. [2024-06-27 19:59:06,172 INFO L125 PetriNetUnfolderBase]: For 1209511/1209516 co-relation queries the response was YES. [2024-06-27 19:59:06,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57934 conditions, 6155 events. 3737/6155 cut-off events. For 1209511/1209516 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 39683 event pairs, 869 based on Foata normal form. 6/6154 useless extension candidates. Maximal degree in co-relation 57790. Up to 5643 conditions per place. [2024-06-27 19:59:06,247 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 288 selfloop transitions, 57 changer transitions 0/355 dead transitions. [2024-06-27 19:59:06,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 355 transitions, 4841 flow [2024-06-27 19:59:06,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:59:06,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:59:06,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 19:59:06,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 19:59:06,247 INFO L175 Difference]: Start difference. First operand has 297 places, 334 transitions, 3693 flow. Second operand 8 states and 152 transitions. [2024-06-27 19:59:06,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 355 transitions, 4841 flow [2024-06-27 19:59:08,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 355 transitions, 4733 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-27 19:59:08,160 INFO L231 Difference]: Finished difference. Result has 301 places, 340 transitions, 3899 flow [2024-06-27 19:59:08,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3585, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3899, PETRI_PLACES=301, PETRI_TRANSITIONS=340} [2024-06-27 19:59:08,160 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 257 predicate places. [2024-06-27 19:59:08,160 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 340 transitions, 3899 flow [2024-06-27 19:59:08,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 19:59:08,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:59:08,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:59:08,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 19:59:08,160 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:59:08,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:59:08,161 INFO L85 PathProgramCache]: Analyzing trace with hash -80639755, now seen corresponding path program 4 times [2024-06-27 19:59:08,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:59:08,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586732983] [2024-06-27 19:59:08,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:59:08,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:59:08,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:08,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:59:08,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:08,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586732983] [2024-06-27 19:59:08,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586732983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:08,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:08,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:59:08,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021421027] [2024-06-27 19:59:08,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:08,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:59:08,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:08,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:59:08,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:59:09,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:59:09,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 340 transitions, 3899 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 19:59:09,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:09,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:59:09,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:10,327 INFO L124 PetriNetUnfolderBase]: 3739/6160 cut-off events. [2024-06-27 19:59:10,327 INFO L125 PetriNetUnfolderBase]: For 1222070/1222075 co-relation queries the response was YES. [2024-06-27 19:59:10,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58300 conditions, 6160 events. 3739/6160 cut-off events. For 1222070/1222075 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 39695 event pairs, 876 based on Foata normal form. 4/6157 useless extension candidates. Maximal degree in co-relation 58154. Up to 5688 conditions per place. [2024-06-27 19:59:10,408 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 308 selfloop transitions, 38 changer transitions 0/356 dead transitions. [2024-06-27 19:59:10,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 356 transitions, 4715 flow [2024-06-27 19:59:10,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:59:10,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:59:10,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 19:59:10,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-27 19:59:10,410 INFO L175 Difference]: Start difference. First operand has 301 places, 340 transitions, 3899 flow. Second operand 8 states and 150 transitions. [2024-06-27 19:59:10,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 356 transitions, 4715 flow [2024-06-27 19:59:11,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 356 transitions, 4583 flow, removed 49 selfloop flow, removed 4 redundant places. [2024-06-27 19:59:11,958 INFO L231 Difference]: Finished difference. Result has 305 places, 343 transitions, 3945 flow [2024-06-27 19:59:11,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3769, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3945, PETRI_PLACES=305, PETRI_TRANSITIONS=343} [2024-06-27 19:59:11,958 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 261 predicate places. [2024-06-27 19:59:11,958 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 343 transitions, 3945 flow [2024-06-27 19:59:11,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 19:59:11,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:59:11,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:59:11,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 19:59:11,959 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:59:11,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:59:11,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1120286452, now seen corresponding path program 5 times [2024-06-27 19:59:11,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:59:11,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782691258] [2024-06-27 19:59:11,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:59:11,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:59:11,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:12,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:59:12,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:12,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782691258] [2024-06-27 19:59:12,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782691258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:12,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:12,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:59:12,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806450848] [2024-06-27 19:59:12,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:12,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:59:12,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:12,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:59:12,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:59:13,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:59:13,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 343 transitions, 3945 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 19:59:13,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:13,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:59:13,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:14,346 INFO L124 PetriNetUnfolderBase]: 3747/6172 cut-off events. [2024-06-27 19:59:14,347 INFO L125 PetriNetUnfolderBase]: For 1247326/1247331 co-relation queries the response was YES. [2024-06-27 19:59:14,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58783 conditions, 6172 events. 3747/6172 cut-off events. For 1247326/1247331 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 39787 event pairs, 872 based on Foata normal form. 7/6171 useless extension candidates. Maximal degree in co-relation 58635. Up to 5727 conditions per place. [2024-06-27 19:59:14,432 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 319 selfloop transitions, 29 changer transitions 0/358 dead transitions. [2024-06-27 19:59:14,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 358 transitions, 4769 flow [2024-06-27 19:59:14,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:59:14,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:59:14,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 19:59:14,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-27 19:59:14,433 INFO L175 Difference]: Start difference. First operand has 305 places, 343 transitions, 3945 flow. Second operand 8 states and 147 transitions. [2024-06-27 19:59:14,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 358 transitions, 4769 flow [2024-06-27 19:59:16,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 358 transitions, 4615 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-27 19:59:16,096 INFO L231 Difference]: Finished difference. Result has 307 places, 346 transitions, 3953 flow [2024-06-27 19:59:16,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3791, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3953, PETRI_PLACES=307, PETRI_TRANSITIONS=346} [2024-06-27 19:59:16,096 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 263 predicate places. [2024-06-27 19:59:16,096 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 346 transitions, 3953 flow [2024-06-27 19:59:16,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 19:59:16,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:59:16,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:59:16,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 19:59:16,096 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:59:16,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:59:16,097 INFO L85 PathProgramCache]: Analyzing trace with hash -80632098, now seen corresponding path program 6 times [2024-06-27 19:59:16,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:59:16,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067833885] [2024-06-27 19:59:16,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:59:16,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:59:16,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:17,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:59:17,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:17,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067833885] [2024-06-27 19:59:17,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067833885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:17,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:17,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:59:17,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117236805] [2024-06-27 19:59:17,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:17,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:59:17,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:17,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:59:17,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:59:17,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:59:17,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 346 transitions, 3953 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 19:59:17,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:17,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:59:17,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:18,375 INFO L124 PetriNetUnfolderBase]: 3742/6165 cut-off events. [2024-06-27 19:59:18,375 INFO L125 PetriNetUnfolderBase]: For 1250254/1250259 co-relation queries the response was YES. [2024-06-27 19:59:18,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58447 conditions, 6165 events. 3742/6165 cut-off events. For 1250254/1250259 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 39737 event pairs, 870 based on Foata normal form. 6/6164 useless extension candidates. Maximal degree in co-relation 58298. Up to 5705 conditions per place. [2024-06-27 19:59:18,453 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 314 selfloop transitions, 36 changer transitions 0/360 dead transitions. [2024-06-27 19:59:18,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 360 transitions, 4919 flow [2024-06-27 19:59:18,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:59:18,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:59:18,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 19:59:18,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-27 19:59:18,454 INFO L175 Difference]: Start difference. First operand has 307 places, 346 transitions, 3953 flow. Second operand 8 states and 151 transitions. [2024-06-27 19:59:18,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 360 transitions, 4919 flow [2024-06-27 19:59:20,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 360 transitions, 4791 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-27 19:59:20,084 INFO L231 Difference]: Finished difference. Result has 309 places, 346 transitions, 3904 flow [2024-06-27 19:59:20,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3825, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3904, PETRI_PLACES=309, PETRI_TRANSITIONS=346} [2024-06-27 19:59:20,084 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 265 predicate places. [2024-06-27 19:59:20,084 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 346 transitions, 3904 flow [2024-06-27 19:59:20,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 19:59:20,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:59:20,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:59:20,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 19:59:20,085 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:59:20,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:59:20,085 INFO L85 PathProgramCache]: Analyzing trace with hash -71096715, now seen corresponding path program 1 times [2024-06-27 19:59:20,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:59:20,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960546441] [2024-06-27 19:59:20,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:59:20,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:59:20,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:21,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:59:21,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:21,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960546441] [2024-06-27 19:59:21,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960546441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:21,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:21,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:59:21,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095021791] [2024-06-27 19:59:21,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:21,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:59:21,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:21,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:59:21,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:59:21,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 19:59:21,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 346 transitions, 3904 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:59:21,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:21,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 19:59:21,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:22,844 INFO L124 PetriNetUnfolderBase]: 3516/5876 cut-off events. [2024-06-27 19:59:22,844 INFO L125 PetriNetUnfolderBase]: For 1263507/1263529 co-relation queries the response was YES. [2024-06-27 19:59:22,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57110 conditions, 5876 events. 3516/5876 cut-off events. For 1263507/1263529 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 38641 event pairs, 842 based on Foata normal form. 4/5797 useless extension candidates. Maximal degree in co-relation 56960. Up to 5207 conditions per place. [2024-06-27 19:59:22,927 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 276 selfloop transitions, 18 changer transitions 0/360 dead transitions. [2024-06-27 19:59:22,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 360 transitions, 4592 flow [2024-06-27 19:59:22,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:59:22,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:59:22,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 19:59:22,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-27 19:59:22,928 INFO L175 Difference]: Start difference. First operand has 309 places, 346 transitions, 3904 flow. Second operand 8 states and 150 transitions. [2024-06-27 19:59:22,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 360 transitions, 4592 flow [2024-06-27 19:59:24,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 360 transitions, 4372 flow, removed 43 selfloop flow, removed 8 redundant places. [2024-06-27 19:59:24,887 INFO L231 Difference]: Finished difference. Result has 309 places, 348 transitions, 3801 flow [2024-06-27 19:59:24,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3684, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3801, PETRI_PLACES=309, PETRI_TRANSITIONS=348} [2024-06-27 19:59:24,888 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 265 predicate places. [2024-06-27 19:59:24,888 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 348 transitions, 3801 flow [2024-06-27 19:59:24,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:59:24,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:59:24,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:59:24,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 19:59:24,888 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:59:24,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:59:24,889 INFO L85 PathProgramCache]: Analyzing trace with hash 38513199, now seen corresponding path program 1 times [2024-06-27 19:59:24,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:59:24,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304744614] [2024-06-27 19:59:24,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:59:24,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:59:24,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:25,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:59:25,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:25,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304744614] [2024-06-27 19:59:25,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304744614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:25,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:25,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:59:25,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985307970] [2024-06-27 19:59:25,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:25,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:59:25,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:25,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:59:25,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:59:25,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:59:25,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 348 transitions, 3801 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 19:59:25,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:25,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:59:25,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:26,987 INFO L124 PetriNetUnfolderBase]: 3710/6079 cut-off events. [2024-06-27 19:59:26,987 INFO L125 PetriNetUnfolderBase]: For 1274129/1274129 co-relation queries the response was YES. [2024-06-27 19:59:27,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58417 conditions, 6079 events. 3710/6079 cut-off events. For 1274129/1274129 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 38951 event pairs, 701 based on Foata normal form. 2/6038 useless extension candidates. Maximal degree in co-relation 58268. Up to 5544 conditions per place. [2024-06-27 19:59:27,073 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 327 selfloop transitions, 15 changer transitions 0/378 dead transitions. [2024-06-27 19:59:27,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 378 transitions, 4617 flow [2024-06-27 19:59:27,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:59:27,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:59:27,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-27 19:59:27,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-27 19:59:27,074 INFO L175 Difference]: Start difference. First operand has 309 places, 348 transitions, 3801 flow. Second operand 8 states and 157 transitions. [2024-06-27 19:59:27,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 378 transitions, 4617 flow [2024-06-27 19:59:29,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 378 transitions, 4496 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-27 19:59:29,671 INFO L231 Difference]: Finished difference. Result has 310 places, 350 transitions, 3781 flow [2024-06-27 19:59:29,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3680, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3781, PETRI_PLACES=310, PETRI_TRANSITIONS=350} [2024-06-27 19:59:29,672 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 266 predicate places. [2024-06-27 19:59:29,672 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 350 transitions, 3781 flow [2024-06-27 19:59:29,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 19:59:29,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:59:29,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:59:29,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 19:59:29,672 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)] === [2024-06-27 19:59:29,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:59:29,672 INFO L85 PathProgramCache]: Analyzing trace with hash 48988719, now seen corresponding path program 2 times [2024-06-27 19:59:29,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:59:29,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352508495] [2024-06-27 19:59:29,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:59:29,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:59:29,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:30,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:59:30,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:30,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352508495] [2024-06-27 19:59:30,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352508495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:30,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:30,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:59:30,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105482169] [2024-06-27 19:59:30,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:30,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:59:30,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:30,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:59:30,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:59:30,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:59:30,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 350 transitions, 3781 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 19:59:30,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:30,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:59:30,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:31,830 INFO L124 PetriNetUnfolderBase]: 3723/6102 cut-off events. [2024-06-27 19:59:31,830 INFO L125 PetriNetUnfolderBase]: For 1294064/1294064 co-relation queries the response was YES. [2024-06-27 19:59:31,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58798 conditions, 6102 events. 3723/6102 cut-off events. For 1294064/1294064 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 39238 event pairs, 855 based on Foata normal form. 2/6031 useless extension candidates. Maximal degree in co-relation 58649. Up to 5592 conditions per place. [2024-06-27 19:59:31,912 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 327 selfloop transitions, 16 changer transitions 0/379 dead transitions. [2024-06-27 19:59:31,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 379 transitions, 4615 flow [2024-06-27 19:59:31,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:59:31,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:59:31,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-27 19:59:31,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-27 19:59:31,913 INFO L175 Difference]: Start difference. First operand has 310 places, 350 transitions, 3781 flow. Second operand 8 states and 154 transitions. [2024-06-27 19:59:31,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 379 transitions, 4615 flow [2024-06-27 19:59:34,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 379 transitions, 4530 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-27 19:59:34,083 INFO L231 Difference]: Finished difference. Result has 313 places, 355 transitions, 3835 flow [2024-06-27 19:59:34,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3696, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3835, PETRI_PLACES=313, PETRI_TRANSITIONS=355} [2024-06-27 19:59:34,083 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 269 predicate places. [2024-06-27 19:59:34,083 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 355 transitions, 3835 flow [2024-06-27 19:59:34,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 19:59:34,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:59:34,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:59:34,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 19:59:34,084 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)] === [2024-06-27 19:59:34,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:59:34,084 INFO L85 PathProgramCache]: Analyzing trace with hash 381192345, now seen corresponding path program 1 times [2024-06-27 19:59:34,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:59:34,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124255480] [2024-06-27 19:59:34,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:59:34,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:59:34,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:34,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:59:34,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:34,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124255480] [2024-06-27 19:59:34,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124255480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:34,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:34,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:59:34,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518870206] [2024-06-27 19:59:34,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:34,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:59:34,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:34,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:59:34,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:59:34,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:59:34,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 355 transitions, 3835 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 19:59:34,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:34,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:59:34,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:36,192 INFO L124 PetriNetUnfolderBase]: 3728/6109 cut-off events. [2024-06-27 19:59:36,192 INFO L125 PetriNetUnfolderBase]: For 1311240/1311240 co-relation queries the response was YES. [2024-06-27 19:59:36,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59135 conditions, 6109 events. 3728/6109 cut-off events. For 1311240/1311240 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 39338 event pairs, 854 based on Foata normal form. 1/6037 useless extension candidates. Maximal degree in co-relation 58984. Up to 5596 conditions per place. [2024-06-27 19:59:36,280 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 331 selfloop transitions, 17 changer transitions 0/384 dead transitions. [2024-06-27 19:59:36,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 384 transitions, 4695 flow [2024-06-27 19:59:36,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:59:36,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:59:36,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-27 19:59:36,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-27 19:59:36,281 INFO L175 Difference]: Start difference. First operand has 313 places, 355 transitions, 3835 flow. Second operand 8 states and 157 transitions. [2024-06-27 19:59:36,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 384 transitions, 4695 flow [2024-06-27 19:59:38,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 384 transitions, 4604 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-27 19:59:38,482 INFO L231 Difference]: Finished difference. Result has 316 places, 358 transitions, 3888 flow [2024-06-27 19:59:38,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3744, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3888, PETRI_PLACES=316, PETRI_TRANSITIONS=358} [2024-06-27 19:59:38,482 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 272 predicate places. [2024-06-27 19:59:38,482 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 358 transitions, 3888 flow [2024-06-27 19:59:38,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 19:59:38,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:59:38,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:59:38,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 19:59:38,483 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)] === [2024-06-27 19:59:38,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:59:38,483 INFO L85 PathProgramCache]: Analyzing trace with hash 139544319, now seen corresponding path program 2 times [2024-06-27 19:59:38,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:59:38,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366920515] [2024-06-27 19:59:38,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:59:38,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:59:38,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:39,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:59:39,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:39,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366920515] [2024-06-27 19:59:39,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366920515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:39,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:39,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:59:39,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047148100] [2024-06-27 19:59:39,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:39,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:59:39,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:39,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:59:39,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:59:39,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:59:39,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 358 transitions, 3888 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 19:59:39,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:39,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:59:39,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:40,653 INFO L124 PetriNetUnfolderBase]: 3733/6116 cut-off events. [2024-06-27 19:59:40,654 INFO L125 PetriNetUnfolderBase]: For 1334554/1334554 co-relation queries the response was YES. [2024-06-27 19:59:40,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59718 conditions, 6116 events. 3733/6116 cut-off events. For 1334554/1334554 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 39393 event pairs, 854 based on Foata normal form. 1/6044 useless extension candidates. Maximal degree in co-relation 59566. Up to 5597 conditions per place. [2024-06-27 19:59:40,737 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 329 selfloop transitions, 23 changer transitions 0/388 dead transitions. [2024-06-27 19:59:40,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 388 transitions, 4764 flow [2024-06-27 19:59:40,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:59:40,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:59:40,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-27 19:59:40,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-27 19:59:40,738 INFO L175 Difference]: Start difference. First operand has 316 places, 358 transitions, 3888 flow. Second operand 9 states and 173 transitions. [2024-06-27 19:59:40,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 388 transitions, 4764 flow [2024-06-27 19:59:42,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 388 transitions, 4642 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-27 19:59:42,926 INFO L231 Difference]: Finished difference. Result has 319 places, 361 transitions, 3928 flow [2024-06-27 19:59:42,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3766, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3928, PETRI_PLACES=319, PETRI_TRANSITIONS=361} [2024-06-27 19:59:42,926 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 275 predicate places. [2024-06-27 19:59:42,926 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 361 transitions, 3928 flow [2024-06-27 19:59:42,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 19:59:42,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:59:42,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:59:42,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 19:59:42,927 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)] === [2024-06-27 19:59:42,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:59:42,927 INFO L85 PathProgramCache]: Analyzing trace with hash 393074769, now seen corresponding path program 3 times [2024-06-27 19:59:42,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:59:42,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211122889] [2024-06-27 19:59:42,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:59:42,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:59:42,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:43,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:59:43,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:43,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211122889] [2024-06-27 19:59:43,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211122889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:43,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:43,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:59:43,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555710299] [2024-06-27 19:59:43,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:43,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:59:43,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:43,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:59:43,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:59:43,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:59:43,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 361 transitions, 3928 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 19:59:43,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:43,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:59:43,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:45,159 INFO L124 PetriNetUnfolderBase]: 3741/6128 cut-off events. [2024-06-27 19:59:45,159 INFO L125 PetriNetUnfolderBase]: For 1367962/1367962 co-relation queries the response was YES. [2024-06-27 19:59:45,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60395 conditions, 6128 events. 3741/6128 cut-off events. For 1367962/1367962 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 39452 event pairs, 854 based on Foata normal form. 2/6057 useless extension candidates. Maximal degree in co-relation 60242. Up to 5612 conditions per place. [2024-06-27 19:59:45,251 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 324 selfloop transitions, 21 changer transitions 0/381 dead transitions. [2024-06-27 19:59:45,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 381 transitions, 4736 flow [2024-06-27 19:59:45,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:59:45,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:59:45,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 19:59:45,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-27 19:59:45,252 INFO L175 Difference]: Start difference. First operand has 319 places, 361 transitions, 3928 flow. Second operand 8 states and 150 transitions. [2024-06-27 19:59:45,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 381 transitions, 4736 flow [2024-06-27 19:59:47,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 381 transitions, 4596 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-27 19:59:47,663 INFO L231 Difference]: Finished difference. Result has 320 places, 363 transitions, 3913 flow [2024-06-27 19:59:47,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3788, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3913, PETRI_PLACES=320, PETRI_TRANSITIONS=363} [2024-06-27 19:59:47,663 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 276 predicate places. [2024-06-27 19:59:47,663 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 363 transitions, 3913 flow [2024-06-27 19:59:47,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 19:59:47,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:59:47,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:59:47,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 19:59:47,664 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)] === [2024-06-27 19:59:47,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:59:47,664 INFO L85 PathProgramCache]: Analyzing trace with hash 156843051, now seen corresponding path program 1 times [2024-06-27 19:59:47,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:59:47,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203102533] [2024-06-27 19:59:47,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:59:47,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:59:47,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:48,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:59:48,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:48,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203102533] [2024-06-27 19:59:48,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203102533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:48,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:48,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:59:48,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184548943] [2024-06-27 19:59:48,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:48,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:59:48,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:48,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:59:48,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:59:48,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:59:48,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 363 transitions, 3913 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) [2024-06-27 19:59:48,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:48,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:59:48,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:49,805 INFO L124 PetriNetUnfolderBase]: 3949/6400 cut-off events. [2024-06-27 19:59:49,806 INFO L125 PetriNetUnfolderBase]: For 1385663/1385666 co-relation queries the response was YES. [2024-06-27 19:59:49,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61978 conditions, 6400 events. 3949/6400 cut-off events. For 1385663/1385666 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 40506 event pairs, 911 based on Foata normal form. 3/6400 useless extension candidates. Maximal degree in co-relation 61824. Up to 6029 conditions per place. [2024-06-27 19:59:49,891 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 355 selfloop transitions, 29 changer transitions 0/389 dead transitions. [2024-06-27 19:59:49,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 389 transitions, 4841 flow [2024-06-27 19:59:49,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:59:49,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:59:49,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 19:59:49,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-27 19:59:49,892 INFO L175 Difference]: Start difference. First operand has 320 places, 363 transitions, 3913 flow. Second operand 8 states and 151 transitions. [2024-06-27 19:59:49,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 389 transitions, 4841 flow [2024-06-27 19:59:52,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 389 transitions, 4704 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-27 19:59:52,102 INFO L231 Difference]: Finished difference. Result has 321 places, 366 transitions, 3948 flow [2024-06-27 19:59:52,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3776, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3948, PETRI_PLACES=321, PETRI_TRANSITIONS=366} [2024-06-27 19:59:52,102 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 277 predicate places. [2024-06-27 19:59:52,102 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 366 transitions, 3948 flow [2024-06-27 19:59:52,102 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) [2024-06-27 19:59:52,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:59:52,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:59:52,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 19:59:52,102 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)] === [2024-06-27 19:59:52,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:59:52,103 INFO L85 PathProgramCache]: Analyzing trace with hash 156664305, now seen corresponding path program 3 times [2024-06-27 19:59:52,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:59:52,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754683423] [2024-06-27 19:59:52,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:59:52,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:59:52,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:52,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:59:52,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:52,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754683423] [2024-06-27 19:59:52,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754683423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:52,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:52,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:59:52,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032116191] [2024-06-27 19:59:52,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:52,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:59:52,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:52,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:59:52,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:59:52,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:59:52,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 366 transitions, 3948 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 19:59:52,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:52,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:59:52,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:54,269 INFO L124 PetriNetUnfolderBase]: 3751/6145 cut-off events. [2024-06-27 19:59:54,269 INFO L125 PetriNetUnfolderBase]: For 1405063/1405066 co-relation queries the response was YES. [2024-06-27 19:59:54,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61202 conditions, 6145 events. 3751/6145 cut-off events. For 1405063/1405066 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 39596 event pairs, 857 based on Foata normal form. 3/6074 useless extension candidates. Maximal degree in co-relation 61049. Up to 5582 conditions per place. [2024-06-27 19:59:54,352 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 326 selfloop transitions, 29 changer transitions 0/392 dead transitions. [2024-06-27 19:59:54,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 392 transitions, 4830 flow [2024-06-27 19:59:54,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:59:54,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:59:54,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-27 19:59:54,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-27 19:59:54,353 INFO L175 Difference]: Start difference. First operand has 321 places, 366 transitions, 3948 flow. Second operand 8 states and 158 transitions. [2024-06-27 19:59:54,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 392 transitions, 4830 flow [2024-06-27 19:59:56,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 392 transitions, 4680 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-27 19:59:56,316 INFO L231 Difference]: Finished difference. Result has 323 places, 369 transitions, 3982 flow [2024-06-27 19:59:56,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3798, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3982, PETRI_PLACES=323, PETRI_TRANSITIONS=369} [2024-06-27 19:59:56,316 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 279 predicate places. [2024-06-27 19:59:56,317 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 369 transitions, 3982 flow [2024-06-27 19:59:56,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 19:59:56,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:59:56,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:59:56,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 19:59:56,317 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)] === [2024-06-27 19:59:56,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:59:56,317 INFO L85 PathProgramCache]: Analyzing trace with hash 157022355, now seen corresponding path program 4 times [2024-06-27 19:59:56,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:59:56,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217943136] [2024-06-27 19:59:56,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:59:56,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:59:56,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:57,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:59:57,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:57,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217943136] [2024-06-27 19:59:57,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217943136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:57,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:57,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:59:57,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443860724] [2024-06-27 19:59:57,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:57,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:59:57,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:57,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:59:57,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:59:57,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 19:59:57,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 369 transitions, 3982 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 19:59:57,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:57,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 19:59:57,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:58,434 INFO L124 PetriNetUnfolderBase]: 3756/6152 cut-off events. [2024-06-27 19:59:58,434 INFO L125 PetriNetUnfolderBase]: For 1432882/1432885 co-relation queries the response was YES. [2024-06-27 19:59:58,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61827 conditions, 6152 events. 3756/6152 cut-off events. For 1432882/1432885 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 39720 event pairs, 857 based on Foata normal form. 3/6081 useless extension candidates. Maximal degree in co-relation 61673. Up to 5580 conditions per place. [2024-06-27 19:59:58,520 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 318 selfloop transitions, 37 changer transitions 0/392 dead transitions. [2024-06-27 19:59:58,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 392 transitions, 4862 flow [2024-06-27 19:59:58,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:59:58,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:59:58,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 19:59:58,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-27 19:59:58,521 INFO L175 Difference]: Start difference. First operand has 323 places, 369 transitions, 3982 flow. Second operand 8 states and 156 transitions. [2024-06-27 19:59:58,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 392 transitions, 4862 flow [2024-06-27 20:00:00,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 392 transitions, 4700 flow, removed 54 selfloop flow, removed 6 redundant places. [2024-06-27 20:00:00,567 INFO L231 Difference]: Finished difference. Result has 325 places, 372 transitions, 4026 flow [2024-06-27 20:00:00,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3820, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4026, PETRI_PLACES=325, PETRI_TRANSITIONS=372} [2024-06-27 20:00:00,567 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 281 predicate places. [2024-06-27 20:00:00,567 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 372 transitions, 4026 flow [2024-06-27 20:00:00,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:00:00,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:00,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:00,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 20:00:00,567 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)] === [2024-06-27 20:00:00,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:00,568 INFO L85 PathProgramCache]: Analyzing trace with hash 144162203, now seen corresponding path program 1 times [2024-06-27 20:00:00,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:00,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605639677] [2024-06-27 20:00:00,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:00,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:00,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:01,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:01,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:01,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605639677] [2024-06-27 20:00:01,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605639677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:01,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:01,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:00:01,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801234026] [2024-06-27 20:00:01,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:01,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:00:01,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:01,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:00:01,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:00:01,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:00:01,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 372 transitions, 4026 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:00:01,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:01,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:00:01,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:02,841 INFO L124 PetriNetUnfolderBase]: 3761/6159 cut-off events. [2024-06-27 20:00:02,841 INFO L125 PetriNetUnfolderBase]: For 1458270/1458273 co-relation queries the response was YES. [2024-06-27 20:00:02,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62403 conditions, 6159 events. 3761/6159 cut-off events. For 1458270/1458273 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 39661 event pairs, 856 based on Foata normal form. 3/6088 useless extension candidates. Maximal degree in co-relation 62248. Up to 5635 conditions per place. [2024-06-27 20:00:02,929 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 336 selfloop transitions, 22 changer transitions 0/395 dead transitions. [2024-06-27 20:00:02,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 395 transitions, 4862 flow [2024-06-27 20:00:02,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:00:02,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:00:02,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 20:00:02,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-27 20:00:02,930 INFO L175 Difference]: Start difference. First operand has 325 places, 372 transitions, 4026 flow. Second operand 8 states and 153 transitions. [2024-06-27 20:00:02,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 395 transitions, 4862 flow [2024-06-27 20:00:05,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 395 transitions, 4678 flow, removed 57 selfloop flow, removed 6 redundant places. [2024-06-27 20:00:05,113 INFO L231 Difference]: Finished difference. Result has 327 places, 375 transitions, 3968 flow [2024-06-27 20:00:05,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3842, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3968, PETRI_PLACES=327, PETRI_TRANSITIONS=375} [2024-06-27 20:00:05,113 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 283 predicate places. [2024-06-27 20:00:05,114 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 375 transitions, 3968 flow [2024-06-27 20:00:05,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:00:05,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:05,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:05,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 20:00:05,114 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)] === [2024-06-27 20:00:05,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:05,114 INFO L85 PathProgramCache]: Analyzing trace with hash 157022541, now seen corresponding path program 2 times [2024-06-27 20:00:05,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:05,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786626756] [2024-06-27 20:00:05,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:05,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:05,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:05,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:05,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:05,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786626756] [2024-06-27 20:00:05,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786626756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:05,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:05,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:00:05,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178707857] [2024-06-27 20:00:05,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:05,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:00:05,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:05,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:00:05,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:00:05,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:00:05,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 375 transitions, 3968 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) [2024-06-27 20:00:05,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:05,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:00:05,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:07,408 INFO L124 PetriNetUnfolderBase]: 3969/6430 cut-off events. [2024-06-27 20:00:07,408 INFO L125 PetriNetUnfolderBase]: For 1482924/1482927 co-relation queries the response was YES. [2024-06-27 20:00:07,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64155 conditions, 6430 events. 3969/6430 cut-off events. For 1482924/1482927 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 40742 event pairs, 910 based on Foata normal form. 3/6430 useless extension candidates. Maximal degree in co-relation 63999. Up to 6051 conditions per place. [2024-06-27 20:00:07,501 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 359 selfloop transitions, 34 changer transitions 0/398 dead transitions. [2024-06-27 20:00:07,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 398 transitions, 4918 flow [2024-06-27 20:00:07,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:00:07,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:00:07,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 20:00:07,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-27 20:00:07,502 INFO L175 Difference]: Start difference. First operand has 327 places, 375 transitions, 3968 flow. Second operand 8 states and 150 transitions. [2024-06-27 20:00:07,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 398 transitions, 4918 flow [2024-06-27 20:00:09,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 398 transitions, 4814 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-27 20:00:09,386 INFO L231 Difference]: Finished difference. Result has 329 places, 378 transitions, 4058 flow [2024-06-27 20:00:09,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3864, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4058, PETRI_PLACES=329, PETRI_TRANSITIONS=378} [2024-06-27 20:00:09,386 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 285 predicate places. [2024-06-27 20:00:09,386 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 378 transitions, 4058 flow [2024-06-27 20:00:09,387 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) [2024-06-27 20:00:09,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:09,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:09,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 20:00:09,387 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)] === [2024-06-27 20:00:09,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:09,387 INFO L85 PathProgramCache]: Analyzing trace with hash -932322565, now seen corresponding path program 2 times [2024-06-27 20:00:09,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:09,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945503445] [2024-06-27 20:00:09,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:09,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:09,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:10,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:10,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:10,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945503445] [2024-06-27 20:00:10,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945503445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:10,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:10,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:00:10,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360309656] [2024-06-27 20:00:10,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:10,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:00:10,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:10,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:00:10,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:00:10,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:00:10,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 378 transitions, 4058 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:00:10,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:10,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:00:10,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:11,792 INFO L124 PetriNetUnfolderBase]: 3779/6184 cut-off events. [2024-06-27 20:00:11,793 INFO L125 PetriNetUnfolderBase]: For 1511633/1511636 co-relation queries the response was YES. [2024-06-27 20:00:11,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63679 conditions, 6184 events. 3779/6184 cut-off events. For 1511633/1511636 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 39853 event pairs, 856 based on Foata normal form. 3/6113 useless extension candidates. Maximal degree in co-relation 63522. Up to 5637 conditions per place. [2024-06-27 20:00:11,887 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 329 selfloop transitions, 37 changer transitions 0/404 dead transitions. [2024-06-27 20:00:11,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 404 transitions, 5245 flow [2024-06-27 20:00:11,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:00:11,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:00:11,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 20:00:11,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-27 20:00:11,888 INFO L175 Difference]: Start difference. First operand has 329 places, 378 transitions, 4058 flow. Second operand 8 states and 153 transitions. [2024-06-27 20:00:11,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 404 transitions, 5245 flow [2024-06-27 20:00:14,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 404 transitions, 5073 flow, removed 54 selfloop flow, removed 6 redundant places. [2024-06-27 20:00:14,159 INFO L231 Difference]: Finished difference. Result has 332 places, 386 transitions, 4157 flow [2024-06-27 20:00:14,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3886, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4157, PETRI_PLACES=332, PETRI_TRANSITIONS=386} [2024-06-27 20:00:14,160 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 288 predicate places. [2024-06-27 20:00:14,160 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 386 transitions, 4157 flow [2024-06-27 20:00:14,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:00:14,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:14,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:14,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 20:00:14,160 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)] === [2024-06-27 20:00:14,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:14,160 INFO L85 PathProgramCache]: Analyzing trace with hash -433281943, now seen corresponding path program 5 times [2024-06-27 20:00:14,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:14,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80781695] [2024-06-27 20:00:14,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:14,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:14,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:14,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:14,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:14,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80781695] [2024-06-27 20:00:14,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80781695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:14,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:14,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:00:14,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474416285] [2024-06-27 20:00:14,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:14,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:00:14,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:14,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:00:14,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:00:15,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:00:15,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 386 transitions, 4157 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:00:15,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:15,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:00:15,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:16,477 INFO L124 PetriNetUnfolderBase]: 3784/6192 cut-off events. [2024-06-27 20:00:16,477 INFO L125 PetriNetUnfolderBase]: For 1538087/1538087 co-relation queries the response was YES. [2024-06-27 20:00:16,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64253 conditions, 6192 events. 3784/6192 cut-off events. For 1538087/1538087 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 39913 event pairs, 852 based on Foata normal form. 1/6120 useless extension candidates. Maximal degree in co-relation 64094. Up to 5671 conditions per place. [2024-06-27 20:00:16,567 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 346 selfloop transitions, 22 changer transitions 0/406 dead transitions. [2024-06-27 20:00:16,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 406 transitions, 5067 flow [2024-06-27 20:00:16,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:00:16,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:00:16,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 20:00:16,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-27 20:00:16,568 INFO L175 Difference]: Start difference. First operand has 332 places, 386 transitions, 4157 flow. Second operand 8 states and 150 transitions. [2024-06-27 20:00:16,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 406 transitions, 5067 flow [2024-06-27 20:00:19,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 406 transitions, 4943 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-06-27 20:00:19,034 INFO L231 Difference]: Finished difference. Result has 336 places, 389 transitions, 4221 flow [2024-06-27 20:00:19,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4033, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4221, PETRI_PLACES=336, PETRI_TRANSITIONS=389} [2024-06-27 20:00:19,035 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 292 predicate places. [2024-06-27 20:00:19,035 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 389 transitions, 4221 flow [2024-06-27 20:00:19,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:00:19,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:19,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:19,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 20:00:19,035 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)] === [2024-06-27 20:00:19,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:19,035 INFO L85 PathProgramCache]: Analyzing trace with hash -932619483, now seen corresponding path program 3 times [2024-06-27 20:00:19,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:19,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482465007] [2024-06-27 20:00:19,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:19,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:19,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:19,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:19,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:19,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482465007] [2024-06-27 20:00:19,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482465007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:19,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:19,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:00:19,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701919591] [2024-06-27 20:00:19,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:19,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:00:19,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:19,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:00:19,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:00:19,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:00:19,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 389 transitions, 4221 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) [2024-06-27 20:00:19,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:19,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:00:19,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:21,344 INFO L124 PetriNetUnfolderBase]: 4000/6475 cut-off events. [2024-06-27 20:00:21,345 INFO L125 PetriNetUnfolderBase]: For 1577564/1577567 co-relation queries the response was YES. [2024-06-27 20:00:21,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66521 conditions, 6475 events. 4000/6475 cut-off events. For 1577564/1577567 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 41044 event pairs, 910 based on Foata normal form. 3/6475 useless extension candidates. Maximal degree in co-relation 66360. Up to 6074 conditions per place. [2024-06-27 20:00:21,442 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 362 selfloop transitions, 46 changer transitions 0/413 dead transitions. [2024-06-27 20:00:21,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 413 transitions, 5575 flow [2024-06-27 20:00:21,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:00:21,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:00:21,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-27 20:00:21,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-27 20:00:21,443 INFO L175 Difference]: Start difference. First operand has 336 places, 389 transitions, 4221 flow. Second operand 8 states and 148 transitions. [2024-06-27 20:00:21,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 413 transitions, 5575 flow [2024-06-27 20:00:24,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 413 transitions, 5409 flow, removed 63 selfloop flow, removed 6 redundant places. [2024-06-27 20:00:24,106 INFO L231 Difference]: Finished difference. Result has 338 places, 395 transitions, 4407 flow [2024-06-27 20:00:24,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4055, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4407, PETRI_PLACES=338, PETRI_TRANSITIONS=395} [2024-06-27 20:00:24,107 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 294 predicate places. [2024-06-27 20:00:24,107 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 395 transitions, 4407 flow [2024-06-27 20:00:24,107 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) [2024-06-27 20:00:24,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:24,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:24,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 20:00:24,107 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)] === [2024-06-27 20:00:24,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:24,108 INFO L85 PathProgramCache]: Analyzing trace with hash 393198149, now seen corresponding path program 3 times [2024-06-27 20:00:24,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:24,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863275456] [2024-06-27 20:00:24,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:24,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:24,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:25,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:25,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:25,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863275456] [2024-06-27 20:00:25,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863275456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:25,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:25,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:00:25,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374757445] [2024-06-27 20:00:25,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:25,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:00:25,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:25,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:00:25,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:00:25,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:00:25,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 395 transitions, 4407 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:00:25,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:25,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:00:25,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:26,463 INFO L124 PetriNetUnfolderBase]: 3802/6220 cut-off events. [2024-06-27 20:00:26,464 INFO L125 PetriNetUnfolderBase]: For 1600644/1600647 co-relation queries the response was YES. [2024-06-27 20:00:26,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65735 conditions, 6220 events. 3802/6220 cut-off events. For 1600644/1600647 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 40096 event pairs, 856 based on Foata normal form. 3/6149 useless extension candidates. Maximal degree in co-relation 65573. Up to 5676 conditions per place. [2024-06-27 20:00:26,556 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 345 selfloop transitions, 30 changer transitions 0/415 dead transitions. [2024-06-27 20:00:26,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 415 transitions, 5266 flow [2024-06-27 20:00:26,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:00:26,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:00:26,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 20:00:26,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-27 20:00:26,557 INFO L175 Difference]: Start difference. First operand has 338 places, 395 transitions, 4407 flow. Second operand 8 states and 151 transitions. [2024-06-27 20:00:26,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 415 transitions, 5266 flow [2024-06-27 20:00:28,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 415 transitions, 5098 flow, removed 68 selfloop flow, removed 4 redundant places. [2024-06-27 20:00:28,769 INFO L231 Difference]: Finished difference. Result has 342 places, 398 transitions, 4378 flow [2024-06-27 20:00:28,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4239, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4378, PETRI_PLACES=342, PETRI_TRANSITIONS=398} [2024-06-27 20:00:28,769 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 298 predicate places. [2024-06-27 20:00:28,769 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 398 transitions, 4378 flow [2024-06-27 20:00:28,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:00:28,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:28,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:28,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 20:00:28,770 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)] === [2024-06-27 20:00:28,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:28,770 INFO L85 PathProgramCache]: Analyzing trace with hash 393197715, now seen corresponding path program 6 times [2024-06-27 20:00:28,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:28,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153323881] [2024-06-27 20:00:28,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:28,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:28,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:29,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:29,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:29,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153323881] [2024-06-27 20:00:29,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153323881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:29,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:29,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:00:29,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194107784] [2024-06-27 20:00:29,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:29,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:00:29,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:29,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:00:29,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:00:29,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:00:29,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 398 transitions, 4378 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:00:29,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:29,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:00:29,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:31,079 INFO L124 PetriNetUnfolderBase]: 3815/6240 cut-off events. [2024-06-27 20:00:31,080 INFO L125 PetriNetUnfolderBase]: For 1634034/1634037 co-relation queries the response was YES. [2024-06-27 20:00:31,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66372 conditions, 6240 events. 3815/6240 cut-off events. For 1634034/1634037 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 40307 event pairs, 856 based on Foata normal form. 3/6169 useless extension candidates. Maximal degree in co-relation 66208. Up to 5625 conditions per place. [2024-06-27 20:00:31,189 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 323 selfloop transitions, 59 changer transitions 0/422 dead transitions. [2024-06-27 20:00:31,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 422 transitions, 5716 flow [2024-06-27 20:00:31,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:00:31,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:00:31,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 20:00:31,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-27 20:00:31,190 INFO L175 Difference]: Start difference. First operand has 342 places, 398 transitions, 4378 flow. Second operand 8 states and 155 transitions. [2024-06-27 20:00:31,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 422 transitions, 5716 flow [2024-06-27 20:00:33,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 422 transitions, 5608 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-27 20:00:33,915 INFO L231 Difference]: Finished difference. Result has 344 places, 404 transitions, 4680 flow [2024-06-27 20:00:33,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4270, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4680, PETRI_PLACES=344, PETRI_TRANSITIONS=404} [2024-06-27 20:00:33,915 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 300 predicate places. [2024-06-27 20:00:33,915 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 404 transitions, 4680 flow [2024-06-27 20:00:33,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:00:33,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:33,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:33,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 20:00:33,915 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:00:33,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:33,916 INFO L85 PathProgramCache]: Analyzing trace with hash -4980492, now seen corresponding path program 1 times [2024-06-27 20:00:33,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:33,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557697420] [2024-06-27 20:00:33,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:33,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:33,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:35,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:35,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:35,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557697420] [2024-06-27 20:00:35,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557697420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:35,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:35,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:00:35,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416726627] [2024-06-27 20:00:35,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:35,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:00:35,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:35,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:00:35,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:00:35,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:00:35,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 404 transitions, 4680 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) [2024-06-27 20:00:35,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:35,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:00:35,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:37,042 INFO L124 PetriNetUnfolderBase]: 4223/6889 cut-off events. [2024-06-27 20:00:37,043 INFO L125 PetriNetUnfolderBase]: For 1738380/1738383 co-relation queries the response was YES. [2024-06-27 20:00:37,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70644 conditions, 6889 events. 4223/6889 cut-off events. For 1738380/1738383 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 44667 event pairs, 886 based on Foata normal form. 12/6898 useless extension candidates. Maximal degree in co-relation 70479. Up to 5628 conditions per place. [2024-06-27 20:00:37,166 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 350 selfloop transitions, 109 changer transitions 0/464 dead transitions. [2024-06-27 20:00:37,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 464 transitions, 6056 flow [2024-06-27 20:00:37,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:00:37,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:00:37,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 219 transitions. [2024-06-27 20:00:37,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630021141649049 [2024-06-27 20:00:37,167 INFO L175 Difference]: Start difference. First operand has 344 places, 404 transitions, 4680 flow. Second operand 11 states and 219 transitions. [2024-06-27 20:00:37,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 464 transitions, 6056 flow [2024-06-27 20:00:40,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 464 transitions, 5870 flow, removed 74 selfloop flow, removed 4 redundant places. [2024-06-27 20:00:40,623 INFO L231 Difference]: Finished difference. Result has 353 places, 418 transitions, 5004 flow [2024-06-27 20:00:40,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4494, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5004, PETRI_PLACES=353, PETRI_TRANSITIONS=418} [2024-06-27 20:00:40,624 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 309 predicate places. [2024-06-27 20:00:40,624 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 418 transitions, 5004 flow [2024-06-27 20:00:40,624 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) [2024-06-27 20:00:40,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:40,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:40,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 20:00:40,626 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)] === [2024-06-27 20:00:40,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:40,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1617635529, now seen corresponding path program 4 times [2024-06-27 20:00:40,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:40,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722228082] [2024-06-27 20:00:40,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:40,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:40,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:41,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:41,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:41,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722228082] [2024-06-27 20:00:41,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722228082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:41,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:41,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:00:41,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70872062] [2024-06-27 20:00:41,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:41,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:00:41,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:41,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:00:41,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:00:41,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:00:41,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 418 transitions, 5004 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:00:41,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:41,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:00:41,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:43,172 INFO L124 PetriNetUnfolderBase]: 4015/6616 cut-off events. [2024-06-27 20:00:43,172 INFO L125 PetriNetUnfolderBase]: For 1698697/1698697 co-relation queries the response was YES. [2024-06-27 20:00:43,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70078 conditions, 6616 events. 4015/6616 cut-off events. For 1698697/1698697 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 43560 event pairs, 882 based on Foata normal form. 2/6542 useless extension candidates. Maximal degree in co-relation 69909. Up to 6045 conditions per place. [2024-06-27 20:00:43,271 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 364 selfloop transitions, 28 changer transitions 0/432 dead transitions. [2024-06-27 20:00:43,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 432 transitions, 5908 flow [2024-06-27 20:00:43,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:00:43,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:00:43,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 20:00:43,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-27 20:00:43,273 INFO L175 Difference]: Start difference. First operand has 353 places, 418 transitions, 5004 flow. Second operand 8 states and 146 transitions. [2024-06-27 20:00:43,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 432 transitions, 5908 flow [2024-06-27 20:00:46,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 432 transitions, 5668 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-27 20:00:46,051 INFO L231 Difference]: Finished difference. Result has 355 places, 420 transitions, 4921 flow [2024-06-27 20:00:46,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4764, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4921, PETRI_PLACES=355, PETRI_TRANSITIONS=420} [2024-06-27 20:00:46,051 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 311 predicate places. [2024-06-27 20:00:46,051 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 420 transitions, 4921 flow [2024-06-27 20:00:46,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:00:46,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:46,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:46,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 20:00:46,052 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)] === [2024-06-27 20:00:46,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:46,052 INFO L85 PathProgramCache]: Analyzing trace with hash 262561271, now seen corresponding path program 4 times [2024-06-27 20:00:46,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:46,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394923193] [2024-06-27 20:00:46,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:46,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:46,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:46,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:46,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:46,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394923193] [2024-06-27 20:00:46,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394923193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:46,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:46,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:00:46,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289955073] [2024-06-27 20:00:46,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:46,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:00:46,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:46,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:00:46,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:00:46,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:00:46,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 420 transitions, 4921 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) [2024-06-27 20:00:46,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:46,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:00:46,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:48,467 INFO L124 PetriNetUnfolderBase]: 4223/6889 cut-off events. [2024-06-27 20:00:48,467 INFO L125 PetriNetUnfolderBase]: For 1709531/1709536 co-relation queries the response was YES. [2024-06-27 20:00:48,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71074 conditions, 6889 events. 4223/6889 cut-off events. For 1709531/1709536 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 44673 event pairs, 925 based on Foata normal form. 5/6892 useless extension candidates. Maximal degree in co-relation 70904. Up to 6480 conditions per place. [2024-06-27 20:00:48,565 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 408 selfloop transitions, 30 changer transitions 0/443 dead transitions. [2024-06-27 20:00:48,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 443 transitions, 5959 flow [2024-06-27 20:00:48,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:00:48,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:00:48,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 20:00:48,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-27 20:00:48,566 INFO L175 Difference]: Start difference. First operand has 355 places, 420 transitions, 4921 flow. Second operand 8 states and 147 transitions. [2024-06-27 20:00:48,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 443 transitions, 5959 flow [2024-06-27 20:00:52,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 443 transitions, 5754 flow, removed 47 selfloop flow, removed 8 redundant places. [2024-06-27 20:00:52,401 INFO L231 Difference]: Finished difference. Result has 355 places, 423 transitions, 4900 flow [2024-06-27 20:00:52,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4716, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4900, PETRI_PLACES=355, PETRI_TRANSITIONS=423} [2024-06-27 20:00:52,401 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 311 predicate places. [2024-06-27 20:00:52,401 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 423 transitions, 4900 flow [2024-06-27 20:00:52,402 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) [2024-06-27 20:00:52,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:52,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:52,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 20:00:52,402 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)] === [2024-06-27 20:00:52,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:52,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1845147467, now seen corresponding path program 5 times [2024-06-27 20:00:52,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:52,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755657501] [2024-06-27 20:00:52,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:52,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:52,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:53,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:53,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:53,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755657501] [2024-06-27 20:00:53,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755657501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:53,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:53,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:00:53,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437624641] [2024-06-27 20:00:53,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:53,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:00:53,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:53,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:00:53,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:00:53,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:00:53,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 423 transitions, 4900 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) [2024-06-27 20:00:53,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:53,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:00:53,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:54,799 INFO L124 PetriNetUnfolderBase]: 4228/6896 cut-off events. [2024-06-27 20:00:54,800 INFO L125 PetriNetUnfolderBase]: For 1733305/1733310 co-relation queries the response was YES. [2024-06-27 20:00:54,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71217 conditions, 6896 events. 4228/6896 cut-off events. For 1733305/1733310 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 44687 event pairs, 925 based on Foata normal form. 5/6899 useless extension candidates. Maximal degree in co-relation 71047. Up to 6487 conditions per place. [2024-06-27 20:00:54,905 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 412 selfloop transitions, 29 changer transitions 0/446 dead transitions. [2024-06-27 20:00:54,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 446 transitions, 5950 flow [2024-06-27 20:00:54,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:00:54,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:00:54,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-27 20:00:54,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-27 20:00:54,906 INFO L175 Difference]: Start difference. First operand has 355 places, 423 transitions, 4900 flow. Second operand 8 states and 148 transitions. [2024-06-27 20:00:54,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 446 transitions, 5950 flow [2024-06-27 20:00:58,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 446 transitions, 5794 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-27 20:00:58,931 INFO L231 Difference]: Finished difference. Result has 357 places, 426 transitions, 4932 flow [2024-06-27 20:00:58,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4744, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4932, PETRI_PLACES=357, PETRI_TRANSITIONS=426} [2024-06-27 20:00:58,932 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 313 predicate places. [2024-06-27 20:00:58,932 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 426 transitions, 4932 flow [2024-06-27 20:00:58,932 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) [2024-06-27 20:00:58,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:58,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:58,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 20:00:58,932 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:00:58,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:58,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1389703273, now seen corresponding path program 7 times [2024-06-27 20:00:58,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:58,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765526325] [2024-06-27 20:00:58,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:58,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:58,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:59,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:59,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:59,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765526325] [2024-06-27 20:00:59,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765526325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:59,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:59,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:00:59,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281534044] [2024-06-27 20:00:59,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:59,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:00:59,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:59,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:00:59,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:00:59,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:00:59,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 426 transitions, 4932 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:00:59,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:59,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:00:59,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:01,362 INFO L124 PetriNetUnfolderBase]: 4030/6639 cut-off events. [2024-06-27 20:01:01,362 INFO L125 PetriNetUnfolderBase]: For 1754699/1754699 co-relation queries the response was YES. [2024-06-27 20:01:01,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70147 conditions, 6639 events. 4030/6639 cut-off events. For 1754699/1754699 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 43726 event pairs, 882 based on Foata normal form. 1/6564 useless extension candidates. Maximal degree in co-relation 69976. Up to 6029 conditions per place. [2024-06-27 20:01:01,471 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 378 selfloop transitions, 29 changer transitions 0/449 dead transitions. [2024-06-27 20:01:01,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 449 transitions, 5928 flow [2024-06-27 20:01:01,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:01:01,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:01:01,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 20:01:01,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-27 20:01:01,472 INFO L175 Difference]: Start difference. First operand has 357 places, 426 transitions, 4932 flow. Second operand 8 states and 155 transitions. [2024-06-27 20:01:01,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 449 transitions, 5928 flow [2024-06-27 20:01:05,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 449 transitions, 5768 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-27 20:01:05,930 INFO L231 Difference]: Finished difference. Result has 359 places, 429 transitions, 4974 flow [2024-06-27 20:01:05,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4772, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4974, PETRI_PLACES=359, PETRI_TRANSITIONS=429} [2024-06-27 20:01:05,931 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 315 predicate places. [2024-06-27 20:01:05,931 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 429 transitions, 4974 flow [2024-06-27 20:01:05,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:01:05,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:05,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:05,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 20:01:05,932 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)] === [2024-06-27 20:01:05,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:05,932 INFO L85 PathProgramCache]: Analyzing trace with hash 2050329029, now seen corresponding path program 6 times [2024-06-27 20:01:05,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:05,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107716936] [2024-06-27 20:01:05,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:05,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:05,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:06,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:06,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:06,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107716936] [2024-06-27 20:01:06,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107716936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:06,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:06,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:01:06,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505259630] [2024-06-27 20:01:06,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:06,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:01:06,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:06,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:01:06,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:01:06,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:01:06,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 429 transitions, 4974 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) [2024-06-27 20:01:06,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:06,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:01:06,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:08,580 INFO L124 PetriNetUnfolderBase]: 4230/6901 cut-off events. [2024-06-27 20:01:08,580 INFO L125 PetriNetUnfolderBase]: For 1774340/1774345 co-relation queries the response was YES. [2024-06-27 20:01:08,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71382 conditions, 6901 events. 4230/6901 cut-off events. For 1774340/1774345 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 44820 event pairs, 925 based on Foata normal form. 5/6904 useless extension candidates. Maximal degree in co-relation 71210. Up to 6481 conditions per place. [2024-06-27 20:01:08,669 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 404 selfloop transitions, 37 changer transitions 0/446 dead transitions. [2024-06-27 20:01:08,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 446 transitions, 5898 flow [2024-06-27 20:01:08,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:01:08,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:01:08,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 20:01:08,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-27 20:01:08,670 INFO L175 Difference]: Start difference. First operand has 359 places, 429 transitions, 4974 flow. Second operand 8 states and 146 transitions. [2024-06-27 20:01:08,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 446 transitions, 5898 flow [2024-06-27 20:01:11,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 446 transitions, 5648 flow, removed 98 selfloop flow, removed 6 redundant places. [2024-06-27 20:01:11,870 INFO L231 Difference]: Finished difference. Result has 361 places, 429 transitions, 4804 flow [2024-06-27 20:01:11,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4724, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4804, PETRI_PLACES=361, PETRI_TRANSITIONS=429} [2024-06-27 20:01:11,870 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 317 predicate places. [2024-06-27 20:01:11,870 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 429 transitions, 4804 flow [2024-06-27 20:01:11,870 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) [2024-06-27 20:01:11,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:11,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:11,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 20:01:11,871 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)] === [2024-06-27 20:01:11,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:11,871 INFO L85 PathProgramCache]: Analyzing trace with hash 963050391, now seen corresponding path program 8 times [2024-06-27 20:01:11,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:11,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880573518] [2024-06-27 20:01:11,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:11,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:11,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:12,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:12,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:12,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880573518] [2024-06-27 20:01:12,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880573518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:12,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:12,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:01:12,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525160728] [2024-06-27 20:01:12,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:12,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:01:12,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:12,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:01:12,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:01:12,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:01:12,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 429 transitions, 4804 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:01:12,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:12,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:01:12,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:14,486 INFO L124 PetriNetUnfolderBase]: 4024/6631 cut-off events. [2024-06-27 20:01:14,487 INFO L125 PetriNetUnfolderBase]: For 1784550/1784550 co-relation queries the response was YES. [2024-06-27 20:01:14,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69877 conditions, 6631 events. 4024/6631 cut-off events. For 1784550/1784550 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 43677 event pairs, 882 based on Foata normal form. 1/6556 useless extension candidates. Maximal degree in co-relation 69704. Up to 6016 conditions per place. [2024-06-27 20:01:14,598 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 370 selfloop transitions, 34 changer transitions 0/446 dead transitions. [2024-06-27 20:01:14,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 446 transitions, 5654 flow [2024-06-27 20:01:14,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:01:14,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:01:14,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-27 20:01:14,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-27 20:01:14,599 INFO L175 Difference]: Start difference. First operand has 361 places, 429 transitions, 4804 flow. Second operand 8 states and 154 transitions. [2024-06-27 20:01:14,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 446 transitions, 5654 flow [2024-06-27 20:01:18,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 446 transitions, 5438 flow, removed 59 selfloop flow, removed 7 redundant places. [2024-06-27 20:01:18,066 INFO L231 Difference]: Finished difference. Result has 362 places, 429 transitions, 4662 flow [2024-06-27 20:01:18,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4588, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4662, PETRI_PLACES=362, PETRI_TRANSITIONS=429} [2024-06-27 20:01:18,066 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 318 predicate places. [2024-06-27 20:01:18,066 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 429 transitions, 4662 flow [2024-06-27 20:01:18,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:01:18,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:18,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:18,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 20:01:18,067 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)] === [2024-06-27 20:01:18,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:18,067 INFO L85 PathProgramCache]: Analyzing trace with hash -2003584127, now seen corresponding path program 7 times [2024-06-27 20:01:18,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:18,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778361783] [2024-06-27 20:01:18,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:18,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:18,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:18,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:18,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:18,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778361783] [2024-06-27 20:01:18,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778361783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:18,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:18,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:01:18,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174262596] [2024-06-27 20:01:18,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:18,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:01:18,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:18,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:01:18,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:01:18,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:01:18,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 429 transitions, 4662 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) [2024-06-27 20:01:18,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:18,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:01:18,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:20,531 INFO L124 PetriNetUnfolderBase]: 4232/6904 cut-off events. [2024-06-27 20:01:20,531 INFO L125 PetriNetUnfolderBase]: For 1813732/1813737 co-relation queries the response was YES. [2024-06-27 20:01:20,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71410 conditions, 6904 events. 4232/6904 cut-off events. For 1813732/1813737 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 44779 event pairs, 925 based on Foata normal form. 5/6907 useless extension candidates. Maximal degree in co-relation 71236. Up to 6481 conditions per place. [2024-06-27 20:01:20,630 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 403 selfloop transitions, 41 changer transitions 0/449 dead transitions. [2024-06-27 20:01:20,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 449 transitions, 5726 flow [2024-06-27 20:01:20,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:01:20,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:01:20,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 20:01:20,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-27 20:01:20,631 INFO L175 Difference]: Start difference. First operand has 362 places, 429 transitions, 4662 flow. Second operand 8 states and 145 transitions. [2024-06-27 20:01:20,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 449 transitions, 5726 flow [2024-06-27 20:01:24,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 449 transitions, 5584 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-27 20:01:24,663 INFO L231 Difference]: Finished difference. Result has 363 places, 432 transitions, 4748 flow [2024-06-27 20:01:24,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4520, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4748, PETRI_PLACES=363, PETRI_TRANSITIONS=432} [2024-06-27 20:01:24,663 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 319 predicate places. [2024-06-27 20:01:24,663 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 432 transitions, 4748 flow [2024-06-27 20:01:24,663 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) [2024-06-27 20:01:24,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:24,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:24,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-27 20:01:24,663 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)] === [2024-06-27 20:01:24,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:24,664 INFO L85 PathProgramCache]: Analyzing trace with hash 255216379, now seen corresponding path program 4 times [2024-06-27 20:01:24,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:24,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199608211] [2024-06-27 20:01:24,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:24,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:24,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:25,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:25,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:25,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199608211] [2024-06-27 20:01:25,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199608211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:25,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:25,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:01:25,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592107819] [2024-06-27 20:01:25,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:25,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:01:25,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:25,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:01:25,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:01:25,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:01:25,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 432 transitions, 4748 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:01:25,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:25,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:01:25,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:27,252 INFO L124 PetriNetUnfolderBase]: 4026/6637 cut-off events. [2024-06-27 20:01:27,252 INFO L125 PetriNetUnfolderBase]: For 1827078/1827083 co-relation queries the response was YES. [2024-06-27 20:01:27,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70342 conditions, 6637 events. 4026/6637 cut-off events. For 1827078/1827083 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 43733 event pairs, 875 based on Foata normal form. 5/6568 useless extension candidates. Maximal degree in co-relation 70167. Up to 6062 conditions per place. [2024-06-27 20:01:27,353 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 385 selfloop transitions, 22 changer transitions 0/450 dead transitions. [2024-06-27 20:01:27,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 450 transitions, 5629 flow [2024-06-27 20:01:27,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:01:27,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:01:27,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 20:01:27,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-27 20:01:27,354 INFO L175 Difference]: Start difference. First operand has 363 places, 432 transitions, 4748 flow. Second operand 8 states and 150 transitions. [2024-06-27 20:01:27,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 450 transitions, 5629 flow [2024-06-27 20:01:30,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 450 transitions, 5365 flow, removed 93 selfloop flow, removed 6 redundant places. [2024-06-27 20:01:30,949 INFO L231 Difference]: Finished difference. Result has 365 places, 433 transitions, 4561 flow [2024-06-27 20:01:30,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4500, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4561, PETRI_PLACES=365, PETRI_TRANSITIONS=433} [2024-06-27 20:01:30,949 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 321 predicate places. [2024-06-27 20:01:30,949 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 433 transitions, 4561 flow [2024-06-27 20:01:30,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:01:30,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:30,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:30,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-27 20:01:30,950 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)] === [2024-06-27 20:01:30,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:30,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1830855909, now seen corresponding path program 5 times [2024-06-27 20:01:30,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:30,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430155748] [2024-06-27 20:01:30,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:30,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:30,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:31,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:31,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:31,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430155748] [2024-06-27 20:01:31,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430155748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:31,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:31,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:01:31,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514547895] [2024-06-27 20:01:31,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:31,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:01:31,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:31,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:01:31,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:01:31,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:01:31,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 433 transitions, 4561 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:01:31,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:31,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:01:31,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:33,470 INFO L124 PetriNetUnfolderBase]: 4037/6653 cut-off events. [2024-06-27 20:01:33,470 INFO L125 PetriNetUnfolderBase]: For 1861296/1861301 co-relation queries the response was YES. [2024-06-27 20:01:33,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70684 conditions, 6653 events. 4037/6653 cut-off events. For 1861296/1861301 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 43818 event pairs, 873 based on Foata normal form. 5/6584 useless extension candidates. Maximal degree in co-relation 70508. Up to 6058 conditions per place. [2024-06-27 20:01:33,577 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 373 selfloop transitions, 40 changer transitions 0/456 dead transitions. [2024-06-27 20:01:33,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 456 transitions, 5894 flow [2024-06-27 20:01:33,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:01:33,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:01:33,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 20:01:33,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-27 20:01:33,578 INFO L175 Difference]: Start difference. First operand has 365 places, 433 transitions, 4561 flow. Second operand 8 states and 150 transitions. [2024-06-27 20:01:33,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 456 transitions, 5894 flow [2024-06-27 20:01:37,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 456 transitions, 5838 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 20:01:37,244 INFO L231 Difference]: Finished difference. Result has 368 places, 441 transitions, 4817 flow [2024-06-27 20:01:37,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4505, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4817, PETRI_PLACES=368, PETRI_TRANSITIONS=441} [2024-06-27 20:01:37,244 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 324 predicate places. [2024-06-27 20:01:37,244 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 441 transitions, 4817 flow [2024-06-27 20:01:37,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:01:37,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:37,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:37,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-27 20:01:37,245 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)] === [2024-06-27 20:01:37,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:37,245 INFO L85 PathProgramCache]: Analyzing trace with hash 931035203, now seen corresponding path program 9 times [2024-06-27 20:01:37,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:37,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755234795] [2024-06-27 20:01:37,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:37,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:37,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:38,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:38,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:38,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755234795] [2024-06-27 20:01:38,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755234795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:38,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:38,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:01:38,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657581931] [2024-06-27 20:01:38,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:38,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:01:38,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:38,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:01:38,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:01:38,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:01:38,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 441 transitions, 4817 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:01:38,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:38,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:01:38,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:39,662 INFO L124 PetriNetUnfolderBase]: 4044/6659 cut-off events. [2024-06-27 20:01:39,663 INFO L125 PetriNetUnfolderBase]: For 1892311/1892311 co-relation queries the response was YES. [2024-06-27 20:01:39,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71421 conditions, 6659 events. 4044/6659 cut-off events. For 1892311/1892311 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 43893 event pairs, 880 based on Foata normal form. 1/6584 useless extension candidates. Maximal degree in co-relation 71243. Up to 6021 conditions per place. [2024-06-27 20:01:39,769 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 363 selfloop transitions, 52 changer transitions 0/458 dead transitions. [2024-06-27 20:01:39,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 458 transitions, 5833 flow [2024-06-27 20:01:39,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:01:39,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:01:39,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 20:01:39,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-27 20:01:39,769 INFO L175 Difference]: Start difference. First operand has 368 places, 441 transitions, 4817 flow. Second operand 8 states and 151 transitions. [2024-06-27 20:01:39,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 458 transitions, 5833 flow [2024-06-27 20:01:43,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 458 transitions, 5691 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-06-27 20:01:43,687 INFO L231 Difference]: Finished difference. Result has 372 places, 444 transitions, 4943 flow [2024-06-27 20:01:43,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4675, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4943, PETRI_PLACES=372, PETRI_TRANSITIONS=444} [2024-06-27 20:01:43,687 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 328 predicate places. [2024-06-27 20:01:43,687 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 444 transitions, 4943 flow [2024-06-27 20:01:43,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:01:43,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:43,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:43,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-27 20:01:43,688 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)] === [2024-06-27 20:01:43,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:43,688 INFO L85 PathProgramCache]: Analyzing trace with hash 931272539, now seen corresponding path program 8 times [2024-06-27 20:01:43,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:43,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069616627] [2024-06-27 20:01:43,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:43,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:43,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:44,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:44,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:44,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069616627] [2024-06-27 20:01:44,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069616627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:44,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:44,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:01:44,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767898478] [2024-06-27 20:01:44,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:44,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:01:44,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:44,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:01:44,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:01:44,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:01:44,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 444 transitions, 4943 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) [2024-06-27 20:01:44,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:44,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:01:44,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:46,224 INFO L124 PetriNetUnfolderBase]: 4260/6943 cut-off events. [2024-06-27 20:01:46,224 INFO L125 PetriNetUnfolderBase]: For 1938259/1938264 co-relation queries the response was YES. [2024-06-27 20:01:46,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73882 conditions, 6943 events. 4260/6943 cut-off events. For 1938259/1938264 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 45022 event pairs, 923 based on Foata normal form. 5/6946 useless extension candidates. Maximal degree in co-relation 73702. Up to 6492 conditions per place. [2024-06-27 20:01:46,339 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 397 selfloop transitions, 63 changer transitions 0/465 dead transitions. [2024-06-27 20:01:46,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 465 transitions, 6461 flow [2024-06-27 20:01:46,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:01:46,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:01:46,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 20:01:46,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-27 20:01:46,340 INFO L175 Difference]: Start difference. First operand has 372 places, 444 transitions, 4943 flow. Second operand 8 states and 145 transitions. [2024-06-27 20:01:46,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 465 transitions, 6461 flow [2024-06-27 20:01:50,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 465 transitions, 6215 flow, removed 73 selfloop flow, removed 6 redundant places. [2024-06-27 20:01:50,847 INFO L231 Difference]: Finished difference. Result has 374 places, 450 transitions, 5123 flow [2024-06-27 20:01:50,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4697, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5123, PETRI_PLACES=374, PETRI_TRANSITIONS=450} [2024-06-27 20:01:50,847 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 330 predicate places. [2024-06-27 20:01:50,847 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 450 transitions, 5123 flow [2024-06-27 20:01:50,847 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) [2024-06-27 20:01:50,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:50,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:50,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-27 20:01:50,848 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)] === [2024-06-27 20:01:50,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:50,848 INFO L85 PathProgramCache]: Analyzing trace with hash 931035389, now seen corresponding path program 9 times [2024-06-27 20:01:50,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:50,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675389105] [2024-06-27 20:01:50,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:50,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:50,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:51,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:51,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:51,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675389105] [2024-06-27 20:01:51,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675389105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:51,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:51,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:01:51,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024685411] [2024-06-27 20:01:51,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:51,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:01:51,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:51,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:01:51,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:01:51,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:01:51,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 450 transitions, 5123 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) [2024-06-27 20:01:51,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:51,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:01:51,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:53,376 INFO L124 PetriNetUnfolderBase]: 4257/6939 cut-off events. [2024-06-27 20:01:53,376 INFO L125 PetriNetUnfolderBase]: For 1958244/1958249 co-relation queries the response was YES. [2024-06-27 20:01:53,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74034 conditions, 6939 events. 4257/6939 cut-off events. For 1958244/1958249 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 45013 event pairs, 923 based on Foata normal form. 5/6942 useless extension candidates. Maximal degree in co-relation 73853. Up to 6489 conditions per place. [2024-06-27 20:01:53,488 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 397 selfloop transitions, 62 changer transitions 0/464 dead transitions. [2024-06-27 20:01:53,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 464 transitions, 6075 flow [2024-06-27 20:01:53,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:01:53,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:01:53,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 20:01:53,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-27 20:01:53,489 INFO L175 Difference]: Start difference. First operand has 374 places, 450 transitions, 5123 flow. Second operand 8 states and 144 transitions. [2024-06-27 20:01:53,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 464 transitions, 6075 flow [2024-06-27 20:01:57,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 464 transitions, 5759 flow, removed 129 selfloop flow, removed 4 redundant places. [2024-06-27 20:01:57,308 INFO L231 Difference]: Finished difference. Result has 378 places, 450 transitions, 4937 flow [2024-06-27 20:01:57,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4807, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4937, PETRI_PLACES=378, PETRI_TRANSITIONS=450} [2024-06-27 20:01:57,308 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 334 predicate places. [2024-06-27 20:01:57,308 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 450 transitions, 4937 flow [2024-06-27 20:01:57,308 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) [2024-06-27 20:01:57,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:57,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:57,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-27 20:01:57,309 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)] === [2024-06-27 20:01:57,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:57,309 INFO L85 PathProgramCache]: Analyzing trace with hash 976860395, now seen corresponding path program 6 times [2024-06-27 20:01:57,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:57,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539464164] [2024-06-27 20:01:57,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:57,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:57,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:58,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:58,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:58,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539464164] [2024-06-27 20:01:58,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539464164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:58,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:58,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:01:58,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65369505] [2024-06-27 20:01:58,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:58,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:01:58,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:58,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:01:58,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:01:58,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:01:58,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 450 transitions, 4937 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:01:58,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:58,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:01:58,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:59,846 INFO L124 PetriNetUnfolderBase]: 4051/6672 cut-off events. [2024-06-27 20:01:59,846 INFO L125 PetriNetUnfolderBase]: For 1967087/1967092 co-relation queries the response was YES. [2024-06-27 20:01:59,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72562 conditions, 6672 events. 4051/6672 cut-off events. For 1967087/1967092 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 44006 event pairs, 873 based on Foata normal form. 5/6603 useless extension candidates. Maximal degree in co-relation 72379. Up to 6084 conditions per place. [2024-06-27 20:01:59,956 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 390 selfloop transitions, 30 changer transitions 0/465 dead transitions. [2024-06-27 20:01:59,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 465 transitions, 5822 flow [2024-06-27 20:01:59,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:01:59,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:01:59,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-27 20:01:59,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-27 20:01:59,957 INFO L175 Difference]: Start difference. First operand has 378 places, 450 transitions, 4937 flow. Second operand 8 states and 148 transitions. [2024-06-27 20:01:59,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 465 transitions, 5822 flow [2024-06-27 20:02:04,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 465 transitions, 5620 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-27 20:02:04,007 INFO L231 Difference]: Finished difference. Result has 379 places, 451 transitions, 4814 flow [2024-06-27 20:02:04,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4737, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4814, PETRI_PLACES=379, PETRI_TRANSITIONS=451} [2024-06-27 20:02:04,007 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 335 predicate places. [2024-06-27 20:02:04,007 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 451 transitions, 4814 flow [2024-06-27 20:02:04,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:02:04,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:04,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:04,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-27 20:02:04,007 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:02:04,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:04,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1531473572, now seen corresponding path program 2 times [2024-06-27 20:02:04,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:04,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806512265] [2024-06-27 20:02:04,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:04,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:04,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:05,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:05,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:05,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806512265] [2024-06-27 20:02:05,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806512265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:05,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:05,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:02:05,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266698448] [2024-06-27 20:02:05,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:05,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:02:05,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:05,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:02:05,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:02:05,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:02:05,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 451 transitions, 4814 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) [2024-06-27 20:02:05,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:05,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:02:05,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:07,476 INFO L124 PetriNetUnfolderBase]: 4418/7256 cut-off events. [2024-06-27 20:02:07,476 INFO L125 PetriNetUnfolderBase]: For 2074887/2074887 co-relation queries the response was YES. [2024-06-27 20:02:07,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76012 conditions, 7256 events. 4418/7256 cut-off events. For 2074887/2074887 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 47982 event pairs, 945 based on Foata normal form. 12/7264 useless extension candidates. Maximal degree in co-relation 75828. Up to 6048 conditions per place. [2024-06-27 20:02:07,617 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 388 selfloop transitions, 112 changer transitions 0/505 dead transitions. [2024-06-27 20:02:07,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 505 transitions, 6234 flow [2024-06-27 20:02:07,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:02:07,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:02:07,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 217 transitions. [2024-06-27 20:02:07,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4587737843551797 [2024-06-27 20:02:07,618 INFO L175 Difference]: Start difference. First operand has 379 places, 451 transitions, 4814 flow. Second operand 11 states and 217 transitions. [2024-06-27 20:02:07,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 505 transitions, 6234 flow [2024-06-27 20:02:11,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 505 transitions, 6162 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 20:02:11,863 INFO L231 Difference]: Finished difference. Result has 386 places, 462 transitions, 5214 flow [2024-06-27 20:02:11,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4742, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5214, PETRI_PLACES=386, PETRI_TRANSITIONS=462} [2024-06-27 20:02:11,863 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 342 predicate places. [2024-06-27 20:02:11,864 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 462 transitions, 5214 flow [2024-06-27 20:02:11,864 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) [2024-06-27 20:02:11,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:11,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:11,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-27 20:02:11,864 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:02:11,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:11,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1903841792, now seen corresponding path program 3 times [2024-06-27 20:02:11,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:11,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755640359] [2024-06-27 20:02:11,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:11,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:11,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:12,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:12,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:12,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755640359] [2024-06-27 20:02:12,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755640359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:12,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:12,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:02:12,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834320196] [2024-06-27 20:02:12,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:12,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:02:12,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:12,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:02:12,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:02:13,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:02:13,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 462 transitions, 5214 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) [2024-06-27 20:02:13,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:13,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:02:13,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:15,185 INFO L124 PetriNetUnfolderBase]: 4541/7499 cut-off events. [2024-06-27 20:02:15,186 INFO L125 PetriNetUnfolderBase]: For 2121081/2121081 co-relation queries the response was YES. [2024-06-27 20:02:15,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78763 conditions, 7499 events. 4541/7499 cut-off events. For 2121081/2121081 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 50339 event pairs, 990 based on Foata normal form. 12/7507 useless extension candidates. Maximal degree in co-relation 78576. Up to 6353 conditions per place. [2024-06-27 20:02:15,311 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 391 selfloop transitions, 117 changer transitions 0/513 dead transitions. [2024-06-27 20:02:15,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 513 transitions, 6626 flow [2024-06-27 20:02:15,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:02:15,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:02:15,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 216 transitions. [2024-06-27 20:02:15,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45665961945031713 [2024-06-27 20:02:15,312 INFO L175 Difference]: Start difference. First operand has 386 places, 462 transitions, 5214 flow. Second operand 11 states and 216 transitions. [2024-06-27 20:02:15,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 513 transitions, 6626 flow [2024-06-27 20:02:19,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 513 transitions, 6359 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-27 20:02:19,230 INFO L231 Difference]: Finished difference. Result has 393 places, 470 transitions, 5395 flow [2024-06-27 20:02:19,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4955, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5395, PETRI_PLACES=393, PETRI_TRANSITIONS=470} [2024-06-27 20:02:19,230 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 349 predicate places. [2024-06-27 20:02:19,230 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 470 transitions, 5395 flow [2024-06-27 20:02:19,230 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) [2024-06-27 20:02:19,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:19,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:19,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-27 20:02:19,230 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:02:19,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:19,231 INFO L85 PathProgramCache]: Analyzing trace with hash -219987554, now seen corresponding path program 4 times [2024-06-27 20:02:19,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:19,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227245905] [2024-06-27 20:02:19,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:19,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:19,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:20,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:20,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:20,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227245905] [2024-06-27 20:02:20,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227245905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:20,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:20,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:02:20,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006940564] [2024-06-27 20:02:20,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:20,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:02:20,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:20,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:02:20,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:02:20,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:02:20,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 470 transitions, 5395 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) [2024-06-27 20:02:20,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:20,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:02:20,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:22,827 INFO L124 PetriNetUnfolderBase]: 4651/7709 cut-off events. [2024-06-27 20:02:22,827 INFO L125 PetriNetUnfolderBase]: For 2159119/2159119 co-relation queries the response was YES. [2024-06-27 20:02:22,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80749 conditions, 7709 events. 4651/7709 cut-off events. For 2159119/2159119 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 52315 event pairs, 1020 based on Foata normal form. 12/7717 useless extension candidates. Maximal degree in co-relation 80559. Up to 6626 conditions per place. [2024-06-27 20:02:22,949 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 387 selfloop transitions, 126 changer transitions 0/518 dead transitions. [2024-06-27 20:02:22,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 518 transitions, 6781 flow [2024-06-27 20:02:22,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:02:22,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:02:22,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 215 transitions. [2024-06-27 20:02:22,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 20:02:22,950 INFO L175 Difference]: Start difference. First operand has 393 places, 470 transitions, 5395 flow. Second operand 11 states and 215 transitions. [2024-06-27 20:02:22,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 518 transitions, 6781 flow [2024-06-27 20:02:27,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 518 transitions, 6493 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-27 20:02:27,348 INFO L231 Difference]: Finished difference. Result has 400 places, 476 transitions, 5541 flow [2024-06-27 20:02:27,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5113, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5541, PETRI_PLACES=400, PETRI_TRANSITIONS=476} [2024-06-27 20:02:27,349 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 356 predicate places. [2024-06-27 20:02:27,349 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 476 transitions, 5541 flow [2024-06-27 20:02:27,349 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) [2024-06-27 20:02:27,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:27,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:27,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-27 20:02:27,349 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)] === [2024-06-27 20:02:27,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:27,349 INFO L85 PathProgramCache]: Analyzing trace with hash 28173824, now seen corresponding path program 5 times [2024-06-27 20:02:27,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:27,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378798257] [2024-06-27 20:02:27,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:27,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:27,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:28,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:28,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:28,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378798257] [2024-06-27 20:02:28,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378798257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:28,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:28,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:02:28,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151700419] [2024-06-27 20:02:28,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:28,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:02:28,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:28,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:02:28,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:02:28,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:02:28,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 476 transitions, 5541 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) [2024-06-27 20:02:28,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:28,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:02:28,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:30,916 INFO L124 PetriNetUnfolderBase]: 4733/7861 cut-off events. [2024-06-27 20:02:30,916 INFO L125 PetriNetUnfolderBase]: For 2194906/2194906 co-relation queries the response was YES. [2024-06-27 20:02:31,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82290 conditions, 7861 events. 4733/7861 cut-off events. For 2194906/2194906 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 53705 event pairs, 1045 based on Foata normal form. 12/7869 useless extension candidates. Maximal degree in co-relation 82097. Up to 6768 conditions per place. [2024-06-27 20:02:31,063 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 383 selfloop transitions, 134 changer transitions 0/522 dead transitions. [2024-06-27 20:02:31,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 522 transitions, 6921 flow [2024-06-27 20:02:31,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:02:31,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:02:31,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-27 20:02:31,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.452431289640592 [2024-06-27 20:02:31,064 INFO L175 Difference]: Start difference. First operand has 400 places, 476 transitions, 5541 flow. Second operand 11 states and 214 transitions. [2024-06-27 20:02:31,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 522 transitions, 6921 flow [2024-06-27 20:02:36,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 522 transitions, 6610 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-27 20:02:36,072 INFO L231 Difference]: Finished difference. Result has 406 places, 480 transitions, 5654 flow [2024-06-27 20:02:36,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5232, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5654, PETRI_PLACES=406, PETRI_TRANSITIONS=480} [2024-06-27 20:02:36,072 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 362 predicate places. [2024-06-27 20:02:36,073 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 480 transitions, 5654 flow [2024-06-27 20:02:36,073 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) [2024-06-27 20:02:36,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:36,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:36,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-27 20:02:36,073 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)] === [2024-06-27 20:02:36,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:36,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1889147278, now seen corresponding path program 6 times [2024-06-27 20:02:36,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:36,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494106113] [2024-06-27 20:02:36,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:36,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:36,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:37,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:37,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:37,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494106113] [2024-06-27 20:02:37,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494106113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:37,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:37,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:02:37,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416208685] [2024-06-27 20:02:37,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:37,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:02:37,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:37,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:02:37,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:02:37,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:02:37,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 480 transitions, 5654 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) [2024-06-27 20:02:37,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:37,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:02:37,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:39,489 INFO L124 PetriNetUnfolderBase]: 4713/7829 cut-off events. [2024-06-27 20:02:39,489 INFO L125 PetriNetUnfolderBase]: For 2147304/2147304 co-relation queries the response was YES. [2024-06-27 20:02:39,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80425 conditions, 7829 events. 4713/7829 cut-off events. For 2147304/2147304 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 53319 event pairs, 972 based on Foata normal form. 12/7837 useless extension candidates. Maximal degree in co-relation 80230. Up to 5358 conditions per place. [2024-06-27 20:02:39,625 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 362 selfloop transitions, 155 changer transitions 0/522 dead transitions. [2024-06-27 20:02:39,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 522 transitions, 6734 flow [2024-06-27 20:02:39,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:02:39,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:02:39,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 213 transitions. [2024-06-27 20:02:39,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4503171247357294 [2024-06-27 20:02:39,626 INFO L175 Difference]: Start difference. First operand has 406 places, 480 transitions, 5654 flow. Second operand 11 states and 213 transitions. [2024-06-27 20:02:39,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 522 transitions, 6734 flow [2024-06-27 20:02:44,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 522 transitions, 6444 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-27 20:02:44,099 INFO L231 Difference]: Finished difference. Result has 410 places, 479 transitions, 5516 flow [2024-06-27 20:02:44,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5202, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5516, PETRI_PLACES=410, PETRI_TRANSITIONS=479} [2024-06-27 20:02:44,100 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 366 predicate places. [2024-06-27 20:02:44,100 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 479 transitions, 5516 flow [2024-06-27 20:02:44,100 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) [2024-06-27 20:02:44,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:44,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:44,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-27 20:02:44,100 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:02:44,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:44,101 INFO L85 PathProgramCache]: Analyzing trace with hash -89531653, now seen corresponding path program 7 times [2024-06-27 20:02:44,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:44,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733333547] [2024-06-27 20:02:44,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:44,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:44,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:45,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:45,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:45,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733333547] [2024-06-27 20:02:45,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733333547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:45,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:45,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:02:45,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937704401] [2024-06-27 20:02:45,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:45,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:02:45,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:45,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:02:45,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:02:45,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:02:45,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 479 transitions, 5516 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:02:45,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:45,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:02:45,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:47,033 INFO L124 PetriNetUnfolderBase]: 4523/7590 cut-off events. [2024-06-27 20:02:47,033 INFO L125 PetriNetUnfolderBase]: For 2094824/2094832 co-relation queries the response was YES. [2024-06-27 20:02:47,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79530 conditions, 7590 events. 4523/7590 cut-off events. For 2094824/2094832 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 52644 event pairs, 989 based on Foata normal form. 7/7520 useless extension candidates. Maximal degree in co-relation 79334. Up to 6820 conditions per place. [2024-06-27 20:02:47,161 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 383 selfloop transitions, 81 changer transitions 0/509 dead transitions. [2024-06-27 20:02:47,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 509 transitions, 7422 flow [2024-06-27 20:02:47,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:02:47,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:02:47,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 20:02:47,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-27 20:02:47,162 INFO L175 Difference]: Start difference. First operand has 410 places, 479 transitions, 5516 flow. Second operand 8 states and 150 transitions. [2024-06-27 20:02:47,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 509 transitions, 7422 flow [2024-06-27 20:02:51,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 509 transitions, 6815 flow, removed 40 selfloop flow, removed 12 redundant places. [2024-06-27 20:02:51,826 INFO L231 Difference]: Finished difference. Result has 408 places, 495 transitions, 5512 flow [2024-06-27 20:02:51,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4909, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5512, PETRI_PLACES=408, PETRI_TRANSITIONS=495} [2024-06-27 20:02:51,827 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 364 predicate places. [2024-06-27 20:02:51,827 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 495 transitions, 5512 flow [2024-06-27 20:02:51,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:02:51,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:51,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:51,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-27 20:02:51,827 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:02:51,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:51,828 INFO L85 PathProgramCache]: Analyzing trace with hash 2080465529, now seen corresponding path program 8 times [2024-06-27 20:02:51,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:51,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660064558] [2024-06-27 20:02:51,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:51,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:51,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:52,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:52,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:52,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660064558] [2024-06-27 20:02:52,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660064558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:52,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:52,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:02:52,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107408085] [2024-06-27 20:02:52,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:52,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:02:52,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:52,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:02:52,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:02:52,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:02:52,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 495 transitions, 5512 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:02:52,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:52,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:02:52,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:54,734 INFO L124 PetriNetUnfolderBase]: 4532/7604 cut-off events. [2024-06-27 20:02:54,735 INFO L125 PetriNetUnfolderBase]: For 2123205/2123213 co-relation queries the response was YES. [2024-06-27 20:02:54,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78456 conditions, 7604 events. 4532/7604 cut-off events. For 2123205/2123213 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 52769 event pairs, 989 based on Foata normal form. 7/7534 useless extension candidates. Maximal degree in co-relation 78260. Up to 6835 conditions per place. [2024-06-27 20:02:54,866 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 383 selfloop transitions, 87 changer transitions 0/515 dead transitions. [2024-06-27 20:02:54,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 515 transitions, 7294 flow [2024-06-27 20:02:54,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:02:54,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:02:54,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 20:02:54,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-27 20:02:54,867 INFO L175 Difference]: Start difference. First operand has 408 places, 495 transitions, 5512 flow. Second operand 8 states and 150 transitions. [2024-06-27 20:02:54,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 515 transitions, 7294 flow [2024-06-27 20:03:00,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 515 transitions, 6988 flow, removed 114 selfloop flow, removed 5 redundant places. [2024-06-27 20:03:00,251 INFO L231 Difference]: Finished difference. Result has 412 places, 502 transitions, 5660 flow [2024-06-27 20:03:00,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5262, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5660, PETRI_PLACES=412, PETRI_TRANSITIONS=502} [2024-06-27 20:03:00,252 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 368 predicate places. [2024-06-27 20:03:00,252 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 502 transitions, 5660 flow [2024-06-27 20:03:00,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:03:00,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:00,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:00,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-27 20:03:00,252 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:00,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:00,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1794889995, now seen corresponding path program 10 times [2024-06-27 20:03:00,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:00,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974988572] [2024-06-27 20:03:00,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:00,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:00,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:01,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:01,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:01,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974988572] [2024-06-27 20:03:01,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974988572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:01,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:01,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:03:01,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911922562] [2024-06-27 20:03:01,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:01,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:03:01,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:01,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:03:01,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:03:01,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:03:01,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 502 transitions, 5660 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:03:01,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:01,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:03:01,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:03,032 INFO L124 PetriNetUnfolderBase]: 4537/7611 cut-off events. [2024-06-27 20:03:03,032 INFO L125 PetriNetUnfolderBase]: For 2136533/2136536 co-relation queries the response was YES. [2024-06-27 20:03:03,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77734 conditions, 7611 events. 4537/7611 cut-off events. For 2136533/2136536 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 52796 event pairs, 1008 based on Foata normal form. 3/7534 useless extension candidates. Maximal degree in co-relation 77537. Up to 6814 conditions per place. [2024-06-27 20:03:03,176 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 388 selfloop transitions, 87 changer transitions 0/520 dead transitions. [2024-06-27 20:03:03,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 520 transitions, 7244 flow [2024-06-27 20:03:03,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:03:03,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:03:03,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 20:03:03,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-27 20:03:03,177 INFO L175 Difference]: Start difference. First operand has 412 places, 502 transitions, 5660 flow. Second operand 8 states and 150 transitions. [2024-06-27 20:03:03,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 520 transitions, 7244 flow [2024-06-27 20:03:08,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 520 transitions, 7061 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-27 20:03:08,669 INFO L231 Difference]: Finished difference. Result has 416 places, 508 transitions, 5975 flow [2024-06-27 20:03:08,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5477, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5975, PETRI_PLACES=416, PETRI_TRANSITIONS=508} [2024-06-27 20:03:08,669 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 372 predicate places. [2024-06-27 20:03:08,670 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 508 transitions, 5975 flow [2024-06-27 20:03:08,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:03:08,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:08,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:08,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-27 20:03:08,670 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:08,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:08,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1795127331, now seen corresponding path program 10 times [2024-06-27 20:03:08,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:08,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872239323] [2024-06-27 20:03:08,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:08,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:08,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:09,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:09,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:09,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872239323] [2024-06-27 20:03:09,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872239323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:09,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:09,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:03:09,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2539301] [2024-06-27 20:03:09,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:09,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:03:09,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:09,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:03:09,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:03:09,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:03:09,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 508 transitions, 5975 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) [2024-06-27 20:03:09,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:09,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:03:09,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:11,529 INFO L124 PetriNetUnfolderBase]: 4749/7890 cut-off events. [2024-06-27 20:03:11,529 INFO L125 PetriNetUnfolderBase]: For 2177684/2177692 co-relation queries the response was YES. [2024-06-27 20:03:11,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79827 conditions, 7890 events. 4749/7890 cut-off events. For 2177684/2177692 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 54009 event pairs, 1059 based on Foata normal form. 7/7891 useless extension candidates. Maximal degree in co-relation 79629. Up to 7291 conditions per place. [2024-06-27 20:03:11,675 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 434 selfloop transitions, 87 changer transitions 0/526 dead transitions. [2024-06-27 20:03:11,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 526 transitions, 7629 flow [2024-06-27 20:03:11,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:03:11,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:03:11,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 20:03:11,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-27 20:03:11,676 INFO L175 Difference]: Start difference. First operand has 416 places, 508 transitions, 5975 flow. Second operand 8 states and 143 transitions. [2024-06-27 20:03:11,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 526 transitions, 7629 flow [2024-06-27 20:03:17,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 526 transitions, 7377 flow, removed 88 selfloop flow, removed 4 redundant places. [2024-06-27 20:03:17,116 INFO L231 Difference]: Finished difference. Result has 420 places, 514 transitions, 6197 flow [2024-06-27 20:03:17,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5727, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6197, PETRI_PLACES=420, PETRI_TRANSITIONS=514} [2024-06-27 20:03:17,117 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 376 predicate places. [2024-06-27 20:03:17,117 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 514 transitions, 6197 flow [2024-06-27 20:03:17,117 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) [2024-06-27 20:03:17,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:17,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:17,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-27 20:03:17,118 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:17,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:17,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1977806273, now seen corresponding path program 9 times [2024-06-27 20:03:17,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:17,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842955735] [2024-06-27 20:03:17,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:17,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:17,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:18,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:18,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:18,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842955735] [2024-06-27 20:03:18,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842955735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:18,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:18,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:03:18,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120990520] [2024-06-27 20:03:18,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:18,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:03:18,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:18,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:03:18,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:03:18,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:03:18,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 514 transitions, 6197 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:03:18,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:18,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:03:18,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:20,371 INFO L124 PetriNetUnfolderBase]: 4541/7618 cut-off events. [2024-06-27 20:03:20,371 INFO L125 PetriNetUnfolderBase]: For 2183274/2183282 co-relation queries the response was YES. [2024-06-27 20:03:20,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78303 conditions, 7618 events. 4541/7618 cut-off events. For 2183274/2183282 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 52816 event pairs, 991 based on Foata normal form. 7/7548 useless extension candidates. Maximal degree in co-relation 78103. Up to 6887 conditions per place. [2024-06-27 20:03:20,506 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 427 selfloop transitions, 54 changer transitions 0/528 dead transitions. [2024-06-27 20:03:20,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 528 transitions, 7514 flow [2024-06-27 20:03:20,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:03:20,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:03:20,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-27 20:03:20,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-27 20:03:20,507 INFO L175 Difference]: Start difference. First operand has 420 places, 514 transitions, 6197 flow. Second operand 8 states and 148 transitions. [2024-06-27 20:03:20,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 528 transitions, 7514 flow [2024-06-27 20:03:26,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 528 transitions, 7148 flow, removed 115 selfloop flow, removed 5 redundant places. [2024-06-27 20:03:26,588 INFO L231 Difference]: Finished difference. Result has 424 places, 516 transitions, 5990 flow [2024-06-27 20:03:26,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5835, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5990, PETRI_PLACES=424, PETRI_TRANSITIONS=516} [2024-06-27 20:03:26,588 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 380 predicate places. [2024-06-27 20:03:26,588 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 516 transitions, 5990 flow [2024-06-27 20:03:26,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:03:26,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:26,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:26,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-27 20:03:26,589 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:26,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:26,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1617638505, now seen corresponding path program 11 times [2024-06-27 20:03:26,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:26,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788853243] [2024-06-27 20:03:26,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:26,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:26,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:27,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:27,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:27,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788853243] [2024-06-27 20:03:27,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788853243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:27,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:27,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:03:27,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292603468] [2024-06-27 20:03:27,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:27,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:03:27,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:27,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:03:27,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:03:27,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:03:27,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 516 transitions, 5990 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:03:27,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:27,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:03:27,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:29,473 INFO L124 PetriNetUnfolderBase]: 4546/7621 cut-off events. [2024-06-27 20:03:29,473 INFO L125 PetriNetUnfolderBase]: For 2206158/2206158 co-relation queries the response was YES. [2024-06-27 20:03:29,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78172 conditions, 7621 events. 4546/7621 cut-off events. For 2206158/2206158 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 52807 event pairs, 986 based on Foata normal form. 1/7546 useless extension candidates. Maximal degree in co-relation 77970. Up to 6933 conditions per place. [2024-06-27 20:03:29,612 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 454 selfloop transitions, 29 changer transitions 0/530 dead transitions. [2024-06-27 20:03:29,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 530 transitions, 7128 flow [2024-06-27 20:03:29,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:03:29,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:03:29,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 20:03:29,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-27 20:03:29,613 INFO L175 Difference]: Start difference. First operand has 424 places, 516 transitions, 5990 flow. Second operand 8 states and 145 transitions. [2024-06-27 20:03:29,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 530 transitions, 7128 flow [2024-06-27 20:03:36,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 530 transitions, 7020 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 20:03:36,077 INFO L231 Difference]: Finished difference. Result has 427 places, 519 transitions, 6098 flow [2024-06-27 20:03:36,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5882, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6098, PETRI_PLACES=427, PETRI_TRANSITIONS=519} [2024-06-27 20:03:36,077 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 383 predicate places. [2024-06-27 20:03:36,077 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 519 transitions, 6098 flow [2024-06-27 20:03:36,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:03:36,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:36,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:36,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-27 20:03:36,078 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:36,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:36,078 INFO L85 PathProgramCache]: Analyzing trace with hash -369392833, now seen corresponding path program 10 times [2024-06-27 20:03:36,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:36,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613471363] [2024-06-27 20:03:36,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:36,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:36,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:37,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:37,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:37,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613471363] [2024-06-27 20:03:37,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613471363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:37,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:37,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:03:37,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806862057] [2024-06-27 20:03:37,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:37,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:03:37,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:37,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:03:37,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:03:37,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:03:37,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 519 transitions, 6098 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:03:37,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:37,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:03:37,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:39,055 INFO L124 PetriNetUnfolderBase]: 4551/7634 cut-off events. [2024-06-27 20:03:39,055 INFO L125 PetriNetUnfolderBase]: For 2234489/2234497 co-relation queries the response was YES. [2024-06-27 20:03:39,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78413 conditions, 7634 events. 4551/7634 cut-off events. For 2234489/2234497 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 52982 event pairs, 991 based on Foata normal form. 7/7564 useless extension candidates. Maximal degree in co-relation 78210. Up to 6913 conditions per place. [2024-06-27 20:03:39,190 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 439 selfloop transitions, 47 changer transitions 0/533 dead transitions. [2024-06-27 20:03:39,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 533 transitions, 7187 flow [2024-06-27 20:03:39,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:03:39,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:03:39,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 20:03:39,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-27 20:03:39,191 INFO L175 Difference]: Start difference. First operand has 427 places, 519 transitions, 6098 flow. Second operand 8 states and 146 transitions. [2024-06-27 20:03:39,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 533 transitions, 7187 flow [2024-06-27 20:03:45,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 533 transitions, 6999 flow, removed 67 selfloop flow, removed 6 redundant places. [2024-06-27 20:03:45,602 INFO L231 Difference]: Finished difference. Result has 429 places, 522 transitions, 6107 flow [2024-06-27 20:03:45,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5910, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6107, PETRI_PLACES=429, PETRI_TRANSITIONS=522} [2024-06-27 20:03:45,602 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 385 predicate places. [2024-06-27 20:03:45,602 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 522 transitions, 6107 flow [2024-06-27 20:03:45,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:03:45,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:45,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:45,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-27 20:03:45,603 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:45,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:45,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1794890181, now seen corresponding path program 11 times [2024-06-27 20:03:45,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:45,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389392434] [2024-06-27 20:03:45,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:45,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:45,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:46,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:46,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:46,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389392434] [2024-06-27 20:03:46,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389392434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:46,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:46,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:03:46,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089281064] [2024-06-27 20:03:46,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:46,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:03:46,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:46,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:03:46,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:03:46,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:03:46,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 522 transitions, 6107 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) [2024-06-27 20:03:46,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:46,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:03:46,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:48,620 INFO L124 PetriNetUnfolderBase]: 4761/7907 cut-off events. [2024-06-27 20:03:48,621 INFO L125 PetriNetUnfolderBase]: For 2266535/2266543 co-relation queries the response was YES. [2024-06-27 20:03:48,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80021 conditions, 7907 events. 4761/7907 cut-off events. For 2266535/2266543 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 54086 event pairs, 1057 based on Foata normal form. 7/7908 useless extension candidates. Maximal degree in co-relation 79817. Up to 7307 conditions per place. [2024-06-27 20:03:48,745 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 444 selfloop transitions, 88 changer transitions 0/537 dead transitions. [2024-06-27 20:03:48,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 537 transitions, 7627 flow [2024-06-27 20:03:48,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:03:48,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:03:48,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 20:03:48,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-27 20:03:48,746 INFO L175 Difference]: Start difference. First operand has 429 places, 522 transitions, 6107 flow. Second operand 8 states and 144 transitions. [2024-06-27 20:03:48,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 537 transitions, 7627 flow [2024-06-27 20:03:53,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 537 transitions, 7473 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-27 20:03:53,724 INFO L231 Difference]: Finished difference. Result has 431 places, 525 transitions, 6259 flow [2024-06-27 20:03:53,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5953, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6259, PETRI_PLACES=431, PETRI_TRANSITIONS=525} [2024-06-27 20:03:53,724 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 387 predicate places. [2024-06-27 20:03:53,724 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 525 transitions, 6259 flow [2024-06-27 20:03:53,724 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) [2024-06-27 20:03:53,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:53,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:53,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-27 20:03:53,725 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:53,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:53,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1830663407, now seen corresponding path program 11 times [2024-06-27 20:03:53,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:53,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373871395] [2024-06-27 20:03:53,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:53,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:53,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:54,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:54,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:54,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373871395] [2024-06-27 20:03:54,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373871395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:54,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:54,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:03:54,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345981278] [2024-06-27 20:03:54,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:54,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:03:54,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:54,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:03:54,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:03:54,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:03:54,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 525 transitions, 6259 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:03:54,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:54,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:03:54,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:56,670 INFO L124 PetriNetUnfolderBase]: 4553/7637 cut-off events. [2024-06-27 20:03:56,670 INFO L125 PetriNetUnfolderBase]: For 2278725/2278733 co-relation queries the response was YES. [2024-06-27 20:03:56,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78691 conditions, 7637 events. 4553/7637 cut-off events. For 2278725/2278733 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 52905 event pairs, 991 based on Foata normal form. 7/7567 useless extension candidates. Maximal degree in co-relation 78486. Up to 6901 conditions per place. [2024-06-27 20:03:56,814 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 433 selfloop transitions, 58 changer transitions 0/539 dead transitions. [2024-06-27 20:03:56,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 539 transitions, 7637 flow [2024-06-27 20:03:56,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:03:56,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:03:56,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-27 20:03:56,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-27 20:03:56,815 INFO L175 Difference]: Start difference. First operand has 431 places, 525 transitions, 6259 flow. Second operand 8 states and 148 transitions. [2024-06-27 20:03:56,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 539 transitions, 7637 flow [2024-06-27 20:04:04,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 539 transitions, 7295 flow, removed 94 selfloop flow, removed 5 redundant places. [2024-06-27 20:04:04,057 INFO L231 Difference]: Finished difference. Result has 435 places, 527 transitions, 6121 flow [2024-06-27 20:04:04,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5937, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6121, PETRI_PLACES=435, PETRI_TRANSITIONS=527} [2024-06-27 20:04:04,057 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 391 predicate places. [2024-06-27 20:04:04,057 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 527 transitions, 6121 flow [2024-06-27 20:04:04,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:04:04,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:04,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:04,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-27 20:04:04,058 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:04:04,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:04,058 INFO L85 PathProgramCache]: Analyzing trace with hash -546524787, now seen corresponding path program 12 times [2024-06-27 20:04:04,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:04,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037201786] [2024-06-27 20:04:04,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:04,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:04,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:04,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:04,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:04,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037201786] [2024-06-27 20:04:04,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037201786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:04,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:04,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:04:04,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739229976] [2024-06-27 20:04:04,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:04,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:04:04,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:04,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:04:04,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:04:04,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:04:04,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 527 transitions, 6121 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:04:04,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:04,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:04:04,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:06,857 INFO L124 PetriNetUnfolderBase]: 4552/7635 cut-off events. [2024-06-27 20:04:06,857 INFO L125 PetriNetUnfolderBase]: For 2293410/2293413 co-relation queries the response was YES. [2024-06-27 20:04:06,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78440 conditions, 7635 events. 4552/7635 cut-off events. For 2293410/2293413 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 52951 event pairs, 1010 based on Foata normal form. 3/7558 useless extension candidates. Maximal degree in co-relation 78233. Up to 6826 conditions per place. [2024-06-27 20:04:06,991 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 402 selfloop transitions, 88 changer transitions 0/538 dead transitions. [2024-06-27 20:04:06,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 538 transitions, 7127 flow [2024-06-27 20:04:06,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:04:06,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:04:06,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 20:04:06,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-27 20:04:06,992 INFO L175 Difference]: Start difference. First operand has 435 places, 527 transitions, 6121 flow. Second operand 8 states and 150 transitions. [2024-06-27 20:04:06,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 538 transitions, 7127 flow [2024-06-27 20:04:13,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 538 transitions, 6909 flow, removed 61 selfloop flow, removed 5 redundant places. [2024-06-27 20:04:13,815 INFO L231 Difference]: Finished difference. Result has 438 places, 527 transitions, 6085 flow [2024-06-27 20:04:13,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5903, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6085, PETRI_PLACES=438, PETRI_TRANSITIONS=527} [2024-06-27 20:04:13,815 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 394 predicate places. [2024-06-27 20:04:13,815 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 527 transitions, 6085 flow [2024-06-27 20:04:13,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:04:13,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:13,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:13,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-27 20:04:13,816 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:04:13,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:13,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1617758661, now seen corresponding path program 12 times [2024-06-27 20:04:13,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:13,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094342997] [2024-06-27 20:04:13,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:13,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:13,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:14,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:14,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:14,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094342997] [2024-06-27 20:04:14,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094342997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:14,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:14,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:04:14,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048434303] [2024-06-27 20:04:14,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:14,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:04:14,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:14,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:04:14,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:04:14,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:04:14,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 527 transitions, 6085 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) [2024-06-27 20:04:14,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:14,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:04:14,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:16,673 INFO L124 PetriNetUnfolderBase]: 4752/7895 cut-off events. [2024-06-27 20:04:16,673 INFO L125 PetriNetUnfolderBase]: For 2312258/2312266 co-relation queries the response was YES. [2024-06-27 20:04:16,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79718 conditions, 7895 events. 4752/7895 cut-off events. For 2312258/2312266 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 54022 event pairs, 1057 based on Foata normal form. 7/7896 useless extension candidates. Maximal degree in co-relation 79510. Up to 7296 conditions per place. [2024-06-27 20:04:16,823 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 443 selfloop transitions, 90 changer transitions 0/538 dead transitions. [2024-06-27 20:04:16,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 538 transitions, 7177 flow [2024-06-27 20:04:16,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:04:16,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:04:16,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 20:04:16,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-27 20:04:16,824 INFO L175 Difference]: Start difference. First operand has 438 places, 527 transitions, 6085 flow. Second operand 8 states and 142 transitions. [2024-06-27 20:04:16,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 538 transitions, 7177 flow [2024-06-27 20:04:24,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 538 transitions, 6791 flow, removed 69 selfloop flow, removed 8 redundant places. [2024-06-27 20:04:24,260 INFO L231 Difference]: Finished difference. Result has 438 places, 527 transitions, 5885 flow [2024-06-27 20:04:24,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5699, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5885, PETRI_PLACES=438, PETRI_TRANSITIONS=527} [2024-06-27 20:04:24,260 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 394 predicate places. [2024-06-27 20:04:24,260 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 527 transitions, 5885 flow [2024-06-27 20:04:24,260 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) [2024-06-27 20:04:24,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:24,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:24,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-27 20:04:24,261 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:04:24,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:24,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1978102943, now seen corresponding path program 12 times [2024-06-27 20:04:24,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:24,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529826125] [2024-06-27 20:04:24,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:24,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:24,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:25,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:25,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:25,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529826125] [2024-06-27 20:04:25,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529826125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:25,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:25,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:04:25,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623199754] [2024-06-27 20:04:25,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:25,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:04:25,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:25,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:04:25,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:04:25,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:04:25,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 527 transitions, 5885 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:04:25,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:25,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:04:25,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:27,549 INFO L124 PetriNetUnfolderBase]: 4546/7629 cut-off events. [2024-06-27 20:04:27,549 INFO L125 PetriNetUnfolderBase]: For 2322825/2322833 co-relation queries the response was YES. [2024-06-27 20:04:27,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78081 conditions, 7629 events. 4546/7629 cut-off events. For 2322825/2322833 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 52957 event pairs, 991 based on Foata normal form. 7/7559 useless extension candidates. Maximal degree in co-relation 77873. Up to 6903 conditions per place. [2024-06-27 20:04:27,675 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 443 selfloop transitions, 47 changer transitions 0/538 dead transitions. [2024-06-27 20:04:27,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 538 transitions, 6891 flow [2024-06-27 20:04:27,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:04:27,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:04:27,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 20:04:27,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-27 20:04:27,676 INFO L175 Difference]: Start difference. First operand has 438 places, 527 transitions, 5885 flow. Second operand 8 states and 146 transitions. [2024-06-27 20:04:27,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 538 transitions, 6891 flow [2024-06-27 20:04:33,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 538 transitions, 6543 flow, removed 49 selfloop flow, removed 9 redundant places. [2024-06-27 20:04:33,270 INFO L231 Difference]: Finished difference. Result has 437 places, 527 transitions, 5637 flow [2024-06-27 20:04:33,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5537, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5637, PETRI_PLACES=437, PETRI_TRANSITIONS=527} [2024-06-27 20:04:33,271 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 393 predicate places. [2024-06-27 20:04:33,271 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 527 transitions, 5637 flow [2024-06-27 20:04:33,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:04:33,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:33,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:33,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-27 20:04:33,272 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:04:33,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:33,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1963928131, now seen corresponding path program 1 times [2024-06-27 20:04:33,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:33,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618534733] [2024-06-27 20:04:33,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:33,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:33,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:34,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:34,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:34,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618534733] [2024-06-27 20:04:34,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618534733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:34,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:34,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:04:34,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778149072] [2024-06-27 20:04:34,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:34,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:04:34,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:34,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:04:34,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:04:35,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 20:04:35,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 527 transitions, 5637 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:35,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:35,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 20:04:35,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:36,990 INFO L124 PetriNetUnfolderBase]: 4330/7358 cut-off events. [2024-06-27 20:04:36,991 INFO L125 PetriNetUnfolderBase]: For 2351574/2351596 co-relation queries the response was YES. [2024-06-27 20:04:37,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75922 conditions, 7358 events. 4330/7358 cut-off events. For 2351574/2351596 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 51787 event pairs, 938 based on Foata normal form. 5/7253 useless extension candidates. Maximal degree in co-relation 75714. Up to 6480 conditions per place. [2024-06-27 20:04:37,139 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 417 selfloop transitions, 20 changer transitions 0/542 dead transitions. [2024-06-27 20:04:37,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 542 transitions, 6603 flow [2024-06-27 20:04:37,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:04:37,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:04:37,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 20:04:37,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-27 20:04:37,140 INFO L175 Difference]: Start difference. First operand has 437 places, 527 transitions, 5637 flow. Second operand 9 states and 164 transitions. [2024-06-27 20:04:37,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 542 transitions, 6603 flow [2024-06-27 20:04:43,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 542 transitions, 6507 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 20:04:43,399 INFO L231 Difference]: Finished difference. Result has 440 places, 530 transitions, 5657 flow [2024-06-27 20:04:43,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5541, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5657, PETRI_PLACES=440, PETRI_TRANSITIONS=530} [2024-06-27 20:04:43,400 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 396 predicate places. [2024-06-27 20:04:43,400 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 530 transitions, 5657 flow [2024-06-27 20:04:43,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:43,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:43,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:43,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-27 20:04:43,400 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:04:43,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:43,400 INFO L85 PathProgramCache]: Analyzing trace with hash 2075239611, now seen corresponding path program 2 times [2024-06-27 20:04:43,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:43,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028950470] [2024-06-27 20:04:43,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:43,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:43,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:44,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:44,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:44,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028950470] [2024-06-27 20:04:44,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028950470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:44,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:44,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:04:44,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045506387] [2024-06-27 20:04:44,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:44,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:04:44,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:44,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:04:44,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:04:44,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 20:04:44,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 530 transitions, 5657 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:44,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:44,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 20:04:44,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:46,989 INFO L124 PetriNetUnfolderBase]: 4324/7350 cut-off events. [2024-06-27 20:04:46,990 INFO L125 PetriNetUnfolderBase]: For 2355494/2355502 co-relation queries the response was YES. [2024-06-27 20:04:47,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75659 conditions, 7350 events. 4324/7350 cut-off events. For 2355494/2355502 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 51764 event pairs, 937 based on Foata normal form. 10/7250 useless extension candidates. Maximal degree in co-relation 75450. Up to 6467 conditions per place. [2024-06-27 20:04:47,121 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 412 selfloop transitions, 26 changer transitions 0/543 dead transitions. [2024-06-27 20:04:47,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 543 transitions, 6563 flow [2024-06-27 20:04:47,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:04:47,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:04:47,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-27 20:04:47,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-27 20:04:47,122 INFO L175 Difference]: Start difference. First operand has 440 places, 530 transitions, 5657 flow. Second operand 10 states and 180 transitions. [2024-06-27 20:04:47,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 543 transitions, 6563 flow [2024-06-27 20:04:54,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 543 transitions, 6431 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-27 20:04:54,152 INFO L231 Difference]: Finished difference. Result has 443 places, 530 transitions, 5587 flow [2024-06-27 20:04:54,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5525, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5587, PETRI_PLACES=443, PETRI_TRANSITIONS=530} [2024-06-27 20:04:54,153 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 399 predicate places. [2024-06-27 20:04:54,153 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 530 transitions, 5587 flow [2024-06-27 20:04:54,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:54,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:54,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:54,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-27 20:04:54,153 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:04:54,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:54,154 INFO L85 PathProgramCache]: Analyzing trace with hash -2008336799, now seen corresponding path program 1 times [2024-06-27 20:04:54,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:54,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485420894] [2024-06-27 20:04:54,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:54,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:54,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:54,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:54,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:54,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485420894] [2024-06-27 20:04:54,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485420894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:54,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:54,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:04:54,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404365548] [2024-06-27 20:04:54,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:54,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:04:54,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:54,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:04:54,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:04:55,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:04:55,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 530 transitions, 5587 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:55,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:55,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:04:55,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:57,254 INFO L124 PetriNetUnfolderBase]: 4631/7772 cut-off events. [2024-06-27 20:04:57,254 INFO L125 PetriNetUnfolderBase]: For 2371308/2371308 co-relation queries the response was YES. [2024-06-27 20:04:57,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77893 conditions, 7772 events. 4631/7772 cut-off events. For 2371308/2371308 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 53802 event pairs, 988 based on Foata normal form. 1/7772 useless extension candidates. Maximal degree in co-relation 77683. Up to 7149 conditions per place. [2024-06-27 20:04:57,381 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 509 selfloop transitions, 20 changer transitions 0/557 dead transitions. [2024-06-27 20:04:57,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 557 transitions, 6831 flow [2024-06-27 20:04:57,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:04:57,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:04:57,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 20:04:57,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-27 20:04:57,382 INFO L175 Difference]: Start difference. First operand has 443 places, 530 transitions, 5587 flow. Second operand 9 states and 168 transitions. [2024-06-27 20:04:57,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 557 transitions, 6831 flow [2024-06-27 20:05:04,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 557 transitions, 6751 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-27 20:05:04,668 INFO L231 Difference]: Finished difference. Result has 442 places, 533 transitions, 5685 flow [2024-06-27 20:05:04,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5507, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5685, PETRI_PLACES=442, PETRI_TRANSITIONS=533} [2024-06-27 20:05:04,668 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 398 predicate places. [2024-06-27 20:05:04,668 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 533 transitions, 5685 flow [2024-06-27 20:05:04,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:04,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:04,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:05:04,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-27 20:05:04,669 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:05:04,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:04,669 INFO L85 PathProgramCache]: Analyzing trace with hash 262842875, now seen corresponding path program 1 times [2024-06-27 20:05:04,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:04,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354311565] [2024-06-27 20:05:04,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:04,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:04,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:05,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:05:05,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:05,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354311565] [2024-06-27 20:05:05,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354311565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:05,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:05,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:05:05,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493131934] [2024-06-27 20:05:05,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:05,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:05:05,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:05,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:05:05,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:05:05,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:05:05,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 533 transitions, 5685 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:05,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:05,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:05:05,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:07,737 INFO L124 PetriNetUnfolderBase]: 4655/7804 cut-off events. [2024-06-27 20:05:07,737 INFO L125 PetriNetUnfolderBase]: For 2456754/2456755 co-relation queries the response was YES. [2024-06-27 20:05:07,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78956 conditions, 7804 events. 4655/7804 cut-off events. For 2456754/2456755 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 53992 event pairs, 985 based on Foata normal form. 6/7807 useless extension candidates. Maximal degree in co-relation 78746. Up to 7177 conditions per place. [2024-06-27 20:05:07,883 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 511 selfloop transitions, 21 changer transitions 0/560 dead transitions. [2024-06-27 20:05:07,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 560 transitions, 6919 flow [2024-06-27 20:05:07,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:05:07,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:05:07,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 20:05:07,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-27 20:05:07,884 INFO L175 Difference]: Start difference. First operand has 442 places, 533 transitions, 5685 flow. Second operand 9 states and 168 transitions. [2024-06-27 20:05:07,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 560 transitions, 6919 flow [2024-06-27 20:05:15,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 560 transitions, 6763 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-06-27 20:05:15,222 INFO L231 Difference]: Finished difference. Result has 444 places, 537 transitions, 5682 flow [2024-06-27 20:05:15,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5529, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5682, PETRI_PLACES=444, PETRI_TRANSITIONS=537} [2024-06-27 20:05:15,223 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 400 predicate places. [2024-06-27 20:05:15,223 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 537 transitions, 5682 flow [2024-06-27 20:05:15,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:15,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:15,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:05:15,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-27 20:05:15,223 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:05:15,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:15,224 INFO L85 PathProgramCache]: Analyzing trace with hash -2003568503, now seen corresponding path program 2 times [2024-06-27 20:05:15,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:15,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520167404] [2024-06-27 20:05:15,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:15,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:15,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:16,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:05:16,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:16,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520167404] [2024-06-27 20:05:16,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520167404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:16,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:16,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:05:16,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909596983] [2024-06-27 20:05:16,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:16,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:05:16,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:16,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:05:16,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:05:16,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:05:16,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 537 transitions, 5682 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:16,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:16,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:05:16,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:18,343 INFO L124 PetriNetUnfolderBase]: 4702/7873 cut-off events. [2024-06-27 20:05:18,344 INFO L125 PetriNetUnfolderBase]: For 2519476/2519477 co-relation queries the response was YES. [2024-06-27 20:05:18,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81531 conditions, 7873 events. 4702/7873 cut-off events. For 2519476/2519477 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 54425 event pairs, 988 based on Foata normal form. 4/7876 useless extension candidates. Maximal degree in co-relation 81320. Up to 7197 conditions per place. [2024-06-27 20:05:18,485 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 503 selfloop transitions, 35 changer transitions 0/566 dead transitions. [2024-06-27 20:05:18,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 566 transitions, 7344 flow [2024-06-27 20:05:18,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:05:18,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:05:18,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 20:05:18,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-27 20:05:18,486 INFO L175 Difference]: Start difference. First operand has 444 places, 537 transitions, 5682 flow. Second operand 9 states and 170 transitions. [2024-06-27 20:05:18,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 566 transitions, 7344 flow [2024-06-27 20:05:26,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 566 transitions, 7223 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-27 20:05:26,982 INFO L231 Difference]: Finished difference. Result has 447 places, 544 transitions, 5847 flow [2024-06-27 20:05:26,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5561, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5847, PETRI_PLACES=447, PETRI_TRANSITIONS=544} [2024-06-27 20:05:26,982 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 403 predicate places. [2024-06-27 20:05:26,982 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 544 transitions, 5847 flow [2024-06-27 20:05:26,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:26,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:26,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:05:26,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-27 20:05:26,983 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:05:26,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:26,983 INFO L85 PathProgramCache]: Analyzing trace with hash -2003575013, now seen corresponding path program 3 times [2024-06-27 20:05:26,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:26,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257957800] [2024-06-27 20:05:26,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:26,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:26,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:27,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:05:27,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:27,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257957800] [2024-06-27 20:05:27,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257957800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:27,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:27,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:05:27,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596683172] [2024-06-27 20:05:27,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:27,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:05:27,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:27,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:05:27,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:05:27,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:05:27,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 544 transitions, 5847 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:27,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:27,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:05:27,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:30,232 INFO L124 PetriNetUnfolderBase]: 4684/7849 cut-off events. [2024-06-27 20:05:30,232 INFO L125 PetriNetUnfolderBase]: For 2530386/2530388 co-relation queries the response was YES. [2024-06-27 20:05:30,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81470 conditions, 7849 events. 4684/7849 cut-off events. For 2530386/2530388 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 54304 event pairs, 986 based on Foata normal form. 7/7853 useless extension candidates. Maximal degree in co-relation 81257. Up to 7209 conditions per place. [2024-06-27 20:05:30,363 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 511 selfloop transitions, 26 changer transitions 0/565 dead transitions. [2024-06-27 20:05:30,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 565 transitions, 7011 flow [2024-06-27 20:05:30,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:05:30,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:05:30,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 20:05:30,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-27 20:05:30,364 INFO L175 Difference]: Start difference. First operand has 447 places, 544 transitions, 5847 flow. Second operand 9 states and 168 transitions. [2024-06-27 20:05:30,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 565 transitions, 7011 flow [2024-06-27 20:05:38,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 565 transitions, 6837 flow, removed 74 selfloop flow, removed 5 redundant places. [2024-06-27 20:05:38,390 INFO L231 Difference]: Finished difference. Result has 451 places, 544 transitions, 5732 flow [2024-06-27 20:05:38,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5673, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5732, PETRI_PLACES=451, PETRI_TRANSITIONS=544} [2024-06-27 20:05:38,391 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 407 predicate places. [2024-06-27 20:05:38,391 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 544 transitions, 5732 flow [2024-06-27 20:05:38,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:38,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:38,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:05:38,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-27 20:05:38,391 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:05:38,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:38,392 INFO L85 PathProgramCache]: Analyzing trace with hash 977352489, now seen corresponding path program 1 times [2024-06-27 20:05:38,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:38,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756682385] [2024-06-27 20:05:38,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:38,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:38,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:39,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:05:39,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:39,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756682385] [2024-06-27 20:05:39,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756682385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:39,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:39,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:05:39,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521904755] [2024-06-27 20:05:39,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:39,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:05:39,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:39,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:05:39,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:05:40,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:05:40,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 544 transitions, 5732 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:40,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:40,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:05:40,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:42,054 INFO L124 PetriNetUnfolderBase]: 4607/7708 cut-off events. [2024-06-27 20:05:42,054 INFO L125 PetriNetUnfolderBase]: For 2481799/2481815 co-relation queries the response was YES. [2024-06-27 20:05:42,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80882 conditions, 7708 events. 4607/7708 cut-off events. For 2481799/2481815 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 53403 event pairs, 965 based on Foata normal form. 17/7652 useless extension candidates. Maximal degree in co-relation 80667. Up to 7049 conditions per place. [2024-06-27 20:05:42,213 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 491 selfloop transitions, 20 changer transitions 0/559 dead transitions. [2024-06-27 20:05:42,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 559 transitions, 6790 flow [2024-06-27 20:05:42,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:05:42,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:05:42,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 20:05:42,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-27 20:05:42,214 INFO L175 Difference]: Start difference. First operand has 451 places, 544 transitions, 5732 flow. Second operand 9 states and 159 transitions. [2024-06-27 20:05:42,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 559 transitions, 6790 flow [2024-06-27 20:05:48,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 559 transitions, 6713 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-27 20:05:48,823 INFO L231 Difference]: Finished difference. Result has 452 places, 544 transitions, 5701 flow [2024-06-27 20:05:48,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5655, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5701, PETRI_PLACES=452, PETRI_TRANSITIONS=544} [2024-06-27 20:05:48,824 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 408 predicate places. [2024-06-27 20:05:48,824 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 544 transitions, 5701 flow [2024-06-27 20:05:48,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:48,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:48,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:05:48,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-27 20:05:48,824 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:05:48,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:48,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1830847973, now seen corresponding path program 4 times [2024-06-27 20:05:48,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:48,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309151131] [2024-06-27 20:05:48,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:48,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:48,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:49,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:05:49,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:49,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309151131] [2024-06-27 20:05:49,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309151131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:49,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:49,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:05:49,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654802149] [2024-06-27 20:05:49,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:49,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:05:49,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:49,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:05:49,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:05:49,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:05:49,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 544 transitions, 5701 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:49,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:49,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:05:49,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:52,055 INFO L124 PetriNetUnfolderBase]: 4723/7908 cut-off events. [2024-06-27 20:05:52,055 INFO L125 PetriNetUnfolderBase]: For 2627349/2627355 co-relation queries the response was YES. [2024-06-27 20:05:52,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83253 conditions, 7908 events. 4723/7908 cut-off events. For 2627349/2627355 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 54694 event pairs, 990 based on Foata normal form. 3/7907 useless extension candidates. Maximal degree in co-relation 83037. Up to 7168 conditions per place. [2024-06-27 20:05:52,190 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 483 selfloop transitions, 60 changer transitions 0/571 dead transitions. [2024-06-27 20:05:52,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 571 transitions, 7403 flow [2024-06-27 20:05:52,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:05:52,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:05:52,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 20:05:52,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 20:05:52,191 INFO L175 Difference]: Start difference. First operand has 452 places, 544 transitions, 5701 flow. Second operand 9 states and 171 transitions. [2024-06-27 20:05:52,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 571 transitions, 7403 flow [2024-06-27 20:05:58,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 571 transitions, 7283 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-27 20:05:58,215 INFO L231 Difference]: Finished difference. Result has 454 places, 551 transitions, 5954 flow [2024-06-27 20:05:58,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5581, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5954, PETRI_PLACES=454, PETRI_TRANSITIONS=551} [2024-06-27 20:05:58,215 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 410 predicate places. [2024-06-27 20:05:58,215 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 551 transitions, 5954 flow [2024-06-27 20:05:58,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:58,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:58,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:05:58,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-27 20:05:58,216 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:05:58,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:58,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1861412069, now seen corresponding path program 5 times [2024-06-27 20:05:58,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:58,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816860307] [2024-06-27 20:05:58,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:58,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:58,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:59,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:05:59,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:59,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816860307] [2024-06-27 20:05:59,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816860307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:59,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:59,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:05:59,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763739371] [2024-06-27 20:05:59,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:59,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:05:59,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:59,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:05:59,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:05:59,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:05:59,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 551 transitions, 5954 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:59,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:59,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:05:59,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:01,263 INFO L124 PetriNetUnfolderBase]: 4730/7918 cut-off events. [2024-06-27 20:06:01,263 INFO L125 PetriNetUnfolderBase]: For 2671658/2671664 co-relation queries the response was YES. [2024-06-27 20:06:01,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84390 conditions, 7918 events. 4730/7918 cut-off events. For 2671658/2671664 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 54805 event pairs, 990 based on Foata normal form. 7/7920 useless extension candidates. Maximal degree in co-relation 84173. Up to 7261 conditions per place. [2024-06-27 20:06:01,413 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 511 selfloop transitions, 33 changer transitions 0/572 dead transitions. [2024-06-27 20:06:01,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 572 transitions, 7231 flow [2024-06-27 20:06:01,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:06:01,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:06:01,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-27 20:06:01,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-27 20:06:01,414 INFO L175 Difference]: Start difference. First operand has 454 places, 551 transitions, 5954 flow. Second operand 9 states and 167 transitions. [2024-06-27 20:06:01,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 572 transitions, 7231 flow [2024-06-27 20:06:08,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 572 transitions, 7081 flow, removed 56 selfloop flow, removed 5 redundant places. [2024-06-27 20:06:08,024 INFO L231 Difference]: Finished difference. Result has 458 places, 554 transitions, 5982 flow [2024-06-27 20:06:08,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5816, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5982, PETRI_PLACES=458, PETRI_TRANSITIONS=554} [2024-06-27 20:06:08,025 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 414 predicate places. [2024-06-27 20:06:08,025 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 554 transitions, 5982 flow [2024-06-27 20:06:08,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:08,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:08,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:08,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-27 20:06:08,025 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:06:08,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:08,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1831078613, now seen corresponding path program 6 times [2024-06-27 20:06:08,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:08,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458042334] [2024-06-27 20:06:08,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:08,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:08,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:09,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:09,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:09,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458042334] [2024-06-27 20:06:09,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458042334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:09,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:09,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:06:09,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138969685] [2024-06-27 20:06:09,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:09,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:06:09,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:09,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:06:09,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:06:09,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:06:09,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 554 transitions, 5982 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:09,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:09,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:06:09,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:11,368 INFO L124 PetriNetUnfolderBase]: 4726/7912 cut-off events. [2024-06-27 20:06:11,368 INFO L125 PetriNetUnfolderBase]: For 2617861/2617867 co-relation queries the response was YES. [2024-06-27 20:06:11,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83890 conditions, 7912 events. 4726/7912 cut-off events. For 2617861/2617867 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 54781 event pairs, 988 based on Foata normal form. 2/7910 useless extension candidates. Maximal degree in co-relation 83671. Up to 7256 conditions per place. [2024-06-27 20:06:11,498 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 512 selfloop transitions, 38 changer transitions 0/578 dead transitions. [2024-06-27 20:06:11,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 578 transitions, 7350 flow [2024-06-27 20:06:11,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:06:11,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:06:11,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 20:06:11,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-27 20:06:11,499 INFO L175 Difference]: Start difference. First operand has 458 places, 554 transitions, 5982 flow. Second operand 9 states and 168 transitions. [2024-06-27 20:06:11,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 578 transitions, 7350 flow [2024-06-27 20:06:18,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 578 transitions, 7122 flow, removed 82 selfloop flow, removed 7 redundant places. [2024-06-27 20:06:18,841 INFO L231 Difference]: Finished difference. Result has 461 places, 561 transitions, 6049 flow [2024-06-27 20:06:18,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5831, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6049, PETRI_PLACES=461, PETRI_TRANSITIONS=561} [2024-06-27 20:06:18,841 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 417 predicate places. [2024-06-27 20:06:18,841 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 561 transitions, 6049 flow [2024-06-27 20:06:18,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:18,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:18,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:18,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-27 20:06:18,841 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:06:18,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:18,842 INFO L85 PathProgramCache]: Analyzing trace with hash 107951481, now seen corresponding path program 7 times [2024-06-27 20:06:18,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:18,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513840606] [2024-06-27 20:06:18,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:18,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:18,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:19,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:19,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:19,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513840606] [2024-06-27 20:06:19,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513840606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:19,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:19,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:06:19,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445417561] [2024-06-27 20:06:19,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:19,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:06:19,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:19,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:06:19,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:06:19,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:06:19,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 561 transitions, 6049 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:19,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:19,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:06:19,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:22,023 INFO L124 PetriNetUnfolderBase]: 4775/7986 cut-off events. [2024-06-27 20:06:22,023 INFO L125 PetriNetUnfolderBase]: For 2725788/2725795 co-relation queries the response was YES. [2024-06-27 20:06:22,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85110 conditions, 7986 events. 4775/7986 cut-off events. For 2725788/2725795 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 55274 event pairs, 1000 based on Foata normal form. 3/7984 useless extension candidates. Maximal degree in co-relation 84889. Up to 7262 conditions per place. [2024-06-27 20:06:22,182 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 503 selfloop transitions, 55 changer transitions 0/586 dead transitions. [2024-06-27 20:06:22,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 586 transitions, 7811 flow [2024-06-27 20:06:22,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:06:22,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:06:22,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-27 20:06:22,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-27 20:06:22,183 INFO L175 Difference]: Start difference. First operand has 461 places, 561 transitions, 6049 flow. Second operand 9 states and 173 transitions. [2024-06-27 20:06:22,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 586 transitions, 7811 flow [2024-06-27 20:06:29,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 586 transitions, 7701 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-27 20:06:29,493 INFO L231 Difference]: Finished difference. Result has 466 places, 568 transitions, 6289 flow [2024-06-27 20:06:29,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5939, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6289, PETRI_PLACES=466, PETRI_TRANSITIONS=568} [2024-06-27 20:06:29,494 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 422 predicate places. [2024-06-27 20:06:29,494 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 568 transitions, 6289 flow [2024-06-27 20:06:29,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:29,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:29,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:29,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-27 20:06:29,494 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:06:29,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:29,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1795382523, now seen corresponding path program 2 times [2024-06-27 20:06:29,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:29,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601662074] [2024-06-27 20:06:29,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:29,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:29,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:31,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:31,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:31,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601662074] [2024-06-27 20:06:31,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601662074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:31,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:31,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:06:31,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579097291] [2024-06-27 20:06:31,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:31,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:06:31,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:31,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:06:31,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:06:31,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:06:31,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 568 transitions, 6289 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:31,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:31,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:06:31,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:33,388 INFO L124 PetriNetUnfolderBase]: 4718/7863 cut-off events. [2024-06-27 20:06:33,388 INFO L125 PetriNetUnfolderBase]: For 2734762/2734785 co-relation queries the response was YES. [2024-06-27 20:06:33,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86417 conditions, 7863 events. 4718/7863 cut-off events. For 2734762/2734785 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 54287 event pairs, 974 based on Foata normal form. 19/7800 useless extension candidates. Maximal degree in co-relation 86193. Up to 7198 conditions per place. [2024-06-27 20:06:33,534 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 507 selfloop transitions, 25 changer transitions 0/580 dead transitions. [2024-06-27 20:06:33,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 580 transitions, 7381 flow [2024-06-27 20:06:33,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:06:33,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:06:33,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 20:06:33,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082687338501292 [2024-06-27 20:06:33,535 INFO L175 Difference]: Start difference. First operand has 466 places, 568 transitions, 6289 flow. Second operand 9 states and 158 transitions. [2024-06-27 20:06:33,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 580 transitions, 7381 flow [2024-06-27 20:06:41,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 580 transitions, 7189 flow, removed 72 selfloop flow, removed 5 redundant places. [2024-06-27 20:06:41,507 INFO L231 Difference]: Finished difference. Result has 470 places, 568 transitions, 6153 flow [2024-06-27 20:06:41,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6097, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=543, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6153, PETRI_PLACES=470, PETRI_TRANSITIONS=568} [2024-06-27 20:06:41,508 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 426 predicate places. [2024-06-27 20:06:41,508 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 568 transitions, 6153 flow [2024-06-27 20:06:41,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:41,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:41,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:41,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-27 20:06:41,508 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:06:41,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:41,508 INFO L85 PathProgramCache]: Analyzing trace with hash -369146817, now seen corresponding path program 8 times [2024-06-27 20:06:41,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:41,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135540615] [2024-06-27 20:06:41,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:41,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:41,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:42,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:42,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:42,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135540615] [2024-06-27 20:06:42,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135540615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:42,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:42,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:06:42,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282398692] [2024-06-27 20:06:42,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:42,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:06:42,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:42,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:06:42,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:06:42,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:06:42,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 568 transitions, 6153 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:42,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:42,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:06:42,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:44,795 INFO L124 PetriNetUnfolderBase]: 4767/7976 cut-off events. [2024-06-27 20:06:44,796 INFO L125 PetriNetUnfolderBase]: For 2784739/2784746 co-relation queries the response was YES. [2024-06-27 20:06:44,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85756 conditions, 7976 events. 4767/7976 cut-off events. For 2784739/2784746 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 55198 event pairs, 1002 based on Foata normal form. 7/7977 useless extension candidates. Maximal degree in co-relation 85530. Up to 7298 conditions per place. [2024-06-27 20:06:44,949 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 516 selfloop transitions, 42 changer transitions 0/586 dead transitions. [2024-06-27 20:06:44,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 586 transitions, 7440 flow [2024-06-27 20:06:44,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:06:44,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:06:44,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 20:06:44,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-27 20:06:44,950 INFO L175 Difference]: Start difference. First operand has 470 places, 568 transitions, 6153 flow. Second operand 9 states and 166 transitions. [2024-06-27 20:06:44,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 586 transitions, 7440 flow [2024-06-27 20:06:54,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 586 transitions, 7312 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-27 20:06:54,453 INFO L231 Difference]: Finished difference. Result has 469 places, 571 transitions, 6205 flow [2024-06-27 20:06:54,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6025, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6205, PETRI_PLACES=469, PETRI_TRANSITIONS=571} [2024-06-27 20:06:54,453 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 425 predicate places. [2024-06-27 20:06:54,453 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 571 transitions, 6205 flow [2024-06-27 20:06:54,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:54,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:54,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:54,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-27 20:06:54,454 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:06:54,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:54,454 INFO L85 PathProgramCache]: Analyzing trace with hash 2080473465, now seen corresponding path program 9 times [2024-06-27 20:06:54,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:54,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152799171] [2024-06-27 20:06:54,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:54,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:54,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:55,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:55,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:55,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152799171] [2024-06-27 20:06:55,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152799171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:55,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:55,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:06:55,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779606642] [2024-06-27 20:06:55,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:55,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:06:55,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:55,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:06:55,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:06:55,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:06:55,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 571 transitions, 6205 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:55,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:55,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:06:55,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:58,069 INFO L124 PetriNetUnfolderBase]: 4761/7966 cut-off events. [2024-06-27 20:06:58,069 INFO L125 PetriNetUnfolderBase]: For 2732099/2732106 co-relation queries the response was YES. [2024-06-27 20:06:58,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85552 conditions, 7966 events. 4761/7966 cut-off events. For 2732099/2732106 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 55107 event pairs, 993 based on Foata normal form. 3/7963 useless extension candidates. Maximal degree in co-relation 85326. Up to 7212 conditions per place. [2024-06-27 20:06:58,215 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 504 selfloop transitions, 88 changer transitions 0/620 dead transitions. [2024-06-27 20:06:58,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 620 transitions, 8295 flow [2024-06-27 20:06:58,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:06:58,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:06:58,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 20:06:58,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-27 20:06:58,216 INFO L175 Difference]: Start difference. First operand has 469 places, 571 transitions, 6205 flow. Second operand 9 states and 168 transitions. [2024-06-27 20:06:58,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 620 transitions, 8295 flow [2024-06-27 20:07:07,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 620 transitions, 8067 flow, removed 73 selfloop flow, removed 7 redundant places. [2024-06-27 20:07:07,461 INFO L231 Difference]: Finished difference. Result has 474 places, 602 transitions, 6759 flow [2024-06-27 20:07:07,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6046, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6759, PETRI_PLACES=474, PETRI_TRANSITIONS=602} [2024-06-27 20:07:07,462 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 430 predicate places. [2024-06-27 20:07:07,462 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 602 transitions, 6759 flow [2024-06-27 20:07:07,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:07,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:07,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:07:07,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-27 20:07:07,462 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:07:07,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:07,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1795142955, now seen corresponding path program 10 times [2024-06-27 20:07:07,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:07,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652760573] [2024-06-27 20:07:07,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:07,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:07,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:08,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:08,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:08,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652760573] [2024-06-27 20:07:08,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652760573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:08,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:08,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:07:08,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65105377] [2024-06-27 20:07:08,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:08,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:07:08,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:08,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:07:08,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:07:08,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:07:08,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 602 transitions, 6759 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:08,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:08,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:07:08,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:11,127 INFO L124 PetriNetUnfolderBase]: 4757/7960 cut-off events. [2024-06-27 20:07:11,127 INFO L125 PetriNetUnfolderBase]: For 2736247/2736254 co-relation queries the response was YES. [2024-06-27 20:07:11,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85892 conditions, 7960 events. 4757/7960 cut-off events. For 2736247/2736254 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 55080 event pairs, 996 based on Foata normal form. 2/7957 useless extension candidates. Maximal degree in co-relation 85662. Up to 7286 conditions per place. [2024-06-27 20:07:11,277 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 545 selfloop transitions, 46 changer transitions 0/619 dead transitions. [2024-06-27 20:07:11,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 619 transitions, 8058 flow [2024-06-27 20:07:11,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:07:11,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:07:11,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-27 20:07:11,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-27 20:07:11,278 INFO L175 Difference]: Start difference. First operand has 474 places, 602 transitions, 6759 flow. Second operand 9 states and 167 transitions. [2024-06-27 20:07:11,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 619 transitions, 8058 flow [2024-06-27 20:07:20,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 619 transitions, 7868 flow, removed 75 selfloop flow, removed 3 redundant places. [2024-06-27 20:07:20,088 INFO L231 Difference]: Finished difference. Result has 481 places, 605 transitions, 6716 flow [2024-06-27 20:07:20,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6569, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6716, PETRI_PLACES=481, PETRI_TRANSITIONS=605} [2024-06-27 20:07:20,088 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 437 predicate places. [2024-06-27 20:07:20,088 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 605 transitions, 6716 flow [2024-06-27 20:07:20,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:20,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:20,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:07:20,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-27 20:07:20,089 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:07:20,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:20,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1073320135, now seen corresponding path program 1 times [2024-06-27 20:07:20,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:20,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400610727] [2024-06-27 20:07:20,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:20,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:20,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:21,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:21,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:21,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400610727] [2024-06-27 20:07:21,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400610727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:21,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:21,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:07:21,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798817668] [2024-06-27 20:07:21,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:21,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:07:21,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:21,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:07:21,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:07:21,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:07:21,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 605 transitions, 6716 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:21,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:21,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:07:21,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:23,733 INFO L124 PetriNetUnfolderBase]: 4719/7862 cut-off events. [2024-06-27 20:07:23,734 INFO L125 PetriNetUnfolderBase]: For 2771118/2771140 co-relation queries the response was YES. [2024-06-27 20:07:23,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86139 conditions, 7862 events. 4719/7862 cut-off events. For 2771118/2771140 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 54037 event pairs, 815 based on Foata normal form. 18/7825 useless extension candidates. Maximal degree in co-relation 85906. Up to 7151 conditions per place. [2024-06-27 20:07:23,948 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 570 selfloop transitions, 17 changer transitions 0/637 dead transitions. [2024-06-27 20:07:23,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 637 transitions, 8012 flow [2024-06-27 20:07:23,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:07:23,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:07:23,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 20:07:23,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 20:07:23,949 INFO L175 Difference]: Start difference. First operand has 481 places, 605 transitions, 6716 flow. Second operand 9 states and 171 transitions. [2024-06-27 20:07:23,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 637 transitions, 8012 flow [2024-06-27 20:07:32,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 637 transitions, 7904 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-27 20:07:32,113 INFO L231 Difference]: Finished difference. Result has 485 places, 607 transitions, 6699 flow [2024-06-27 20:07:32,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6608, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6699, PETRI_PLACES=485, PETRI_TRANSITIONS=607} [2024-06-27 20:07:32,113 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 441 predicate places. [2024-06-27 20:07:32,113 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 607 transitions, 6699 flow [2024-06-27 20:07:32,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:32,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:32,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:07:32,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-27 20:07:32,114 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:07:32,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:32,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1518651843, now seen corresponding path program 2 times [2024-06-27 20:07:32,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:32,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563196757] [2024-06-27 20:07:32,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:32,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:32,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:33,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:33,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:33,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563196757] [2024-06-27 20:07:33,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563196757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:33,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:33,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:07:33,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720089929] [2024-06-27 20:07:33,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:33,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:07:33,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:33,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:07:33,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:07:33,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:07:33,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 607 transitions, 6699 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:33,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:33,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:07:33,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:35,898 INFO L124 PetriNetUnfolderBase]: 4727/7874 cut-off events. [2024-06-27 20:07:35,898 INFO L125 PetriNetUnfolderBase]: For 2798715/2798737 co-relation queries the response was YES. [2024-06-27 20:07:36,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86543 conditions, 7874 events. 4727/7874 cut-off events. For 2798715/2798737 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 54378 event pairs, 962 based on Foata normal form. 18/7807 useless extension candidates. Maximal degree in co-relation 86308. Up to 7192 conditions per place. [2024-06-27 20:07:36,058 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 567 selfloop transitions, 18 changer transitions 0/635 dead transitions. [2024-06-27 20:07:36,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 635 transitions, 7985 flow [2024-06-27 20:07:36,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:07:36,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:07:36,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 20:07:36,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-27 20:07:36,059 INFO L175 Difference]: Start difference. First operand has 485 places, 607 transitions, 6699 flow. Second operand 9 states and 168 transitions. [2024-06-27 20:07:36,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 635 transitions, 7985 flow [2024-06-27 20:07:44,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 635 transitions, 7900 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-27 20:07:44,908 INFO L231 Difference]: Finished difference. Result has 487 places, 609 transitions, 6711 flow [2024-06-27 20:07:44,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6614, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=589, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6711, PETRI_PLACES=487, PETRI_TRANSITIONS=609} [2024-06-27 20:07:44,909 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 443 predicate places. [2024-06-27 20:07:44,909 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 609 transitions, 6711 flow [2024-06-27 20:07:44,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:44,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:44,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:07:44,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-27 20:07:44,909 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:07:44,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:44,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1671691241, now seen corresponding path program 3 times [2024-06-27 20:07:44,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:44,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921570868] [2024-06-27 20:07:44,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:44,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:44,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:46,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:46,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:46,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921570868] [2024-06-27 20:07:46,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921570868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:46,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:46,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:07:46,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909618464] [2024-06-27 20:07:46,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:46,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:07:46,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:46,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:07:46,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:07:46,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:07:46,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 609 transitions, 6711 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:46,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:46,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:07:46,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:48,813 INFO L124 PetriNetUnfolderBase]: 4740/7893 cut-off events. [2024-06-27 20:07:48,814 INFO L125 PetriNetUnfolderBase]: For 2827215/2827237 co-relation queries the response was YES. [2024-06-27 20:07:48,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86945 conditions, 7893 events. 4740/7893 cut-off events. For 2827215/2827237 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 54465 event pairs, 964 based on Foata normal form. 18/7826 useless extension candidates. Maximal degree in co-relation 86709. Up to 7216 conditions per place. [2024-06-27 20:07:48,964 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 570 selfloop transitions, 19 changer transitions 0/639 dead transitions. [2024-06-27 20:07:48,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 639 transitions, 8030 flow [2024-06-27 20:07:48,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:07:48,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:07:48,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 20:07:48,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-27 20:07:48,965 INFO L175 Difference]: Start difference. First operand has 487 places, 609 transitions, 6711 flow. Second operand 9 states and 168 transitions. [2024-06-27 20:07:48,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 639 transitions, 8030 flow [2024-06-27 20:07:59,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 639 transitions, 7949 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-27 20:07:59,570 INFO L231 Difference]: Finished difference. Result has 490 places, 614 transitions, 6766 flow [2024-06-27 20:07:59,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6630, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=590, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6766, PETRI_PLACES=490, PETRI_TRANSITIONS=614} [2024-06-27 20:07:59,570 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 446 predicate places. [2024-06-27 20:07:59,570 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 614 transitions, 6766 flow [2024-06-27 20:07:59,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:59,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:59,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:07:59,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-27 20:07:59,571 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:07:59,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:59,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1435042449, now seen corresponding path program 1 times [2024-06-27 20:07:59,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:59,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751240733] [2024-06-27 20:07:59,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:59,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:59,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:08:00,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:08:00,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:08:00,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751240733] [2024-06-27 20:08:00,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751240733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:08:00,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:08:00,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:08:00,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084776061] [2024-06-27 20:08:00,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:08:00,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:08:00,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:08:00,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:08:00,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:08:00,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:08:00,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 614 transitions, 6766 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) [2024-06-27 20:08:00,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:08:00,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:08:00,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:08:03,180 INFO L124 PetriNetUnfolderBase]: 4969/8194 cut-off events. [2024-06-27 20:08:03,180 INFO L125 PetriNetUnfolderBase]: For 2816072/2816072 co-relation queries the response was YES. [2024-06-27 20:08:03,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88876 conditions, 8194 events. 4969/8194 cut-off events. For 2816072/2816072 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 55701 event pairs, 1023 based on Foata normal form. 1/8194 useless extension candidates. Maximal degree in co-relation 88638. Up to 7708 conditions per place. [2024-06-27 20:08:03,442 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 622 selfloop transitions, 20 changer transitions 0/647 dead transitions. [2024-06-27 20:08:03,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 647 transitions, 8278 flow [2024-06-27 20:08:03,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:08:03,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:08:03,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 20:08:03,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-27 20:08:03,443 INFO L175 Difference]: Start difference. First operand has 490 places, 614 transitions, 6766 flow. Second operand 9 states and 166 transitions. [2024-06-27 20:08:03,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 647 transitions, 8278 flow [2024-06-27 20:08:14,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 647 transitions, 8191 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-27 20:08:14,465 INFO L231 Difference]: Finished difference. Result has 493 places, 617 transitions, 6883 flow [2024-06-27 20:08:14,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6679, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=594, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6883, PETRI_PLACES=493, PETRI_TRANSITIONS=617} [2024-06-27 20:08:14,466 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 449 predicate places. [2024-06-27 20:08:14,466 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 617 transitions, 6883 flow [2024-06-27 20:08:14,466 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) [2024-06-27 20:08:14,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:08:14,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:08:14,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-27 20:08:14,466 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:08:14,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:08:14,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1435221939, now seen corresponding path program 2 times [2024-06-27 20:08:14,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:08:14,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945206561] [2024-06-27 20:08:14,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:08:14,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:08:14,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:08:15,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:08:15,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:08:15,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945206561] [2024-06-27 20:08:15,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945206561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:08:15,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:08:15,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:08:15,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580324310] [2024-06-27 20:08:15,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:08:15,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:08:15,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:08:15,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:08:15,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:08:15,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:08:15,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 617 transitions, 6883 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) [2024-06-27 20:08:15,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:08:15,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:08:15,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:08:18,062 INFO L124 PetriNetUnfolderBase]: 4974/8201 cut-off events. [2024-06-27 20:08:18,062 INFO L125 PetriNetUnfolderBase]: For 2852381/2852381 co-relation queries the response was YES. [2024-06-27 20:08:18,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89561 conditions, 8201 events. 4974/8201 cut-off events. For 2852381/2852381 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 55779 event pairs, 1023 based on Foata normal form. 1/8201 useless extension candidates. Maximal degree in co-relation 89322. Up to 7709 conditions per place. [2024-06-27 20:08:18,210 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 617 selfloop transitions, 25 changer transitions 0/647 dead transitions. [2024-06-27 20:08:18,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 647 transitions, 8393 flow [2024-06-27 20:08:18,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:08:18,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:08:18,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 20:08:18,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-27 20:08:18,211 INFO L175 Difference]: Start difference. First operand has 493 places, 617 transitions, 6883 flow. Second operand 9 states and 165 transitions. [2024-06-27 20:08:18,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 647 transitions, 8393 flow [2024-06-27 20:08:29,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 647 transitions, 8211 flow, removed 73 selfloop flow, removed 7 redundant places. [2024-06-27 20:08:29,178 INFO L231 Difference]: Finished difference. Result has 495 places, 620 transitions, 6921 flow [2024-06-27 20:08:29,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6701, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=592, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6921, PETRI_PLACES=495, PETRI_TRANSITIONS=620} [2024-06-27 20:08:29,178 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 451 predicate places. [2024-06-27 20:08:29,178 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 620 transitions, 6921 flow [2024-06-27 20:08:29,178 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) [2024-06-27 20:08:29,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:08:29,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:08:29,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-27 20:08:29,178 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:08:29,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:08:29,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1435222187, now seen corresponding path program 1 times [2024-06-27 20:08:29,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:08:29,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279257643] [2024-06-27 20:08:29,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:08:29,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:08:29,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:08:30,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:08:30,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:08:30,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279257643] [2024-06-27 20:08:30,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279257643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:08:30,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:08:30,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:08:30,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543655377] [2024-06-27 20:08:30,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:08:30,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:08:30,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:08:30,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:08:30,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:08:30,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:08:30,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 620 transitions, 6921 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:30,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:08:30,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:08:30,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:08:32,819 INFO L124 PetriNetUnfolderBase]: 4755/7914 cut-off events. [2024-06-27 20:08:32,819 INFO L125 PetriNetUnfolderBase]: For 2917273/2917295 co-relation queries the response was YES. [2024-06-27 20:08:32,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88601 conditions, 7914 events. 4755/7914 cut-off events. For 2917273/2917295 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 54578 event pairs, 962 based on Foata normal form. 17/7846 useless extension candidates. Maximal degree in co-relation 88361. Up to 7230 conditions per place. [2024-06-27 20:08:32,978 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 578 selfloop transitions, 20 changer transitions 0/650 dead transitions. [2024-06-27 20:08:32,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 650 transitions, 8297 flow [2024-06-27 20:08:32,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:08:32,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:08:32,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 20:08:32,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 20:08:32,979 INFO L175 Difference]: Start difference. First operand has 495 places, 620 transitions, 6921 flow. Second operand 9 states and 171 transitions. [2024-06-27 20:08:32,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 650 transitions, 8297 flow [2024-06-27 20:08:42,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 650 transitions, 8099 flow, removed 76 selfloop flow, removed 7 redundant places. [2024-06-27 20:08:42,247 INFO L231 Difference]: Finished difference. Result has 497 places, 623 transitions, 6887 flow [2024-06-27 20:08:42,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6723, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=600, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6887, PETRI_PLACES=497, PETRI_TRANSITIONS=623} [2024-06-27 20:08:42,247 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 453 predicate places. [2024-06-27 20:08:42,247 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 623 transitions, 6887 flow [2024-06-27 20:08:42,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:42,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:08:42,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:08:42,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-27 20:08:42,248 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:08:42,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:08:42,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1519040769, now seen corresponding path program 2 times [2024-06-27 20:08:42,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:08:42,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803031963] [2024-06-27 20:08:42,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:08:42,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:08:42,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:08:43,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:08:43,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:08:43,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803031963] [2024-06-27 20:08:43,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803031963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:08:43,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:08:43,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:08:43,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152479955] [2024-06-27 20:08:43,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:08:43,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:08:43,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:08:43,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:08:43,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:08:43,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:08:43,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 623 transitions, 6887 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:43,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:08:43,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:08:43,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:08:45,867 INFO L124 PetriNetUnfolderBase]: 4768/7932 cut-off events. [2024-06-27 20:08:45,867 INFO L125 PetriNetUnfolderBase]: For 2967307/2967329 co-relation queries the response was YES. [2024-06-27 20:08:45,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89581 conditions, 7932 events. 4768/7932 cut-off events. For 2967307/2967329 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 54744 event pairs, 962 based on Foata normal form. 17/7864 useless extension candidates. Maximal degree in co-relation 89340. Up to 7232 conditions per place. [2024-06-27 20:08:46,015 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 572 selfloop transitions, 34 changer transitions 0/658 dead transitions. [2024-06-27 20:08:46,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 658 transitions, 8761 flow [2024-06-27 20:08:46,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:08:46,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:08:46,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-27 20:08:46,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43953488372093025 [2024-06-27 20:08:46,016 INFO L175 Difference]: Start difference. First operand has 497 places, 623 transitions, 6887 flow. Second operand 10 states and 189 transitions. [2024-06-27 20:08:46,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 658 transitions, 8761 flow Killed by 15