./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 eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/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-eb4cb34-m [2024-06-21 16:18:20,854 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 16:18:20,942 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 16:18:20,947 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 16:18:20,948 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 16:18:20,980 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 16:18:20,980 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 16:18:20,981 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 16:18:20,981 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 16:18:20,985 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 16:18:20,985 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 16:18:20,985 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 16:18:20,986 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 16:18:20,987 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 16:18:20,987 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 16:18:20,988 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 16:18:20,988 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 16:18:20,988 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 16:18:20,988 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 16:18:20,988 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 16:18:20,988 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 16:18:20,989 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 16:18:20,989 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 16:18:20,989 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 16:18:20,989 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 16:18:20,990 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 16:18:20,990 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 16:18:20,990 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 16:18:20,991 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 16:18:20,991 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 16:18:20,991 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 16:18:20,992 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 16:18:20,992 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:18:20,992 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 16:18:20,992 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 16:18:20,992 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 16:18:20,993 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 16:18:20,993 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 16:18:20,993 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 16:18:20,993 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 16:18:20,993 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 16:18:20,994 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 16:18:20,994 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 16:18:20,994 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 16:18:21,225 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 16:18:21,241 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 16:18:21,243 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 16:18:21,244 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 16:18:21,245 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 16:18:21,246 INFO L431 ainManager$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 [2024-06-21 16:18:21,401 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 16:18:21,401 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 16:18:21,402 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix010.opt.i [2024-06-21 16:18:22,469 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 16:18:22,727 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 16:18:22,728 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix010.opt.i [2024-06-21 16:18:22,749 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7bd26ec5/432d8cfbfbc64d6990fe5b21a857ac9f/FLAGd00a88d0d [2024-06-21 16:18:22,761 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7bd26ec5/432d8cfbfbc64d6990fe5b21a857ac9f [2024-06-21 16:18:22,762 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 16:18:22,763 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 16:18:22,764 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 16:18:22,764 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 16:18:22,769 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 16:18:22,769 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:18:21" (1/2) ... [2024-06-21 16:18:22,770 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2191aaa6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:18:22, skipping insertion in model container [2024-06-21 16:18:22,771 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:18:21" (1/2) ... [2024-06-21 16:18:22,772 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4204bb45 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:18:22, skipping insertion in model container [2024-06-21 16:18:22,772 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:18:22" (2/2) ... [2024-06-21 16:18:22,772 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2191aaa6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:18:22, skipping insertion in model container [2024-06-21 16:18:22,773 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:18:22" (2/2) ... [2024-06-21 16:18:22,773 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 16:18:22,852 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 16:18:22,853 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$flush_delayed == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) [2024-06-21 16:18:22,853 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] (((((((((((((((((((((! multithreaded || (x == 0 || x == 1)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z$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)) [2024-06-21 16:18:22,854 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)) [2024-06-21 16:18:22,854 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 16:18:22,854 INFO L106 edCorrectnessWitness]: ghost_update [L854-L854] multithreaded = 1; [2024-06-21 16:18:22,891 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 16:18:23,251 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:18:23,261 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 16:18:23,358 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:18:23,386 INFO L206 MainTranslator]: Completed translation [2024-06-21 16:18:23,387 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:18:23 WrapperNode [2024-06-21 16:18:23,387 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 16:18:23,388 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 16:18:23,388 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 16:18:23,388 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 16:18:23,393 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:18:23" (1/1) ... [2024-06-21 16:18:23,405 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:18:23" (1/1) ... [2024-06-21 16:18:23,426 INFO L138 Inliner]: procedures = 175, calls = 49, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 151 [2024-06-21 16:18:23,427 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 16:18:23,427 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 16:18:23,427 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 16:18:23,428 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 16:18:23,441 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:18:23" (1/1) ... [2024-06-21 16:18:23,442 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:18:23" (1/1) ... [2024-06-21 16:18:23,445 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:18:23" (1/1) ... [2024-06-21 16:18:23,464 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 16:18:23,464 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:18:23" (1/1) ... [2024-06-21 16:18:23,465 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:18:23" (1/1) ... [2024-06-21 16:18:23,472 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:18:23" (1/1) ... [2024-06-21 16:18:23,473 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:18:23" (1/1) ... [2024-06-21 16:18:23,475 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:18:23" (1/1) ... [2024-06-21 16:18:23,476 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:18:23" (1/1) ... [2024-06-21 16:18:23,479 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 16:18:23,479 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 16:18:23,480 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 16:18:23,480 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 16:18:23,480 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:18:23" (1/1) ... [2024-06-21 16:18:23,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:18:23,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 16:18:23,554 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 16:18:23,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 16:18:23,608 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 16:18:23,608 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 16:18:23,609 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 16:18:23,609 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 16:18:23,609 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 16:18:23,609 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 16:18:23,609 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 16:18:23,609 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 16:18:23,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 16:18:23,610 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 16:18:23,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 16:18:23,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 16:18:23,612 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 16:18:23,717 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 16:18:23,719 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 16:18:24,063 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 16:18:24,064 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 16:18:24,200 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 16:18:24,200 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 16:18:24,201 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:18:24 BoogieIcfgContainer [2024-06-21 16:18:24,201 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 16:18:24,204 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 16:18:24,204 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 16:18:24,206 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 16:18:24,206 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:18:21" (1/4) ... [2024-06-21 16:18:24,207 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38ca941f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 04:18:24, skipping insertion in model container [2024-06-21 16:18:24,207 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 04:18:22" (2/4) ... [2024-06-21 16:18:24,208 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38ca941f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 04:18:24, skipping insertion in model container [2024-06-21 16:18:24,208 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:18:23" (3/4) ... [2024-06-21 16:18:24,209 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38ca941f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 04:18:24, skipping insertion in model container [2024-06-21 16:18:24,210 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:18:24" (4/4) ... [2024-06-21 16:18:24,211 INFO L112 eAbstractionObserver]: Analyzing ICFG mix010.opt.i [2024-06-21 16:18:24,223 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 16:18:24,224 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 16:18:24,224 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 16:18:24,267 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 16:18:24,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-21 16:18:24,327 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-21 16:18:24,327 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:18:24,330 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. [2024-06-21 16:18:24,330 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-21 16:18:24,333 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-21 16:18:24,345 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 16:18:24,352 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;@759d0230, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 16:18:24,352 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 16:18:24,358 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 16:18:24,358 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 16:18:24,359 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:18:24,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:24,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 16:18:24,360 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:18:24,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:24,364 INFO L85 PathProgramCache]: Analyzing trace with hash 402657065, now seen corresponding path program 1 times [2024-06-21 16:18:24,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:24,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656029774] [2024-06-21 16:18:24,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:24,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:24,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:25,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:25,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:25,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656029774] [2024-06-21 16:18:25,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656029774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:25,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:25,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 16:18:25,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620610396] [2024-06-21 16:18:25,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:25,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 16:18:25,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:25,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 16:18:25,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 16:18:25,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-06-21 16:18:25,565 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) [2024-06-21 16:18:25,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:25,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-06-21 16:18:25,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:25,847 INFO L124 PetriNetUnfolderBase]: 1059/1701 cut-off events. [2024-06-21 16:18:25,848 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-06-21 16:18:25,854 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. [2024-06-21 16:18:25,862 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 31 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-21 16:18:25,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 173 flow [2024-06-21 16:18:25,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 16:18:25,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 16:18:25,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2024-06-21 16:18:25,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6434108527131783 [2024-06-21 16:18:25,873 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 83 transitions. [2024-06-21 16:18:25,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 173 flow [2024-06-21 16:18:25,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 168 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 16:18:25,877 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-21 16:18:25,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-21 16:18:25,882 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-21 16:18:25,882 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-21 16:18:25,882 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) [2024-06-21 16:18:25,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:25,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:25,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 16:18:25,883 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:18:25,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:25,884 INFO L85 PathProgramCache]: Analyzing trace with hash 407527642, now seen corresponding path program 1 times [2024-06-21 16:18:25,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:25,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093506932] [2024-06-21 16:18:25,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:25,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:25,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:26,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:26,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:26,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093506932] [2024-06-21 16:18:26,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093506932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:26,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:26,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 16:18:26,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197914838] [2024-06-21 16:18:26,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:26,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 16:18:26,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:26,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 16:18:26,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 16:18:26,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2024-06-21 16:18:26,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:26,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:26,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2024-06-21 16:18:26,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:26,825 INFO L124 PetriNetUnfolderBase]: 1215/1890 cut-off events. [2024-06-21 16:18:26,826 INFO L125 PetriNetUnfolderBase]: For 393/393 co-relation queries the response was YES. [2024-06-21 16:18:26,828 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. [2024-06-21 16:18:26,834 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 39 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-21 16:18:26,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 242 flow [2024-06-21 16:18:26,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 16:18:26,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 16:18:26,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-06-21 16:18:26,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6104651162790697 [2024-06-21 16:18:26,836 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 105 transitions. [2024-06-21 16:18:26,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 242 flow [2024-06-21 16:18:26,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 16:18:26,838 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-21 16:18:26,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-21 16:18:26,839 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-21 16:18:26,839 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-21 16:18:26,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:26,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:26,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:26,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 16:18:26,840 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:18:26,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:26,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1215866847, now seen corresponding path program 1 times [2024-06-21 16:18:26,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:26,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613104032] [2024-06-21 16:18:26,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:26,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:26,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:27,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:27,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:27,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613104032] [2024-06-21 16:18:27,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613104032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:27,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:27,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:18:27,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066784246] [2024-06-21 16:18:27,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:27,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:18:27,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:27,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:18:27,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:18:27,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-21 16:18:27,895 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) [2024-06-21 16:18:27,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:27,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-21 16:18:27,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:28,207 INFO L124 PetriNetUnfolderBase]: 1545/2363 cut-off events. [2024-06-21 16:18:28,208 INFO L125 PetriNetUnfolderBase]: For 1295/1295 co-relation queries the response was YES. [2024-06-21 16:18:28,210 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. [2024-06-21 16:18:28,217 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 51 selfloop transitions, 12 changer transitions 0/70 dead transitions. [2024-06-21 16:18:28,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 70 transitions, 354 flow [2024-06-21 16:18:28,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:18:28,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:18:28,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-21 16:18:28,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5581395348837209 [2024-06-21 16:18:28,219 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 6 states and 144 transitions. [2024-06-21 16:18:28,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 70 transitions, 354 flow [2024-06-21 16:18:28,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 70 transitions, 334 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-21 16:18:28,221 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 183 flow [2024-06-21 16:18:28,222 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} [2024-06-21 16:18:28,222 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 7 predicate places. [2024-06-21 16:18:28,222 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 183 flow [2024-06-21 16:18:28,222 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) [2024-06-21 16:18:28,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:28,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:28,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 16:18:28,223 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:18:28,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:28,224 INFO L85 PathProgramCache]: Analyzing trace with hash -532318793, now seen corresponding path program 1 times [2024-06-21 16:18:28,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:28,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96222682] [2024-06-21 16:18:28,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:28,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:28,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:28,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:28,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:28,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96222682] [2024-06-21 16:18:28,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96222682] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:28,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:28,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:18:28,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414175808] [2024-06-21 16:18:28,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:28,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:18:28,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:28,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:18:28,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:18:28,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 16:18:28,876 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) [2024-06-21 16:18:28,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:28,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 16:18:28,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:29,245 INFO L124 PetriNetUnfolderBase]: 1333/2109 cut-off events. [2024-06-21 16:18:29,246 INFO L125 PetriNetUnfolderBase]: For 2120/2120 co-relation queries the response was YES. [2024-06-21 16:18:29,248 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. [2024-06-21 16:18:29,255 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 43 selfloop transitions, 8 changer transitions 0/58 dead transitions. [2024-06-21 16:18:29,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 58 transitions, 327 flow [2024-06-21 16:18:29,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:18:29,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:18:29,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 105 transitions. [2024-06-21 16:18:29,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-21 16:18:29,257 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 183 flow. Second operand 5 states and 105 transitions. [2024-06-21 16:18:29,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 58 transitions, 327 flow [2024-06-21 16:18:29,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 58 transitions, 300 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 16:18:29,259 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 200 flow [2024-06-21 16:18:29,260 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} [2024-06-21 16:18:29,260 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 9 predicate places. [2024-06-21 16:18:29,260 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 200 flow [2024-06-21 16:18:29,261 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) [2024-06-21 16:18:29,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:29,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:29,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 16:18:29,261 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)] === [2024-06-21 16:18:29,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:29,262 INFO L85 PathProgramCache]: Analyzing trace with hash 709268787, now seen corresponding path program 1 times [2024-06-21 16:18:29,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:29,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048913639] [2024-06-21 16:18:29,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:29,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:29,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:29,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:29,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:29,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048913639] [2024-06-21 16:18:29,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048913639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:29,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:29,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:18:29,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900359042] [2024-06-21 16:18:29,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:29,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:18:29,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:29,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:18:29,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:18:29,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:18:29,946 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) [2024-06-21 16:18:29,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:29,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:18:29,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:30,434 INFO L124 PetriNetUnfolderBase]: 1571/2467 cut-off events. [2024-06-21 16:18:30,434 INFO L125 PetriNetUnfolderBase]: For 3658/3658 co-relation queries the response was YES. [2024-06-21 16:18:30,437 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. [2024-06-21 16:18:30,445 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 48 selfloop transitions, 11 changer transitions 0/65 dead transitions. [2024-06-21 16:18:30,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 65 transitions, 374 flow [2024-06-21 16:18:30,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:18:30,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:18:30,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-21 16:18:30,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46124031007751937 [2024-06-21 16:18:30,447 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 200 flow. Second operand 6 states and 119 transitions. [2024-06-21 16:18:30,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 65 transitions, 374 flow [2024-06-21 16:18:30,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 65 transitions, 354 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 16:18:30,449 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 234 flow [2024-06-21 16:18:30,449 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} [2024-06-21 16:18:30,450 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 12 predicate places. [2024-06-21 16:18:30,450 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 234 flow [2024-06-21 16:18:30,450 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) [2024-06-21 16:18:30,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:30,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:30,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 16:18:30,451 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:18:30,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:30,451 INFO L85 PathProgramCache]: Analyzing trace with hash 538200428, now seen corresponding path program 1 times [2024-06-21 16:18:30,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:30,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684329665] [2024-06-21 16:18:30,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:30,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:30,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:31,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:31,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:31,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684329665] [2024-06-21 16:18:31,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684329665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:31,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:31,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:18:31,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107101769] [2024-06-21 16:18:31,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:31,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:18:31,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:31,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:18:31,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:18:31,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:18:31,113 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) [2024-06-21 16:18:31,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:31,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:18:31,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:31,643 INFO L124 PetriNetUnfolderBase]: 1717/2637 cut-off events. [2024-06-21 16:18:31,643 INFO L125 PetriNetUnfolderBase]: For 6206/6212 co-relation queries the response was YES. [2024-06-21 16:18:31,646 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. [2024-06-21 16:18:31,658 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 53 selfloop transitions, 16 changer transitions 0/76 dead transitions. [2024-06-21 16:18:31,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 76 transitions, 482 flow [2024-06-21 16:18:31,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:18:31,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:18:31,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-06-21 16:18:31,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-21 16:18:31,660 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 234 flow. Second operand 6 states and 126 transitions. [2024-06-21 16:18:31,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 76 transitions, 482 flow [2024-06-21 16:18:31,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 76 transitions, 452 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 16:18:31,663 INFO L231 Difference]: Finished difference. Result has 58 places, 56 transitions, 290 flow [2024-06-21 16:18:31,664 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} [2024-06-21 16:18:31,665 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2024-06-21 16:18:31,666 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 56 transitions, 290 flow [2024-06-21 16:18:31,666 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) [2024-06-21 16:18:31,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:31,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:31,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 16:18:31,666 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:18:31,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:31,667 INFO L85 PathProgramCache]: Analyzing trace with hash 544663928, now seen corresponding path program 2 times [2024-06-21 16:18:31,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:31,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203370879] [2024-06-21 16:18:31,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:31,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:31,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:32,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:32,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:32,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203370879] [2024-06-21 16:18:32,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203370879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:32,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:32,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:18:32,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534166032] [2024-06-21 16:18:32,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:32,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:18:32,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:32,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:18:32,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:18:32,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:18:32,336 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) [2024-06-21 16:18:32,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:32,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:18:32,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:32,898 INFO L124 PetriNetUnfolderBase]: 1712/2631 cut-off events. [2024-06-21 16:18:32,899 INFO L125 PetriNetUnfolderBase]: For 8385/8390 co-relation queries the response was YES. [2024-06-21 16:18:32,904 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. [2024-06-21 16:18:32,919 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 48 selfloop transitions, 16 changer transitions 0/71 dead transitions. [2024-06-21 16:18:32,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 71 transitions, 456 flow [2024-06-21 16:18:32,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:18:32,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:18:32,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-21 16:18:32,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4689922480620155 [2024-06-21 16:18:32,921 INFO L175 Difference]: Start difference. First operand has 58 places, 56 transitions, 290 flow. Second operand 6 states and 121 transitions. [2024-06-21 16:18:32,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 71 transitions, 456 flow [2024-06-21 16:18:32,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 71 transitions, 422 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-21 16:18:32,928 INFO L231 Difference]: Finished difference. Result has 62 places, 56 transitions, 296 flow [2024-06-21 16:18:32,928 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} [2024-06-21 16:18:32,930 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 18 predicate places. [2024-06-21 16:18:32,930 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 56 transitions, 296 flow [2024-06-21 16:18:32,930 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) [2024-06-21 16:18:32,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:32,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:32,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 16:18:32,931 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:18:32,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:32,931 INFO L85 PathProgramCache]: Analyzing trace with hash 512497584, now seen corresponding path program 1 times [2024-06-21 16:18:32,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:32,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891440298] [2024-06-21 16:18:32,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:32,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:32,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:33,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:33,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:33,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891440298] [2024-06-21 16:18:33,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891440298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:33,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:33,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:18:33,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960330535] [2024-06-21 16:18:33,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:33,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:18:33,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:33,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:18:33,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:18:33,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:18:33,787 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) [2024-06-21 16:18:33,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:33,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:18:33,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:34,408 INFO L124 PetriNetUnfolderBase]: 1567/2474 cut-off events. [2024-06-21 16:18:34,408 INFO L125 PetriNetUnfolderBase]: For 8128/8128 co-relation queries the response was YES. [2024-06-21 16:18:34,413 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. [2024-06-21 16:18:34,423 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 59 selfloop transitions, 14 changer transitions 0/79 dead transitions. [2024-06-21 16:18:34,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 79 transitions, 516 flow [2024-06-21 16:18:34,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:18:34,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:18:34,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-21 16:18:34,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584717607973422 [2024-06-21 16:18:34,427 INFO L175 Difference]: Start difference. First operand has 62 places, 56 transitions, 296 flow. Second operand 7 states and 138 transitions. [2024-06-21 16:18:34,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 79 transitions, 516 flow [2024-06-21 16:18:34,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 79 transitions, 472 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 16:18:34,434 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 318 flow [2024-06-21 16:18:34,435 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} [2024-06-21 16:18:34,435 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 19 predicate places. [2024-06-21 16:18:34,435 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 318 flow [2024-06-21 16:18:34,436 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) [2024-06-21 16:18:34,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:34,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:34,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 16:18:34,436 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:18:34,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:34,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1294959864, now seen corresponding path program 1 times [2024-06-21 16:18:34,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:34,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405564989] [2024-06-21 16:18:34,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:34,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:34,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:35,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:35,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:35,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405564989] [2024-06-21 16:18:35,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405564989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:35,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:35,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:18:35,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420042937] [2024-06-21 16:18:35,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:35,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:18:35,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:35,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:18:35,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:18:35,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:18:35,282 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) [2024-06-21 16:18:35,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:35,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:18:35,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:35,879 INFO L124 PetriNetUnfolderBase]: 1713/2636 cut-off events. [2024-06-21 16:18:35,879 INFO L125 PetriNetUnfolderBase]: For 12167/12167 co-relation queries the response was YES. [2024-06-21 16:18:35,884 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. [2024-06-21 16:18:35,892 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 66 selfloop transitions, 14 changer transitions 0/87 dead transitions. [2024-06-21 16:18:35,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 87 transitions, 568 flow [2024-06-21 16:18:35,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:18:35,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:18:35,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-21 16:18:35,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4750830564784053 [2024-06-21 16:18:35,894 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 318 flow. Second operand 7 states and 143 transitions. [2024-06-21 16:18:35,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 87 transitions, 568 flow [2024-06-21 16:18:35,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 87 transitions, 526 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 16:18:35,901 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 344 flow [2024-06-21 16:18:35,901 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} [2024-06-21 16:18:35,902 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 21 predicate places. [2024-06-21 16:18:35,902 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 344 flow [2024-06-21 16:18:35,902 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) [2024-06-21 16:18:35,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:35,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:35,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 16:18:35,903 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:18:35,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:35,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1465657458, now seen corresponding path program 1 times [2024-06-21 16:18:35,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:35,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624754326] [2024-06-21 16:18:35,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:35,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:35,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:36,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:36,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:36,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624754326] [2024-06-21 16:18:36,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624754326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:36,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:36,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:18:36,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681250047] [2024-06-21 16:18:36,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:36,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:18:36,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:36,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:18:36,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:18:36,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:18:36,707 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) [2024-06-21 16:18:36,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:36,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:18:36,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:37,375 INFO L124 PetriNetUnfolderBase]: 1833/2763 cut-off events. [2024-06-21 16:18:37,375 INFO L125 PetriNetUnfolderBase]: For 15115/15121 co-relation queries the response was YES. [2024-06-21 16:18:37,381 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. [2024-06-21 16:18:37,389 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 64 selfloop transitions, 23 changer transitions 0/92 dead transitions. [2024-06-21 16:18:37,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 92 transitions, 666 flow [2024-06-21 16:18:37,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:18:37,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:18:37,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-21 16:18:37,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-21 16:18:37,391 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 344 flow. Second operand 7 states and 140 transitions. [2024-06-21 16:18:37,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 92 transitions, 666 flow [2024-06-21 16:18:37,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 92 transitions, 622 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 16:18:37,397 INFO L231 Difference]: Finished difference. Result has 67 places, 68 transitions, 412 flow [2024-06-21 16:18:37,397 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} [2024-06-21 16:18:37,397 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 23 predicate places. [2024-06-21 16:18:37,398 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 68 transitions, 412 flow [2024-06-21 16:18:37,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:37,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:37,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:37,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 16:18:37,398 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:18:37,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:37,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1465657644, now seen corresponding path program 2 times [2024-06-21 16:18:37,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:37,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701081138] [2024-06-21 16:18:37,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:37,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:37,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:38,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:38,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:38,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701081138] [2024-06-21 16:18:38,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701081138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:38,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:38,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:18:38,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28864857] [2024-06-21 16:18:38,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:38,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:18:38,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:38,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:18:38,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:18:38,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:18:38,114 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) [2024-06-21 16:18:38,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:38,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:18:38,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:38,641 INFO L124 PetriNetUnfolderBase]: 1739/2682 cut-off events. [2024-06-21 16:18:38,641 INFO L125 PetriNetUnfolderBase]: For 18580/18583 co-relation queries the response was YES. [2024-06-21 16:18:38,645 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. [2024-06-21 16:18:38,653 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 63 selfloop transitions, 26 changer transitions 0/98 dead transitions. [2024-06-21 16:18:38,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 98 transitions, 758 flow [2024-06-21 16:18:38,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:18:38,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:18:38,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-21 16:18:38,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4850498338870432 [2024-06-21 16:18:38,654 INFO L175 Difference]: Start difference. First operand has 67 places, 68 transitions, 412 flow. Second operand 7 states and 146 transitions. [2024-06-21 16:18:38,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 98 transitions, 758 flow [2024-06-21 16:18:38,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 98 transitions, 724 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-21 16:18:38,661 INFO L231 Difference]: Finished difference. Result has 71 places, 74 transitions, 512 flow [2024-06-21 16:18:38,661 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} [2024-06-21 16:18:38,662 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 27 predicate places. [2024-06-21 16:18:38,662 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 74 transitions, 512 flow [2024-06-21 16:18:38,662 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) [2024-06-21 16:18:38,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:38,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:38,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 16:18:38,663 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:18:38,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:38,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1053965498, now seen corresponding path program 2 times [2024-06-21 16:18:38,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:38,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393741653] [2024-06-21 16:18:38,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:38,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:38,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:39,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:39,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:39,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393741653] [2024-06-21 16:18:39,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393741653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:39,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:39,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:18:39,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898132352] [2024-06-21 16:18:39,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:39,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:18:39,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:39,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:18:39,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:18:39,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:18:39,338 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) [2024-06-21 16:18:39,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:39,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:18:39,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:39,890 INFO L124 PetriNetUnfolderBase]: 1855/2804 cut-off events. [2024-06-21 16:18:39,890 INFO L125 PetriNetUnfolderBase]: For 22808/22813 co-relation queries the response was YES. [2024-06-21 16:18:39,896 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. [2024-06-21 16:18:39,904 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 66 selfloop transitions, 27 changer transitions 0/98 dead transitions. [2024-06-21 16:18:39,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 98 transitions, 826 flow [2024-06-21 16:18:39,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:18:39,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:18:39,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-21 16:18:39,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-21 16:18:39,906 INFO L175 Difference]: Start difference. First operand has 71 places, 74 transitions, 512 flow. Second operand 7 states and 136 transitions. [2024-06-21 16:18:39,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 98 transitions, 826 flow [2024-06-21 16:18:39,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 98 transitions, 782 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-21 16:18:39,916 INFO L231 Difference]: Finished difference. Result has 75 places, 77 transitions, 562 flow [2024-06-21 16:18:39,917 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} [2024-06-21 16:18:39,917 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 31 predicate places. [2024-06-21 16:18:39,917 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 77 transitions, 562 flow [2024-06-21 16:18:39,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:39,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:39,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:39,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 16:18:39,918 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:18:39,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:39,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1292688460, now seen corresponding path program 3 times [2024-06-21 16:18:39,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:39,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49001395] [2024-06-21 16:18:39,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:39,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:39,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:40,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:40,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:40,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49001395] [2024-06-21 16:18:40,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49001395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:40,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:40,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:18:40,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824968910] [2024-06-21 16:18:40,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:40,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:18:40,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:40,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:18:40,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:18:40,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:18:40,633 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) [2024-06-21 16:18:40,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:40,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:18:40,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:41,153 INFO L124 PetriNetUnfolderBase]: 1850/2797 cut-off events. [2024-06-21 16:18:41,153 INFO L125 PetriNetUnfolderBase]: For 25542/25547 co-relation queries the response was YES. [2024-06-21 16:18:41,158 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. [2024-06-21 16:18:41,165 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 65 selfloop transitions, 26 changer transitions 0/96 dead transitions. [2024-06-21 16:18:41,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 96 transitions, 792 flow [2024-06-21 16:18:41,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:18:41,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:18:41,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-21 16:18:41,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4485049833887043 [2024-06-21 16:18:41,167 INFO L175 Difference]: Start difference. First operand has 75 places, 77 transitions, 562 flow. Second operand 7 states and 135 transitions. [2024-06-21 16:18:41,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 96 transitions, 792 flow [2024-06-21 16:18:41,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 96 transitions, 714 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-21 16:18:41,179 INFO L231 Difference]: Finished difference. Result has 78 places, 77 transitions, 544 flow [2024-06-21 16:18:41,179 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} [2024-06-21 16:18:41,180 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 34 predicate places. [2024-06-21 16:18:41,180 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 77 transitions, 544 flow [2024-06-21 16:18:41,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:41,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:41,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:41,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 16:18:41,180 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:18:41,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:41,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1288526124, now seen corresponding path program 3 times [2024-06-21 16:18:41,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:41,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125194166] [2024-06-21 16:18:41,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:41,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:41,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:41,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:41,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:41,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125194166] [2024-06-21 16:18:41,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125194166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:41,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:41,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:18:41,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417401648] [2024-06-21 16:18:41,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:41,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:18:41,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:41,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:18:41,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:18:41,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:18:41,847 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) [2024-06-21 16:18:41,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:41,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:18:41,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:42,421 INFO L124 PetriNetUnfolderBase]: 1741/2681 cut-off events. [2024-06-21 16:18:42,421 INFO L125 PetriNetUnfolderBase]: For 28404/28404 co-relation queries the response was YES. [2024-06-21 16:18:42,428 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. [2024-06-21 16:18:42,437 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 60 selfloop transitions, 26 changer transitions 0/96 dead transitions. [2024-06-21 16:18:42,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 96 transitions, 764 flow [2024-06-21 16:18:42,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:18:42,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:18:42,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-21 16:18:42,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4684385382059801 [2024-06-21 16:18:42,439 INFO L175 Difference]: Start difference. First operand has 78 places, 77 transitions, 544 flow. Second operand 7 states and 141 transitions. [2024-06-21 16:18:42,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 96 transitions, 764 flow [2024-06-21 16:18:42,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 96 transitions, 672 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 16:18:42,452 INFO L231 Difference]: Finished difference. Result has 78 places, 77 transitions, 512 flow [2024-06-21 16:18:42,452 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} [2024-06-21 16:18:42,453 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 34 predicate places. [2024-06-21 16:18:42,453 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 77 transitions, 512 flow [2024-06-21 16:18:42,453 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) [2024-06-21 16:18:42,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:42,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:42,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 16:18:42,454 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:18:42,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:42,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1931356471, now seen corresponding path program 1 times [2024-06-21 16:18:42,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:42,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430274264] [2024-06-21 16:18:42,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:42,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:42,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:43,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:43,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:43,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430274264] [2024-06-21 16:18:43,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430274264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:43,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:43,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:18:43,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732866203] [2024-06-21 16:18:43,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:43,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:18:43,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:43,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:18:43,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:18:43,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-21 16:18:43,137 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) [2024-06-21 16:18:43,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:43,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-21 16:18:43,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:43,437 INFO L124 PetriNetUnfolderBase]: 1387/2313 cut-off events. [2024-06-21 16:18:43,437 INFO L125 PetriNetUnfolderBase]: For 26173/26173 co-relation queries the response was YES. [2024-06-21 16:18:43,442 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. [2024-06-21 16:18:43,449 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 62 selfloop transitions, 8 changer transitions 0/88 dead transitions. [2024-06-21 16:18:43,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 88 transitions, 692 flow [2024-06-21 16:18:43,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:18:43,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:18:43,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 105 transitions. [2024-06-21 16:18:43,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-21 16:18:43,450 INFO L175 Difference]: Start difference. First operand has 78 places, 77 transitions, 512 flow. Second operand 5 states and 105 transitions. [2024-06-21 16:18:43,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 88 transitions, 692 flow [2024-06-21 16:18:43,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 88 transitions, 622 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 16:18:43,463 INFO L231 Difference]: Finished difference. Result has 77 places, 80 transitions, 490 flow [2024-06-21 16:18:43,464 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} [2024-06-21 16:18:43,464 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 33 predicate places. [2024-06-21 16:18:43,464 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 80 transitions, 490 flow [2024-06-21 16:18:43,464 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) [2024-06-21 16:18:43,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:43,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:43,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 16:18:43,465 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:18:43,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:43,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1805535858, now seen corresponding path program 1 times [2024-06-21 16:18:43,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:43,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42653727] [2024-06-21 16:18:43,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:43,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:43,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:44,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:44,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:44,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42653727] [2024-06-21 16:18:44,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42653727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:44,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:44,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:18:44,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068555953] [2024-06-21 16:18:44,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:44,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:18:44,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:44,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:18:44,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:18:44,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:18:44,325 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) [2024-06-21 16:18:44,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:44,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:18:44,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:44,936 INFO L124 PetriNetUnfolderBase]: 1853/2801 cut-off events. [2024-06-21 16:18:44,936 INFO L125 PetriNetUnfolderBase]: For 34417/34417 co-relation queries the response was YES. [2024-06-21 16:18:44,942 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. [2024-06-21 16:18:44,950 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 90 selfloop transitions, 17 changer transitions 0/112 dead transitions. [2024-06-21 16:18:44,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 112 transitions, 814 flow [2024-06-21 16:18:44,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:18:44,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:18:44,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 16:18:44,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-21 16:18:44,953 INFO L175 Difference]: Start difference. First operand has 77 places, 80 transitions, 490 flow. Second operand 8 states and 154 transitions. [2024-06-21 16:18:44,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 112 transitions, 814 flow [2024-06-21 16:18:44,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 112 transitions, 788 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 16:18:44,967 INFO L231 Difference]: Finished difference. Result has 82 places, 83 transitions, 548 flow [2024-06-21 16:18:44,967 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} [2024-06-21 16:18:44,967 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 38 predicate places. [2024-06-21 16:18:44,967 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 83 transitions, 548 flow [2024-06-21 16:18:44,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:44,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:44,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:44,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 16:18:44,976 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:18:44,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:44,977 INFO L85 PathProgramCache]: Analyzing trace with hash 549477099, now seen corresponding path program 1 times [2024-06-21 16:18:44,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:44,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847992670] [2024-06-21 16:18:44,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:44,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:44,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:45,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:45,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:45,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847992670] [2024-06-21 16:18:45,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847992670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:45,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:45,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:18:45,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879464616] [2024-06-21 16:18:45,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:45,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:18:45,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:45,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:18:45,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:18:45,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:18:45,879 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) [2024-06-21 16:18:45,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:45,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:18:45,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:46,595 INFO L124 PetriNetUnfolderBase]: 1875/2840 cut-off events. [2024-06-21 16:18:46,595 INFO L125 PetriNetUnfolderBase]: For 39678/39684 co-relation queries the response was YES. [2024-06-21 16:18:46,600 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. [2024-06-21 16:18:46,606 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 83 selfloop transitions, 32 changer transitions 0/120 dead transitions. [2024-06-21 16:18:46,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 120 transitions, 984 flow [2024-06-21 16:18:46,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:18:46,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:18:46,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-21 16:18:46,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47093023255813954 [2024-06-21 16:18:46,608 INFO L175 Difference]: Start difference. First operand has 82 places, 83 transitions, 548 flow. Second operand 8 states and 162 transitions. [2024-06-21 16:18:46,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 120 transitions, 984 flow [2024-06-21 16:18:46,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 120 transitions, 924 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 16:18:46,620 INFO L231 Difference]: Finished difference. Result has 84 places, 89 transitions, 634 flow [2024-06-21 16:18:46,620 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} [2024-06-21 16:18:46,620 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 40 predicate places. [2024-06-21 16:18:46,620 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 89 transitions, 634 flow [2024-06-21 16:18:46,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:46,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:46,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:46,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 16:18:46,621 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:18:46,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:46,621 INFO L85 PathProgramCache]: Analyzing trace with hash 549476882, now seen corresponding path program 2 times [2024-06-21 16:18:46,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:46,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115735708] [2024-06-21 16:18:46,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:46,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:46,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:47,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:47,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:47,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115735708] [2024-06-21 16:18:47,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115735708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:47,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:47,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:18:47,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968680064] [2024-06-21 16:18:47,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:47,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:18:47,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:47,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:18:47,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:18:47,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:18:47,454 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) [2024-06-21 16:18:47,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:47,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:18:47,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:48,144 INFO L124 PetriNetUnfolderBase]: 1902/2888 cut-off events. [2024-06-21 16:18:48,144 INFO L125 PetriNetUnfolderBase]: For 45740/45743 co-relation queries the response was YES. [2024-06-21 16:18:48,150 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. [2024-06-21 16:18:48,158 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 79 selfloop transitions, 44 changer transitions 0/128 dead transitions. [2024-06-21 16:18:48,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 128 transitions, 1218 flow [2024-06-21 16:18:48,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:18:48,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:18:48,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-21 16:18:48,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47093023255813954 [2024-06-21 16:18:48,160 INFO L175 Difference]: Start difference. First operand has 84 places, 89 transitions, 634 flow. Second operand 8 states and 162 transitions. [2024-06-21 16:18:48,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 128 transitions, 1218 flow [2024-06-21 16:18:48,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 128 transitions, 1170 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-21 16:18:48,180 INFO L231 Difference]: Finished difference. Result has 88 places, 98 transitions, 820 flow [2024-06-21 16:18:48,180 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} [2024-06-21 16:18:48,180 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 44 predicate places. [2024-06-21 16:18:48,180 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 98 transitions, 820 flow [2024-06-21 16:18:48,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:48,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:48,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:48,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 16:18:48,181 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:18:48,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:48,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1809254928, now seen corresponding path program 3 times [2024-06-21 16:18:48,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:48,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847132336] [2024-06-21 16:18:48,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:48,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:48,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:49,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:49,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:49,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847132336] [2024-06-21 16:18:49,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847132336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:49,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:49,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:18:49,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11427606] [2024-06-21 16:18:49,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:49,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:18:49,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:49,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:18:49,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:18:49,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:18:49,144 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) [2024-06-21 16:18:49,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:49,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:18:49,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:49,825 INFO L124 PetriNetUnfolderBase]: 1897/2881 cut-off events. [2024-06-21 16:18:49,825 INFO L125 PetriNetUnfolderBase]: For 51416/51419 co-relation queries the response was YES. [2024-06-21 16:18:49,831 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. [2024-06-21 16:18:49,840 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 78 selfloop transitions, 43 changer transitions 0/126 dead transitions. [2024-06-21 16:18:49,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 126 transitions, 1202 flow [2024-06-21 16:18:49,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:18:49,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:18:49,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-21 16:18:49,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680232558139535 [2024-06-21 16:18:49,843 INFO L175 Difference]: Start difference. First operand has 88 places, 98 transitions, 820 flow. Second operand 8 states and 161 transitions. [2024-06-21 16:18:49,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 126 transitions, 1202 flow [2024-06-21 16:18:49,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 126 transitions, 1118 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-21 16:18:49,867 INFO L231 Difference]: Finished difference. Result has 93 places, 98 transitions, 830 flow [2024-06-21 16:18:49,868 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} [2024-06-21 16:18:49,868 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 49 predicate places. [2024-06-21 16:18:49,868 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 98 transitions, 830 flow [2024-06-21 16:18:49,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:49,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:49,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:49,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 16:18:49,869 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:18:49,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:49,869 INFO L85 PathProgramCache]: Analyzing trace with hash 239540132, now seen corresponding path program 4 times [2024-06-21 16:18:49,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:49,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422991010] [2024-06-21 16:18:49,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:49,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:49,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:50,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:50,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:50,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422991010] [2024-06-21 16:18:50,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422991010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:50,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:50,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:18:50,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44581962] [2024-06-21 16:18:50,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:50,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:18:50,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:50,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:18:50,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:18:50,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:18:50,729 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) [2024-06-21 16:18:50,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:50,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:18:50,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:51,452 INFO L124 PetriNetUnfolderBase]: 1924/2922 cut-off events. [2024-06-21 16:18:51,452 INFO L125 PetriNetUnfolderBase]: For 56958/56958 co-relation queries the response was YES. [2024-06-21 16:18:51,458 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. [2024-06-21 16:18:51,466 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 77 selfloop transitions, 49 changer transitions 0/131 dead transitions. [2024-06-21 16:18:51,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 131 transitions, 1408 flow [2024-06-21 16:18:51,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:18:51,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:18:51,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 16:18:51,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-21 16:18:51,467 INFO L175 Difference]: Start difference. First operand has 93 places, 98 transitions, 830 flow. Second operand 8 states and 160 transitions. [2024-06-21 16:18:51,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 131 transitions, 1408 flow [2024-06-21 16:18:51,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 131 transitions, 1290 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 16:18:51,491 INFO L231 Difference]: Finished difference. Result has 94 places, 104 transitions, 930 flow [2024-06-21 16:18:51,491 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} [2024-06-21 16:18:51,492 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 50 predicate places. [2024-06-21 16:18:51,492 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 104 transitions, 930 flow [2024-06-21 16:18:51,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:51,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:51,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:51,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 16:18:51,492 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:18:51,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:51,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1289596747, now seen corresponding path program 2 times [2024-06-21 16:18:51,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:51,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385545829] [2024-06-21 16:18:51,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:51,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:51,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:52,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:52,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:52,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385545829] [2024-06-21 16:18:52,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385545829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:52,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:52,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:18:52,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756675952] [2024-06-21 16:18:52,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:52,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:18:52,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:52,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:18:52,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:18:52,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:18:52,379 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) [2024-06-21 16:18:52,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:52,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:18:52,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:53,029 INFO L124 PetriNetUnfolderBase]: 1946/2957 cut-off events. [2024-06-21 16:18:53,029 INFO L125 PetriNetUnfolderBase]: For 62290/62295 co-relation queries the response was YES. [2024-06-21 16:18:53,037 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. [2024-06-21 16:18:53,047 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 95 selfloop transitions, 35 changer transitions 0/135 dead transitions. [2024-06-21 16:18:53,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 135 transitions, 1376 flow [2024-06-21 16:18:53,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:18:53,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:18:53,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-21 16:18:53,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622093023255814 [2024-06-21 16:18:53,049 INFO L175 Difference]: Start difference. First operand has 94 places, 104 transitions, 930 flow. Second operand 8 states and 159 transitions. [2024-06-21 16:18:53,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 135 transitions, 1376 flow [2024-06-21 16:18:53,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 135 transitions, 1234 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 16:18:53,071 INFO L231 Difference]: Finished difference. Result has 97 places, 107 transitions, 906 flow [2024-06-21 16:18:53,071 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} [2024-06-21 16:18:53,071 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 53 predicate places. [2024-06-21 16:18:53,072 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 107 transitions, 906 flow [2024-06-21 16:18:53,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:53,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:53,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:53,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 16:18:53,072 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:18:53,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:53,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1411016369, now seen corresponding path program 3 times [2024-06-21 16:18:53,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:53,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989215688] [2024-06-21 16:18:53,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:53,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:53,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:53,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:53,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:53,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989215688] [2024-06-21 16:18:53,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989215688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:53,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:53,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:18:53,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900272608] [2024-06-21 16:18:53,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:53,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:18:53,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:53,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:18:53,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:18:53,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:18:53,961 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) [2024-06-21 16:18:53,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:53,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:18:53,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:54,624 INFO L124 PetriNetUnfolderBase]: 1968/2994 cut-off events. [2024-06-21 16:18:54,624 INFO L125 PetriNetUnfolderBase]: For 67460/67465 co-relation queries the response was YES. [2024-06-21 16:18:54,632 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. [2024-06-21 16:18:54,702 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 91 selfloop transitions, 41 changer transitions 0/137 dead transitions. [2024-06-21 16:18:54,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 137 transitions, 1364 flow [2024-06-21 16:18:54,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:18:54,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:18:54,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 16:18:54,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-21 16:18:54,704 INFO L175 Difference]: Start difference. First operand has 97 places, 107 transitions, 906 flow. Second operand 8 states and 156 transitions. [2024-06-21 16:18:54,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 137 transitions, 1364 flow [2024-06-21 16:18:54,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 137 transitions, 1256 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 16:18:54,728 INFO L231 Difference]: Finished difference. Result has 99 places, 110 transitions, 934 flow [2024-06-21 16:18:54,728 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} [2024-06-21 16:18:54,729 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 55 predicate places. [2024-06-21 16:18:54,729 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 110 transitions, 934 flow [2024-06-21 16:18:54,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:54,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:54,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:54,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 16:18:54,730 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:18:54,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:54,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1411283279, now seen corresponding path program 4 times [2024-06-21 16:18:54,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:54,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094428182] [2024-06-21 16:18:54,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:54,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:54,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:55,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:55,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:55,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094428182] [2024-06-21 16:18:55,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094428182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:55,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:55,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:18:55,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422049003] [2024-06-21 16:18:55,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:55,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:18:55,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:55,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:18:55,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:18:55,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:18:55,588 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) [2024-06-21 16:18:55,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:55,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:18:55,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:56,293 INFO L124 PetriNetUnfolderBase]: 1958/2980 cut-off events. [2024-06-21 16:18:56,293 INFO L125 PetriNetUnfolderBase]: For 71502/71507 co-relation queries the response was YES. [2024-06-21 16:18:56,300 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. [2024-06-21 16:18:56,309 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 92 selfloop transitions, 39 changer transitions 0/136 dead transitions. [2024-06-21 16:18:56,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 136 transitions, 1260 flow [2024-06-21 16:18:56,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:18:56,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:18:56,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 16:18:56,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-21 16:18:56,310 INFO L175 Difference]: Start difference. First operand has 99 places, 110 transitions, 934 flow. Second operand 8 states and 156 transitions. [2024-06-21 16:18:56,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 136 transitions, 1260 flow [2024-06-21 16:18:56,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 136 transitions, 1142 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-21 16:18:56,348 INFO L231 Difference]: Finished difference. Result has 102 places, 110 transitions, 902 flow [2024-06-21 16:18:56,348 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} [2024-06-21 16:18:56,349 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 58 predicate places. [2024-06-21 16:18:56,349 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 110 transitions, 902 flow [2024-06-21 16:18:56,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:56,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:56,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:56,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 16:18:56,349 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:18:56,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:56,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1418640726, now seen corresponding path program 5 times [2024-06-21 16:18:56,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:56,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594974017] [2024-06-21 16:18:56,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:56,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:56,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:57,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:57,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:57,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594974017] [2024-06-21 16:18:57,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594974017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:57,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:57,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:18:57,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113656909] [2024-06-21 16:18:57,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:57,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:18:57,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:57,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:18:57,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:18:57,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:18:57,222 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) [2024-06-21 16:18:57,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:57,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:18:57,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:57,891 INFO L124 PetriNetUnfolderBase]: 1953/2970 cut-off events. [2024-06-21 16:18:57,891 INFO L125 PetriNetUnfolderBase]: For 75673/75673 co-relation queries the response was YES. [2024-06-21 16:18:57,898 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. [2024-06-21 16:18:57,907 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 80 selfloop transitions, 50 changer transitions 0/135 dead transitions. [2024-06-21 16:18:57,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 135 transitions, 1314 flow [2024-06-21 16:18:57,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:18:57,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:18:57,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-21 16:18:57,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-21 16:18:57,909 INFO L175 Difference]: Start difference. First operand has 102 places, 110 transitions, 902 flow. Second operand 8 states and 157 transitions. [2024-06-21 16:18:57,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 135 transitions, 1314 flow [2024-06-21 16:18:57,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 135 transitions, 1184 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-21 16:18:57,945 INFO L231 Difference]: Finished difference. Result has 102 places, 110 transitions, 880 flow [2024-06-21 16:18:57,945 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} [2024-06-21 16:18:57,945 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 58 predicate places. [2024-06-21 16:18:57,945 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 110 transitions, 880 flow [2024-06-21 16:18:57,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:57,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:57,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:57,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 16:18:57,946 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:18:57,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:57,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1411283496, now seen corresponding path program 6 times [2024-06-21 16:18:57,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:57,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515403647] [2024-06-21 16:18:57,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:57,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:57,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:58,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:58,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:58,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515403647] [2024-06-21 16:18:58,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515403647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:58,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:58,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:18:58,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866403273] [2024-06-21 16:18:58,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:58,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:18:58,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:58,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:18:58,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:18:58,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:18:58,751 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) [2024-06-21 16:18:58,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:58,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:18:58,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:59,537 INFO L124 PetriNetUnfolderBase]: 1948/2968 cut-off events. [2024-06-21 16:18:59,538 INFO L125 PetriNetUnfolderBase]: For 80663/80663 co-relation queries the response was YES. [2024-06-21 16:18:59,545 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. [2024-06-21 16:18:59,553 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 76 selfloop transitions, 52 changer transitions 0/133 dead transitions. [2024-06-21 16:18:59,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 133 transitions, 1194 flow [2024-06-21 16:18:59,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:18:59,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:18:59,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 16:18:59,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-21 16:18:59,555 INFO L175 Difference]: Start difference. First operand has 102 places, 110 transitions, 880 flow. Second operand 8 states and 154 transitions. [2024-06-21 16:18:59,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 133 transitions, 1194 flow [2024-06-21 16:18:59,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 133 transitions, 1062 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-21 16:18:59,592 INFO L231 Difference]: Finished difference. Result has 104 places, 110 transitions, 860 flow [2024-06-21 16:18:59,592 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} [2024-06-21 16:18:59,593 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 60 predicate places. [2024-06-21 16:18:59,593 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 110 transitions, 860 flow [2024-06-21 16:18:59,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:59,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:59,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:59,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 16:18:59,594 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)] === [2024-06-21 16:18:59,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:59,594 INFO L85 PathProgramCache]: Analyzing trace with hash -257489989, now seen corresponding path program 1 times [2024-06-21 16:18:59,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:59,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39147855] [2024-06-21 16:18:59,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:59,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:59,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:00,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:00,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:00,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39147855] [2024-06-21 16:19:00,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39147855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:00,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:00,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:19:00,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684769914] [2024-06-21 16:19:00,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:00,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:19:00,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:00,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:19:00,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:19:00,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-21 16:19:00,529 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) [2024-06-21 16:19:00,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:00,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-21 16:19:00,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:00,869 INFO L124 PetriNetUnfolderBase]: 1465/2467 cut-off events. [2024-06-21 16:19:00,869 INFO L125 PetriNetUnfolderBase]: For 71923/71923 co-relation queries the response was YES. [2024-06-21 16:19:00,888 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. [2024-06-21 16:19:00,896 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 84 selfloop transitions, 11 changer transitions 0/123 dead transitions. [2024-06-21 16:19:00,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 123 transitions, 1098 flow [2024-06-21 16:19:00,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:19:00,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:19:00,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-21 16:19:00,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-21 16:19:00,897 INFO L175 Difference]: Start difference. First operand has 104 places, 110 transitions, 860 flow. Second operand 6 states and 123 transitions. [2024-06-21 16:19:00,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 123 transitions, 1098 flow [2024-06-21 16:19:00,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 123 transitions, 970 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 16:19:00,926 INFO L231 Difference]: Finished difference. Result has 102 places, 113 transitions, 790 flow [2024-06-21 16:19:00,927 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} [2024-06-21 16:19:00,927 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 58 predicate places. [2024-06-21 16:19:00,927 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 113 transitions, 790 flow [2024-06-21 16:19:00,928 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) [2024-06-21 16:19:00,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:00,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:00,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 16:19:00,928 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:19:00,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:00,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1378799503, now seen corresponding path program 1 times [2024-06-21 16:19:00,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:00,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547157502] [2024-06-21 16:19:00,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:00,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:00,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:01,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:01,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:01,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547157502] [2024-06-21 16:19:01,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547157502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:01,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:01,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:19:01,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918535075] [2024-06-21 16:19:01,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:01,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:19:01,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:01,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:19:01,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:19:01,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:19:01,867 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) [2024-06-21 16:19:01,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:01,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:19:01,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:02,483 INFO L124 PetriNetUnfolderBase]: 1882/2920 cut-off events. [2024-06-21 16:19:02,483 INFO L125 PetriNetUnfolderBase]: For 92318/92318 co-relation queries the response was YES. [2024-06-21 16:19:02,491 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. [2024-06-21 16:19:02,501 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 118 selfloop transitions, 20 changer transitions 0/154 dead transitions. [2024-06-21 16:19:02,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 154 transitions, 1334 flow [2024-06-21 16:19:02,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:19:02,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:19:02,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-21 16:19:02,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4702842377260982 [2024-06-21 16:19:02,502 INFO L175 Difference]: Start difference. First operand has 102 places, 113 transitions, 790 flow. Second operand 9 states and 182 transitions. [2024-06-21 16:19:02,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 154 transitions, 1334 flow [2024-06-21 16:19:02,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 154 transitions, 1298 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 16:19:02,552 INFO L231 Difference]: Finished difference. Result has 107 places, 117 transitions, 881 flow [2024-06-21 16:19:02,552 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} [2024-06-21 16:19:02,553 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 63 predicate places. [2024-06-21 16:19:02,553 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 117 transitions, 881 flow [2024-06-21 16:19:02,553 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) [2024-06-21 16:19:02,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:02,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:02,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 16:19:02,553 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:19:02,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:02,554 INFO L85 PathProgramCache]: Analyzing trace with hash 247855977, now seen corresponding path program 2 times [2024-06-21 16:19:02,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:02,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836282973] [2024-06-21 16:19:02,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:02,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:02,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:03,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:03,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:03,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836282973] [2024-06-21 16:19:03,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836282973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:03,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:03,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:19:03,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083530339] [2024-06-21 16:19:03,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:03,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:19:03,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:03,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:19:03,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:19:03,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:19:03,532 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) [2024-06-21 16:19:03,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:03,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:19:03,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:04,060 INFO L124 PetriNetUnfolderBase]: 1874/2908 cut-off events. [2024-06-21 16:19:04,060 INFO L125 PetriNetUnfolderBase]: For 98335/98335 co-relation queries the response was YES. [2024-06-21 16:19:04,068 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. [2024-06-21 16:19:04,092 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 115 selfloop transitions, 16 changer transitions 0/147 dead transitions. [2024-06-21 16:19:04,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 147 transitions, 1219 flow [2024-06-21 16:19:04,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:19:04,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:19:04,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-21 16:19:04,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680232558139535 [2024-06-21 16:19:04,094 INFO L175 Difference]: Start difference. First operand has 107 places, 117 transitions, 881 flow. Second operand 8 states and 161 transitions. [2024-06-21 16:19:04,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 147 transitions, 1219 flow [2024-06-21 16:19:04,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 147 transitions, 1135 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-21 16:19:04,145 INFO L231 Difference]: Finished difference. Result has 110 places, 117 transitions, 836 flow [2024-06-21 16:19:04,146 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} [2024-06-21 16:19:04,150 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 66 predicate places. [2024-06-21 16:19:04,150 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 117 transitions, 836 flow [2024-06-21 16:19:04,150 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) [2024-06-21 16:19:04,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:04,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:04,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 16:19:04,151 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:19:04,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:04,151 INFO L85 PathProgramCache]: Analyzing trace with hash 137038417, now seen corresponding path program 1 times [2024-06-21 16:19:04,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:04,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862733788] [2024-06-21 16:19:04,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:04,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:04,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:04,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:04,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:04,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862733788] [2024-06-21 16:19:04,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862733788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:04,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:04,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:19:04,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999730205] [2024-06-21 16:19:04,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:04,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:19:04,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:04,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:19:04,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:19:05,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:19:05,102 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) [2024-06-21 16:19:05,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:05,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:19:05,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:05,717 INFO L124 PetriNetUnfolderBase]: 1995/3051 cut-off events. [2024-06-21 16:19:05,717 INFO L125 PetriNetUnfolderBase]: For 106469/106469 co-relation queries the response was YES. [2024-06-21 16:19:05,726 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. [2024-06-21 16:19:05,736 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 129 selfloop transitions, 20 changer transitions 0/154 dead transitions. [2024-06-21 16:19:05,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 154 transitions, 1268 flow [2024-06-21 16:19:05,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:19:05,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:19:05,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 16:19:05,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 16:19:05,738 INFO L175 Difference]: Start difference. First operand has 110 places, 117 transitions, 836 flow. Second operand 9 states and 172 transitions. [2024-06-21 16:19:05,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 154 transitions, 1268 flow [2024-06-21 16:19:05,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 154 transitions, 1231 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 16:19:05,778 INFO L231 Difference]: Finished difference. Result has 112 places, 120 transitions, 901 flow [2024-06-21 16:19:05,778 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} [2024-06-21 16:19:05,779 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 68 predicate places. [2024-06-21 16:19:05,779 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 120 transitions, 901 flow [2024-06-21 16:19:05,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:05,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:05,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:05,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 16:19:05,780 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:19:05,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:05,780 INFO L85 PathProgramCache]: Analyzing trace with hash -146262115, now seen corresponding path program 3 times [2024-06-21 16:19:05,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:05,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881906238] [2024-06-21 16:19:05,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:05,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:05,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:06,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:06,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:06,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881906238] [2024-06-21 16:19:06,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881906238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:06,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:06,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:19:06,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269122828] [2024-06-21 16:19:06,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:06,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:19:06,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:06,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:19:06,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:19:06,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:19:06,614 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) [2024-06-21 16:19:06,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:06,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:19:06,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:07,290 INFO L124 PetriNetUnfolderBase]: 1913/2978 cut-off events. [2024-06-21 16:19:07,290 INFO L125 PetriNetUnfolderBase]: For 114023/114026 co-relation queries the response was YES. [2024-06-21 16:19:07,300 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. [2024-06-21 16:19:07,310 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 105 selfloop transitions, 28 changer transitions 0/149 dead transitions. [2024-06-21 16:19:07,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 149 transitions, 1279 flow [2024-06-21 16:19:07,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:19:07,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:19:07,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-21 16:19:07,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47093023255813954 [2024-06-21 16:19:07,328 INFO L175 Difference]: Start difference. First operand has 112 places, 120 transitions, 901 flow. Second operand 8 states and 162 transitions. [2024-06-21 16:19:07,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 149 transitions, 1279 flow [2024-06-21 16:19:07,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 149 transitions, 1201 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-21 16:19:07,379 INFO L231 Difference]: Finished difference. Result has 113 places, 122 transitions, 934 flow [2024-06-21 16:19:07,379 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} [2024-06-21 16:19:07,379 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 69 predicate places. [2024-06-21 16:19:07,380 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 122 transitions, 934 flow [2024-06-21 16:19:07,380 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) [2024-06-21 16:19:07,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:07,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:07,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 16:19:07,380 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:19:07,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:07,381 INFO L85 PathProgramCache]: Analyzing trace with hash 252509077, now seen corresponding path program 2 times [2024-06-21 16:19:07,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:07,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009271407] [2024-06-21 16:19:07,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:07,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:07,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:08,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:08,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:08,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009271407] [2024-06-21 16:19:08,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009271407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:08,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:08,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:19:08,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107583485] [2024-06-21 16:19:08,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:08,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:19:08,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:08,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:19:08,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:19:08,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:19:08,357 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) [2024-06-21 16:19:08,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:08,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:19:08,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:09,191 INFO L124 PetriNetUnfolderBase]: 2066/3165 cut-off events. [2024-06-21 16:19:09,191 INFO L125 PetriNetUnfolderBase]: For 126089/126092 co-relation queries the response was YES. [2024-06-21 16:19:09,200 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. [2024-06-21 16:19:09,209 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 97 selfloop transitions, 67 changer transitions 0/169 dead transitions. [2024-06-21 16:19:09,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 169 transitions, 1754 flow [2024-06-21 16:19:09,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:19:09,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:19:09,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-21 16:19:09,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4806201550387597 [2024-06-21 16:19:09,211 INFO L175 Difference]: Start difference. First operand has 113 places, 122 transitions, 934 flow. Second operand 9 states and 186 transitions. [2024-06-21 16:19:09,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 169 transitions, 1754 flow [2024-06-21 16:19:09,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 169 transitions, 1661 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-21 16:19:09,254 INFO L231 Difference]: Finished difference. Result has 116 places, 131 transitions, 1157 flow [2024-06-21 16:19:09,254 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} [2024-06-21 16:19:09,254 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 72 predicate places. [2024-06-21 16:19:09,255 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 131 transitions, 1157 flow [2024-06-21 16:19:09,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:09,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:09,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:09,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 16:19:09,255 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:19:09,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:09,256 INFO L85 PathProgramCache]: Analyzing trace with hash -146084175, now seen corresponding path program 3 times [2024-06-21 16:19:09,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:09,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297071814] [2024-06-21 16:19:09,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:09,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:09,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:10,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:10,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:10,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297071814] [2024-06-21 16:19:10,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297071814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:10,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:10,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:19:10,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996571737] [2024-06-21 16:19:10,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:10,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:19:10,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:10,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:19:10,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:19:10,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:19:10,162 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) [2024-06-21 16:19:10,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:10,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:19:10,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:11,035 INFO L124 PetriNetUnfolderBase]: 2088/3202 cut-off events. [2024-06-21 16:19:11,036 INFO L125 PetriNetUnfolderBase]: For 136091/136094 co-relation queries the response was YES. [2024-06-21 16:19:11,045 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. [2024-06-21 16:19:11,056 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 100 selfloop transitions, 68 changer transitions 0/173 dead transitions. [2024-06-21 16:19:11,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 173 transitions, 1889 flow [2024-06-21 16:19:11,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:19:11,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:19:11,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-21 16:19:11,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48578811369509045 [2024-06-21 16:19:11,058 INFO L175 Difference]: Start difference. First operand has 116 places, 131 transitions, 1157 flow. Second operand 9 states and 188 transitions. [2024-06-21 16:19:11,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 173 transitions, 1889 flow [2024-06-21 16:19:11,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 173 transitions, 1775 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-21 16:19:11,112 INFO L231 Difference]: Finished difference. Result has 121 places, 134 transitions, 1249 flow [2024-06-21 16:19:11,112 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} [2024-06-21 16:19:11,113 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 77 predicate places. [2024-06-21 16:19:11,113 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 134 transitions, 1249 flow [2024-06-21 16:19:11,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:11,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:11,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:11,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 16:19:11,113 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:19:11,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:11,114 INFO L85 PathProgramCache]: Analyzing trace with hash -146257155, now seen corresponding path program 4 times [2024-06-21 16:19:11,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:11,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358937959] [2024-06-21 16:19:11,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:11,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:11,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:11,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:11,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:11,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358937959] [2024-06-21 16:19:11,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358937959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:11,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:11,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:19:11,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333133111] [2024-06-21 16:19:11,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:11,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:19:11,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:11,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:19:11,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:19:11,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:19:11,957 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) [2024-06-21 16:19:11,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:11,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:19:11,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:12,686 INFO L124 PetriNetUnfolderBase]: 2078/3193 cut-off events. [2024-06-21 16:19:12,686 INFO L125 PetriNetUnfolderBase]: For 141048/141051 co-relation queries the response was YES. [2024-06-21 16:19:12,696 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. [2024-06-21 16:19:12,708 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 99 selfloop transitions, 67 changer transitions 0/171 dead transitions. [2024-06-21 16:19:12,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 171 transitions, 1795 flow [2024-06-21 16:19:12,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:19:12,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:19:12,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-21 16:19:12,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48320413436692505 [2024-06-21 16:19:12,710 INFO L175 Difference]: Start difference. First operand has 121 places, 134 transitions, 1249 flow. Second operand 9 states and 187 transitions. [2024-06-21 16:19:12,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 171 transitions, 1795 flow [2024-06-21 16:19:12,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 171 transitions, 1648 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-21 16:19:12,770 INFO L231 Difference]: Finished difference. Result has 125 places, 134 transitions, 1244 flow [2024-06-21 16:19:12,770 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} [2024-06-21 16:19:12,771 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 81 predicate places. [2024-06-21 16:19:12,771 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 134 transitions, 1244 flow [2024-06-21 16:19:12,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:12,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:12,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:12,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 16:19:12,771 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)] === [2024-06-21 16:19:12,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:12,772 INFO L85 PathProgramCache]: Analyzing trace with hash 594398166, now seen corresponding path program 1 times [2024-06-21 16:19:12,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:12,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132171421] [2024-06-21 16:19:12,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:12,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:12,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:13,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:13,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:13,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132171421] [2024-06-21 16:19:13,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132171421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:13,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:13,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:19:13,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010348153] [2024-06-21 16:19:13,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:13,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:19:13,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:13,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:19:13,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:19:13,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 16:19:13,418 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) [2024-06-21 16:19:13,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:13,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 16:19:13,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:13,879 INFO L124 PetriNetUnfolderBase]: 1796/2900 cut-off events. [2024-06-21 16:19:13,879 INFO L125 PetriNetUnfolderBase]: For 145808/145816 co-relation queries the response was YES. [2024-06-21 16:19:13,890 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. [2024-06-21 16:19:13,901 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 112 selfloop transitions, 13 changer transitions 0/152 dead transitions. [2024-06-21 16:19:13,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 152 transitions, 1564 flow [2024-06-21 16:19:13,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:19:13,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:19:13,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-21 16:19:13,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-21 16:19:13,903 INFO L175 Difference]: Start difference. First operand has 125 places, 134 transitions, 1244 flow. Second operand 6 states and 123 transitions. [2024-06-21 16:19:13,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 152 transitions, 1564 flow [2024-06-21 16:19:13,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 152 transitions, 1390 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-21 16:19:13,965 INFO L231 Difference]: Finished difference. Result has 122 places, 137 transitions, 1141 flow [2024-06-21 16:19:13,965 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} [2024-06-21 16:19:13,965 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 78 predicate places. [2024-06-21 16:19:13,966 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 137 transitions, 1141 flow [2024-06-21 16:19:13,966 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) [2024-06-21 16:19:13,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:13,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:13,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 16:19:13,966 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)] === [2024-06-21 16:19:13,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:13,967 INFO L85 PathProgramCache]: Analyzing trace with hash -109661163, now seen corresponding path program 4 times [2024-06-21 16:19:13,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:13,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015045993] [2024-06-21 16:19:13,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:13,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:13,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:14,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:14,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:14,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015045993] [2024-06-21 16:19:14,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015045993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:14,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:14,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:19:14,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754233780] [2024-06-21 16:19:14,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:14,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:19:14,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:14,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:19:14,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:19:14,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:19:14,734 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) [2024-06-21 16:19:14,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:14,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:19:14,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:15,433 INFO L124 PetriNetUnfolderBase]: 1969/3079 cut-off events. [2024-06-21 16:19:15,434 INFO L125 PetriNetUnfolderBase]: For 152410/152410 co-relation queries the response was YES. [2024-06-21 16:19:15,444 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. [2024-06-21 16:19:15,455 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 119 selfloop transitions, 28 changer transitions 0/163 dead transitions. [2024-06-21 16:19:15,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 163 transitions, 1545 flow [2024-06-21 16:19:15,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:19:15,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:19:15,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-21 16:19:15,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622093023255814 [2024-06-21 16:19:15,456 INFO L175 Difference]: Start difference. First operand has 122 places, 137 transitions, 1141 flow. Second operand 8 states and 159 transitions. [2024-06-21 16:19:15,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 163 transitions, 1545 flow [2024-06-21 16:19:15,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 163 transitions, 1498 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-21 16:19:15,525 INFO L231 Difference]: Finished difference. Result has 126 places, 139 transitions, 1211 flow [2024-06-21 16:19:15,525 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} [2024-06-21 16:19:15,526 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 82 predicate places. [2024-06-21 16:19:15,526 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 139 transitions, 1211 flow [2024-06-21 16:19:15,526 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) [2024-06-21 16:19:15,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:15,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:15,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 16:19:15,526 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:19:15,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:15,527 INFO L85 PathProgramCache]: Analyzing trace with hash 19554959, now seen corresponding path program 5 times [2024-06-21 16:19:15,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:15,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279400725] [2024-06-21 16:19:15,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:15,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:15,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:16,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:16,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:16,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279400725] [2024-06-21 16:19:16,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279400725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:16,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:16,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:19:16,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108979316] [2024-06-21 16:19:16,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:16,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:19:16,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:16,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:19:16,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:19:16,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:19:16,452 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) [2024-06-21 16:19:16,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:16,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:19:16,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:17,183 INFO L124 PetriNetUnfolderBase]: 2166/3338 cut-off events. [2024-06-21 16:19:17,184 INFO L125 PetriNetUnfolderBase]: For 170077/170077 co-relation queries the response was YES. [2024-06-21 16:19:17,196 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. [2024-06-21 16:19:17,208 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 105 selfloop transitions, 76 changer transitions 0/186 dead transitions. [2024-06-21 16:19:17,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 186 transitions, 2260 flow [2024-06-21 16:19:17,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:19:17,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:19:17,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-21 16:19:17,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48578811369509045 [2024-06-21 16:19:17,210 INFO L175 Difference]: Start difference. First operand has 126 places, 139 transitions, 1211 flow. Second operand 9 states and 188 transitions. [2024-06-21 16:19:17,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 186 transitions, 2260 flow [2024-06-21 16:19:17,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 186 transitions, 2161 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-21 16:19:17,277 INFO L231 Difference]: Finished difference. Result has 129 places, 148 transitions, 1467 flow [2024-06-21 16:19:17,278 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} [2024-06-21 16:19:17,278 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 85 predicate places. [2024-06-21 16:19:17,278 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 148 transitions, 1467 flow [2024-06-21 16:19:17,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:17,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:17,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:17,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 16:19:17,279 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:19:17,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:17,279 INFO L85 PathProgramCache]: Analyzing trace with hash -800107239, now seen corresponding path program 6 times [2024-06-21 16:19:17,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:17,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232111026] [2024-06-21 16:19:17,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:17,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:17,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:17,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:17,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:17,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232111026] [2024-06-21 16:19:17,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232111026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:17,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:17,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:19:17,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067721365] [2024-06-21 16:19:17,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:17,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:19:17,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:17,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:19:17,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:19:18,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:19:18,078 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) [2024-06-21 16:19:18,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:18,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:19:18,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:18,945 INFO L124 PetriNetUnfolderBase]: 2220/3431 cut-off events. [2024-06-21 16:19:18,945 INFO L125 PetriNetUnfolderBase]: For 184060/184060 co-relation queries the response was YES. [2024-06-21 16:19:18,957 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. [2024-06-21 16:19:18,970 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 101 selfloop transitions, 85 changer transitions 0/191 dead transitions. [2024-06-21 16:19:18,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 191 transitions, 2483 flow [2024-06-21 16:19:18,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:19:18,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:19:18,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-21 16:19:18,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4780361757105943 [2024-06-21 16:19:18,972 INFO L175 Difference]: Start difference. First operand has 129 places, 148 transitions, 1467 flow. Second operand 9 states and 185 transitions. [2024-06-21 16:19:18,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 191 transitions, 2483 flow [2024-06-21 16:19:19,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 191 transitions, 2201 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-21 16:19:19,054 INFO L231 Difference]: Finished difference. Result has 132 places, 154 transitions, 1505 flow [2024-06-21 16:19:19,054 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} [2024-06-21 16:19:19,055 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 88 predicate places. [2024-06-21 16:19:19,055 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 154 transitions, 1505 flow [2024-06-21 16:19:19,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:19,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:19,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:19,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 16:19:19,055 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:19:19,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:19,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1028008389, now seen corresponding path program 7 times [2024-06-21 16:19:19,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:19,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449233672] [2024-06-21 16:19:19,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:19,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:19,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:19,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:19,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:19,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449233672] [2024-06-21 16:19:19,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449233672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:19,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:19,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:19:19,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696767850] [2024-06-21 16:19:19,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:19,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:19:19,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:19,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:19:19,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:19:19,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:19:19,905 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) [2024-06-21 16:19:19,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:19,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:19:19,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:20,894 INFO L124 PetriNetUnfolderBase]: 2210/3417 cut-off events. [2024-06-21 16:19:20,894 INFO L125 PetriNetUnfolderBase]: For 187021/187021 co-relation queries the response was YES. [2024-06-21 16:19:20,907 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. [2024-06-21 16:19:20,920 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 101 selfloop transitions, 83 changer transitions 0/189 dead transitions. [2024-06-21 16:19:20,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 189 transitions, 2241 flow [2024-06-21 16:19:20,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:19:20,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:19:20,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-21 16:19:20,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4754521963824289 [2024-06-21 16:19:20,922 INFO L175 Difference]: Start difference. First operand has 132 places, 154 transitions, 1505 flow. Second operand 9 states and 184 transitions. [2024-06-21 16:19:20,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 189 transitions, 2241 flow [2024-06-21 16:19:21,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 189 transitions, 1973 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-21 16:19:21,014 INFO L231 Difference]: Finished difference. Result has 135 places, 154 transitions, 1411 flow [2024-06-21 16:19:21,015 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} [2024-06-21 16:19:21,015 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 91 predicate places. [2024-06-21 16:19:21,015 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 154 transitions, 1411 flow [2024-06-21 16:19:21,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:21,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:21,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:21,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 16:19:21,016 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:19:21,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:21,016 INFO L85 PathProgramCache]: Analyzing trace with hash -791833029, now seen corresponding path program 8 times [2024-06-21 16:19:21,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:21,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810311856] [2024-06-21 16:19:21,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:21,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:21,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:21,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:21,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:21,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810311856] [2024-06-21 16:19:21,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810311856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:21,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:21,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:19:21,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852332557] [2024-06-21 16:19:21,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:21,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:19:21,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:21,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:19:21,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:19:21,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:19:21,882 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) [2024-06-21 16:19:21,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:21,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:19:21,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:22,647 INFO L124 PetriNetUnfolderBase]: 2200/3403 cut-off events. [2024-06-21 16:19:22,647 INFO L125 PetriNetUnfolderBase]: For 191540/191540 co-relation queries the response was YES. [2024-06-21 16:19:22,665 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. [2024-06-21 16:19:22,679 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 89 selfloop transitions, 92 changer transitions 0/186 dead transitions. [2024-06-21 16:19:22,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 186 transitions, 1997 flow [2024-06-21 16:19:22,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:19:22,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:19:22,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-21 16:19:22,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4599483204134367 [2024-06-21 16:19:22,681 INFO L175 Difference]: Start difference. First operand has 135 places, 154 transitions, 1411 flow. Second operand 9 states and 178 transitions. [2024-06-21 16:19:22,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 186 transitions, 1997 flow [2024-06-21 16:19:22,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 186 transitions, 1797 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-21 16:19:22,766 INFO L231 Difference]: Finished difference. Result has 137 places, 154 transitions, 1403 flow [2024-06-21 16:19:22,766 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} [2024-06-21 16:19:22,767 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 93 predicate places. [2024-06-21 16:19:22,767 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 154 transitions, 1403 flow [2024-06-21 16:19:22,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:22,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:22,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:22,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 16:19:22,767 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:19:22,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:22,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1028187879, now seen corresponding path program 9 times [2024-06-21 16:19:22,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:22,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926659854] [2024-06-21 16:19:22,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:22,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:22,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:23,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:23,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:23,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926659854] [2024-06-21 16:19:23,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926659854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:23,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:23,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:19:23,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488925436] [2024-06-21 16:19:23,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:23,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:19:23,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:23,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:19:23,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:19:23,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:19:23,622 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) [2024-06-21 16:19:23,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:23,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:19:23,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:24,455 INFO L124 PetriNetUnfolderBase]: 2190/3389 cut-off events. [2024-06-21 16:19:24,455 INFO L125 PetriNetUnfolderBase]: For 197365/197365 co-relation queries the response was YES. [2024-06-21 16:19:24,469 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. [2024-06-21 16:19:24,487 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 97 selfloop transitions, 85 changer transitions 0/187 dead transitions. [2024-06-21 16:19:24,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 187 transitions, 1997 flow [2024-06-21 16:19:24,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:19:24,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:19:24,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-21 16:19:24,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46770025839793283 [2024-06-21 16:19:24,488 INFO L175 Difference]: Start difference. First operand has 137 places, 154 transitions, 1403 flow. Second operand 9 states and 181 transitions. [2024-06-21 16:19:24,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 187 transitions, 1997 flow [2024-06-21 16:19:24,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 187 transitions, 1763 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-21 16:19:24,569 INFO L231 Difference]: Finished difference. Result has 138 places, 154 transitions, 1347 flow [2024-06-21 16:19:24,569 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} [2024-06-21 16:19:24,570 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 94 predicate places. [2024-06-21 16:19:24,570 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 154 transitions, 1347 flow [2024-06-21 16:19:24,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:24,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:24,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:24,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 16:19:24,571 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:19:24,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:24,571 INFO L85 PathProgramCache]: Analyzing trace with hash -800113749, now seen corresponding path program 10 times [2024-06-21 16:19:24,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:24,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190997019] [2024-06-21 16:19:24,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:24,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:24,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:25,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:25,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:25,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190997019] [2024-06-21 16:19:25,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190997019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:25,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:25,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:19:25,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692642459] [2024-06-21 16:19:25,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:25,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:19:25,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:25,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:19:25,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:19:25,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:19:25,504 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) [2024-06-21 16:19:25,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:25,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:19:25,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:26,225 INFO L124 PetriNetUnfolderBase]: 2180/3375 cut-off events. [2024-06-21 16:19:26,225 INFO L125 PetriNetUnfolderBase]: For 203267/203267 co-relation queries the response was YES. [2024-06-21 16:19:26,237 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. [2024-06-21 16:19:26,250 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 94 selfloop transitions, 86 changer transitions 0/185 dead transitions. [2024-06-21 16:19:26,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 185 transitions, 1783 flow [2024-06-21 16:19:26,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:19:26,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:19:26,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-21 16:19:26,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4599483204134367 [2024-06-21 16:19:26,252 INFO L175 Difference]: Start difference. First operand has 138 places, 154 transitions, 1347 flow. Second operand 9 states and 178 transitions. [2024-06-21 16:19:26,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 185 transitions, 1783 flow [2024-06-21 16:19:26,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 185 transitions, 1581 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-21 16:19:26,350 INFO L231 Difference]: Finished difference. Result has 139 places, 154 transitions, 1325 flow [2024-06-21 16:19:26,350 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} [2024-06-21 16:19:26,351 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 95 predicate places. [2024-06-21 16:19:26,351 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 154 transitions, 1325 flow [2024-06-21 16:19:26,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:26,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:26,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:26,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 16:19:26,351 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:19:26,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:26,352 INFO L85 PathProgramCache]: Analyzing trace with hash 607730646, now seen corresponding path program 2 times [2024-06-21 16:19:26,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:26,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435779795] [2024-06-21 16:19:26,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:26,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:26,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:27,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:27,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:27,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435779795] [2024-06-21 16:19:27,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435779795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:27,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:27,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:19:27,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083384761] [2024-06-21 16:19:27,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:27,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:19:27,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:27,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:19:27,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:19:27,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 16:19:27,092 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) [2024-06-21 16:19:27,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:27,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 16:19:27,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:27,506 INFO L124 PetriNetUnfolderBase]: 1853/3001 cut-off events. [2024-06-21 16:19:27,506 INFO L125 PetriNetUnfolderBase]: For 206480/206480 co-relation queries the response was YES. [2024-06-21 16:19:27,518 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. [2024-06-21 16:19:27,529 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 121 selfloop transitions, 18 changer transitions 0/166 dead transitions. [2024-06-21 16:19:27,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 166 transitions, 1663 flow [2024-06-21 16:19:27,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:19:27,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:19:27,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-21 16:19:27,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46124031007751937 [2024-06-21 16:19:27,531 INFO L175 Difference]: Start difference. First operand has 139 places, 154 transitions, 1325 flow. Second operand 6 states and 119 transitions. [2024-06-21 16:19:27,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 166 transitions, 1663 flow [2024-06-21 16:19:27,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 166 transitions, 1459 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-21 16:19:27,630 INFO L231 Difference]: Finished difference. Result has 136 places, 157 transitions, 1207 flow [2024-06-21 16:19:27,630 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} [2024-06-21 16:19:27,630 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 92 predicate places. [2024-06-21 16:19:27,630 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 157 transitions, 1207 flow [2024-06-21 16:19:27,631 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) [2024-06-21 16:19:27,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:27,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:27,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 16:19:27,631 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:19:27,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:27,631 INFO L85 PathProgramCache]: Analyzing trace with hash 600118038, now seen corresponding path program 1 times [2024-06-21 16:19:27,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:27,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407771518] [2024-06-21 16:19:27,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:27,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:27,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:28,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:28,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:28,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407771518] [2024-06-21 16:19:28,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407771518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:28,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:28,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:19:28,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200190592] [2024-06-21 16:19:28,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:28,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:19:28,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:28,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:19:28,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:19:28,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 16:19:28,215 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) [2024-06-21 16:19:28,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:28,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 16:19:28,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:28,713 INFO L124 PetriNetUnfolderBase]: 1831/3010 cut-off events. [2024-06-21 16:19:28,714 INFO L125 PetriNetUnfolderBase]: For 182967/182967 co-relation queries the response was YES. [2024-06-21 16:19:28,725 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. [2024-06-21 16:19:28,736 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 144 selfloop transitions, 11 changer transitions 0/172 dead transitions. [2024-06-21 16:19:28,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 172 transitions, 1585 flow [2024-06-21 16:19:28,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:19:28,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:19:28,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-21 16:19:28,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-21 16:19:28,737 INFO L175 Difference]: Start difference. First operand has 136 places, 157 transitions, 1207 flow. Second operand 6 states and 120 transitions. [2024-06-21 16:19:28,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 172 transitions, 1585 flow [2024-06-21 16:19:28,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 172 transitions, 1521 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 16:19:28,817 INFO L231 Difference]: Finished difference. Result has 138 places, 160 transitions, 1215 flow [2024-06-21 16:19:28,817 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} [2024-06-21 16:19:28,818 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 94 predicate places. [2024-06-21 16:19:28,818 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 160 transitions, 1215 flow [2024-06-21 16:19:28,818 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) [2024-06-21 16:19:28,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:28,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:28,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 16:19:28,819 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:19:28,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:28,819 INFO L85 PathProgramCache]: Analyzing trace with hash -791525199, now seen corresponding path program 1 times [2024-06-21 16:19:28,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:28,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010826068] [2024-06-21 16:19:28,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:28,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:28,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:29,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:29,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:29,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010826068] [2024-06-21 16:19:29,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010826068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:29,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:29,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:19:29,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966743570] [2024-06-21 16:19:29,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:29,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:19:29,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:29,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:19:29,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:19:29,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:19:29,956 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) [2024-06-21 16:19:29,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:29,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:19:29,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:30,708 INFO L124 PetriNetUnfolderBase]: 1930/3103 cut-off events. [2024-06-21 16:19:30,709 INFO L125 PetriNetUnfolderBase]: For 190099/190099 co-relation queries the response was YES. [2024-06-21 16:19:30,721 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. [2024-06-21 16:19:30,732 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 168 selfloop transitions, 19 changer transitions 0/193 dead transitions. [2024-06-21 16:19:30,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 193 transitions, 1727 flow [2024-06-21 16:19:30,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:19:30,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:19:30,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 16:19:30,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-21 16:19:30,734 INFO L175 Difference]: Start difference. First operand has 138 places, 160 transitions, 1215 flow. Second operand 9 states and 173 transitions. [2024-06-21 16:19:30,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 193 transitions, 1727 flow [2024-06-21 16:19:30,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 193 transitions, 1677 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 16:19:30,827 INFO L231 Difference]: Finished difference. Result has 144 places, 165 transitions, 1288 flow [2024-06-21 16:19:30,827 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} [2024-06-21 16:19:30,827 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 100 predicate places. [2024-06-21 16:19:30,827 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 165 transitions, 1288 flow [2024-06-21 16:19:30,827 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) [2024-06-21 16:19:30,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:30,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:30,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 16:19:30,828 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)] === [2024-06-21 16:19:30,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:30,829 INFO L85 PathProgramCache]: Analyzing trace with hash 607736598, now seen corresponding path program 2 times [2024-06-21 16:19:30,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:30,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933205452] [2024-06-21 16:19:30,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:30,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:30,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:31,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:31,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:31,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933205452] [2024-06-21 16:19:31,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933205452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:31,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:31,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:19:31,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585579197] [2024-06-21 16:19:31,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:31,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:19:31,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:31,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:19:31,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:19:31,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 16:19:31,494 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) [2024-06-21 16:19:31,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:31,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 16:19:31,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:31,877 INFO L124 PetriNetUnfolderBase]: 1820/2993 cut-off events. [2024-06-21 16:19:31,877 INFO L125 PetriNetUnfolderBase]: For 195096/195099 co-relation queries the response was YES. [2024-06-21 16:19:31,889 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. [2024-06-21 16:19:31,899 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 144 selfloop transitions, 16 changer transitions 0/177 dead transitions. [2024-06-21 16:19:31,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 177 transitions, 1676 flow [2024-06-21 16:19:31,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:19:31,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:19:31,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-21 16:19:31,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46124031007751937 [2024-06-21 16:19:31,901 INFO L175 Difference]: Start difference. First operand has 144 places, 165 transitions, 1288 flow. Second operand 6 states and 119 transitions. [2024-06-21 16:19:31,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 177 transitions, 1676 flow [2024-06-21 16:19:31,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 177 transitions, 1593 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-21 16:19:31,998 INFO L231 Difference]: Finished difference. Result has 144 places, 168 transitions, 1295 flow [2024-06-21 16:19:31,998 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} [2024-06-21 16:19:31,999 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 100 predicate places. [2024-06-21 16:19:31,999 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 168 transitions, 1295 flow [2024-06-21 16:19:31,999 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) [2024-06-21 16:19:31,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:31,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:31,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 16:19:31,999 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:19:32,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:32,000 INFO L85 PathProgramCache]: Analyzing trace with hash 393218633, now seen corresponding path program 1 times [2024-06-21 16:19:32,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:32,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668356612] [2024-06-21 16:19:32,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:32,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:32,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:32,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:32,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:32,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668356612] [2024-06-21 16:19:32,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668356612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:32,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:32,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:19:32,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910099529] [2024-06-21 16:19:32,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:32,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:19:32,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:32,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:19:32,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:19:32,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:19:32,939 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) [2024-06-21 16:19:32,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:32,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:19:32,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:33,604 INFO L124 PetriNetUnfolderBase]: 2210/3421 cut-off events. [2024-06-21 16:19:33,604 INFO L125 PetriNetUnfolderBase]: For 248258/248258 co-relation queries the response was YES. [2024-06-21 16:19:33,618 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. [2024-06-21 16:19:33,631 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 184 selfloop transitions, 25 changer transitions 0/214 dead transitions. [2024-06-21 16:19:33,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 214 transitions, 2085 flow [2024-06-21 16:19:33,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:19:33,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:19:33,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-21 16:19:33,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44883720930232557 [2024-06-21 16:19:33,632 INFO L175 Difference]: Start difference. First operand has 144 places, 168 transitions, 1295 flow. Second operand 10 states and 193 transitions. [2024-06-21 16:19:33,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 214 transitions, 2085 flow [2024-06-21 16:19:33,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 214 transitions, 2017 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-21 16:19:33,744 INFO L231 Difference]: Finished difference. Result has 150 places, 172 transitions, 1388 flow [2024-06-21 16:19:33,744 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} [2024-06-21 16:19:33,744 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 106 predicate places. [2024-06-21 16:19:33,744 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 172 transitions, 1388 flow [2024-06-21 16:19:33,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:33,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:33,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:33,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 16:19:33,745 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:19:33,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:33,745 INFO L85 PathProgramCache]: Analyzing trace with hash -377684783, now seen corresponding path program 2 times [2024-06-21 16:19:33,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:33,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213138400] [2024-06-21 16:19:33,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:33,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:33,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:34,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:34,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:34,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213138400] [2024-06-21 16:19:34,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213138400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:34,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:34,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:19:34,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297809054] [2024-06-21 16:19:34,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:34,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:19:34,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:34,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:19:34,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:19:34,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:19:34,690 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) [2024-06-21 16:19:34,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:34,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:19:34,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:35,408 INFO L124 PetriNetUnfolderBase]: 2227/3448 cut-off events. [2024-06-21 16:19:35,409 INFO L125 PetriNetUnfolderBase]: For 260438/260438 co-relation queries the response was YES. [2024-06-21 16:19:35,426 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. [2024-06-21 16:19:35,441 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 184 selfloop transitions, 22 changer transitions 0/211 dead transitions. [2024-06-21 16:19:35,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 211 transitions, 2118 flow [2024-06-21 16:19:35,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:19:35,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:19:35,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-21 16:19:35,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-21 16:19:35,442 INFO L175 Difference]: Start difference. First operand has 150 places, 172 transitions, 1388 flow. Second operand 9 states and 175 transitions. [2024-06-21 16:19:35,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 211 transitions, 2118 flow [2024-06-21 16:19:35,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 211 transitions, 2017 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-21 16:19:35,622 INFO L231 Difference]: Finished difference. Result has 153 places, 174 transitions, 1392 flow [2024-06-21 16:19:35,623 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} [2024-06-21 16:19:35,623 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 109 predicate places. [2024-06-21 16:19:35,623 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 174 transitions, 1392 flow [2024-06-21 16:19:35,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:35,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:35,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:35,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 16:19:35,624 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:19:35,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:35,624 INFO L85 PathProgramCache]: Analyzing trace with hash 395096303, now seen corresponding path program 3 times [2024-06-21 16:19:35,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:35,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419635807] [2024-06-21 16:19:35,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:35,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:35,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:36,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:36,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:36,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419635807] [2024-06-21 16:19:36,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419635807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:36,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:36,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:19:36,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168081670] [2024-06-21 16:19:36,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:36,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:19:36,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:36,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:19:36,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:19:36,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:19:36,583 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) [2024-06-21 16:19:36,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:36,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:19:36,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:37,283 INFO L124 PetriNetUnfolderBase]: 2219/3436 cut-off events. [2024-06-21 16:19:37,283 INFO L125 PetriNetUnfolderBase]: For 267380/267380 co-relation queries the response was YES. [2024-06-21 16:19:37,298 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. [2024-06-21 16:19:37,311 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 184 selfloop transitions, 19 changer transitions 0/208 dead transitions. [2024-06-21 16:19:37,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 208 transitions, 1884 flow [2024-06-21 16:19:37,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:19:37,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:19:37,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 16:19:37,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 16:19:37,314 INFO L175 Difference]: Start difference. First operand has 153 places, 174 transitions, 1392 flow. Second operand 9 states and 171 transitions. [2024-06-21 16:19:37,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 208 transitions, 1884 flow [2024-06-21 16:19:37,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 208 transitions, 1781 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-21 16:19:37,474 INFO L231 Difference]: Finished difference. Result has 155 places, 174 transitions, 1334 flow [2024-06-21 16:19:37,474 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} [2024-06-21 16:19:37,474 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 111 predicate places. [2024-06-21 16:19:37,474 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 174 transitions, 1334 flow [2024-06-21 16:19:37,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:37,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:37,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:37,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 16:19:37,475 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:19:37,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:37,475 INFO L85 PathProgramCache]: Analyzing trace with hash -762359269, now seen corresponding path program 4 times [2024-06-21 16:19:37,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:37,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875523674] [2024-06-21 16:19:37,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:37,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:37,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:38,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:38,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:38,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875523674] [2024-06-21 16:19:38,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875523674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:38,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:38,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:19:38,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263382457] [2024-06-21 16:19:38,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:38,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:19:38,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:38,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:19:38,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:19:38,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:19:38,367 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) [2024-06-21 16:19:38,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:38,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:19:38,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:39,150 INFO L124 PetriNetUnfolderBase]: 2236/3465 cut-off events. [2024-06-21 16:19:39,150 INFO L125 PetriNetUnfolderBase]: For 278268/278271 co-relation queries the response was YES. [2024-06-21 16:19:39,167 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. [2024-06-21 16:19:39,182 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 150 selfloop transitions, 52 changer transitions 0/207 dead transitions. [2024-06-21 16:19:39,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 207 transitions, 1870 flow [2024-06-21 16:19:39,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:19:39,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:19:39,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-21 16:19:39,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-21 16:19:39,184 INFO L175 Difference]: Start difference. First operand has 155 places, 174 transitions, 1334 flow. Second operand 9 states and 175 transitions. [2024-06-21 16:19:39,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 207 transitions, 1870 flow [2024-06-21 16:19:39,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 207 transitions, 1827 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-21 16:19:39,342 INFO L231 Difference]: Finished difference. Result has 156 places, 176 transitions, 1460 flow [2024-06-21 16:19:39,343 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} [2024-06-21 16:19:39,343 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 112 predicate places. [2024-06-21 16:19:39,343 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 176 transitions, 1460 flow [2024-06-21 16:19:39,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:39,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:39,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:39,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 16:19:39,344 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:19:39,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:39,344 INFO L85 PathProgramCache]: Analyzing trace with hash 56986661, now seen corresponding path program 5 times [2024-06-21 16:19:39,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:39,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048528273] [2024-06-21 16:19:39,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:39,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:39,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:40,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:40,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:40,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048528273] [2024-06-21 16:19:40,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048528273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:40,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:40,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:19:40,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498168412] [2024-06-21 16:19:40,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:40,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:19:40,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:40,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:19:40,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:19:40,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:19:40,291 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) [2024-06-21 16:19:40,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:40,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:19:40,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:41,133 INFO L124 PetriNetUnfolderBase]: 2253/3492 cut-off events. [2024-06-21 16:19:41,134 INFO L125 PetriNetUnfolderBase]: For 290988/290991 co-relation queries the response was YES. [2024-06-21 16:19:41,151 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. [2024-06-21 16:19:41,166 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 153 selfloop transitions, 51 changer transitions 0/209 dead transitions. [2024-06-21 16:19:41,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 209 transitions, 2004 flow [2024-06-21 16:19:41,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:19:41,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:19:41,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-21 16:19:41,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45478036175710596 [2024-06-21 16:19:41,168 INFO L175 Difference]: Start difference. First operand has 156 places, 176 transitions, 1460 flow. Second operand 9 states and 176 transitions. [2024-06-21 16:19:41,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 209 transitions, 2004 flow [2024-06-21 16:19:41,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 209 transitions, 1853 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-21 16:19:41,346 INFO L231 Difference]: Finished difference. Result has 158 places, 178 transitions, 1480 flow [2024-06-21 16:19:41,346 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} [2024-06-21 16:19:41,347 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 114 predicate places. [2024-06-21 16:19:41,347 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 178 transitions, 1480 flow [2024-06-21 16:19:41,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:41,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:41,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:41,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 16:19:41,347 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:19:41,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:41,348 INFO L85 PathProgramCache]: Analyzing trace with hash -239156633, now seen corresponding path program 6 times [2024-06-21 16:19:41,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:41,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114759905] [2024-06-21 16:19:41,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:41,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:41,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:42,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:42,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:42,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114759905] [2024-06-21 16:19:42,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114759905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:42,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:42,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:19:42,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318964369] [2024-06-21 16:19:42,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:42,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:19:42,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:42,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:19:42,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:19:42,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:19:42,329 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) [2024-06-21 16:19:42,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:42,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:19:42,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:43,062 INFO L124 PetriNetUnfolderBase]: 2270/3519 cut-off events. [2024-06-21 16:19:43,062 INFO L125 PetriNetUnfolderBase]: For 303247/303250 co-relation queries the response was YES. [2024-06-21 16:19:43,078 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. [2024-06-21 16:19:43,092 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 151 selfloop transitions, 56 changer transitions 0/212 dead transitions. [2024-06-21 16:19:43,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 212 transitions, 2036 flow [2024-06-21 16:19:43,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:19:43,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:19:43,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-21 16:19:43,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-21 16:19:43,094 INFO L175 Difference]: Start difference. First operand has 158 places, 178 transitions, 1480 flow. Second operand 9 states and 177 transitions. [2024-06-21 16:19:43,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 212 transitions, 2036 flow [2024-06-21 16:19:43,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 212 transitions, 1883 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-21 16:19:43,284 INFO L231 Difference]: Finished difference. Result has 160 places, 180 transitions, 1512 flow [2024-06-21 16:19:43,284 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} [2024-06-21 16:19:43,284 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 116 predicate places. [2024-06-21 16:19:43,284 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 180 transitions, 1512 flow [2024-06-21 16:19:43,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:43,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:43,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:43,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 16:19:43,285 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:19:43,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:43,285 INFO L85 PathProgramCache]: Analyzing trace with hash 781151836, now seen corresponding path program 1 times [2024-06-21 16:19:43,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:43,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547190440] [2024-06-21 16:19:43,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:43,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:43,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:44,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:44,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:44,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547190440] [2024-06-21 16:19:44,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547190440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:44,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:44,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:19:44,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204573584] [2024-06-21 16:19:44,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:44,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:19:44,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:44,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:19:44,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:19:44,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 16:19:44,347 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) [2024-06-21 16:19:44,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:44,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 16:19:44,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:44,938 INFO L124 PetriNetUnfolderBase]: 1938/3160 cut-off events. [2024-06-21 16:19:44,938 INFO L125 PetriNetUnfolderBase]: For 309838/309852 co-relation queries the response was YES. [2024-06-21 16:19:44,953 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. [2024-06-21 16:19:44,966 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 150 selfloop transitions, 16 changer transitions 0/199 dead transitions. [2024-06-21 16:19:44,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 199 transitions, 1922 flow [2024-06-21 16:19:44,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:19:44,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:19:44,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-21 16:19:44,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46179401993355484 [2024-06-21 16:19:44,968 INFO L175 Difference]: Start difference. First operand has 160 places, 180 transitions, 1512 flow. Second operand 7 states and 139 transitions. [2024-06-21 16:19:44,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 199 transitions, 1922 flow [2024-06-21 16:19:45,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 199 transitions, 1755 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-21 16:19:45,133 INFO L231 Difference]: Finished difference. Result has 160 places, 183 transitions, 1427 flow [2024-06-21 16:19:45,133 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} [2024-06-21 16:19:45,134 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 116 predicate places. [2024-06-21 16:19:45,134 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 183 transitions, 1427 flow [2024-06-21 16:19:45,134 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) [2024-06-21 16:19:45,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:45,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:45,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 16:19:45,135 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:19:45,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:45,135 INFO L85 PathProgramCache]: Analyzing trace with hash 900983129, now seen corresponding path program 7 times [2024-06-21 16:19:45,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:45,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742724680] [2024-06-21 16:19:45,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:45,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:45,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:45,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:45,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:45,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742724680] [2024-06-21 16:19:45,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742724680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:45,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:45,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:19:45,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81064040] [2024-06-21 16:19:45,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:45,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:19:45,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:45,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:19:45,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:19:46,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:19:46,059 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) [2024-06-21 16:19:46,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:46,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:19:46,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:47,000 INFO L124 PetriNetUnfolderBase]: 2297/3559 cut-off events. [2024-06-21 16:19:47,000 INFO L125 PetriNetUnfolderBase]: For 325295/325295 co-relation queries the response was YES. [2024-06-21 16:19:47,016 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. [2024-06-21 16:19:47,028 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 157 selfloop transitions, 51 changer transitions 0/213 dead transitions. [2024-06-21 16:19:47,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 213 transitions, 1979 flow [2024-06-21 16:19:47,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:19:47,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:19:47,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 16:19:47,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-21 16:19:47,030 INFO L175 Difference]: Start difference. First operand has 160 places, 183 transitions, 1427 flow. Second operand 9 states and 173 transitions. [2024-06-21 16:19:47,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 213 transitions, 1979 flow [2024-06-21 16:19:47,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 213 transitions, 1919 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 16:19:47,228 INFO L231 Difference]: Finished difference. Result has 164 places, 185 transitions, 1546 flow [2024-06-21 16:19:47,228 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} [2024-06-21 16:19:47,228 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 120 predicate places. [2024-06-21 16:19:47,228 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 185 transitions, 1546 flow [2024-06-21 16:19:47,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:47,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:47,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:47,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 16:19:47,229 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:19:47,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:47,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1809057431, now seen corresponding path program 8 times [2024-06-21 16:19:47,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:47,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912028475] [2024-06-21 16:19:47,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:47,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:47,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:47,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:47,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:47,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912028475] [2024-06-21 16:19:47,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912028475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:47,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:47,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:19:47,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324217531] [2024-06-21 16:19:48,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:48,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:19:48,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:48,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:19:48,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:19:48,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:19:48,070 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) [2024-06-21 16:19:48,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:48,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:19:48,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:48,848 INFO L124 PetriNetUnfolderBase]: 2314/3586 cut-off events. [2024-06-21 16:19:48,848 INFO L125 PetriNetUnfolderBase]: For 339531/339531 co-relation queries the response was YES. [2024-06-21 16:19:48,865 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. [2024-06-21 16:19:48,878 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 158 selfloop transitions, 52 changer transitions 0/215 dead transitions. [2024-06-21 16:19:48,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 215 transitions, 2106 flow [2024-06-21 16:19:48,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:19:48,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:19:48,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 16:19:48,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 16:19:48,880 INFO L175 Difference]: Start difference. First operand has 164 places, 185 transitions, 1546 flow. Second operand 9 states and 172 transitions. [2024-06-21 16:19:48,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 215 transitions, 2106 flow [2024-06-21 16:19:49,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 215 transitions, 1945 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-21 16:19:49,078 INFO L231 Difference]: Finished difference. Result has 166 places, 187 transitions, 1570 flow [2024-06-21 16:19:49,078 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} [2024-06-21 16:19:49,078 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 122 predicate places. [2024-06-21 16:19:49,078 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 187 transitions, 1570 flow [2024-06-21 16:19:49,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:49,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:49,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:49,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 16:19:49,079 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:19:49,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:49,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1809205301, now seen corresponding path program 9 times [2024-06-21 16:19:49,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:49,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499940452] [2024-06-21 16:19:49,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:49,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:49,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:49,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:49,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:49,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499940452] [2024-06-21 16:19:49,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499940452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:49,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:49,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:19:49,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532343102] [2024-06-21 16:19:49,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:49,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:19:49,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:49,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:19:49,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:19:50,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:19:50,035 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) [2024-06-21 16:19:50,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:50,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:19:50,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:50,862 INFO L124 PetriNetUnfolderBase]: 2331/3613 cut-off events. [2024-06-21 16:19:50,862 INFO L125 PetriNetUnfolderBase]: For 353012/353012 co-relation queries the response was YES. [2024-06-21 16:19:50,882 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. [2024-06-21 16:19:50,898 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 158 selfloop transitions, 59 changer transitions 0/222 dead transitions. [2024-06-21 16:19:50,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 222 transitions, 2430 flow [2024-06-21 16:19:50,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:19:50,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:19:50,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-21 16:19:50,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-21 16:19:50,913 INFO L175 Difference]: Start difference. First operand has 166 places, 187 transitions, 1570 flow. Second operand 9 states and 175 transitions. [2024-06-21 16:19:50,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 222 transitions, 2430 flow [2024-06-21 16:19:51,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 222 transitions, 2263 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-21 16:19:51,110 INFO L231 Difference]: Finished difference. Result has 168 places, 191 transitions, 1680 flow [2024-06-21 16:19:51,110 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} [2024-06-21 16:19:51,111 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 124 predicate places. [2024-06-21 16:19:51,111 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 191 transitions, 1680 flow [2024-06-21 16:19:51,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:51,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:51,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:51,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 16:19:51,111 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:19:51,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:51,112 INFO L85 PathProgramCache]: Analyzing trace with hash 966273303, now seen corresponding path program 10 times [2024-06-21 16:19:51,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:51,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824137114] [2024-06-21 16:19:51,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:51,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:51,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:51,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:51,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:51,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824137114] [2024-06-21 16:19:51,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824137114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:51,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:51,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:19:51,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939441753] [2024-06-21 16:19:51,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:51,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:19:51,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:51,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:19:51,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:19:52,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:19:52,043 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) [2024-06-21 16:19:52,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:52,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:19:52,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:52,897 INFO L124 PetriNetUnfolderBase]: 2323/3601 cut-off events. [2024-06-21 16:19:52,898 INFO L125 PetriNetUnfolderBase]: For 360098/360098 co-relation queries the response was YES. [2024-06-21 16:19:52,916 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. [2024-06-21 16:19:52,930 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 160 selfloop transitions, 54 changer transitions 0/219 dead transitions. [2024-06-21 16:19:52,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 219 transitions, 2178 flow [2024-06-21 16:19:52,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:19:52,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:19:52,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 16:19:52,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 16:19:52,932 INFO L175 Difference]: Start difference. First operand has 168 places, 191 transitions, 1680 flow. Second operand 9 states and 171 transitions. [2024-06-21 16:19:52,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 219 transitions, 2178 flow [2024-06-21 16:19:53,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 219 transitions, 1990 flow, removed 65 selfloop flow, removed 5 redundant places. [2024-06-21 16:19:53,136 INFO L231 Difference]: Finished difference. Result has 172 places, 191 transitions, 1607 flow [2024-06-21 16:19:53,136 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} [2024-06-21 16:19:53,136 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 128 predicate places. [2024-06-21 16:19:53,137 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 191 transitions, 1607 flow [2024-06-21 16:19:53,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:53,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:53,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:53,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 16:19:53,137 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)] === [2024-06-21 16:19:53,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:53,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1660257626, now seen corresponding path program 2 times [2024-06-21 16:19:53,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:53,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648592384] [2024-06-21 16:19:53,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:53,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:53,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:53,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:53,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:53,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648592384] [2024-06-21 16:19:53,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648592384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:53,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:53,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:19:53,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850418650] [2024-06-21 16:19:53,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:53,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:19:53,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:53,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:19:53,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:19:54,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 16:19:54,030 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) [2024-06-21 16:19:54,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:54,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 16:19:54,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:54,587 INFO L124 PetriNetUnfolderBase]: 1976/3214 cut-off events. [2024-06-21 16:19:54,588 INFO L125 PetriNetUnfolderBase]: For 361169/361175 co-relation queries the response was YES. [2024-06-21 16:19:54,605 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. [2024-06-21 16:19:54,618 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 145 selfloop transitions, 28 changer transitions 0/210 dead transitions. [2024-06-21 16:19:54,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 210 transitions, 2187 flow [2024-06-21 16:19:54,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:19:54,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:19:54,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-21 16:19:54,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45514950166112955 [2024-06-21 16:19:54,620 INFO L175 Difference]: Start difference. First operand has 172 places, 191 transitions, 1607 flow. Second operand 7 states and 137 transitions. [2024-06-21 16:19:54,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 210 transitions, 2187 flow [2024-06-21 16:19:54,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 210 transitions, 2060 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 16:19:54,849 INFO L231 Difference]: Finished difference. Result has 172 places, 199 transitions, 1659 flow [2024-06-21 16:19:54,849 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} [2024-06-21 16:19:54,849 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 128 predicate places. [2024-06-21 16:19:54,850 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 199 transitions, 1659 flow [2024-06-21 16:19:54,850 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) [2024-06-21 16:19:54,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:54,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:54,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 16:19:54,850 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)] === [2024-06-21 16:19:54,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:54,851 INFO L85 PathProgramCache]: Analyzing trace with hash -435577184, now seen corresponding path program 3 times [2024-06-21 16:19:54,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:54,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645342320] [2024-06-21 16:19:54,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:54,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:54,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:55,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:55,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:55,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645342320] [2024-06-21 16:19:55,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645342320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:55,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:55,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:19:55,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367398455] [2024-06-21 16:19:55,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:55,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:19:55,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:55,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:19:55,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:19:55,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 16:19:55,759 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) [2024-06-21 16:19:55,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:55,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 16:19:55,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:56,329 INFO L124 PetriNetUnfolderBase]: 1973/3210 cut-off events. [2024-06-21 16:19:56,330 INFO L125 PetriNetUnfolderBase]: For 372735/372741 co-relation queries the response was YES. [2024-06-21 16:19:56,346 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. [2024-06-21 16:19:56,360 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 152 selfloop transitions, 21 changer transitions 0/210 dead transitions. [2024-06-21 16:19:56,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 210 transitions, 2036 flow [2024-06-21 16:19:56,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:19:56,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:19:56,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-21 16:19:56,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4485049833887043 [2024-06-21 16:19:56,361 INFO L175 Difference]: Start difference. First operand has 172 places, 199 transitions, 1659 flow. Second operand 7 states and 135 transitions. [2024-06-21 16:19:56,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 210 transitions, 2036 flow [2024-06-21 16:19:56,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 210 transitions, 1947 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-21 16:19:56,644 INFO L231 Difference]: Finished difference. Result has 176 places, 200 transitions, 1627 flow [2024-06-21 16:19:56,644 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} [2024-06-21 16:19:56,644 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 132 predicate places. [2024-06-21 16:19:56,644 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 200 transitions, 1627 flow [2024-06-21 16:19:56,645 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) [2024-06-21 16:19:56,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:56,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:56,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 16:19:56,645 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:19:56,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:56,647 INFO L85 PathProgramCache]: Analyzing trace with hash 260180110, now seen corresponding path program 1 times [2024-06-21 16:19:56,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:56,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639775643] [2024-06-21 16:19:56,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:56,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:56,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:57,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:57,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:57,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639775643] [2024-06-21 16:19:57,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639775643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:57,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:57,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:19:57,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081614428] [2024-06-21 16:19:57,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:57,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:19:57,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:57,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:19:57,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:19:57,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:19:57,412 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) [2024-06-21 16:19:57,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:57,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:19:57,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:58,033 INFO L124 PetriNetUnfolderBase]: 2191/3474 cut-off events. [2024-06-21 16:19:58,034 INFO L125 PetriNetUnfolderBase]: For 387199/387199 co-relation queries the response was YES. [2024-06-21 16:19:58,050 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. [2024-06-21 16:19:58,062 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 195 selfloop transitions, 14 changer transitions 0/219 dead transitions. [2024-06-21 16:19:58,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 219 transitions, 2141 flow [2024-06-21 16:19:58,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:19:58,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:19:58,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-21 16:19:58,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 16:19:58,063 INFO L175 Difference]: Start difference. First operand has 176 places, 200 transitions, 1627 flow. Second operand 7 states and 133 transitions. [2024-06-21 16:19:58,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 219 transitions, 2141 flow [2024-06-21 16:19:58,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 219 transitions, 2095 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 16:19:58,312 INFO L231 Difference]: Finished difference. Result has 178 places, 203 transitions, 1677 flow [2024-06-21 16:19:58,313 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} [2024-06-21 16:19:58,313 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 134 predicate places. [2024-06-21 16:19:58,313 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 203 transitions, 1677 flow [2024-06-21 16:19:58,313 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) [2024-06-21 16:19:58,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:58,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:58,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 16:19:58,314 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:19:58,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:58,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1651692698, now seen corresponding path program 1 times [2024-06-21 16:19:58,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:58,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184095721] [2024-06-21 16:19:58,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:58,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:58,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:59,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:59,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:59,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184095721] [2024-06-21 16:19:59,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184095721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:59,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:59,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:19:59,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737123778] [2024-06-21 16:19:59,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:59,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:19:59,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:59,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:19:59,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:19:59,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 16:19:59,164 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) [2024-06-21 16:19:59,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:59,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 16:19:59,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:59,747 INFO L124 PetriNetUnfolderBase]: 2078/3365 cut-off events. [2024-06-21 16:19:59,747 INFO L125 PetriNetUnfolderBase]: For 398592/398592 co-relation queries the response was YES. [2024-06-21 16:19:59,765 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. [2024-06-21 16:19:59,778 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 173 selfloop transitions, 14 changer transitions 0/219 dead transitions. [2024-06-21 16:19:59,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 219 transitions, 2127 flow [2024-06-21 16:19:59,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:19:59,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:19:59,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-21 16:19:59,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-21 16:19:59,780 INFO L175 Difference]: Start difference. First operand has 178 places, 203 transitions, 1677 flow. Second operand 7 states and 136 transitions. [2024-06-21 16:19:59,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 219 transitions, 2127 flow [2024-06-21 16:20:00,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 219 transitions, 2053 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-21 16:20:00,047 INFO L231 Difference]: Finished difference. Result has 180 places, 206 transitions, 1687 flow [2024-06-21 16:20:00,047 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} [2024-06-21 16:20:00,049 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 136 predicate places. [2024-06-21 16:20:00,049 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 206 transitions, 1687 flow [2024-06-21 16:20:00,049 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) [2024-06-21 16:20:00,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:00,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:00,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 16:20:00,050 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:20:00,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:00,050 INFO L85 PathProgramCache]: Analyzing trace with hash 260186620, now seen corresponding path program 2 times [2024-06-21 16:20:00,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:00,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553024219] [2024-06-21 16:20:00,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:00,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:00,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:00,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:00,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:00,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553024219] [2024-06-21 16:20:00,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553024219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:00,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:00,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:20:00,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587941672] [2024-06-21 16:20:00,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:00,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:20:00,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:00,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:20:00,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:20:00,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:20:00,886 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) [2024-06-21 16:20:00,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:00,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:20:00,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:01,456 INFO L124 PetriNetUnfolderBase]: 2206/3495 cut-off events. [2024-06-21 16:20:01,456 INFO L125 PetriNetUnfolderBase]: For 411506/411506 co-relation queries the response was YES. [2024-06-21 16:20:01,477 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. [2024-06-21 16:20:01,493 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 193 selfloop transitions, 19 changer transitions 0/222 dead transitions. [2024-06-21 16:20:01,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 222 transitions, 2207 flow [2024-06-21 16:20:01,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:20:01,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:20:01,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-21 16:20:01,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43853820598006643 [2024-06-21 16:20:01,494 INFO L175 Difference]: Start difference. First operand has 180 places, 206 transitions, 1687 flow. Second operand 7 states and 132 transitions. [2024-06-21 16:20:01,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 222 transitions, 2207 flow [2024-06-21 16:20:01,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 222 transitions, 2145 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 16:20:01,793 INFO L231 Difference]: Finished difference. Result has 182 places, 209 transitions, 1739 flow [2024-06-21 16:20:01,794 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} [2024-06-21 16:20:01,794 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 138 predicate places. [2024-06-21 16:20:01,794 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 209 transitions, 1739 flow [2024-06-21 16:20:01,794 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) [2024-06-21 16:20:01,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:01,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:01,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 16:20:01,795 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:20:01,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:01,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1430286668, now seen corresponding path program 2 times [2024-06-21 16:20:01,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:01,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946282173] [2024-06-21 16:20:01,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:01,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:01,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:02,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:02,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:02,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946282173] [2024-06-21 16:20:02,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946282173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:02,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:02,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:20:02,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659507631] [2024-06-21 16:20:02,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:02,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:20:02,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:02,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:20:02,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:20:02,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 16:20:02,586 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) [2024-06-21 16:20:02,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:02,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 16:20:02,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:03,168 INFO L124 PetriNetUnfolderBase]: 2093/3389 cut-off events. [2024-06-21 16:20:03,168 INFO L125 PetriNetUnfolderBase]: For 425066/425069 co-relation queries the response was YES. [2024-06-21 16:20:03,187 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. [2024-06-21 16:20:03,201 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 167 selfloop transitions, 28 changer transitions 0/228 dead transitions. [2024-06-21 16:20:03,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 228 transitions, 2389 flow [2024-06-21 16:20:03,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:20:03,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:20:03,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-21 16:20:03,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46179401993355484 [2024-06-21 16:20:03,203 INFO L175 Difference]: Start difference. First operand has 182 places, 209 transitions, 1739 flow. Second operand 7 states and 139 transitions. [2024-06-21 16:20:03,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 228 transitions, 2389 flow [2024-06-21 16:20:03,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 228 transitions, 2297 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-21 16:20:03,501 INFO L231 Difference]: Finished difference. Result has 184 places, 215 transitions, 1820 flow [2024-06-21 16:20:03,501 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} [2024-06-21 16:20:03,502 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 140 predicate places. [2024-06-21 16:20:03,502 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 215 transitions, 1820 flow [2024-06-21 16:20:03,502 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) [2024-06-21 16:20:03,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:03,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:03,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 16:20:03,502 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:20:03,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:03,503 INFO L85 PathProgramCache]: Analyzing trace with hash 266673370, now seen corresponding path program 3 times [2024-06-21 16:20:03,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:03,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975886864] [2024-06-21 16:20:03,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:03,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:03,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:04,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:04,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:04,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975886864] [2024-06-21 16:20:04,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975886864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:04,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:04,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:20:04,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896630489] [2024-06-21 16:20:04,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:04,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:20:04,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:04,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:20:04,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:20:04,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:20:04,289 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) [2024-06-21 16:20:04,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:04,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:20:04,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:04,854 INFO L124 PetriNetUnfolderBase]: 2213/3509 cut-off events. [2024-06-21 16:20:04,854 INFO L125 PetriNetUnfolderBase]: For 436557/436560 co-relation queries the response was YES. [2024-06-21 16:20:04,872 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. [2024-06-21 16:20:04,886 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 192 selfloop transitions, 26 changer transitions 0/228 dead transitions. [2024-06-21 16:20:04,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 228 transitions, 2352 flow [2024-06-21 16:20:04,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:20:04,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:20:04,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-21 16:20:04,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-21 16:20:04,887 INFO L175 Difference]: Start difference. First operand has 184 places, 215 transitions, 1820 flow. Second operand 7 states and 131 transitions. [2024-06-21 16:20:04,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 228 transitions, 2352 flow [2024-06-21 16:20:05,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 228 transitions, 2286 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-21 16:20:05,225 INFO L231 Difference]: Finished difference. Result has 188 places, 218 transitions, 1890 flow [2024-06-21 16:20:05,225 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} [2024-06-21 16:20:05,226 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 144 predicate places. [2024-06-21 16:20:05,226 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 218 transitions, 1890 flow [2024-06-21 16:20:05,226 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) [2024-06-21 16:20:05,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:05,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:05,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 16:20:05,226 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:20:05,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:05,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1430278298, now seen corresponding path program 3 times [2024-06-21 16:20:05,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:05,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552951566] [2024-06-21 16:20:05,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:05,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:05,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:06,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:06,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:06,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552951566] [2024-06-21 16:20:06,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552951566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:06,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:06,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:20:06,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473085445] [2024-06-21 16:20:06,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:06,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:20:06,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:06,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:20:06,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:20:06,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 16:20:06,399 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) [2024-06-21 16:20:06,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:06,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 16:20:06,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:06,987 INFO L124 PetriNetUnfolderBase]: 2084/3377 cut-off events. [2024-06-21 16:20:06,988 INFO L125 PetriNetUnfolderBase]: For 443107/443110 co-relation queries the response was YES. [2024-06-21 16:20:07,012 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. [2024-06-21 16:20:07,033 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 178 selfloop transitions, 19 changer transitions 0/231 dead transitions. [2024-06-21 16:20:07,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 231 transitions, 2358 flow [2024-06-21 16:20:07,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:20:07,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:20:07,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-21 16:20:07,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4485049833887043 [2024-06-21 16:20:07,034 INFO L175 Difference]: Start difference. First operand has 188 places, 218 transitions, 1890 flow. Second operand 7 states and 135 transitions. [2024-06-21 16:20:07,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 231 transitions, 2358 flow [2024-06-21 16:20:07,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 231 transitions, 2244 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-21 16:20:07,387 INFO L231 Difference]: Finished difference. Result has 190 places, 221 transitions, 1876 flow [2024-06-21 16:20:07,388 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} [2024-06-21 16:20:07,388 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 146 predicate places. [2024-06-21 16:20:07,388 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 221 transitions, 1876 flow [2024-06-21 16:20:07,388 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) [2024-06-21 16:20:07,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:07,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:07,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 16:20:07,389 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)] === [2024-06-21 16:20:07,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:07,389 INFO L85 PathProgramCache]: Analyzing trace with hash 94647120, now seen corresponding path program 1 times [2024-06-21 16:20:07,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:07,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554767806] [2024-06-21 16:20:07,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:07,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:07,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:08,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:08,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:08,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554767806] [2024-06-21 16:20:08,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554767806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:08,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:08,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:20:08,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511755911] [2024-06-21 16:20:08,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:08,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:20:08,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:08,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:20:08,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:20:08,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:20:08,359 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) [2024-06-21 16:20:08,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:08,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:20:08,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:09,224 INFO L124 PetriNetUnfolderBase]: 2522/3945 cut-off events. [2024-06-21 16:20:09,225 INFO L125 PetriNetUnfolderBase]: For 532938/532938 co-relation queries the response was YES. [2024-06-21 16:20:09,247 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. [2024-06-21 16:20:09,262 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 244 selfloop transitions, 29 changer transitions 0/278 dead transitions. [2024-06-21 16:20:09,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 278 transitions, 2932 flow [2024-06-21 16:20:09,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:20:09,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:20:09,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 218 transitions. [2024-06-21 16:20:09,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4608879492600423 [2024-06-21 16:20:09,264 INFO L175 Difference]: Start difference. First operand has 190 places, 221 transitions, 1876 flow. Second operand 11 states and 218 transitions. [2024-06-21 16:20:09,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 278 transitions, 2932 flow [2024-06-21 16:20:09,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 278 transitions, 2858 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 16:20:09,599 INFO L231 Difference]: Finished difference. Result has 196 places, 223 transitions, 1976 flow [2024-06-21 16:20:09,599 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} [2024-06-21 16:20:09,599 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 152 predicate places. [2024-06-21 16:20:09,599 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 223 transitions, 1976 flow [2024-06-21 16:20:09,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:09,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:09,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:09,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 16:20:09,600 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)] === [2024-06-21 16:20:09,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:09,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1454781616, now seen corresponding path program 2 times [2024-06-21 16:20:09,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:09,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274769749] [2024-06-21 16:20:09,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:09,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:09,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:10,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:10,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:10,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274769749] [2024-06-21 16:20:10,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274769749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:10,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:10,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:20:10,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907938716] [2024-06-21 16:20:10,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:10,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:20:10,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:10,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:20:10,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:20:10,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:20:10,721 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) [2024-06-21 16:20:10,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:10,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:20:10,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:11,673 INFO L124 PetriNetUnfolderBase]: 2580/4054 cut-off events. [2024-06-21 16:20:11,673 INFO L125 PetriNetUnfolderBase]: For 549135/549135 co-relation queries the response was YES. [2024-06-21 16:20:11,697 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. [2024-06-21 16:20:11,713 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 244 selfloop transitions, 25 changer transitions 0/274 dead transitions. [2024-06-21 16:20:11,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 274 transitions, 2964 flow [2024-06-21 16:20:11,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:20:11,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:20:11,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-21 16:20:11,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-21 16:20:11,715 INFO L175 Difference]: Start difference. First operand has 196 places, 223 transitions, 1976 flow. Second operand 10 states and 200 transitions. [2024-06-21 16:20:11,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 274 transitions, 2964 flow [2024-06-21 16:20:12,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 274 transitions, 2880 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-21 16:20:12,146 INFO L231 Difference]: Finished difference. Result has 199 places, 224 transitions, 2004 flow [2024-06-21 16:20:12,146 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} [2024-06-21 16:20:12,146 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 155 predicate places. [2024-06-21 16:20:12,147 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 224 transitions, 2004 flow [2024-06-21 16:20:12,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:12,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:12,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:12,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 16:20:12,147 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)] === [2024-06-21 16:20:12,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:12,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1450197646, now seen corresponding path program 3 times [2024-06-21 16:20:12,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:12,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997387368] [2024-06-21 16:20:12,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:12,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:12,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:13,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:13,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:13,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997387368] [2024-06-21 16:20:13,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997387368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:13,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:13,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:20:13,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032242453] [2024-06-21 16:20:13,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:13,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:20:13,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:13,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:20:13,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:20:13,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:20:13,130 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) [2024-06-21 16:20:13,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:13,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:20:13,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:14,094 INFO L124 PetriNetUnfolderBase]: 2638/4152 cut-off events. [2024-06-21 16:20:14,094 INFO L125 PetriNetUnfolderBase]: For 568960/568960 co-relation queries the response was YES. [2024-06-21 16:20:14,127 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. [2024-06-21 16:20:14,146 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 246 selfloop transitions, 23 changer transitions 0/274 dead transitions. [2024-06-21 16:20:14,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 274 transitions, 2990 flow [2024-06-21 16:20:14,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:20:14,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:20:14,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-21 16:20:14,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4604651162790698 [2024-06-21 16:20:14,149 INFO L175 Difference]: Start difference. First operand has 199 places, 224 transitions, 2004 flow. Second operand 10 states and 198 transitions. [2024-06-21 16:20:14,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 274 transitions, 2990 flow [2024-06-21 16:20:14,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 274 transitions, 2898 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-21 16:20:14,509 INFO L231 Difference]: Finished difference. Result has 201 places, 225 transitions, 2016 flow [2024-06-21 16:20:14,509 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} [2024-06-21 16:20:14,509 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 157 predicate places. [2024-06-21 16:20:14,509 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 225 transitions, 2016 flow [2024-06-21 16:20:14,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:14,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:14,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:14,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 16:20:14,510 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)] === [2024-06-21 16:20:14,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:14,510 INFO L85 PathProgramCache]: Analyzing trace with hash -2000254388, now seen corresponding path program 4 times [2024-06-21 16:20:14,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:14,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404706587] [2024-06-21 16:20:14,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:14,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:14,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:15,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:15,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:15,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404706587] [2024-06-21 16:20:15,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404706587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:15,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:15,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:20:15,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208555795] [2024-06-21 16:20:15,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:15,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:20:15,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:15,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:20:15,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:20:15,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:20:15,519 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) [2024-06-21 16:20:15,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:15,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:20:15,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:16,498 INFO L124 PetriNetUnfolderBase]: 2602/4096 cut-off events. [2024-06-21 16:20:16,498 INFO L125 PetriNetUnfolderBase]: For 551704/551704 co-relation queries the response was YES. [2024-06-21 16:20:16,523 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. [2024-06-21 16:20:16,538 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 242 selfloop transitions, 21 changer transitions 0/268 dead transitions. [2024-06-21 16:20:16,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 268 transitions, 2682 flow [2024-06-21 16:20:16,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:20:16,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:20:16,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-21 16:20:16,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-21 16:20:16,540 INFO L175 Difference]: Start difference. First operand has 201 places, 225 transitions, 2016 flow. Second operand 10 states and 192 transitions. [2024-06-21 16:20:16,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 268 transitions, 2682 flow [2024-06-21 16:20:16,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 268 transitions, 2571 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-21 16:20:16,880 INFO L231 Difference]: Finished difference. Result has 203 places, 225 transitions, 1954 flow [2024-06-21 16:20:16,880 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} [2024-06-21 16:20:16,881 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 159 predicate places. [2024-06-21 16:20:16,881 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 225 transitions, 1954 flow [2024-06-21 16:20:16,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:16,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:16,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:16,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 16:20:16,882 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)] === [2024-06-21 16:20:16,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:16,882 INFO L85 PathProgramCache]: Analyzing trace with hash 2143101844, now seen corresponding path program 5 times [2024-06-21 16:20:16,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:16,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816417952] [2024-06-21 16:20:16,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:16,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:16,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:17,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:17,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:17,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816417952] [2024-06-21 16:20:17,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816417952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:17,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:17,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:20:17,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384230347] [2024-06-21 16:20:17,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:17,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:20:17,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:17,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:20:17,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:20:17,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:20:17,884 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) [2024-06-21 16:20:17,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:17,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:20:17,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:19,007 INFO L124 PetriNetUnfolderBase]: 2677/4216 cut-off events. [2024-06-21 16:20:19,007 INFO L125 PetriNetUnfolderBase]: For 564958/564961 co-relation queries the response was YES. [2024-06-21 16:20:19,028 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. [2024-06-21 16:20:19,042 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 175 selfloop transitions, 88 changer transitions 0/268 dead transitions. [2024-06-21 16:20:19,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 268 transitions, 2676 flow [2024-06-21 16:20:19,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:20:19,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:20:19,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-21 16:20:19,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697674418604651 [2024-06-21 16:20:19,043 INFO L175 Difference]: Start difference. First operand has 203 places, 225 transitions, 1954 flow. Second operand 10 states and 202 transitions. [2024-06-21 16:20:19,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 268 transitions, 2676 flow [2024-06-21 16:20:19,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 268 transitions, 2629 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-21 16:20:19,361 INFO L231 Difference]: Finished difference. Result has 204 places, 226 transitions, 2148 flow [2024-06-21 16:20:19,361 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} [2024-06-21 16:20:19,361 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 160 predicate places. [2024-06-21 16:20:19,362 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 226 transitions, 2148 flow [2024-06-21 16:20:19,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:19,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:19,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:19,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 16:20:19,362 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)] === [2024-06-21 16:20:19,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:19,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1347076016, now seen corresponding path program 6 times [2024-06-21 16:20:19,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:19,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241127705] [2024-06-21 16:20:19,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:19,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:19,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:20,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:20,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:20,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241127705] [2024-06-21 16:20:20,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241127705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:20,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:20,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:20:20,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514109450] [2024-06-21 16:20:20,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:20,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:20:20,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:20,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:20:20,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:20:20,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:20:20,459 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) [2024-06-21 16:20:20,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:20,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:20:20,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:21,634 INFO L124 PetriNetUnfolderBase]: 2752/4356 cut-off events. [2024-06-21 16:20:21,634 INFO L125 PetriNetUnfolderBase]: For 590201/590204 co-relation queries the response was YES. [2024-06-21 16:20:21,660 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. [2024-06-21 16:20:21,676 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 179 selfloop transitions, 86 changer transitions 0/270 dead transitions. [2024-06-21 16:20:21,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 270 transitions, 2880 flow [2024-06-21 16:20:21,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:20:21,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:20:21,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-21 16:20:21,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744186046511628 [2024-06-21 16:20:21,677 INFO L175 Difference]: Start difference. First operand has 204 places, 226 transitions, 2148 flow. Second operand 10 states and 204 transitions. [2024-06-21 16:20:21,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 270 transitions, 2880 flow [2024-06-21 16:20:22,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 270 transitions, 2671 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-21 16:20:22,147 INFO L231 Difference]: Finished difference. Result has 206 places, 227 transitions, 2178 flow [2024-06-21 16:20:22,148 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} [2024-06-21 16:20:22,148 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 162 predicate places. [2024-06-21 16:20:22,148 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 227 transitions, 2178 flow [2024-06-21 16:20:22,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:22,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:22,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:22,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 16:20:22,149 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:20:22,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:22,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1932821938, now seen corresponding path program 7 times [2024-06-21 16:20:22,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:22,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136936067] [2024-06-21 16:20:22,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:22,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:22,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:23,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:23,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:23,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136936067] [2024-06-21 16:20:23,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136936067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:23,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:23,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:20:23,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278352099] [2024-06-21 16:20:23,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:23,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:20:23,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:23,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:20:23,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:20:23,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:20:23,235 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) [2024-06-21 16:20:23,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:23,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:20:23,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:24,374 INFO L124 PetriNetUnfolderBase]: 2810/4454 cut-off events. [2024-06-21 16:20:24,374 INFO L125 PetriNetUnfolderBase]: For 599182/599185 co-relation queries the response was YES. [2024-06-21 16:20:24,402 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. [2024-06-21 16:20:24,421 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 180 selfloop transitions, 89 changer transitions 0/274 dead transitions. [2024-06-21 16:20:24,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 274 transitions, 2934 flow [2024-06-21 16:20:24,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:20:24,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:20:24,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-06-21 16:20:24,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4790697674418605 [2024-06-21 16:20:24,422 INFO L175 Difference]: Start difference. First operand has 206 places, 227 transitions, 2178 flow. Second operand 10 states and 206 transitions. [2024-06-21 16:20:24,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 274 transitions, 2934 flow [2024-06-21 16:20:24,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 274 transitions, 2727 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-21 16:20:24,950 INFO L231 Difference]: Finished difference. Result has 208 places, 228 transitions, 2217 flow [2024-06-21 16:20:24,950 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} [2024-06-21 16:20:24,950 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 164 predicate places. [2024-06-21 16:20:24,951 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 228 transitions, 2217 flow [2024-06-21 16:20:24,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:24,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:24,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:24,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 16:20:24,951 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:20:24,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:24,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1766588158, now seen corresponding path program 8 times [2024-06-21 16:20:24,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:24,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236054525] [2024-06-21 16:20:24,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:24,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:24,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:25,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:25,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:25,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236054525] [2024-06-21 16:20:25,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236054525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:25,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:25,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:20:25,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659324119] [2024-06-21 16:20:25,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:25,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:20:25,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:25,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:20:25,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:20:25,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:20:25,977 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) [2024-06-21 16:20:25,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:25,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:20:25,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:27,192 INFO L124 PetriNetUnfolderBase]: 2979/4753 cut-off events. [2024-06-21 16:20:27,192 INFO L125 PetriNetUnfolderBase]: For 667313/667316 co-relation queries the response was YES. [2024-06-21 16:20:27,222 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. [2024-06-21 16:20:27,241 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 187 selfloop transitions, 87 changer transitions 0/279 dead transitions. [2024-06-21 16:20:27,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 279 transitions, 3309 flow [2024-06-21 16:20:27,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:20:27,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:20:27,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-21 16:20:27,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4906976744186046 [2024-06-21 16:20:27,243 INFO L175 Difference]: Start difference. First operand has 208 places, 228 transitions, 2217 flow. Second operand 10 states and 211 transitions. [2024-06-21 16:20:27,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 279 transitions, 3309 flow [2024-06-21 16:20:27,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 279 transitions, 3083 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-21 16:20:27,738 INFO L231 Difference]: Finished difference. Result has 210 places, 230 transitions, 2297 flow [2024-06-21 16:20:27,738 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} [2024-06-21 16:20:27,738 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 166 predicate places. [2024-06-21 16:20:27,738 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 230 transitions, 2297 flow [2024-06-21 16:20:27,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:27,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:27,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:27,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 16:20:27,743 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:20:27,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:27,743 INFO L85 PathProgramCache]: Analyzing trace with hash -2000849034, now seen corresponding path program 9 times [2024-06-21 16:20:27,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:27,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985943586] [2024-06-21 16:20:27,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:27,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:27,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:28,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:28,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:28,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985943586] [2024-06-21 16:20:28,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985943586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:28,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:28,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:20:28,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365015664] [2024-06-21 16:20:28,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:28,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:20:28,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:28,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:20:28,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:20:28,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:20:28,785 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) [2024-06-21 16:20:28,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:28,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:20:28,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:29,869 INFO L124 PetriNetUnfolderBase]: 2943/4697 cut-off events. [2024-06-21 16:20:29,869 INFO L125 PetriNetUnfolderBase]: For 645513/645516 co-relation queries the response was YES. [2024-06-21 16:20:29,899 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. [2024-06-21 16:20:30,062 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 183 selfloop transitions, 85 changer transitions 0/273 dead transitions. [2024-06-21 16:20:30,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 273 transitions, 2977 flow [2024-06-21 16:20:30,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:20:30,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:20:30,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2024-06-21 16:20:30,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-21 16:20:30,063 INFO L175 Difference]: Start difference. First operand has 210 places, 230 transitions, 2297 flow. Second operand 10 states and 205 transitions. [2024-06-21 16:20:30,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 273 transitions, 2977 flow [2024-06-21 16:20:30,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 273 transitions, 2790 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-21 16:20:30,604 INFO L231 Difference]: Finished difference. Result has 214 places, 230 transitions, 2287 flow [2024-06-21 16:20:30,619 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} [2024-06-21 16:20:30,620 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 170 predicate places. [2024-06-21 16:20:30,620 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 230 transitions, 2287 flow [2024-06-21 16:20:30,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:30,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:30,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:30,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 16:20:30,620 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:20:30,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:30,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1824860592, now seen corresponding path program 10 times [2024-06-21 16:20:30,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:30,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388041472] [2024-06-21 16:20:30,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:30,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:30,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:31,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:31,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:31,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388041472] [2024-06-21 16:20:31,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388041472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:31,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:31,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:20:31,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398809890] [2024-06-21 16:20:31,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:31,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:20:31,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:31,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:20:31,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:20:31,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:20:31,701 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) [2024-06-21 16:20:31,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:31,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:20:31,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:32,788 INFO L124 PetriNetUnfolderBase]: 3001/4795 cut-off events. [2024-06-21 16:20:32,788 INFO L125 PetriNetUnfolderBase]: For 646035/646038 co-relation queries the response was YES. [2024-06-21 16:20:32,818 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. [2024-06-21 16:20:32,835 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 179 selfloop transitions, 94 changer transitions 0/278 dead transitions. [2024-06-21 16:20:32,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 278 transitions, 3057 flow [2024-06-21 16:20:32,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:20:32,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:20:32,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 208 transitions. [2024-06-21 16:20:32,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48372093023255813 [2024-06-21 16:20:32,837 INFO L175 Difference]: Start difference. First operand has 214 places, 230 transitions, 2287 flow. Second operand 10 states and 208 transitions. [2024-06-21 16:20:32,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 278 transitions, 3057 flow [2024-06-21 16:20:33,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 278 transitions, 2882 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-21 16:20:33,410 INFO L231 Difference]: Finished difference. Result has 215 places, 231 transitions, 2372 flow [2024-06-21 16:20:33,410 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} [2024-06-21 16:20:33,411 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 171 predicate places. [2024-06-21 16:20:33,411 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 231 transitions, 2372 flow [2024-06-21 16:20:33,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:33,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:33,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:33,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 16:20:33,412 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:20:33,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:33,412 INFO L85 PathProgramCache]: Analyzing trace with hash -133482131, now seen corresponding path program 1 times [2024-06-21 16:20:33,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:33,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544709908] [2024-06-21 16:20:33,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:33,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:33,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:33,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:33,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:33,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544709908] [2024-06-21 16:20:33,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544709908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:33,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:33,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:20:33,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097324905] [2024-06-21 16:20:33,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:33,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:20:33,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:33,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:20:33,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:20:34,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:20:34,065 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) [2024-06-21 16:20:34,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:34,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:20:34,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:34,930 INFO L124 PetriNetUnfolderBase]: 2823/4598 cut-off events. [2024-06-21 16:20:34,930 INFO L125 PetriNetUnfolderBase]: For 626782/626785 co-relation queries the response was YES. [2024-06-21 16:20:34,960 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. [2024-06-21 16:20:34,979 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 205 selfloop transitions, 19 changer transitions 0/253 dead transitions. [2024-06-21 16:20:34,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 253 transitions, 2918 flow [2024-06-21 16:20:34,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:20:34,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:20:34,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-21 16:20:34,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584717607973422 [2024-06-21 16:20:34,980 INFO L175 Difference]: Start difference. First operand has 215 places, 231 transitions, 2372 flow. Second operand 7 states and 138 transitions. [2024-06-21 16:20:34,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 253 transitions, 2918 flow [2024-06-21 16:20:35,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 253 transitions, 2678 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-21 16:20:35,528 INFO L231 Difference]: Finished difference. Result has 214 places, 234 transitions, 2232 flow [2024-06-21 16:20:35,528 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} [2024-06-21 16:20:35,528 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 170 predicate places. [2024-06-21 16:20:35,528 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 234 transitions, 2232 flow [2024-06-21 16:20:35,528 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) [2024-06-21 16:20:35,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:35,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:35,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 16:20:35,529 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:20:35,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:35,529 INFO L85 PathProgramCache]: Analyzing trace with hash -125863571, now seen corresponding path program 2 times [2024-06-21 16:20:35,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:35,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119981786] [2024-06-21 16:20:35,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:35,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:35,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:36,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:36,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:36,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119981786] [2024-06-21 16:20:36,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119981786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:36,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:36,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:20:36,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243406912] [2024-06-21 16:20:36,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:36,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:20:36,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:36,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:20:36,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:20:36,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:20:36,352 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) [2024-06-21 16:20:36,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:36,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:20:36,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:37,208 INFO L124 PetriNetUnfolderBase]: 2836/4613 cut-off events. [2024-06-21 16:20:37,209 INFO L125 PetriNetUnfolderBase]: For 635703/635706 co-relation queries the response was YES. [2024-06-21 16:20:37,239 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. [2024-06-21 16:20:37,258 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 204 selfloop transitions, 26 changer transitions 0/259 dead transitions. [2024-06-21 16:20:37,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 259 transitions, 3009 flow [2024-06-21 16:20:37,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:20:37,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:20:37,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-21 16:20:37,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45514950166112955 [2024-06-21 16:20:37,259 INFO L175 Difference]: Start difference. First operand has 214 places, 234 transitions, 2232 flow. Second operand 7 states and 137 transitions. [2024-06-21 16:20:37,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 259 transitions, 3009 flow [2024-06-21 16:20:37,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 259 transitions, 2931 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 16:20:37,782 INFO L231 Difference]: Finished difference. Result has 217 places, 242 transitions, 2358 flow [2024-06-21 16:20:37,782 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} [2024-06-21 16:20:37,783 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 173 predicate places. [2024-06-21 16:20:37,783 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 242 transitions, 2358 flow [2024-06-21 16:20:37,783 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) [2024-06-21 16:20:37,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:37,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:37,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 16:20:37,784 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:20:37,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:37,784 INFO L85 PathProgramCache]: Analyzing trace with hash 2143348108, now seen corresponding path program 1 times [2024-06-21 16:20:37,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:37,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735951409] [2024-06-21 16:20:37,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:37,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:37,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:38,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:38,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:38,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735951409] [2024-06-21 16:20:38,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735951409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:38,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:38,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:20:38,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449476037] [2024-06-21 16:20:38,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:38,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:20:38,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:38,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:20:38,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:20:38,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:20:38,911 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) [2024-06-21 16:20:38,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:38,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:20:38,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:40,188 INFO L124 PetriNetUnfolderBase]: 3036/4854 cut-off events. [2024-06-21 16:20:40,188 INFO L125 PetriNetUnfolderBase]: For 668438/668441 co-relation queries the response was YES. [2024-06-21 16:20:40,217 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. [2024-06-21 16:20:40,233 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 233 selfloop transitions, 45 changer transitions 0/283 dead transitions. [2024-06-21 16:20:40,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 283 transitions, 3102 flow [2024-06-21 16:20:40,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:20:40,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:20:40,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-21 16:20:40,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44883720930232557 [2024-06-21 16:20:40,235 INFO L175 Difference]: Start difference. First operand has 217 places, 242 transitions, 2358 flow. Second operand 10 states and 193 transitions. [2024-06-21 16:20:40,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 283 transitions, 3102 flow [2024-06-21 16:20:40,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 283 transitions, 3020 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-21 16:20:40,871 INFO L231 Difference]: Finished difference. Result has 225 places, 247 transitions, 2479 flow [2024-06-21 16:20:40,871 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} [2024-06-21 16:20:40,871 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 181 predicate places. [2024-06-21 16:20:40,871 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 247 transitions, 2479 flow [2024-06-21 16:20:40,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:40,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:40,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:40,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 16:20:40,872 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:20:40,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:40,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1554095275, now seen corresponding path program 1 times [2024-06-21 16:20:40,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:40,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181595123] [2024-06-21 16:20:40,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:40,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:40,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:41,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:41,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:41,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181595123] [2024-06-21 16:20:41,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181595123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:41,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:41,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:20:41,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808171477] [2024-06-21 16:20:41,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:41,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:20:41,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:41,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:20:41,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:20:41,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 16:20:41,903 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) [2024-06-21 16:20:41,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:41,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 16:20:41,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:42,740 INFO L124 PetriNetUnfolderBase]: 2692/4471 cut-off events. [2024-06-21 16:20:42,741 INFO L125 PetriNetUnfolderBase]: For 688465/688477 co-relation queries the response was YES. [2024-06-21 16:20:42,773 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. [2024-06-21 16:20:42,790 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 202 selfloop transitions, 21 changer transitions 0/268 dead transitions. [2024-06-21 16:20:42,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 268 transitions, 3023 flow [2024-06-21 16:20:42,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:20:42,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:20:42,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 16:20:42,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-21 16:20:42,792 INFO L175 Difference]: Start difference. First operand has 225 places, 247 transitions, 2479 flow. Second operand 8 states and 156 transitions. [2024-06-21 16:20:42,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 268 transitions, 3023 flow [2024-06-21 16:20:43,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 268 transitions, 2862 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-21 16:20:43,340 INFO L231 Difference]: Finished difference. Result has 226 places, 250 transitions, 2422 flow [2024-06-21 16:20:43,340 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} [2024-06-21 16:20:43,340 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 182 predicate places. [2024-06-21 16:20:43,340 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 250 transitions, 2422 flow [2024-06-21 16:20:43,341 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) [2024-06-21 16:20:43,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:43,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:43,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 16:20:43,341 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:20:43,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:43,341 INFO L85 PathProgramCache]: Analyzing trace with hash -73536326, now seen corresponding path program 11 times [2024-06-21 16:20:43,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:43,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244313659] [2024-06-21 16:20:43,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:43,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:43,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:44,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:44,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:44,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244313659] [2024-06-21 16:20:44,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244313659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:44,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:44,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:20:44,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615991220] [2024-06-21 16:20:44,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:44,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:20:44,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:44,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:20:44,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:20:44,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:20:44,396 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) [2024-06-21 16:20:44,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:44,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:20:44,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:45,676 INFO L124 PetriNetUnfolderBase]: 3131/5003 cut-off events. [2024-06-21 16:20:45,677 INFO L125 PetriNetUnfolderBase]: For 749895/749895 co-relation queries the response was YES. [2024-06-21 16:20:45,712 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. [2024-06-21 16:20:45,731 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 199 selfloop transitions, 87 changer transitions 0/291 dead transitions. [2024-06-21 16:20:45,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 291 transitions, 3210 flow [2024-06-21 16:20:45,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:20:45,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:20:45,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-21 16:20:45,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-21 16:20:45,733 INFO L175 Difference]: Start difference. First operand has 226 places, 250 transitions, 2422 flow. Second operand 10 states and 200 transitions. [2024-06-21 16:20:45,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 291 transitions, 3210 flow [2024-06-21 16:20:46,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 291 transitions, 3128 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-21 16:20:46,342 INFO L231 Difference]: Finished difference. Result has 230 places, 251 transitions, 2591 flow [2024-06-21 16:20:46,342 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} [2024-06-21 16:20:46,342 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 186 predicate places. [2024-06-21 16:20:46,343 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 251 transitions, 2591 flow [2024-06-21 16:20:46,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:46,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:46,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:46,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 16:20:46,347 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:20:46,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:46,347 INFO L85 PathProgramCache]: Analyzing trace with hash 100957606, now seen corresponding path program 12 times [2024-06-21 16:20:46,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:46,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735233725] [2024-06-21 16:20:46,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:46,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:46,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:47,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:47,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:47,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735233725] [2024-06-21 16:20:47,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735233725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:47,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:47,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:20:47,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723062353] [2024-06-21 16:20:47,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:47,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:20:47,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:47,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:20:47,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:20:47,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:20:47,474 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) [2024-06-21 16:20:47,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:47,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:20:47,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:48,800 INFO L124 PetriNetUnfolderBase]: 3206/5133 cut-off events. [2024-06-21 16:20:48,801 INFO L125 PetriNetUnfolderBase]: For 781454/781454 co-relation queries the response was YES. [2024-06-21 16:20:48,836 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. [2024-06-21 16:20:48,856 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 202 selfloop transitions, 86 changer transitions 0/293 dead transitions. [2024-06-21 16:20:48,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 293 transitions, 3391 flow [2024-06-21 16:20:48,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:20:48,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:20:48,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-21 16:20:48,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697674418604651 [2024-06-21 16:20:48,857 INFO L175 Difference]: Start difference. First operand has 230 places, 251 transitions, 2591 flow. Second operand 10 states and 202 transitions. [2024-06-21 16:20:48,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 293 transitions, 3391 flow [2024-06-21 16:20:49,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 293 transitions, 3172 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-21 16:20:49,568 INFO L231 Difference]: Finished difference. Result has 232 places, 252 transitions, 2623 flow [2024-06-21 16:20:49,568 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} [2024-06-21 16:20:49,569 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 188 predicate places. [2024-06-21 16:20:49,569 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 252 transitions, 2623 flow [2024-06-21 16:20:49,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:49,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:49,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:49,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 16:20:49,569 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:20:49,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:49,570 INFO L85 PathProgramCache]: Analyzing trace with hash -742282054, now seen corresponding path program 13 times [2024-06-21 16:20:49,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:49,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972758113] [2024-06-21 16:20:49,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:49,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:49,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:50,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:50,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:50,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972758113] [2024-06-21 16:20:50,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972758113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:50,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:50,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:20:50,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164601628] [2024-06-21 16:20:50,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:50,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:20:50,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:50,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:20:50,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:20:50,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:20:50,542 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) [2024-06-21 16:20:50,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:50,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:20:50,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:52,076 INFO L124 PetriNetUnfolderBase]: 3281/5268 cut-off events. [2024-06-21 16:20:52,076 INFO L125 PetriNetUnfolderBase]: For 803835/803835 co-relation queries the response was YES. [2024-06-21 16:20:52,128 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. [2024-06-21 16:20:52,150 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 191 selfloop transitions, 96 changer transitions 0/292 dead transitions. [2024-06-21 16:20:52,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 292 transitions, 3411 flow [2024-06-21 16:20:52,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:20:52,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:20:52,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-21 16:20:52,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-21 16:20:52,152 INFO L175 Difference]: Start difference. First operand has 232 places, 252 transitions, 2623 flow. Second operand 10 states and 196 transitions. [2024-06-21 16:20:52,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 292 transitions, 3411 flow [2024-06-21 16:20:52,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 292 transitions, 3192 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-21 16:20:52,992 INFO L231 Difference]: Finished difference. Result has 234 places, 253 transitions, 2677 flow [2024-06-21 16:20:52,992 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} [2024-06-21 16:20:52,992 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 190 predicate places. [2024-06-21 16:20:52,993 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 253 transitions, 2677 flow [2024-06-21 16:20:52,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:52,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:52,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:52,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 16:20:52,993 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:20:52,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:52,993 INFO L85 PathProgramCache]: Analyzing trace with hash -2134292406, now seen corresponding path program 14 times [2024-06-21 16:20:52,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:52,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653284026] [2024-06-21 16:20:52,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:52,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:53,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:53,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:53,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:53,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653284026] [2024-06-21 16:20:53,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653284026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:53,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:53,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:20:53,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144769152] [2024-06-21 16:20:53,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:53,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:20:53,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:53,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:20:53,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:20:53,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:20:53,963 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) [2024-06-21 16:20:53,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:53,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:20:53,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:55,279 INFO L124 PetriNetUnfolderBase]: 3339/5371 cut-off events. [2024-06-21 16:20:55,279 INFO L125 PetriNetUnfolderBase]: For 812614/812614 co-relation queries the response was YES. [2024-06-21 16:20:55,318 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. [2024-06-21 16:20:55,340 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 204 selfloop transitions, 89 changer transitions 0/298 dead transitions. [2024-06-21 16:20:55,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 298 transitions, 3505 flow [2024-06-21 16:20:55,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:20:55,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:20:55,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-21 16:20:55,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744186046511628 [2024-06-21 16:20:55,342 INFO L175 Difference]: Start difference. First operand has 234 places, 253 transitions, 2677 flow. Second operand 10 states and 204 transitions. [2024-06-21 16:20:55,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 298 transitions, 3505 flow [2024-06-21 16:20:55,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 298 transitions, 3264 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-21 16:20:55,901 INFO L231 Difference]: Finished difference. Result has 236 places, 254 transitions, 2696 flow [2024-06-21 16:20:55,901 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} [2024-06-21 16:20:55,901 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 192 predicate places. [2024-06-21 16:20:55,901 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 254 transitions, 2696 flow [2024-06-21 16:20:55,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:55,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:55,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:55,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 16:20:55,902 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:20:55,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:55,902 INFO L85 PathProgramCache]: Analyzing trace with hash -65453804, now seen corresponding path program 15 times [2024-06-21 16:20:55,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:55,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35490531] [2024-06-21 16:20:55,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:55,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:55,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:56,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:56,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:56,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35490531] [2024-06-21 16:20:56,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35490531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:56,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:56,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:20:56,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398351227] [2024-06-21 16:20:56,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:56,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:20:56,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:56,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:20:56,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:20:56,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:20:56,966 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) [2024-06-21 16:20:56,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:56,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:20:56,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:58,268 INFO L124 PetriNetUnfolderBase]: 3508/5665 cut-off events. [2024-06-21 16:20:58,268 INFO L125 PetriNetUnfolderBase]: For 900867/900867 co-relation queries the response was YES. [2024-06-21 16:20:58,310 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. [2024-06-21 16:20:58,333 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 206 selfloop transitions, 91 changer transitions 0/302 dead transitions. [2024-06-21 16:20:58,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 302 transitions, 3906 flow [2024-06-21 16:20:58,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:20:58,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:20:58,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2024-06-21 16:20:58,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-21 16:20:58,335 INFO L175 Difference]: Start difference. First operand has 236 places, 254 transitions, 2696 flow. Second operand 10 states and 205 transitions. [2024-06-21 16:20:58,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 302 transitions, 3906 flow [2024-06-21 16:20:59,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 302 transitions, 3666 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-21 16:20:59,400 INFO L231 Difference]: Finished difference. Result has 238 places, 256 transitions, 2798 flow [2024-06-21 16:20:59,400 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} [2024-06-21 16:20:59,401 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 194 predicate places. [2024-06-21 16:20:59,401 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 256 transitions, 2798 flow [2024-06-21 16:20:59,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:59,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:59,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:59,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 16:20:59,402 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:20:59,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:59,402 INFO L85 PathProgramCache]: Analyzing trace with hash -246026216, now seen corresponding path program 16 times [2024-06-21 16:20:59,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:59,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441828948] [2024-06-21 16:20:59,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:59,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:59,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:00,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:00,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:00,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441828948] [2024-06-21 16:21:00,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441828948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:00,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:00,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:21:00,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661668914] [2024-06-21 16:21:00,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:00,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:21:00,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:00,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:21:00,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:21:00,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:21:00,356 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) [2024-06-21 16:21:00,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:00,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:21:00,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:01,759 INFO L124 PetriNetUnfolderBase]: 3472/5609 cut-off events. [2024-06-21 16:21:01,759 INFO L125 PetriNetUnfolderBase]: For 867866/867866 co-relation queries the response was YES. [2024-06-21 16:21:01,805 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. [2024-06-21 16:21:01,829 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 202 selfloop transitions, 89 changer transitions 0/296 dead transitions. [2024-06-21 16:21:01,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 296 transitions, 3528 flow [2024-06-21 16:21:01,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:21:01,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:21:01,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-21 16:21:01,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4627906976744186 [2024-06-21 16:21:01,831 INFO L175 Difference]: Start difference. First operand has 238 places, 256 transitions, 2798 flow. Second operand 10 states and 199 transitions. [2024-06-21 16:21:01,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 296 transitions, 3528 flow [2024-06-21 16:21:02,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 296 transitions, 3308 flow, removed 59 selfloop flow, removed 6 redundant places. [2024-06-21 16:21:02,633 INFO L231 Difference]: Finished difference. Result has 242 places, 256 transitions, 2763 flow [2024-06-21 16:21:02,633 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} [2024-06-21 16:21:02,633 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 198 predicate places. [2024-06-21 16:21:02,633 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 256 transitions, 2763 flow [2024-06-21 16:21:02,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:02,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:02,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:02,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 16:21:02,634 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:21:02,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:02,634 INFO L85 PathProgramCache]: Analyzing trace with hash -70037774, now seen corresponding path program 17 times [2024-06-21 16:21:02,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:02,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624927620] [2024-06-21 16:21:02,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:02,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:02,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:03,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:03,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:03,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624927620] [2024-06-21 16:21:03,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624927620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:03,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:03,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:21:03,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002781434] [2024-06-21 16:21:03,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:03,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:21:03,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:03,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:21:03,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:21:03,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:21:03,569 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) [2024-06-21 16:21:03,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:03,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:21:03,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:04,881 INFO L124 PetriNetUnfolderBase]: 3591/5810 cut-off events. [2024-06-21 16:21:04,881 INFO L125 PetriNetUnfolderBase]: For 907436/907436 co-relation queries the response was YES. [2024-06-21 16:21:04,926 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. [2024-06-21 16:21:04,950 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 198 selfloop transitions, 101 changer transitions 0/304 dead transitions. [2024-06-21 16:21:04,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 304 transitions, 3985 flow [2024-06-21 16:21:04,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:21:04,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:21:04,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-21 16:21:04,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744186046511628 [2024-06-21 16:21:04,951 INFO L175 Difference]: Start difference. First operand has 242 places, 256 transitions, 2763 flow. Second operand 10 states and 204 transitions. [2024-06-21 16:21:04,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 304 transitions, 3985 flow [2024-06-21 16:21:06,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 304 transitions, 3800 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 16:21:06,024 INFO L231 Difference]: Finished difference. Result has 243 places, 258 transitions, 2944 flow [2024-06-21 16:21:06,024 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} [2024-06-21 16:21:06,025 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 199 predicate places. [2024-06-21 16:21:06,025 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 258 transitions, 2944 flow [2024-06-21 16:21:06,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:06,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:06,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:06,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 16:21:06,026 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:21:06,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:06,026 INFO L85 PathProgramCache]: Analyzing trace with hash 70457680, now seen corresponding path program 18 times [2024-06-21 16:21:06,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:06,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346056809] [2024-06-21 16:21:06,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:06,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:06,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:06,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:06,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:06,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346056809] [2024-06-21 16:21:06,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346056809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:06,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:06,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:21:06,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816237081] [2024-06-21 16:21:06,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:06,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:21:06,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:06,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:21:06,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:21:07,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:21:07,153 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) [2024-06-21 16:21:07,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:07,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:21:07,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:08,718 INFO L124 PetriNetUnfolderBase]: 3666/5935 cut-off events. [2024-06-21 16:21:08,718 INFO L125 PetriNetUnfolderBase]: For 956294/956294 co-relation queries the response was YES. [2024-06-21 16:21:08,760 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. [2024-06-21 16:21:08,784 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 204 selfloop transitions, 90 changer transitions 0/299 dead transitions. [2024-06-21 16:21:08,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 299 transitions, 3760 flow [2024-06-21 16:21:08,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:21:08,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:21:08,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-21 16:21:08,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4604651162790698 [2024-06-21 16:21:08,786 INFO L175 Difference]: Start difference. First operand has 243 places, 258 transitions, 2944 flow. Second operand 10 states and 198 transitions. [2024-06-21 16:21:08,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 299 transitions, 3760 flow [2024-06-21 16:21:09,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 299 transitions, 3563 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-21 16:21:09,641 INFO L231 Difference]: Finished difference. Result has 247 places, 259 transitions, 3016 flow [2024-06-21 16:21:09,642 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} [2024-06-21 16:21:09,642 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 203 predicate places. [2024-06-21 16:21:09,642 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 259 transitions, 3016 flow [2024-06-21 16:21:09,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:09,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:09,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:09,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 16:21:09,661 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:21:09,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:09,662 INFO L85 PathProgramCache]: Analyzing trace with hash -103863272, now seen corresponding path program 19 times [2024-06-21 16:21:09,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:09,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102064633] [2024-06-21 16:21:09,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:09,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:09,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:10,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:10,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:10,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102064633] [2024-06-21 16:21:10,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102064633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:10,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:10,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:21:10,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836850538] [2024-06-21 16:21:10,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:10,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:21:10,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:10,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:21:10,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:21:10,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:21:10,806 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) [2024-06-21 16:21:10,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:10,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:21:10,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:12,258 INFO L124 PetriNetUnfolderBase]: 3716/6031 cut-off events. [2024-06-21 16:21:12,258 INFO L125 PetriNetUnfolderBase]: For 954522/954522 co-relation queries the response was YES. [2024-06-21 16:21:12,308 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. [2024-06-21 16:21:12,335 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 206 selfloop transitions, 89 changer transitions 0/300 dead transitions. [2024-06-21 16:21:12,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 300 transitions, 3824 flow [2024-06-21 16:21:12,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:21:12,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:21:12,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-21 16:21:12,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4627906976744186 [2024-06-21 16:21:12,337 INFO L175 Difference]: Start difference. First operand has 247 places, 259 transitions, 3016 flow. Second operand 10 states and 199 transitions. [2024-06-21 16:21:12,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 300 transitions, 3824 flow [2024-06-21 16:21:13,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 300 transitions, 3601 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-21 16:21:13,186 INFO L231 Difference]: Finished difference. Result has 249 places, 260 transitions, 3050 flow [2024-06-21 16:21:13,187 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} [2024-06-21 16:21:13,187 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 205 predicate places. [2024-06-21 16:21:13,187 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 260 transitions, 3050 flow [2024-06-21 16:21:13,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:13,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:13,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:13,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 16:21:13,188 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:21:13,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:13,188 INFO L85 PathProgramCache]: Analyzing trace with hash -110297012, now seen corresponding path program 20 times [2024-06-21 16:21:13,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:13,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970786432] [2024-06-21 16:21:13,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:13,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:13,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:14,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:14,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:14,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970786432] [2024-06-21 16:21:14,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970786432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:14,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:14,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:21:14,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88878669] [2024-06-21 16:21:14,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:14,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:21:14,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:14,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:21:14,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:21:14,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:21:14,305 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) [2024-06-21 16:21:14,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:14,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:21:14,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:15,709 INFO L124 PetriNetUnfolderBase]: 3688/5987 cut-off events. [2024-06-21 16:21:15,709 INFO L125 PetriNetUnfolderBase]: For 905164/905164 co-relation queries the response was YES. [2024-06-21 16:21:15,754 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. [2024-06-21 16:21:15,777 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 204 selfloop transitions, 94 changer transitions 0/303 dead transitions. [2024-06-21 16:21:15,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 303 transitions, 3808 flow [2024-06-21 16:21:15,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:21:15,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:21:15,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-21 16:21:15,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-21 16:21:15,779 INFO L175 Difference]: Start difference. First operand has 249 places, 260 transitions, 3050 flow. Second operand 10 states and 200 transitions. [2024-06-21 16:21:15,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 303 transitions, 3808 flow [2024-06-21 16:21:16,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 303 transitions, 3557 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-21 16:21:16,595 INFO L231 Difference]: Finished difference. Result has 251 places, 260 transitions, 2993 flow [2024-06-21 16:21:16,595 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} [2024-06-21 16:21:16,595 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 207 predicate places. [2024-06-21 16:21:16,595 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 260 transitions, 2993 flow [2024-06-21 16:21:16,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:16,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:16,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:16,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 16:21:16,596 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:21:16,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:16,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1187405271, now seen corresponding path program 3 times [2024-06-21 16:21:16,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:16,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345981834] [2024-06-21 16:21:16,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:16,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:16,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:17,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:17,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:17,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345981834] [2024-06-21 16:21:17,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345981834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:17,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:17,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:21:17,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11541695] [2024-06-21 16:21:17,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:17,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:21:17,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:17,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:21:17,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:21:17,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:21:17,279 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) [2024-06-21 16:21:17,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:17,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:21:17,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:18,350 INFO L124 PetriNetUnfolderBase]: 3465/5716 cut-off events. [2024-06-21 16:21:18,350 INFO L125 PetriNetUnfolderBase]: For 854552/854557 co-relation queries the response was YES. [2024-06-21 16:21:18,399 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. [2024-06-21 16:21:18,427 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 229 selfloop transitions, 19 changer transitions 0/277 dead transitions. [2024-06-21 16:21:18,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 277 transitions, 3536 flow [2024-06-21 16:21:18,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:21:18,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:21:18,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-21 16:21:18,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4485049833887043 [2024-06-21 16:21:18,428 INFO L175 Difference]: Start difference. First operand has 251 places, 260 transitions, 2993 flow. Second operand 7 states and 135 transitions. [2024-06-21 16:21:18,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 277 transitions, 3536 flow [2024-06-21 16:21:19,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 277 transitions, 3188 flow, removed 30 selfloop flow, removed 10 redundant places. [2024-06-21 16:21:19,349 INFO L231 Difference]: Finished difference. Result has 248 places, 261 transitions, 2698 flow [2024-06-21 16:21:19,349 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} [2024-06-21 16:21:19,350 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 204 predicate places. [2024-06-21 16:21:19,350 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 261 transitions, 2698 flow [2024-06-21 16:21:19,350 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) [2024-06-21 16:21:19,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:19,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:19,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 16:21:19,350 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:21:19,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:19,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1187850741, now seen corresponding path program 4 times [2024-06-21 16:21:19,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:19,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058844514] [2024-06-21 16:21:19,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:19,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:19,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:20,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:20,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:20,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058844514] [2024-06-21 16:21:20,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058844514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:20,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:20,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:21:20,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428465487] [2024-06-21 16:21:20,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:20,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:21:20,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:20,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:21:20,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:21:20,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:21:20,102 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) [2024-06-21 16:21:20,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:20,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:21:20,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:21,086 INFO L124 PetriNetUnfolderBase]: 3470/5718 cut-off events. [2024-06-21 16:21:21,086 INFO L125 PetriNetUnfolderBase]: For 866687/866692 co-relation queries the response was YES. [2024-06-21 16:21:21,134 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. [2024-06-21 16:21:21,159 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 221 selfloop transitions, 27 changer transitions 0/277 dead transitions. [2024-06-21 16:21:21,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 277 transitions, 3290 flow [2024-06-21 16:21:21,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:21:21,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:21:21,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-21 16:21:21,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 16:21:21,160 INFO L175 Difference]: Start difference. First operand has 248 places, 261 transitions, 2698 flow. Second operand 7 states and 133 transitions. [2024-06-21 16:21:21,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 277 transitions, 3290 flow [2024-06-21 16:21:22,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 277 transitions, 3248 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 16:21:22,033 INFO L231 Difference]: Finished difference. Result has 250 places, 264 transitions, 2786 flow [2024-06-21 16:21:22,033 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} [2024-06-21 16:21:22,033 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 206 predicate places. [2024-06-21 16:21:22,033 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 264 transitions, 2786 flow [2024-06-21 16:21:22,034 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) [2024-06-21 16:21:22,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:22,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:22,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 16:21:22,034 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)] === [2024-06-21 16:21:22,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:22,034 INFO L85 PathProgramCache]: Analyzing trace with hash 107459980, now seen corresponding path program 2 times [2024-06-21 16:21:22,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:22,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121694478] [2024-06-21 16:21:22,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:22,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:22,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:23,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:23,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:23,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121694478] [2024-06-21 16:21:23,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121694478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:23,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:23,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:21:23,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662647042] [2024-06-21 16:21:23,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:23,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:21:23,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:23,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:21:23,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:21:23,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:21:23,292 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) [2024-06-21 16:21:23,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:23,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:21:23,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:24,817 INFO L124 PetriNetUnfolderBase]: 3707/6033 cut-off events. [2024-06-21 16:21:24,817 INFO L125 PetriNetUnfolderBase]: For 900909/900914 co-relation queries the response was YES. [2024-06-21 16:21:24,857 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. [2024-06-21 16:21:24,878 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 250 selfloop transitions, 47 changer transitions 0/302 dead transitions. [2024-06-21 16:21:24,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 302 transitions, 3581 flow [2024-06-21 16:21:24,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:21:24,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:21:24,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-21 16:21:24,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 16:21:24,879 INFO L175 Difference]: Start difference. First operand has 250 places, 264 transitions, 2786 flow. Second operand 10 states and 190 transitions. [2024-06-21 16:21:24,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 302 transitions, 3581 flow [2024-06-21 16:21:25,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 302 transitions, 3473 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-21 16:21:25,591 INFO L231 Difference]: Finished difference. Result has 256 places, 269 transitions, 2904 flow [2024-06-21 16:21:25,592 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} [2024-06-21 16:21:25,592 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 212 predicate places. [2024-06-21 16:21:25,592 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 269 transitions, 2904 flow [2024-06-21 16:21:25,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:25,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:25,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:25,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 16:21:25,593 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)] === [2024-06-21 16:21:25,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:25,593 INFO L85 PathProgramCache]: Analyzing trace with hash -276185878, now seen corresponding path program 3 times [2024-06-21 16:21:25,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:25,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498366857] [2024-06-21 16:21:25,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:25,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:25,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:26,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:26,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:26,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498366857] [2024-06-21 16:21:26,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498366857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:26,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:26,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:21:26,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407126536] [2024-06-21 16:21:26,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:26,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:21:26,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:26,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:21:26,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:21:26,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:21:26,740 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) [2024-06-21 16:21:26,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:26,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:21:26,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:28,089 INFO L124 PetriNetUnfolderBase]: 3735/6101 cut-off events. [2024-06-21 16:21:28,089 INFO L125 PetriNetUnfolderBase]: For 925493/925498 co-relation queries the response was YES. [2024-06-21 16:21:28,136 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. [2024-06-21 16:21:28,159 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 247 selfloop transitions, 59 changer transitions 0/311 dead transitions. [2024-06-21 16:21:28,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 311 transitions, 3769 flow [2024-06-21 16:21:28,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:21:28,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:21:28,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-21 16:21:28,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43488372093023253 [2024-06-21 16:21:28,160 INFO L175 Difference]: Start difference. First operand has 256 places, 269 transitions, 2904 flow. Second operand 10 states and 187 transitions. [2024-06-21 16:21:28,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 311 transitions, 3769 flow [2024-06-21 16:21:29,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 311 transitions, 3572 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-21 16:21:29,144 INFO L231 Difference]: Finished difference. Result has 260 places, 279 transitions, 3028 flow [2024-06-21 16:21:29,145 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} [2024-06-21 16:21:29,145 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 216 predicate places. [2024-06-21 16:21:29,145 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 279 transitions, 3028 flow [2024-06-21 16:21:29,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:29,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:29,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:29,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 16:21:29,146 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)] === [2024-06-21 16:21:29,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:29,146 INFO L85 PathProgramCache]: Analyzing trace with hash 77133034, now seen corresponding path program 4 times [2024-06-21 16:21:29,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:29,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970109038] [2024-06-21 16:21:29,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:29,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:29,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:30,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:30,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:30,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970109038] [2024-06-21 16:21:30,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970109038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:30,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:30,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:21:30,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362944420] [2024-06-21 16:21:30,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:30,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:21:30,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:30,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:21:30,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:21:30,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:21:30,369 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) [2024-06-21 16:21:30,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:30,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:21:30,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:31,874 INFO L124 PetriNetUnfolderBase]: 3752/6100 cut-off events. [2024-06-21 16:21:31,874 INFO L125 PetriNetUnfolderBase]: For 947780/947785 co-relation queries the response was YES. [2024-06-21 16:21:31,925 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. [2024-06-21 16:21:31,950 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 254 selfloop transitions, 55 changer transitions 0/314 dead transitions. [2024-06-21 16:21:31,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 314 transitions, 3839 flow [2024-06-21 16:21:31,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:21:31,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:21:31,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-21 16:21:31,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43953488372093025 [2024-06-21 16:21:31,952 INFO L175 Difference]: Start difference. First operand has 260 places, 279 transitions, 3028 flow. Second operand 10 states and 189 transitions. [2024-06-21 16:21:31,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 314 transitions, 3839 flow [2024-06-21 16:21:32,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 314 transitions, 3664 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-21 16:21:32,740 INFO L231 Difference]: Finished difference. Result has 266 places, 282 transitions, 3093 flow [2024-06-21 16:21:32,740 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} [2024-06-21 16:21:32,741 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 222 predicate places. [2024-06-21 16:21:32,741 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 282 transitions, 3093 flow [2024-06-21 16:21:32,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:32,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:32,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:32,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 16:21:32,741 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)] === [2024-06-21 16:21:32,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:32,742 INFO L85 PathProgramCache]: Analyzing trace with hash -446460400, now seen corresponding path program 5 times [2024-06-21 16:21:32,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:32,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704294389] [2024-06-21 16:21:32,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:32,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:32,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:33,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:33,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:33,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704294389] [2024-06-21 16:21:33,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704294389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:33,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:33,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:21:33,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594587762] [2024-06-21 16:21:33,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:33,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:21:33,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:33,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:21:33,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:21:33,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:21:33,977 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) [2024-06-21 16:21:33,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:33,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:21:33,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:35,483 INFO L124 PetriNetUnfolderBase]: 3769/6127 cut-off events. [2024-06-21 16:21:35,483 INFO L125 PetriNetUnfolderBase]: For 966706/966711 co-relation queries the response was YES. [2024-06-21 16:21:35,530 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. [2024-06-21 16:21:35,554 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 245 selfloop transitions, 71 changer transitions 0/321 dead transitions. [2024-06-21 16:21:35,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 321 transitions, 4355 flow [2024-06-21 16:21:35,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:21:35,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:21:35,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-21 16:21:35,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 16:21:35,555 INFO L175 Difference]: Start difference. First operand has 266 places, 282 transitions, 3093 flow. Second operand 10 states and 190 transitions. [2024-06-21 16:21:35,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 321 transitions, 4355 flow [2024-06-21 16:21:36,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 321 transitions, 4146 flow, removed 52 selfloop flow, removed 7 redundant places. [2024-06-21 16:21:36,401 INFO L231 Difference]: Finished difference. Result has 269 places, 286 transitions, 3249 flow [2024-06-21 16:21:36,401 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} [2024-06-21 16:21:36,401 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 225 predicate places. [2024-06-21 16:21:36,402 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 286 transitions, 3249 flow [2024-06-21 16:21:36,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:36,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:36,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:36,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 16:21:36,402 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:21:36,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:36,402 INFO L85 PathProgramCache]: Analyzing trace with hash -742035790, now seen corresponding path program 6 times [2024-06-21 16:21:36,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:36,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510976093] [2024-06-21 16:21:36,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:36,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:36,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:37,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:37,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:37,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510976093] [2024-06-21 16:21:37,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510976093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:37,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:37,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:21:37,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111993182] [2024-06-21 16:21:37,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:37,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:21:37,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:37,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:21:37,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:21:37,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:21:37,585 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) [2024-06-21 16:21:37,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:37,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:21:37,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:39,060 INFO L124 PetriNetUnfolderBase]: 3761/6135 cut-off events. [2024-06-21 16:21:39,060 INFO L125 PetriNetUnfolderBase]: For 970697/970702 co-relation queries the response was YES. [2024-06-21 16:21:39,113 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. [2024-06-21 16:21:39,139 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 256 selfloop transitions, 57 changer transitions 0/318 dead transitions. [2024-06-21 16:21:39,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 318 transitions, 3955 flow [2024-06-21 16:21:39,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:21:39,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:21:39,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-21 16:21:39,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4372093023255814 [2024-06-21 16:21:39,140 INFO L175 Difference]: Start difference. First operand has 269 places, 286 transitions, 3249 flow. Second operand 10 states and 188 transitions. [2024-06-21 16:21:39,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 318 transitions, 3955 flow [2024-06-21 16:21:40,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 318 transitions, 3697 flow, removed 93 selfloop flow, removed 6 redundant places. [2024-06-21 16:21:40,722 INFO L231 Difference]: Finished difference. Result has 273 places, 286 transitions, 3112 flow [2024-06-21 16:21:40,723 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} [2024-06-21 16:21:40,723 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 229 predicate places. [2024-06-21 16:21:40,723 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 286 transitions, 3112 flow [2024-06-21 16:21:40,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:40,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:40,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:40,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 16:21:40,724 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:21:40,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:40,724 INFO L85 PathProgramCache]: Analyzing trace with hash -80647691, now seen corresponding path program 5 times [2024-06-21 16:21:40,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:40,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59761561] [2024-06-21 16:21:40,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:40,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:40,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:41,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:41,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:41,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59761561] [2024-06-21 16:21:41,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59761561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:41,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:41,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:21:41,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659409172] [2024-06-21 16:21:41,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:41,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:21:41,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:41,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:21:41,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:21:41,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:21:41,477 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) [2024-06-21 16:21:41,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:41,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:21:41,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:42,492 INFO L124 PetriNetUnfolderBase]: 3546/5865 cut-off events. [2024-06-21 16:21:42,493 INFO L125 PetriNetUnfolderBase]: For 968453/968461 co-relation queries the response was YES. [2024-06-21 16:21:42,543 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. [2024-06-21 16:21:42,566 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 233 selfloop transitions, 44 changer transitions 0/306 dead transitions. [2024-06-21 16:21:42,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 306 transitions, 4075 flow [2024-06-21 16:21:42,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:21:42,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:21:42,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-21 16:21:42,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 16:21:42,568 INFO L175 Difference]: Start difference. First operand has 273 places, 286 transitions, 3112 flow. Second operand 7 states and 133 transitions. [2024-06-21 16:21:42,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 306 transitions, 4075 flow [2024-06-21 16:21:44,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 306 transitions, 3886 flow, removed 13 selfloop flow, removed 13 redundant places. [2024-06-21 16:21:44,073 INFO L231 Difference]: Finished difference. Result has 268 places, 295 transitions, 3244 flow [2024-06-21 16:21:44,074 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} [2024-06-21 16:21:44,074 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 224 predicate places. [2024-06-21 16:21:44,074 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 295 transitions, 3244 flow [2024-06-21 16:21:44,074 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) [2024-06-21 16:21:44,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:44,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:44,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 16:21:44,081 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:21:44,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:44,082 INFO L85 PathProgramCache]: Analyzing trace with hash -86361611, now seen corresponding path program 6 times [2024-06-21 16:21:44,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:44,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803339394] [2024-06-21 16:21:44,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:44,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:44,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:44,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:44,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:44,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803339394] [2024-06-21 16:21:44,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803339394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:44,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:44,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:21:44,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806369547] [2024-06-21 16:21:44,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:44,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:21:44,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:44,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:21:44,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:21:44,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:21:44,852 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) [2024-06-21 16:21:44,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:44,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:21:44,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:45,858 INFO L124 PetriNetUnfolderBase]: 3543/5847 cut-off events. [2024-06-21 16:21:45,858 INFO L125 PetriNetUnfolderBase]: For 985745/985753 co-relation queries the response was YES. [2024-06-21 16:21:45,908 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. [2024-06-21 16:21:45,932 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 232 selfloop transitions, 44 changer transitions 0/305 dead transitions. [2024-06-21 16:21:45,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 305 transitions, 3820 flow [2024-06-21 16:21:45,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:21:45,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:21:45,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-21 16:21:45,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43853820598006643 [2024-06-21 16:21:45,934 INFO L175 Difference]: Start difference. First operand has 268 places, 295 transitions, 3244 flow. Second operand 7 states and 132 transitions. [2024-06-21 16:21:45,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 305 transitions, 3820 flow [2024-06-21 16:21:47,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 305 transitions, 3652 flow, removed 77 selfloop flow, removed 2 redundant places. [2024-06-21 16:21:47,389 INFO L231 Difference]: Finished difference. Result has 273 places, 295 transitions, 3170 flow [2024-06-21 16:21:47,390 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} [2024-06-21 16:21:47,390 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 229 predicate places. [2024-06-21 16:21:47,390 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 295 transitions, 3170 flow [2024-06-21 16:21:47,390 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) [2024-06-21 16:21:47,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:47,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:47,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 16:21:47,391 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:21:47,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:47,391 INFO L85 PathProgramCache]: Analyzing trace with hash -86351691, now seen corresponding path program 2 times [2024-06-21 16:21:47,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:47,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213912754] [2024-06-21 16:21:47,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:47,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:47,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:48,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:48,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:48,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213912754] [2024-06-21 16:21:48,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213912754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:48,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:48,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:21:48,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449119512] [2024-06-21 16:21:48,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:48,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:21:48,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:48,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:21:48,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:21:48,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 16:21:48,523 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) [2024-06-21 16:21:48,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:48,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 16:21:48,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:49,712 INFO L124 PetriNetUnfolderBase]: 3391/5688 cut-off events. [2024-06-21 16:21:49,712 INFO L125 PetriNetUnfolderBase]: For 1023317/1023317 co-relation queries the response was YES. [2024-06-21 16:21:49,758 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. [2024-06-21 16:21:49,781 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 223 selfloop transitions, 28 changer transitions 0/310 dead transitions. [2024-06-21 16:21:49,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 310 transitions, 3760 flow [2024-06-21 16:21:49,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:21:49,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:21:49,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 16:21:49,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 16:21:49,782 INFO L175 Difference]: Start difference. First operand has 273 places, 295 transitions, 3170 flow. Second operand 8 states and 152 transitions. [2024-06-21 16:21:49,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 310 transitions, 3760 flow [2024-06-21 16:21:51,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 310 transitions, 3640 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 16:21:51,365 INFO L231 Difference]: Finished difference. Result has 275 places, 298 transitions, 3174 flow [2024-06-21 16:21:51,365 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} [2024-06-21 16:21:51,365 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 231 predicate places. [2024-06-21 16:21:51,365 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 298 transitions, 3174 flow [2024-06-21 16:21:51,365 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) [2024-06-21 16:21:51,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:51,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:51,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 16:21:51,366 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:21:51,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:51,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1110761485, now seen corresponding path program 3 times [2024-06-21 16:21:51,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:51,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719856966] [2024-06-21 16:21:51,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:51,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:51,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:52,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:52,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:52,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719856966] [2024-06-21 16:21:52,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719856966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:52,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:52,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:21:52,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385058692] [2024-06-21 16:21:52,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:52,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:21:52,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:52,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:21:52,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:21:52,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 16:21:52,563 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) [2024-06-21 16:21:52,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:52,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 16:21:52,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:53,670 INFO L124 PetriNetUnfolderBase]: 3383/5693 cut-off events. [2024-06-21 16:21:53,671 INFO L125 PetriNetUnfolderBase]: For 1034038/1034060 co-relation queries the response was YES. [2024-06-21 16:21:53,724 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. [2024-06-21 16:21:53,751 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 239 selfloop transitions, 17 changer transitions 0/315 dead transitions. [2024-06-21 16:21:53,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 315 transitions, 3793 flow [2024-06-21 16:21:53,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:21:53,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:21:53,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 16:21:53,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-21 16:21:53,752 INFO L175 Difference]: Start difference. First operand has 275 places, 298 transitions, 3174 flow. Second operand 8 states and 149 transitions. [2024-06-21 16:21:53,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 315 transitions, 3793 flow [2024-06-21 16:21:55,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 315 transitions, 3691 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-21 16:21:55,244 INFO L231 Difference]: Finished difference. Result has 278 places, 304 transitions, 3207 flow [2024-06-21 16:21:55,244 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} [2024-06-21 16:21:55,244 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 234 predicate places. [2024-06-21 16:21:55,244 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 304 transitions, 3207 flow [2024-06-21 16:21:55,244 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) [2024-06-21 16:21:55,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:55,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:55,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 16:21:55,245 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:21:55,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:55,245 INFO L85 PathProgramCache]: Analyzing trace with hash -71619561, now seen corresponding path program 4 times [2024-06-21 16:21:55,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:55,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085003908] [2024-06-21 16:21:55,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:55,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:55,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:56,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:56,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:56,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085003908] [2024-06-21 16:21:56,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085003908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:56,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:56,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:21:56,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009831011] [2024-06-21 16:21:56,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:56,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:21:56,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:56,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:21:56,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:21:56,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 16:21:56,325 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) [2024-06-21 16:21:56,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:56,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 16:21:56,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:57,378 INFO L124 PetriNetUnfolderBase]: 3393/5689 cut-off events. [2024-06-21 16:21:57,378 INFO L125 PetriNetUnfolderBase]: For 1057174/1057212 co-relation queries the response was YES. [2024-06-21 16:21:57,429 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. [2024-06-21 16:21:57,458 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 216 selfloop transitions, 49 changer transitions 0/324 dead transitions. [2024-06-21 16:21:57,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 324 transitions, 4111 flow [2024-06-21 16:21:57,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:21:57,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:21:57,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-21 16:21:57,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-21 16:21:57,459 INFO L175 Difference]: Start difference. First operand has 278 places, 304 transitions, 3207 flow. Second operand 8 states and 158 transitions. [2024-06-21 16:21:57,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 324 transitions, 4111 flow [2024-06-21 16:21:59,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 324 transitions, 4023 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-21 16:21:59,311 INFO L231 Difference]: Finished difference. Result has 282 places, 310 transitions, 3361 flow [2024-06-21 16:21:59,312 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} [2024-06-21 16:21:59,312 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 238 predicate places. [2024-06-21 16:21:59,312 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 310 transitions, 3361 flow [2024-06-21 16:21:59,312 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) [2024-06-21 16:21:59,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:59,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:59,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 16:21:59,313 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:21:59,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:59,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1376994569, now seen corresponding path program 1 times [2024-06-21 16:21:59,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:59,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928631233] [2024-06-21 16:21:59,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:59,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:59,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:59,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:59,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:59,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928631233] [2024-06-21 16:21:59,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928631233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:59,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:59,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:21:59,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206726594] [2024-06-21 16:21:59,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:59,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:21:59,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:59,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:21:59,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:21:59,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:21:59,983 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) [2024-06-21 16:21:59,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:59,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:21:59,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:01,305 INFO L124 PetriNetUnfolderBase]: 3664/6045 cut-off events. [2024-06-21 16:22:01,305 INFO L125 PetriNetUnfolderBase]: For 1067913/1067915 co-relation queries the response was YES. [2024-06-21 16:22:01,358 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. [2024-06-21 16:22:01,388 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 307 selfloop transitions, 17 changer transitions 0/334 dead transitions. [2024-06-21 16:22:01,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 334 transitions, 4127 flow [2024-06-21 16:22:01,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:22:01,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:22:01,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 16:22:01,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 16:22:01,389 INFO L175 Difference]: Start difference. First operand has 282 places, 310 transitions, 3361 flow. Second operand 8 states and 152 transitions. [2024-06-21 16:22:01,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 334 transitions, 4127 flow [2024-06-21 16:22:03,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 334 transitions, 4012 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-21 16:22:03,330 INFO L231 Difference]: Finished difference. Result has 286 places, 313 transitions, 3356 flow [2024-06-21 16:22:03,332 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} [2024-06-21 16:22:03,332 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 242 predicate places. [2024-06-21 16:22:03,332 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 313 transitions, 3356 flow [2024-06-21 16:22:03,333 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) [2024-06-21 16:22:03,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:03,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:03,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 16:22:03,333 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:22:03,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:03,333 INFO L85 PathProgramCache]: Analyzing trace with hash -529712008, now seen corresponding path program 1 times [2024-06-21 16:22:03,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:03,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784241123] [2024-06-21 16:22:03,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:03,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:03,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:04,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:04,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:04,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784241123] [2024-06-21 16:22:04,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784241123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:04,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:04,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:22:04,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204155180] [2024-06-21 16:22:04,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:04,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:22:04,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:04,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:22:04,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:22:04,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:22:04,272 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) [2024-06-21 16:22:04,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:04,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:22:04,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:05,532 INFO L124 PetriNetUnfolderBase]: 3674/6059 cut-off events. [2024-06-21 16:22:05,532 INFO L125 PetriNetUnfolderBase]: For 1091876/1091878 co-relation queries the response was YES. [2024-06-21 16:22:05,584 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. [2024-06-21 16:22:05,609 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 307 selfloop transitions, 17 changer transitions 0/334 dead transitions. [2024-06-21 16:22:05,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 334 transitions, 4128 flow [2024-06-21 16:22:05,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:22:05,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:22:05,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 16:22:05,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-21 16:22:05,612 INFO L175 Difference]: Start difference. First operand has 286 places, 313 transitions, 3356 flow. Second operand 8 states and 149 transitions. [2024-06-21 16:22:05,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 334 transitions, 4128 flow [2024-06-21 16:22:07,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 334 transitions, 4040 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-21 16:22:07,257 INFO L231 Difference]: Finished difference. Result has 288 places, 316 transitions, 3388 flow [2024-06-21 16:22:07,258 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} [2024-06-21 16:22:07,258 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 244 predicate places. [2024-06-21 16:22:07,258 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 316 transitions, 3388 flow [2024-06-21 16:22:07,259 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) [2024-06-21 16:22:07,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:07,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:07,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 16:22:07,259 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:22:07,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:07,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1182294487, now seen corresponding path program 2 times [2024-06-21 16:22:07,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:07,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304848234] [2024-06-21 16:22:07,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:07,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:07,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:08,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:08,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:08,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304848234] [2024-06-21 16:22:08,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304848234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:08,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:08,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:22:08,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600803283] [2024-06-21 16:22:08,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:08,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:22:08,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:08,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:22:08,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:22:08,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:22:08,128 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) [2024-06-21 16:22:08,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:08,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:22:08,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:09,385 INFO L124 PetriNetUnfolderBase]: 3684/6075 cut-off events. [2024-06-21 16:22:09,385 INFO L125 PetriNetUnfolderBase]: For 1106947/1106949 co-relation queries the response was YES. [2024-06-21 16:22:09,437 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. [2024-06-21 16:22:09,461 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 306 selfloop transitions, 22 changer transitions 0/338 dead transitions. [2024-06-21 16:22:09,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 338 transitions, 4166 flow [2024-06-21 16:22:09,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:22:09,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:22:09,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 16:22:09,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 16:22:09,462 INFO L175 Difference]: Start difference. First operand has 288 places, 316 transitions, 3388 flow. Second operand 8 states and 152 transitions. [2024-06-21 16:22:09,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 338 transitions, 4166 flow [2024-06-21 16:22:11,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 338 transitions, 4070 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-21 16:22:11,123 INFO L231 Difference]: Finished difference. Result has 290 places, 319 transitions, 3420 flow [2024-06-21 16:22:11,123 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} [2024-06-21 16:22:11,123 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 246 predicate places. [2024-06-21 16:22:11,123 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 319 transitions, 3420 flow [2024-06-21 16:22:11,124 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) [2024-06-21 16:22:11,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:11,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:11,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 16:22:11,124 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:22:11,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:11,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1187858677, now seen corresponding path program 3 times [2024-06-21 16:22:11,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:11,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306759304] [2024-06-21 16:22:11,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:11,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:11,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:11,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:11,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:11,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306759304] [2024-06-21 16:22:11,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306759304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:11,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:11,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:22:11,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167461562] [2024-06-21 16:22:11,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:11,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:22:11,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:11,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:22:11,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:22:11,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:22:11,974 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) [2024-06-21 16:22:11,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:11,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:22:11,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:13,240 INFO L124 PetriNetUnfolderBase]: 3694/6091 cut-off events. [2024-06-21 16:22:13,241 INFO L125 PetriNetUnfolderBase]: For 1128297/1128299 co-relation queries the response was YES. [2024-06-21 16:22:13,295 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. [2024-06-21 16:22:13,320 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 299 selfloop transitions, 29 changer transitions 0/338 dead transitions. [2024-06-21 16:22:13,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 338 transitions, 4196 flow [2024-06-21 16:22:13,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:22:13,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:22:13,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 16:22:13,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-21 16:22:13,321 INFO L175 Difference]: Start difference. First operand has 290 places, 319 transitions, 3420 flow. Second operand 8 states and 151 transitions. [2024-06-21 16:22:13,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 338 transitions, 4196 flow [2024-06-21 16:22:15,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 338 transitions, 4090 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-21 16:22:15,119 INFO L231 Difference]: Finished difference. Result has 292 places, 322 transitions, 3462 flow [2024-06-21 16:22:15,119 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} [2024-06-21 16:22:15,119 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 248 predicate places. [2024-06-21 16:22:15,119 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 322 transitions, 3462 flow [2024-06-21 16:22:15,120 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) [2024-06-21 16:22:15,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:15,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:15,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 16:22:15,120 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:22:15,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:15,120 INFO L85 PathProgramCache]: Analyzing trace with hash -524147818, now seen corresponding path program 2 times [2024-06-21 16:22:15,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:15,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595568177] [2024-06-21 16:22:15,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:15,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:15,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:16,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:16,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:16,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595568177] [2024-06-21 16:22:16,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595568177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:16,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:16,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:22:16,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895018561] [2024-06-21 16:22:16,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:16,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:22:16,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:16,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:22:16,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:22:16,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:22:16,301 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) [2024-06-21 16:22:16,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:16,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:22:16,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:17,527 INFO L124 PetriNetUnfolderBase]: 3697/6096 cut-off events. [2024-06-21 16:22:17,527 INFO L125 PetriNetUnfolderBase]: For 1153132/1153139 co-relation queries the response was YES. [2024-06-21 16:22:17,585 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. [2024-06-21 16:22:17,613 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 307 selfloop transitions, 22 changer transitions 0/339 dead transitions. [2024-06-21 16:22:17,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 339 transitions, 4232 flow [2024-06-21 16:22:17,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:22:17,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:22:17,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 16:22:17,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-21 16:22:17,615 INFO L175 Difference]: Start difference. First operand has 292 places, 322 transitions, 3462 flow. Second operand 8 states and 147 transitions. [2024-06-21 16:22:17,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 339 transitions, 4232 flow [2024-06-21 16:22:19,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 339 transitions, 4106 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-21 16:22:19,303 INFO L231 Difference]: Finished difference. Result has 294 places, 325 transitions, 3470 flow [2024-06-21 16:22:19,304 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} [2024-06-21 16:22:19,325 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 250 predicate places. [2024-06-21 16:22:19,325 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 325 transitions, 3470 flow [2024-06-21 16:22:19,325 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) [2024-06-21 16:22:19,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:19,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:19,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 16:22:19,326 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:22:19,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:19,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1187866334, now seen corresponding path program 3 times [2024-06-21 16:22:19,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:19,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453994853] [2024-06-21 16:22:19,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:19,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:19,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:20,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:20,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:20,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453994853] [2024-06-21 16:22:20,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453994853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:20,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:20,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:22:20,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169463387] [2024-06-21 16:22:20,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:20,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:22:20,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:20,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:22:20,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:22:20,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:22:20,333 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) [2024-06-21 16:22:20,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:20,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:22:20,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:21,554 INFO L124 PetriNetUnfolderBase]: 3725/6135 cut-off events. [2024-06-21 16:22:21,554 INFO L125 PetriNetUnfolderBase]: For 1188330/1188337 co-relation queries the response was YES. [2024-06-21 16:22:21,614 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. [2024-06-21 16:22:21,641 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 307 selfloop transitions, 34 changer transitions 0/351 dead transitions. [2024-06-21 16:22:21,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 351 transitions, 4650 flow [2024-06-21 16:22:21,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:22:21,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:22:21,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 16:22:21,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-21 16:22:21,642 INFO L175 Difference]: Start difference. First operand has 294 places, 325 transitions, 3470 flow. Second operand 8 states and 151 transitions. [2024-06-21 16:22:21,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 351 transitions, 4650 flow [2024-06-21 16:22:23,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 351 transitions, 4538 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-21 16:22:23,808 INFO L231 Difference]: Finished difference. Result has 297 places, 334 transitions, 3693 flow [2024-06-21 16:22:23,808 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} [2024-06-21 16:22:23,808 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 253 predicate places. [2024-06-21 16:22:23,808 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 334 transitions, 3693 flow [2024-06-21 16:22:23,809 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) [2024-06-21 16:22:23,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:23,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:23,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 16:22:23,809 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:22:23,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:23,809 INFO L85 PathProgramCache]: Analyzing trace with hash -71435328, now seen corresponding path program 4 times [2024-06-21 16:22:23,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:23,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185004910] [2024-06-21 16:22:23,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:23,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:23,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:24,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:24,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:24,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185004910] [2024-06-21 16:22:24,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185004910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:24,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:24,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:22:24,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59503728] [2024-06-21 16:22:24,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:24,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:22:24,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:24,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:22:24,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:22:24,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:22:24,759 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) [2024-06-21 16:22:24,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:24,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:22:24,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:25,955 INFO L124 PetriNetUnfolderBase]: 3737/6155 cut-off events. [2024-06-21 16:22:25,955 INFO L125 PetriNetUnfolderBase]: For 1209511/1209516 co-relation queries the response was YES. [2024-06-21 16:22:26,020 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. [2024-06-21 16:22:26,047 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 288 selfloop transitions, 57 changer transitions 0/355 dead transitions. [2024-06-21 16:22:26,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 355 transitions, 4841 flow [2024-06-21 16:22:26,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:22:26,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:22:26,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 16:22:26,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 16:22:26,049 INFO L175 Difference]: Start difference. First operand has 297 places, 334 transitions, 3693 flow. Second operand 8 states and 152 transitions. [2024-06-21 16:22:26,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 355 transitions, 4841 flow [2024-06-21 16:22:28,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 355 transitions, 4733 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-21 16:22:28,055 INFO L231 Difference]: Finished difference. Result has 301 places, 340 transitions, 3899 flow [2024-06-21 16:22:28,056 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} [2024-06-21 16:22:28,056 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 257 predicate places. [2024-06-21 16:22:28,056 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 340 transitions, 3899 flow [2024-06-21 16:22:28,056 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) [2024-06-21 16:22:28,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:28,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:28,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 16:22:28,057 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:22:28,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:28,057 INFO L85 PathProgramCache]: Analyzing trace with hash -80639755, now seen corresponding path program 4 times [2024-06-21 16:22:28,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:28,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019603986] [2024-06-21 16:22:28,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:28,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:28,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:28,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:28,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:28,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019603986] [2024-06-21 16:22:28,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019603986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:28,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:28,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:22:28,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580454945] [2024-06-21 16:22:28,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:28,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:22:28,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:28,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:22:28,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:22:28,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:22:28,919 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) [2024-06-21 16:22:28,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:28,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:22:28,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:30,108 INFO L124 PetriNetUnfolderBase]: 3739/6160 cut-off events. [2024-06-21 16:22:30,108 INFO L125 PetriNetUnfolderBase]: For 1222070/1222075 co-relation queries the response was YES. [2024-06-21 16:22:30,173 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. [2024-06-21 16:22:30,200 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 308 selfloop transitions, 38 changer transitions 0/356 dead transitions. [2024-06-21 16:22:30,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 356 transitions, 4715 flow [2024-06-21 16:22:30,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:22:30,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:22:30,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 16:22:30,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-21 16:22:30,221 INFO L175 Difference]: Start difference. First operand has 301 places, 340 transitions, 3899 flow. Second operand 8 states and 150 transitions. [2024-06-21 16:22:30,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 356 transitions, 4715 flow [2024-06-21 16:22:31,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 356 transitions, 4583 flow, removed 49 selfloop flow, removed 4 redundant places. [2024-06-21 16:22:31,908 INFO L231 Difference]: Finished difference. Result has 305 places, 343 transitions, 3945 flow [2024-06-21 16:22:31,908 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} [2024-06-21 16:22:31,908 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 261 predicate places. [2024-06-21 16:22:31,908 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 343 transitions, 3945 flow [2024-06-21 16:22:31,908 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) [2024-06-21 16:22:31,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:31,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:31,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 16:22:31,909 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)] === [2024-06-21 16:22:31,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:31,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1120286452, now seen corresponding path program 5 times [2024-06-21 16:22:31,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:31,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175876218] [2024-06-21 16:22:31,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:31,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:31,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:32,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:32,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:32,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175876218] [2024-06-21 16:22:32,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175876218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:32,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:32,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:22:32,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926137464] [2024-06-21 16:22:32,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:32,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:22:32,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:32,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:22:32,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:22:33,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:22:33,004 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) [2024-06-21 16:22:33,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:33,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:22:33,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:34,188 INFO L124 PetriNetUnfolderBase]: 3747/6172 cut-off events. [2024-06-21 16:22:34,189 INFO L125 PetriNetUnfolderBase]: For 1247326/1247331 co-relation queries the response was YES. [2024-06-21 16:22:34,249 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. [2024-06-21 16:22:34,276 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 319 selfloop transitions, 29 changer transitions 0/358 dead transitions. [2024-06-21 16:22:34,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 358 transitions, 4769 flow [2024-06-21 16:22:34,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:22:34,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:22:34,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 16:22:34,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-21 16:22:34,278 INFO L175 Difference]: Start difference. First operand has 305 places, 343 transitions, 3945 flow. Second operand 8 states and 147 transitions. [2024-06-21 16:22:34,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 358 transitions, 4769 flow [2024-06-21 16:22:36,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 358 transitions, 4615 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-21 16:22:36,099 INFO L231 Difference]: Finished difference. Result has 307 places, 346 transitions, 3953 flow [2024-06-21 16:22:36,099 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} [2024-06-21 16:22:36,099 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 263 predicate places. [2024-06-21 16:22:36,099 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 346 transitions, 3953 flow [2024-06-21 16:22:36,100 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) [2024-06-21 16:22:36,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:36,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:36,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 16:22:36,100 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)] === [2024-06-21 16:22:36,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:36,100 INFO L85 PathProgramCache]: Analyzing trace with hash -80632098, now seen corresponding path program 6 times [2024-06-21 16:22:36,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:36,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202113197] [2024-06-21 16:22:36,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:36,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:36,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:37,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:37,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:37,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202113197] [2024-06-21 16:22:37,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202113197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:37,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:37,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:22:37,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496227351] [2024-06-21 16:22:37,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:37,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:22:37,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:37,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:22:37,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:22:37,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:22:37,117 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) [2024-06-21 16:22:37,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:37,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:22:37,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:38,393 INFO L124 PetriNetUnfolderBase]: 3742/6165 cut-off events. [2024-06-21 16:22:38,393 INFO L125 PetriNetUnfolderBase]: For 1250254/1250259 co-relation queries the response was YES. [2024-06-21 16:22:38,455 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. [2024-06-21 16:22:38,480 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 314 selfloop transitions, 36 changer transitions 0/360 dead transitions. [2024-06-21 16:22:38,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 360 transitions, 4919 flow [2024-06-21 16:22:38,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:22:38,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:22:38,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 16:22:38,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-21 16:22:38,482 INFO L175 Difference]: Start difference. First operand has 307 places, 346 transitions, 3953 flow. Second operand 8 states and 151 transitions. [2024-06-21 16:22:38,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 360 transitions, 4919 flow [2024-06-21 16:22:40,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 360 transitions, 4791 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-21 16:22:40,361 INFO L231 Difference]: Finished difference. Result has 309 places, 346 transitions, 3904 flow [2024-06-21 16:22:40,361 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} [2024-06-21 16:22:40,361 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 265 predicate places. [2024-06-21 16:22:40,361 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 346 transitions, 3904 flow [2024-06-21 16:22:40,361 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) [2024-06-21 16:22:40,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:40,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:40,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 16:22:40,362 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)] === [2024-06-21 16:22:40,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:40,363 INFO L85 PathProgramCache]: Analyzing trace with hash -71096715, now seen corresponding path program 1 times [2024-06-21 16:22:40,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:40,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864810933] [2024-06-21 16:22:40,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:40,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:40,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:41,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:41,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:41,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864810933] [2024-06-21 16:22:41,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864810933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:41,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:41,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:22:41,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932205621] [2024-06-21 16:22:41,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:41,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:22:41,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:41,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:22:41,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:22:41,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 16:22:41,930 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) [2024-06-21 16:22:41,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:41,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 16:22:41,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:43,151 INFO L124 PetriNetUnfolderBase]: 3516/5876 cut-off events. [2024-06-21 16:22:43,151 INFO L125 PetriNetUnfolderBase]: For 1263507/1263529 co-relation queries the response was YES. [2024-06-21 16:22:43,205 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. [2024-06-21 16:22:43,228 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 276 selfloop transitions, 18 changer transitions 0/360 dead transitions. [2024-06-21 16:22:43,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 360 transitions, 4592 flow [2024-06-21 16:22:43,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:22:43,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:22:43,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 16:22:43,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-21 16:22:43,229 INFO L175 Difference]: Start difference. First operand has 309 places, 346 transitions, 3904 flow. Second operand 8 states and 150 transitions. [2024-06-21 16:22:43,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 360 transitions, 4592 flow [2024-06-21 16:22:45,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 360 transitions, 4372 flow, removed 43 selfloop flow, removed 8 redundant places. [2024-06-21 16:22:45,369 INFO L231 Difference]: Finished difference. Result has 309 places, 348 transitions, 3801 flow [2024-06-21 16:22:45,369 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} [2024-06-21 16:22:45,369 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 265 predicate places. [2024-06-21 16:22:45,369 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 348 transitions, 3801 flow [2024-06-21 16:22:45,369 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) [2024-06-21 16:22:45,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:45,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:45,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 16:22:45,370 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)] === [2024-06-21 16:22:45,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:45,370 INFO L85 PathProgramCache]: Analyzing trace with hash 38513199, now seen corresponding path program 1 times [2024-06-21 16:22:45,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:45,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130156855] [2024-06-21 16:22:45,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:45,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:45,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:46,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:46,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:46,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130156855] [2024-06-21 16:22:46,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130156855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:46,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:46,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:22:46,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901699938] [2024-06-21 16:22:46,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:46,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:22:46,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:46,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:22:46,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:22:46,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:22:46,179 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) [2024-06-21 16:22:46,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:46,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:22:46,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:47,555 INFO L124 PetriNetUnfolderBase]: 3710/6079 cut-off events. [2024-06-21 16:22:47,555 INFO L125 PetriNetUnfolderBase]: For 1274129/1274129 co-relation queries the response was YES. [2024-06-21 16:22:47,610 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. [2024-06-21 16:22:47,635 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 327 selfloop transitions, 15 changer transitions 0/378 dead transitions. [2024-06-21 16:22:47,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 378 transitions, 4617 flow [2024-06-21 16:22:47,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:22:47,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:22:47,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-21 16:22:47,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-21 16:22:47,636 INFO L175 Difference]: Start difference. First operand has 309 places, 348 transitions, 3801 flow. Second operand 8 states and 157 transitions. [2024-06-21 16:22:47,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 378 transitions, 4617 flow [2024-06-21 16:22:50,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 378 transitions, 4496 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-21 16:22:50,372 INFO L231 Difference]: Finished difference. Result has 310 places, 350 transitions, 3781 flow [2024-06-21 16:22:50,372 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} [2024-06-21 16:22:50,372 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 266 predicate places. [2024-06-21 16:22:50,372 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 350 transitions, 3781 flow [2024-06-21 16:22:50,373 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) [2024-06-21 16:22:50,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:50,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:50,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 16:22:50,373 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:22:50,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:50,373 INFO L85 PathProgramCache]: Analyzing trace with hash 48988719, now seen corresponding path program 2 times [2024-06-21 16:22:50,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:50,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050643741] [2024-06-21 16:22:50,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:50,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:50,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:51,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:51,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:51,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050643741] [2024-06-21 16:22:51,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050643741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:51,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:51,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:22:51,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439080080] [2024-06-21 16:22:51,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:51,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:22:51,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:51,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:22:51,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:22:51,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:22:51,189 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) [2024-06-21 16:22:51,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:51,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:22:51,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:52,596 INFO L124 PetriNetUnfolderBase]: 3723/6102 cut-off events. [2024-06-21 16:22:52,596 INFO L125 PetriNetUnfolderBase]: For 1294064/1294064 co-relation queries the response was YES. [2024-06-21 16:22:52,654 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. [2024-06-21 16:22:52,680 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 327 selfloop transitions, 16 changer transitions 0/379 dead transitions. [2024-06-21 16:22:52,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 379 transitions, 4615 flow [2024-06-21 16:22:52,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:22:52,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:22:52,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 16:22:52,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-21 16:22:52,681 INFO L175 Difference]: Start difference. First operand has 310 places, 350 transitions, 3781 flow. Second operand 8 states and 154 transitions. [2024-06-21 16:22:52,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 379 transitions, 4615 flow [2024-06-21 16:22:54,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 379 transitions, 4530 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-21 16:22:54,984 INFO L231 Difference]: Finished difference. Result has 313 places, 355 transitions, 3835 flow [2024-06-21 16:22:54,984 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} [2024-06-21 16:22:54,984 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 269 predicate places. [2024-06-21 16:22:54,984 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 355 transitions, 3835 flow [2024-06-21 16:22:54,985 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) [2024-06-21 16:22:54,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:54,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:54,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 16:22:54,985 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:22:54,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:54,985 INFO L85 PathProgramCache]: Analyzing trace with hash 381192345, now seen corresponding path program 1 times [2024-06-21 16:22:54,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:54,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263357549] [2024-06-21 16:22:54,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:54,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:54,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:55,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:55,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:55,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263357549] [2024-06-21 16:22:55,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263357549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:55,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:55,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:22:55,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856259375] [2024-06-21 16:22:55,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:55,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:22:55,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:55,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:22:55,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:22:55,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:22:55,797 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) [2024-06-21 16:22:55,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:55,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:22:55,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:57,134 INFO L124 PetriNetUnfolderBase]: 3728/6109 cut-off events. [2024-06-21 16:22:57,134 INFO L125 PetriNetUnfolderBase]: For 1311240/1311240 co-relation queries the response was YES. [2024-06-21 16:22:57,194 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. [2024-06-21 16:22:57,219 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 331 selfloop transitions, 17 changer transitions 0/384 dead transitions. [2024-06-21 16:22:57,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 384 transitions, 4695 flow [2024-06-21 16:22:57,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:22:57,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:22:57,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-21 16:22:57,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-21 16:22:57,221 INFO L175 Difference]: Start difference. First operand has 313 places, 355 transitions, 3835 flow. Second operand 8 states and 157 transitions. [2024-06-21 16:22:57,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 384 transitions, 4695 flow [2024-06-21 16:22:59,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 384 transitions, 4604 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-21 16:22:59,567 INFO L231 Difference]: Finished difference. Result has 316 places, 358 transitions, 3888 flow [2024-06-21 16:22:59,567 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} [2024-06-21 16:22:59,567 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 272 predicate places. [2024-06-21 16:22:59,568 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 358 transitions, 3888 flow [2024-06-21 16:22:59,568 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) [2024-06-21 16:22:59,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:59,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:59,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 16:22:59,568 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:22:59,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:59,569 INFO L85 PathProgramCache]: Analyzing trace with hash 139544319, now seen corresponding path program 2 times [2024-06-21 16:22:59,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:59,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20200150] [2024-06-21 16:22:59,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:59,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:59,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:00,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:00,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:00,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20200150] [2024-06-21 16:23:00,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20200150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:00,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:00,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:23:00,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025376796] [2024-06-21 16:23:00,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:00,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:23:00,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:00,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:23:00,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:23:00,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:23:00,367 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) [2024-06-21 16:23:00,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:00,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:23:00,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:01,700 INFO L124 PetriNetUnfolderBase]: 3733/6116 cut-off events. [2024-06-21 16:23:01,700 INFO L125 PetriNetUnfolderBase]: For 1334554/1334554 co-relation queries the response was YES. [2024-06-21 16:23:01,767 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. [2024-06-21 16:23:01,793 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 329 selfloop transitions, 23 changer transitions 0/388 dead transitions. [2024-06-21 16:23:01,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 388 transitions, 4764 flow [2024-06-21 16:23:01,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:23:01,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:23:01,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 16:23:01,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-21 16:23:01,794 INFO L175 Difference]: Start difference. First operand has 316 places, 358 transitions, 3888 flow. Second operand 9 states and 173 transitions. [2024-06-21 16:23:01,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 388 transitions, 4764 flow [2024-06-21 16:23:04,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 388 transitions, 4642 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-21 16:23:04,106 INFO L231 Difference]: Finished difference. Result has 319 places, 361 transitions, 3928 flow [2024-06-21 16:23:04,106 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} [2024-06-21 16:23:04,107 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 275 predicate places. [2024-06-21 16:23:04,107 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 361 transitions, 3928 flow [2024-06-21 16:23:04,107 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) [2024-06-21 16:23:04,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:04,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:04,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 16:23:04,107 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:23:04,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:04,108 INFO L85 PathProgramCache]: Analyzing trace with hash 393074769, now seen corresponding path program 3 times [2024-06-21 16:23:04,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:04,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649614022] [2024-06-21 16:23:04,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:04,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:04,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:04,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:04,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:04,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649614022] [2024-06-21 16:23:04,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649614022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:04,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:04,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:23:04,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269523746] [2024-06-21 16:23:04,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:04,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:23:04,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:04,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:23:04,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:23:04,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:23:04,983 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) [2024-06-21 16:23:04,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:04,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:23:04,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:06,224 INFO L124 PetriNetUnfolderBase]: 3741/6128 cut-off events. [2024-06-21 16:23:06,225 INFO L125 PetriNetUnfolderBase]: For 1367962/1367962 co-relation queries the response was YES. [2024-06-21 16:23:06,287 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. [2024-06-21 16:23:06,315 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 324 selfloop transitions, 21 changer transitions 0/381 dead transitions. [2024-06-21 16:23:06,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 381 transitions, 4736 flow [2024-06-21 16:23:06,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:23:06,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:23:06,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 16:23:06,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-21 16:23:06,316 INFO L175 Difference]: Start difference. First operand has 319 places, 361 transitions, 3928 flow. Second operand 8 states and 150 transitions. [2024-06-21 16:23:06,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 381 transitions, 4736 flow [2024-06-21 16:23:08,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 381 transitions, 4596 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-21 16:23:08,766 INFO L231 Difference]: Finished difference. Result has 320 places, 363 transitions, 3913 flow [2024-06-21 16:23:08,766 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} [2024-06-21 16:23:08,767 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 276 predicate places. [2024-06-21 16:23:08,767 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 363 transitions, 3913 flow [2024-06-21 16:23:08,767 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) [2024-06-21 16:23:08,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:08,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:08,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 16:23:08,767 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:23:08,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:08,768 INFO L85 PathProgramCache]: Analyzing trace with hash 156843051, now seen corresponding path program 1 times [2024-06-21 16:23:08,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:08,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613849993] [2024-06-21 16:23:08,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:08,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:08,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:09,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:09,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:09,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613849993] [2024-06-21 16:23:09,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613849993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:09,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:09,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:23:09,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417215307] [2024-06-21 16:23:09,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:09,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:23:09,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:09,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:23:09,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:23:09,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:23:09,475 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) [2024-06-21 16:23:09,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:09,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:23:09,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:10,855 INFO L124 PetriNetUnfolderBase]: 3949/6400 cut-off events. [2024-06-21 16:23:10,855 INFO L125 PetriNetUnfolderBase]: For 1385663/1385666 co-relation queries the response was YES. [2024-06-21 16:23:10,924 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. [2024-06-21 16:23:10,954 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 355 selfloop transitions, 29 changer transitions 0/389 dead transitions. [2024-06-21 16:23:10,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 389 transitions, 4841 flow [2024-06-21 16:23:10,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:23:10,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:23:10,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 16:23:10,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-21 16:23:10,955 INFO L175 Difference]: Start difference. First operand has 320 places, 363 transitions, 3913 flow. Second operand 8 states and 151 transitions. [2024-06-21 16:23:10,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 389 transitions, 4841 flow [2024-06-21 16:23:13,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 389 transitions, 4704 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-21 16:23:13,366 INFO L231 Difference]: Finished difference. Result has 321 places, 366 transitions, 3948 flow [2024-06-21 16:23:13,367 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} [2024-06-21 16:23:13,367 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 277 predicate places. [2024-06-21 16:23:13,367 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 366 transitions, 3948 flow [2024-06-21 16:23:13,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:13,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:13,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:13,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 16:23:13,368 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:23:13,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:13,368 INFO L85 PathProgramCache]: Analyzing trace with hash 156664305, now seen corresponding path program 3 times [2024-06-21 16:23:13,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:13,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521745961] [2024-06-21 16:23:13,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:13,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:13,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:14,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:14,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:14,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521745961] [2024-06-21 16:23:14,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521745961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:14,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:14,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:23:14,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300489958] [2024-06-21 16:23:14,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:14,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:23:14,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:14,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:23:14,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:23:14,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:23:14,116 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) [2024-06-21 16:23:14,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:14,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:23:14,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:15,485 INFO L124 PetriNetUnfolderBase]: 3751/6145 cut-off events. [2024-06-21 16:23:15,486 INFO L125 PetriNetUnfolderBase]: For 1405063/1405066 co-relation queries the response was YES. [2024-06-21 16:23:15,555 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. [2024-06-21 16:23:15,584 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 326 selfloop transitions, 29 changer transitions 0/392 dead transitions. [2024-06-21 16:23:15,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 392 transitions, 4830 flow [2024-06-21 16:23:15,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:23:15,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:23:15,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-21 16:23:15,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-21 16:23:15,612 INFO L175 Difference]: Start difference. First operand has 321 places, 366 transitions, 3948 flow. Second operand 8 states and 158 transitions. [2024-06-21 16:23:15,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 392 transitions, 4830 flow [2024-06-21 16:23:17,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 392 transitions, 4680 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-21 16:23:17,671 INFO L231 Difference]: Finished difference. Result has 323 places, 369 transitions, 3982 flow [2024-06-21 16:23:17,672 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} [2024-06-21 16:23:17,672 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 279 predicate places. [2024-06-21 16:23:17,672 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 369 transitions, 3982 flow [2024-06-21 16:23:17,672 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) [2024-06-21 16:23:17,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:17,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:17,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 16:23:17,673 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:23:17,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:17,673 INFO L85 PathProgramCache]: Analyzing trace with hash 157022355, now seen corresponding path program 4 times [2024-06-21 16:23:17,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:17,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449146302] [2024-06-21 16:23:17,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:17,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:17,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:18,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:18,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:18,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449146302] [2024-06-21 16:23:18,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449146302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:18,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:18,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:23:18,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072144127] [2024-06-21 16:23:18,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:18,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:23:18,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:18,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:23:18,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:23:18,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:23:18,431 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) [2024-06-21 16:23:18,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:18,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:23:18,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:19,754 INFO L124 PetriNetUnfolderBase]: 3756/6152 cut-off events. [2024-06-21 16:23:19,754 INFO L125 PetriNetUnfolderBase]: For 1432882/1432885 co-relation queries the response was YES. [2024-06-21 16:23:19,821 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. [2024-06-21 16:23:19,848 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 318 selfloop transitions, 37 changer transitions 0/392 dead transitions. [2024-06-21 16:23:19,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 392 transitions, 4862 flow [2024-06-21 16:23:19,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:23:19,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:23:19,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 16:23:19,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-21 16:23:19,850 INFO L175 Difference]: Start difference. First operand has 323 places, 369 transitions, 3982 flow. Second operand 8 states and 156 transitions. [2024-06-21 16:23:19,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 392 transitions, 4862 flow [2024-06-21 16:23:22,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 392 transitions, 4700 flow, removed 54 selfloop flow, removed 6 redundant places. [2024-06-21 16:23:22,246 INFO L231 Difference]: Finished difference. Result has 325 places, 372 transitions, 4026 flow [2024-06-21 16:23:22,246 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} [2024-06-21 16:23:22,247 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 281 predicate places. [2024-06-21 16:23:22,247 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 372 transitions, 4026 flow [2024-06-21 16:23:22,247 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) [2024-06-21 16:23:22,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:22,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:22,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 16:23:22,248 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:23:22,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:22,248 INFO L85 PathProgramCache]: Analyzing trace with hash 144162203, now seen corresponding path program 1 times [2024-06-21 16:23:22,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:22,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278563663] [2024-06-21 16:23:22,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:22,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:22,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:23,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:23,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:23,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278563663] [2024-06-21 16:23:23,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278563663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:23,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:23,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:23:23,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95532107] [2024-06-21 16:23:23,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:23,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:23:23,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:23,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:23:23,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:23:23,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:23:23,120 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) [2024-06-21 16:23:23,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:23,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:23:23,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:24,631 INFO L124 PetriNetUnfolderBase]: 3761/6159 cut-off events. [2024-06-21 16:23:24,631 INFO L125 PetriNetUnfolderBase]: For 1458270/1458273 co-relation queries the response was YES. [2024-06-21 16:23:24,683 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. [2024-06-21 16:23:24,707 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 336 selfloop transitions, 22 changer transitions 0/395 dead transitions. [2024-06-21 16:23:24,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 395 transitions, 4862 flow [2024-06-21 16:23:24,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:23:24,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:23:24,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 16:23:24,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-21 16:23:24,709 INFO L175 Difference]: Start difference. First operand has 325 places, 372 transitions, 4026 flow. Second operand 8 states and 153 transitions. [2024-06-21 16:23:24,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 395 transitions, 4862 flow [2024-06-21 16:23:26,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 395 transitions, 4678 flow, removed 57 selfloop flow, removed 6 redundant places. [2024-06-21 16:23:26,881 INFO L231 Difference]: Finished difference. Result has 327 places, 375 transitions, 3968 flow [2024-06-21 16:23:26,881 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} [2024-06-21 16:23:26,881 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 283 predicate places. [2024-06-21 16:23:26,881 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 375 transitions, 3968 flow [2024-06-21 16:23:26,882 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) [2024-06-21 16:23:26,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:26,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:26,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 16:23:26,882 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:23:26,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:26,882 INFO L85 PathProgramCache]: Analyzing trace with hash 157022541, now seen corresponding path program 2 times [2024-06-21 16:23:26,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:26,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559625000] [2024-06-21 16:23:26,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:26,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:26,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:27,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:27,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:27,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559625000] [2024-06-21 16:23:27,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559625000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:27,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:27,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:23:27,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112136186] [2024-06-21 16:23:27,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:27,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:23:27,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:27,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:23:27,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:23:27,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:23:27,735 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) [2024-06-21 16:23:27,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:27,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:23:27,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:29,181 INFO L124 PetriNetUnfolderBase]: 3969/6430 cut-off events. [2024-06-21 16:23:29,181 INFO L125 PetriNetUnfolderBase]: For 1482924/1482927 co-relation queries the response was YES. [2024-06-21 16:23:29,239 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. [2024-06-21 16:23:29,265 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 359 selfloop transitions, 34 changer transitions 0/398 dead transitions. [2024-06-21 16:23:29,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 398 transitions, 4918 flow [2024-06-21 16:23:29,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:23:29,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:23:29,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 16:23:29,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-21 16:23:29,266 INFO L175 Difference]: Start difference. First operand has 327 places, 375 transitions, 3968 flow. Second operand 8 states and 150 transitions. [2024-06-21 16:23:29,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 398 transitions, 4918 flow [2024-06-21 16:23:31,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 398 transitions, 4814 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-21 16:23:31,198 INFO L231 Difference]: Finished difference. Result has 329 places, 378 transitions, 4058 flow [2024-06-21 16:23:31,198 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} [2024-06-21 16:23:31,198 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 285 predicate places. [2024-06-21 16:23:31,198 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 378 transitions, 4058 flow [2024-06-21 16:23:31,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:31,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:31,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:31,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 16:23:31,199 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:23:31,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:31,199 INFO L85 PathProgramCache]: Analyzing trace with hash -932322565, now seen corresponding path program 2 times [2024-06-21 16:23:31,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:31,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700592922] [2024-06-21 16:23:31,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:31,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:31,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:32,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:32,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:32,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700592922] [2024-06-21 16:23:32,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700592922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:32,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:32,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:23:32,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307989043] [2024-06-21 16:23:32,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:32,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:23:32,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:32,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:23:32,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:23:32,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:23:32,294 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) [2024-06-21 16:23:32,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:32,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:23:32,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:33,686 INFO L124 PetriNetUnfolderBase]: 3779/6184 cut-off events. [2024-06-21 16:23:33,686 INFO L125 PetriNetUnfolderBase]: For 1511633/1511636 co-relation queries the response was YES. [2024-06-21 16:23:33,752 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. [2024-06-21 16:23:33,780 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 329 selfloop transitions, 37 changer transitions 0/404 dead transitions. [2024-06-21 16:23:33,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 404 transitions, 5245 flow [2024-06-21 16:23:33,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:23:33,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:23:33,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 16:23:33,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-21 16:23:33,782 INFO L175 Difference]: Start difference. First operand has 329 places, 378 transitions, 4058 flow. Second operand 8 states and 153 transitions. [2024-06-21 16:23:33,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 404 transitions, 5245 flow [2024-06-21 16:23:36,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 404 transitions, 5073 flow, removed 54 selfloop flow, removed 6 redundant places. [2024-06-21 16:23:36,203 INFO L231 Difference]: Finished difference. Result has 332 places, 386 transitions, 4157 flow [2024-06-21 16:23:36,203 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} [2024-06-21 16:23:36,203 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 288 predicate places. [2024-06-21 16:23:36,204 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 386 transitions, 4157 flow [2024-06-21 16:23:36,204 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) [2024-06-21 16:23:36,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:36,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:36,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 16:23:36,204 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:23:36,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:36,205 INFO L85 PathProgramCache]: Analyzing trace with hash -433281943, now seen corresponding path program 5 times [2024-06-21 16:23:36,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:36,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088778613] [2024-06-21 16:23:36,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:36,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:36,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:37,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:37,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:37,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088778613] [2024-06-21 16:23:37,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088778613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:37,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:37,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:23:37,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517737248] [2024-06-21 16:23:37,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:37,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:23:37,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:37,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:23:37,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:23:37,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:23:37,160 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) [2024-06-21 16:23:37,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:37,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:23:37,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:38,612 INFO L124 PetriNetUnfolderBase]: 3784/6192 cut-off events. [2024-06-21 16:23:38,612 INFO L125 PetriNetUnfolderBase]: For 1538087/1538087 co-relation queries the response was YES. [2024-06-21 16:23:38,676 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. [2024-06-21 16:23:38,704 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 346 selfloop transitions, 22 changer transitions 0/406 dead transitions. [2024-06-21 16:23:38,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 406 transitions, 5067 flow [2024-06-21 16:23:38,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:23:38,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:23:38,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 16:23:38,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-21 16:23:38,706 INFO L175 Difference]: Start difference. First operand has 332 places, 386 transitions, 4157 flow. Second operand 8 states and 150 transitions. [2024-06-21 16:23:38,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 406 transitions, 5067 flow [2024-06-21 16:23:41,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 406 transitions, 4943 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-06-21 16:23:41,340 INFO L231 Difference]: Finished difference. Result has 336 places, 389 transitions, 4221 flow [2024-06-21 16:23:41,340 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} [2024-06-21 16:23:41,340 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 292 predicate places. [2024-06-21 16:23:41,340 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 389 transitions, 4221 flow [2024-06-21 16:23:41,340 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) [2024-06-21 16:23:41,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:41,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:41,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 16:23:41,341 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:23:41,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:41,341 INFO L85 PathProgramCache]: Analyzing trace with hash -932619483, now seen corresponding path program 3 times [2024-06-21 16:23:41,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:41,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304184078] [2024-06-21 16:23:41,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:41,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:41,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:42,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:42,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:42,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304184078] [2024-06-21 16:23:42,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304184078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:42,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:42,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:23:42,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585904426] [2024-06-21 16:23:42,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:42,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:23:42,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:42,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:23:42,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:23:42,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:23:42,177 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) [2024-06-21 16:23:42,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:42,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:23:42,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:43,588 INFO L124 PetriNetUnfolderBase]: 4000/6475 cut-off events. [2024-06-21 16:23:43,589 INFO L125 PetriNetUnfolderBase]: For 1577564/1577567 co-relation queries the response was YES. [2024-06-21 16:23:43,658 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. [2024-06-21 16:23:43,688 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 362 selfloop transitions, 46 changer transitions 0/413 dead transitions. [2024-06-21 16:23:43,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 413 transitions, 5575 flow [2024-06-21 16:23:43,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:23:43,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:23:43,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 16:23:43,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-21 16:23:43,689 INFO L175 Difference]: Start difference. First operand has 336 places, 389 transitions, 4221 flow. Second operand 8 states and 148 transitions. [2024-06-21 16:23:43,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 413 transitions, 5575 flow [2024-06-21 16:23:46,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 413 transitions, 5409 flow, removed 63 selfloop flow, removed 6 redundant places. [2024-06-21 16:23:46,475 INFO L231 Difference]: Finished difference. Result has 338 places, 395 transitions, 4407 flow [2024-06-21 16:23:46,475 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} [2024-06-21 16:23:46,475 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 294 predicate places. [2024-06-21 16:23:46,476 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 395 transitions, 4407 flow [2024-06-21 16:23:46,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:46,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:46,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:46,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 16:23:46,476 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:23:46,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:46,477 INFO L85 PathProgramCache]: Analyzing trace with hash 393198149, now seen corresponding path program 3 times [2024-06-21 16:23:46,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:46,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755351243] [2024-06-21 16:23:46,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:46,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:46,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:47,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:47,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:47,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755351243] [2024-06-21 16:23:47,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755351243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:47,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:47,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:23:47,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905768446] [2024-06-21 16:23:47,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:47,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:23:47,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:47,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:23:47,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:23:47,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:23:47,541 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) [2024-06-21 16:23:47,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:47,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:23:47,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:48,888 INFO L124 PetriNetUnfolderBase]: 3802/6220 cut-off events. [2024-06-21 16:23:48,888 INFO L125 PetriNetUnfolderBase]: For 1600644/1600647 co-relation queries the response was YES. [2024-06-21 16:23:48,957 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. [2024-06-21 16:23:48,987 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 345 selfloop transitions, 30 changer transitions 0/415 dead transitions. [2024-06-21 16:23:48,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 415 transitions, 5266 flow [2024-06-21 16:23:48,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:23:48,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:23:48,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 16:23:48,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-21 16:23:48,988 INFO L175 Difference]: Start difference. First operand has 338 places, 395 transitions, 4407 flow. Second operand 8 states and 151 transitions. [2024-06-21 16:23:48,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 415 transitions, 5266 flow [2024-06-21 16:23:51,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 415 transitions, 5098 flow, removed 68 selfloop flow, removed 4 redundant places. [2024-06-21 16:23:51,445 INFO L231 Difference]: Finished difference. Result has 342 places, 398 transitions, 4378 flow [2024-06-21 16:23:51,446 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} [2024-06-21 16:23:51,446 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 298 predicate places. [2024-06-21 16:23:51,446 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 398 transitions, 4378 flow [2024-06-21 16:23:51,446 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) [2024-06-21 16:23:51,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:51,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:51,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 16:23:51,447 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:23:51,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:51,448 INFO L85 PathProgramCache]: Analyzing trace with hash 393197715, now seen corresponding path program 6 times [2024-06-21 16:23:51,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:51,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444413922] [2024-06-21 16:23:51,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:51,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:51,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:52,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:52,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:52,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444413922] [2024-06-21 16:23:52,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444413922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:52,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:52,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:23:52,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530427575] [2024-06-21 16:23:52,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:52,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:23:52,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:52,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:23:52,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:23:52,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:23:52,359 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) [2024-06-21 16:23:52,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:52,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:23:52,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:53,902 INFO L124 PetriNetUnfolderBase]: 3815/6240 cut-off events. [2024-06-21 16:23:53,903 INFO L125 PetriNetUnfolderBase]: For 1634034/1634037 co-relation queries the response was YES. [2024-06-21 16:23:53,968 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. [2024-06-21 16:23:54,000 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 323 selfloop transitions, 59 changer transitions 0/422 dead transitions. [2024-06-21 16:23:54,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 422 transitions, 5716 flow [2024-06-21 16:23:54,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:23:54,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:23:54,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 16:23:54,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-21 16:23:54,001 INFO L175 Difference]: Start difference. First operand has 342 places, 398 transitions, 4378 flow. Second operand 8 states and 155 transitions. [2024-06-21 16:23:54,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 422 transitions, 5716 flow [2024-06-21 16:23:56,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 422 transitions, 5608 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 16:23:56,795 INFO L231 Difference]: Finished difference. Result has 344 places, 404 transitions, 4680 flow [2024-06-21 16:23:56,795 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} [2024-06-21 16:23:56,795 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 300 predicate places. [2024-06-21 16:23:56,796 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 404 transitions, 4680 flow [2024-06-21 16:23:56,796 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) [2024-06-21 16:23:56,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:56,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:56,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 16:23:56,796 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)] === [2024-06-21 16:23:56,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:56,797 INFO L85 PathProgramCache]: Analyzing trace with hash -4980492, now seen corresponding path program 1 times [2024-06-21 16:23:56,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:56,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275001435] [2024-06-21 16:23:56,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:56,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:56,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:57,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:57,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:57,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275001435] [2024-06-21 16:23:57,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275001435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:57,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:57,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:23:57,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647445748] [2024-06-21 16:23:57,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:57,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:23:57,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:57,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:23:57,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:23:58,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:23:58,029 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) [2024-06-21 16:23:58,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:58,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:23:58,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:59,907 INFO L124 PetriNetUnfolderBase]: 4223/6889 cut-off events. [2024-06-21 16:23:59,907 INFO L125 PetriNetUnfolderBase]: For 1738380/1738383 co-relation queries the response was YES. [2024-06-21 16:23:59,977 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. [2024-06-21 16:24:00,008 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 350 selfloop transitions, 109 changer transitions 0/464 dead transitions. [2024-06-21 16:24:00,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 464 transitions, 6056 flow [2024-06-21 16:24:00,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:24:00,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:24:00,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 219 transitions. [2024-06-21 16:24:00,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630021141649049 [2024-06-21 16:24:00,010 INFO L175 Difference]: Start difference. First operand has 344 places, 404 transitions, 4680 flow. Second operand 11 states and 219 transitions. [2024-06-21 16:24:00,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 464 transitions, 6056 flow [2024-06-21 16:24:03,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 464 transitions, 5870 flow, removed 74 selfloop flow, removed 4 redundant places. [2024-06-21 16:24:03,523 INFO L231 Difference]: Finished difference. Result has 353 places, 418 transitions, 5004 flow [2024-06-21 16:24:03,523 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} [2024-06-21 16:24:03,523 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 309 predicate places. [2024-06-21 16:24:03,523 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 418 transitions, 5004 flow [2024-06-21 16:24:03,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:03,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:03,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:24:03,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 16:24:03,524 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:24:03,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:03,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1617635529, now seen corresponding path program 4 times [2024-06-21 16:24:03,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:03,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884303282] [2024-06-21 16:24:03,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:03,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:03,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:04,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:24:04,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:04,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884303282] [2024-06-21 16:24:04,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884303282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:04,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:04,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:24:04,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147021793] [2024-06-21 16:24:04,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:04,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:24:04,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:04,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:24:04,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:24:04,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:24:04,438 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) [2024-06-21 16:24:04,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:04,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:24:04,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:05,928 INFO L124 PetriNetUnfolderBase]: 4015/6616 cut-off events. [2024-06-21 16:24:05,929 INFO L125 PetriNetUnfolderBase]: For 1698697/1698697 co-relation queries the response was YES. [2024-06-21 16:24:06,001 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. [2024-06-21 16:24:06,032 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 364 selfloop transitions, 28 changer transitions 0/432 dead transitions. [2024-06-21 16:24:06,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 432 transitions, 5908 flow [2024-06-21 16:24:06,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:24:06,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:24:06,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 16:24:06,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-21 16:24:06,033 INFO L175 Difference]: Start difference. First operand has 353 places, 418 transitions, 5004 flow. Second operand 8 states and 146 transitions. [2024-06-21 16:24:06,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 432 transitions, 5908 flow [2024-06-21 16:24:08,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 432 transitions, 5668 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-21 16:24:08,979 INFO L231 Difference]: Finished difference. Result has 355 places, 420 transitions, 4921 flow [2024-06-21 16:24:08,979 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} [2024-06-21 16:24:08,980 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 311 predicate places. [2024-06-21 16:24:08,980 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 420 transitions, 4921 flow [2024-06-21 16:24:08,980 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) [2024-06-21 16:24:08,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:08,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:24:08,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 16:24:08,980 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:24:08,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:08,981 INFO L85 PathProgramCache]: Analyzing trace with hash 262561271, now seen corresponding path program 4 times [2024-06-21 16:24:08,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:08,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514233296] [2024-06-21 16:24:08,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:08,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:08,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:09,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:24:09,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:09,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514233296] [2024-06-21 16:24:09,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514233296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:09,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:09,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:24:09,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841494147] [2024-06-21 16:24:09,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:09,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:24:09,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:09,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:24:09,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:24:09,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:24:09,744 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) [2024-06-21 16:24:09,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:09,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:24:09,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:11,354 INFO L124 PetriNetUnfolderBase]: 4223/6889 cut-off events. [2024-06-21 16:24:11,354 INFO L125 PetriNetUnfolderBase]: For 1709531/1709536 co-relation queries the response was YES. [2024-06-21 16:24:11,429 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. [2024-06-21 16:24:11,460 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 408 selfloop transitions, 30 changer transitions 0/443 dead transitions. [2024-06-21 16:24:11,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 443 transitions, 5959 flow [2024-06-21 16:24:11,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:24:11,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:24:11,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 16:24:11,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-21 16:24:11,461 INFO L175 Difference]: Start difference. First operand has 355 places, 420 transitions, 4921 flow. Second operand 8 states and 147 transitions. [2024-06-21 16:24:11,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 443 transitions, 5959 flow [2024-06-21 16:24:15,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 443 transitions, 5754 flow, removed 47 selfloop flow, removed 8 redundant places. [2024-06-21 16:24:15,247 INFO L231 Difference]: Finished difference. Result has 355 places, 423 transitions, 4900 flow [2024-06-21 16:24:15,247 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} [2024-06-21 16:24:15,248 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 311 predicate places. [2024-06-21 16:24:15,248 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 423 transitions, 4900 flow [2024-06-21 16:24:15,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:15,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:15,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:24:15,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 16:24:15,248 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:24:15,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:15,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1845147467, now seen corresponding path program 5 times [2024-06-21 16:24:15,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:15,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460857982] [2024-06-21 16:24:15,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:15,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:15,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:15,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:24:15,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:15,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460857982] [2024-06-21 16:24:15,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460857982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:15,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:15,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:24:15,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287000568] [2024-06-21 16:24:15,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:15,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:24:15,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:15,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:24:15,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:24:15,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:24:15,934 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) [2024-06-21 16:24:15,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:15,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:24:15,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:17,582 INFO L124 PetriNetUnfolderBase]: 4228/6896 cut-off events. [2024-06-21 16:24:17,582 INFO L125 PetriNetUnfolderBase]: For 1733305/1733310 co-relation queries the response was YES. [2024-06-21 16:24:17,657 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. [2024-06-21 16:24:17,688 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 412 selfloop transitions, 29 changer transitions 0/446 dead transitions. [2024-06-21 16:24:17,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 446 transitions, 5950 flow [2024-06-21 16:24:17,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:24:17,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:24:17,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 16:24:17,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-21 16:24:17,690 INFO L175 Difference]: Start difference. First operand has 355 places, 423 transitions, 4900 flow. Second operand 8 states and 148 transitions. [2024-06-21 16:24:17,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 446 transitions, 5950 flow [2024-06-21 16:24:22,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 446 transitions, 5794 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-21 16:24:22,036 INFO L231 Difference]: Finished difference. Result has 357 places, 426 transitions, 4932 flow [2024-06-21 16:24:22,036 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} [2024-06-21 16:24:22,037 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 313 predicate places. [2024-06-21 16:24:22,037 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 426 transitions, 4932 flow [2024-06-21 16:24:22,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:22,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:22,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:24:22,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 16:24:22,037 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)] === [2024-06-21 16:24:22,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:22,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1389703273, now seen corresponding path program 7 times [2024-06-21 16:24:22,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:22,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154028389] [2024-06-21 16:24:22,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:22,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:22,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:22,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:24:22,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:22,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154028389] [2024-06-21 16:24:22,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154028389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:22,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:22,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:24:22,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551060444] [2024-06-21 16:24:22,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:22,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:24:22,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:22,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:24:22,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:24:22,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:24:22,863 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) [2024-06-21 16:24:22,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:22,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:24:22,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:24,399 INFO L124 PetriNetUnfolderBase]: 4030/6639 cut-off events. [2024-06-21 16:24:24,399 INFO L125 PetriNetUnfolderBase]: For 1754699/1754699 co-relation queries the response was YES. [2024-06-21 16:24:24,475 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. [2024-06-21 16:24:24,507 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 378 selfloop transitions, 29 changer transitions 0/449 dead transitions. [2024-06-21 16:24:24,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 449 transitions, 5928 flow [2024-06-21 16:24:24,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:24:24,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:24:24,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 16:24:24,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-21 16:24:24,509 INFO L175 Difference]: Start difference. First operand has 357 places, 426 transitions, 4932 flow. Second operand 8 states and 155 transitions. [2024-06-21 16:24:24,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 449 transitions, 5928 flow [2024-06-21 16:24:28,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 449 transitions, 5768 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-21 16:24:28,828 INFO L231 Difference]: Finished difference. Result has 359 places, 429 transitions, 4974 flow [2024-06-21 16:24:28,828 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} [2024-06-21 16:24:28,829 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 315 predicate places. [2024-06-21 16:24:28,829 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 429 transitions, 4974 flow [2024-06-21 16:24:28,829 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) [2024-06-21 16:24:28,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:28,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:24:28,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 16:24:28,829 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:24:28,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:28,830 INFO L85 PathProgramCache]: Analyzing trace with hash 2050329029, now seen corresponding path program 6 times [2024-06-21 16:24:28,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:28,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615255373] [2024-06-21 16:24:28,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:28,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:28,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:29,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:24:29,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:29,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615255373] [2024-06-21 16:24:29,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615255373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:29,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:29,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:24:29,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889719573] [2024-06-21 16:24:29,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:29,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:24:29,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:29,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:24:29,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:24:29,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:24:29,550 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) [2024-06-21 16:24:29,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:29,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:24:29,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:31,114 INFO L124 PetriNetUnfolderBase]: 4230/6901 cut-off events. [2024-06-21 16:24:31,114 INFO L125 PetriNetUnfolderBase]: For 1774340/1774345 co-relation queries the response was YES. [2024-06-21 16:24:31,191 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. [2024-06-21 16:24:31,223 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 404 selfloop transitions, 37 changer transitions 0/446 dead transitions. [2024-06-21 16:24:31,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 446 transitions, 5898 flow [2024-06-21 16:24:31,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:24:31,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:24:31,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 16:24:31,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-21 16:24:31,224 INFO L175 Difference]: Start difference. First operand has 359 places, 429 transitions, 4974 flow. Second operand 8 states and 146 transitions. [2024-06-21 16:24:31,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 446 transitions, 5898 flow [2024-06-21 16:24:34,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 446 transitions, 5648 flow, removed 98 selfloop flow, removed 6 redundant places. [2024-06-21 16:24:34,837 INFO L231 Difference]: Finished difference. Result has 361 places, 429 transitions, 4804 flow [2024-06-21 16:24:34,837 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} [2024-06-21 16:24:34,852 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 317 predicate places. [2024-06-21 16:24:34,852 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 429 transitions, 4804 flow [2024-06-21 16:24:34,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:34,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:34,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:24:34,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 16:24:34,853 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:24:34,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:34,853 INFO L85 PathProgramCache]: Analyzing trace with hash 963050391, now seen corresponding path program 8 times [2024-06-21 16:24:34,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:34,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376664507] [2024-06-21 16:24:34,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:34,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:34,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:35,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:24:35,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:35,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376664507] [2024-06-21 16:24:35,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376664507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:35,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:35,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:24:35,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820313453] [2024-06-21 16:24:35,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:35,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:24:35,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:35,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:24:35,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:24:35,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:24:35,632 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) [2024-06-21 16:24:35,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:35,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:24:35,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:37,163 INFO L124 PetriNetUnfolderBase]: 4024/6631 cut-off events. [2024-06-21 16:24:37,164 INFO L125 PetriNetUnfolderBase]: For 1784550/1784550 co-relation queries the response was YES. [2024-06-21 16:24:37,242 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. [2024-06-21 16:24:37,276 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 370 selfloop transitions, 34 changer transitions 0/446 dead transitions. [2024-06-21 16:24:37,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 446 transitions, 5654 flow [2024-06-21 16:24:37,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:24:37,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:24:37,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 16:24:37,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-21 16:24:37,277 INFO L175 Difference]: Start difference. First operand has 361 places, 429 transitions, 4804 flow. Second operand 8 states and 154 transitions. [2024-06-21 16:24:37,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 446 transitions, 5654 flow [2024-06-21 16:24:40,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 446 transitions, 5438 flow, removed 59 selfloop flow, removed 7 redundant places. [2024-06-21 16:24:40,690 INFO L231 Difference]: Finished difference. Result has 362 places, 429 transitions, 4662 flow [2024-06-21 16:24:40,691 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} [2024-06-21 16:24:40,691 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 318 predicate places. [2024-06-21 16:24:40,691 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 429 transitions, 4662 flow [2024-06-21 16:24:40,691 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) [2024-06-21 16:24:40,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:40,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:24:40,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 16:24:40,692 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:24:40,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:40,692 INFO L85 PathProgramCache]: Analyzing trace with hash -2003584127, now seen corresponding path program 7 times [2024-06-21 16:24:40,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:40,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113873776] [2024-06-21 16:24:40,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:40,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:40,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:41,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:24:41,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:41,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113873776] [2024-06-21 16:24:41,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113873776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:41,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:41,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:24:41,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451693305] [2024-06-21 16:24:41,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:41,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:24:41,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:41,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:24:41,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:24:41,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:24:41,485 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) [2024-06-21 16:24:41,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:41,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:24:41,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:42,995 INFO L124 PetriNetUnfolderBase]: 4232/6904 cut-off events. [2024-06-21 16:24:42,995 INFO L125 PetriNetUnfolderBase]: For 1813732/1813737 co-relation queries the response was YES. [2024-06-21 16:24:43,074 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. [2024-06-21 16:24:43,106 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 403 selfloop transitions, 41 changer transitions 0/449 dead transitions. [2024-06-21 16:24:43,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 449 transitions, 5726 flow [2024-06-21 16:24:43,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:24:43,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:24:43,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 16:24:43,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-21 16:24:43,107 INFO L175 Difference]: Start difference. First operand has 362 places, 429 transitions, 4662 flow. Second operand 8 states and 145 transitions. [2024-06-21 16:24:43,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 449 transitions, 5726 flow [2024-06-21 16:24:47,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 449 transitions, 5584 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-21 16:24:47,527 INFO L231 Difference]: Finished difference. Result has 363 places, 432 transitions, 4748 flow [2024-06-21 16:24:47,527 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} [2024-06-21 16:24:47,527 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 319 predicate places. [2024-06-21 16:24:47,527 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 432 transitions, 4748 flow [2024-06-21 16:24:47,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:47,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:47,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:24:47,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 16:24:47,528 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:24:47,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:47,528 INFO L85 PathProgramCache]: Analyzing trace with hash 255216379, now seen corresponding path program 4 times [2024-06-21 16:24:47,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:47,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901981036] [2024-06-21 16:24:47,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:47,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:47,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:48,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:24:48,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:48,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901981036] [2024-06-21 16:24:48,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901981036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:48,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:48,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:24:48,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218675810] [2024-06-21 16:24:48,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:48,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:24:48,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:48,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:24:48,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:24:48,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:24:48,494 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) [2024-06-21 16:24:48,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:48,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:24:48,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:50,209 INFO L124 PetriNetUnfolderBase]: 4026/6637 cut-off events. [2024-06-21 16:24:50,209 INFO L125 PetriNetUnfolderBase]: For 1827078/1827083 co-relation queries the response was YES. [2024-06-21 16:24:50,273 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. [2024-06-21 16:24:50,299 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 385 selfloop transitions, 22 changer transitions 0/450 dead transitions. [2024-06-21 16:24:50,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 450 transitions, 5629 flow [2024-06-21 16:24:50,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:24:50,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:24:50,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 16:24:50,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-21 16:24:50,301 INFO L175 Difference]: Start difference. First operand has 363 places, 432 transitions, 4748 flow. Second operand 8 states and 150 transitions. [2024-06-21 16:24:50,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 450 transitions, 5629 flow [2024-06-21 16:24:53,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 450 transitions, 5365 flow, removed 93 selfloop flow, removed 6 redundant places. [2024-06-21 16:24:53,888 INFO L231 Difference]: Finished difference. Result has 365 places, 433 transitions, 4561 flow [2024-06-21 16:24:53,888 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} [2024-06-21 16:24:53,889 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 321 predicate places. [2024-06-21 16:24:53,889 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 433 transitions, 4561 flow [2024-06-21 16:24:53,889 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) [2024-06-21 16:24:53,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:53,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:24:53,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 16:24:53,889 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:24:53,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:53,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1830855909, now seen corresponding path program 5 times [2024-06-21 16:24:53,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:53,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506601753] [2024-06-21 16:24:53,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:53,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:53,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:54,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:24:54,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:54,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506601753] [2024-06-21 16:24:54,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506601753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:54,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:54,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:24:54,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192392699] [2024-06-21 16:24:54,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:54,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:24:54,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:54,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:24:54,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:24:54,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:24:54,836 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) [2024-06-21 16:24:54,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:54,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:24:54,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:56,390 INFO L124 PetriNetUnfolderBase]: 4037/6653 cut-off events. [2024-06-21 16:24:56,390 INFO L125 PetriNetUnfolderBase]: For 1861296/1861301 co-relation queries the response was YES. [2024-06-21 16:24:56,460 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. [2024-06-21 16:24:56,487 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 373 selfloop transitions, 40 changer transitions 0/456 dead transitions. [2024-06-21 16:24:56,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 456 transitions, 5894 flow [2024-06-21 16:24:56,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:24:56,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:24:56,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 16:24:56,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-21 16:24:56,489 INFO L175 Difference]: Start difference. First operand has 365 places, 433 transitions, 4561 flow. Second operand 8 states and 150 transitions. [2024-06-21 16:24:56,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 456 transitions, 5894 flow [2024-06-21 16:25:00,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 456 transitions, 5838 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 16:25:00,138 INFO L231 Difference]: Finished difference. Result has 368 places, 441 transitions, 4817 flow [2024-06-21 16:25:00,139 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} [2024-06-21 16:25:00,139 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 324 predicate places. [2024-06-21 16:25:00,139 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 441 transitions, 4817 flow [2024-06-21 16:25:00,139 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) [2024-06-21 16:25:00,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:25:00,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:25:00,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 16:25:00,140 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:25:00,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:25:00,140 INFO L85 PathProgramCache]: Analyzing trace with hash 931035203, now seen corresponding path program 9 times [2024-06-21 16:25:00,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:25:00,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198963465] [2024-06-21 16:25:00,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:25:00,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:25:00,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:25:00,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:25:00,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:25:00,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198963465] [2024-06-21 16:25:00,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198963465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:25:00,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:25:00,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:25:00,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301617023] [2024-06-21 16:25:00,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:25:00,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:25:00,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:25:00,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:25:00,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:25:01,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:25:01,009 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) [2024-06-21 16:25:01,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:25:01,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:25:01,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:25:02,587 INFO L124 PetriNetUnfolderBase]: 4044/6659 cut-off events. [2024-06-21 16:25:02,587 INFO L125 PetriNetUnfolderBase]: For 1892311/1892311 co-relation queries the response was YES. [2024-06-21 16:25:02,658 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. [2024-06-21 16:25:02,687 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 363 selfloop transitions, 52 changer transitions 0/458 dead transitions. [2024-06-21 16:25:02,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 458 transitions, 5833 flow [2024-06-21 16:25:02,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:25:02,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:25:02,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 16:25:02,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-21 16:25:02,688 INFO L175 Difference]: Start difference. First operand has 368 places, 441 transitions, 4817 flow. Second operand 8 states and 151 transitions. [2024-06-21 16:25:02,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 458 transitions, 5833 flow [2024-06-21 16:25:06,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 458 transitions, 5691 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-06-21 16:25:06,872 INFO L231 Difference]: Finished difference. Result has 372 places, 444 transitions, 4943 flow [2024-06-21 16:25:06,872 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} [2024-06-21 16:25:06,872 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 328 predicate places. [2024-06-21 16:25:06,872 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 444 transitions, 4943 flow [2024-06-21 16:25:06,872 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) [2024-06-21 16:25:06,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:25:06,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:25:06,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 16:25:06,873 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:25:06,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:25:06,873 INFO L85 PathProgramCache]: Analyzing trace with hash 931272539, now seen corresponding path program 8 times [2024-06-21 16:25:06,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:25:06,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300075915] [2024-06-21 16:25:06,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:25:06,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:25:06,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:25:07,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:25:07,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:25:07,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300075915] [2024-06-21 16:25:07,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300075915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:25:07,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:25:07,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:25:07,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859460306] [2024-06-21 16:25:07,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:25:07,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:25:07,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:25:07,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:25:07,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:25:07,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:25:07,700 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) [2024-06-21 16:25:07,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:25:07,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:25:07,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:25:09,272 INFO L124 PetriNetUnfolderBase]: 4260/6943 cut-off events. [2024-06-21 16:25:09,272 INFO L125 PetriNetUnfolderBase]: For 1938259/1938264 co-relation queries the response was YES. [2024-06-21 16:25:09,350 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. [2024-06-21 16:25:09,382 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 397 selfloop transitions, 63 changer transitions 0/465 dead transitions. [2024-06-21 16:25:09,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 465 transitions, 6461 flow [2024-06-21 16:25:09,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:25:09,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:25:09,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 16:25:09,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-21 16:25:09,383 INFO L175 Difference]: Start difference. First operand has 372 places, 444 transitions, 4943 flow. Second operand 8 states and 145 transitions. [2024-06-21 16:25:09,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 465 transitions, 6461 flow [2024-06-21 16:25:13,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 465 transitions, 6215 flow, removed 73 selfloop flow, removed 6 redundant places. [2024-06-21 16:25:13,929 INFO L231 Difference]: Finished difference. Result has 374 places, 450 transitions, 5123 flow [2024-06-21 16:25:13,929 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} [2024-06-21 16:25:13,933 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 330 predicate places. [2024-06-21 16:25:13,933 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 450 transitions, 5123 flow [2024-06-21 16:25:13,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:25:13,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:25:13,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:25:13,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-21 16:25:13,934 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:25:13,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:25:13,934 INFO L85 PathProgramCache]: Analyzing trace with hash 931035389, now seen corresponding path program 9 times [2024-06-21 16:25:13,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:25:13,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826256873] [2024-06-21 16:25:13,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:25:13,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:25:13,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:25:14,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:25:14,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:25:14,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826256873] [2024-06-21 16:25:14,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826256873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:25:14,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:25:14,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:25:14,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169663419] [2024-06-21 16:25:14,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:25:14,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:25:14,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:25:14,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:25:14,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:25:14,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:25:14,811 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) [2024-06-21 16:25:14,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:25:14,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:25:14,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:25:16,453 INFO L124 PetriNetUnfolderBase]: 4257/6939 cut-off events. [2024-06-21 16:25:16,454 INFO L125 PetriNetUnfolderBase]: For 1958244/1958249 co-relation queries the response was YES. [2024-06-21 16:25:16,541 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. [2024-06-21 16:25:16,576 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 397 selfloop transitions, 62 changer transitions 0/464 dead transitions. [2024-06-21 16:25:16,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 464 transitions, 6075 flow [2024-06-21 16:25:16,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:25:16,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:25:16,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 16:25:16,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-21 16:25:16,577 INFO L175 Difference]: Start difference. First operand has 374 places, 450 transitions, 5123 flow. Second operand 8 states and 144 transitions. [2024-06-21 16:25:16,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 464 transitions, 6075 flow [2024-06-21 16:25:20,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 464 transitions, 5759 flow, removed 129 selfloop flow, removed 4 redundant places. [2024-06-21 16:25:20,713 INFO L231 Difference]: Finished difference. Result has 378 places, 450 transitions, 4937 flow [2024-06-21 16:25:20,714 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} [2024-06-21 16:25:20,714 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 334 predicate places. [2024-06-21 16:25:20,714 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 450 transitions, 4937 flow [2024-06-21 16:25:20,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:25:20,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:25:20,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:25:20,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-21 16:25:20,715 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:25:20,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:25:20,715 INFO L85 PathProgramCache]: Analyzing trace with hash 976860395, now seen corresponding path program 6 times [2024-06-21 16:25:20,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:25:20,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748137780] [2024-06-21 16:25:20,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:25:20,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:25:20,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:25:21,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:25:21,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:25:21,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748137780] [2024-06-21 16:25:21,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748137780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:25:21,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:25:21,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:25:21,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654071528] [2024-06-21 16:25:21,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:25:21,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:25:21,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:25:21,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:25:21,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:25:21,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:25:21,701 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) [2024-06-21 16:25:21,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:25:21,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:25:21,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:25:23,246 INFO L124 PetriNetUnfolderBase]: 4051/6672 cut-off events. [2024-06-21 16:25:23,247 INFO L125 PetriNetUnfolderBase]: For 1967087/1967092 co-relation queries the response was YES. [2024-06-21 16:25:23,328 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. [2024-06-21 16:25:23,360 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 390 selfloop transitions, 30 changer transitions 0/465 dead transitions. [2024-06-21 16:25:23,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 465 transitions, 5822 flow [2024-06-21 16:25:23,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:25:23,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:25:23,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 16:25:23,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-21 16:25:23,362 INFO L175 Difference]: Start difference. First operand has 378 places, 450 transitions, 4937 flow. Second operand 8 states and 148 transitions. [2024-06-21 16:25:23,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 465 transitions, 5822 flow [2024-06-21 16:25:27,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 465 transitions, 5620 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-21 16:25:27,715 INFO L231 Difference]: Finished difference. Result has 379 places, 451 transitions, 4814 flow [2024-06-21 16:25:27,715 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} [2024-06-21 16:25:27,715 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 335 predicate places. [2024-06-21 16:25:27,715 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 451 transitions, 4814 flow [2024-06-21 16:25:27,715 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) [2024-06-21 16:25:27,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:25:27,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:25:27,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-21 16:25:27,716 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)] === [2024-06-21 16:25:27,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:25:27,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1531473572, now seen corresponding path program 2 times [2024-06-21 16:25:27,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:25:27,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737125110] [2024-06-21 16:25:27,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:25:27,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:25:27,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:25:28,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:25:28,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:25:28,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737125110] [2024-06-21 16:25:28,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737125110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:25:28,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:25:28,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:25:28,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944984291] [2024-06-21 16:25:28,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:25:28,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:25:28,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:25:28,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:25:28,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:25:28,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:25:28,830 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) [2024-06-21 16:25:28,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:25:28,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:25:28,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:25:30,960 INFO L124 PetriNetUnfolderBase]: 4418/7256 cut-off events. [2024-06-21 16:25:30,960 INFO L125 PetriNetUnfolderBase]: For 2074887/2074887 co-relation queries the response was YES. [2024-06-21 16:25:31,037 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. [2024-06-21 16:25:31,071 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 388 selfloop transitions, 112 changer transitions 0/505 dead transitions. [2024-06-21 16:25:31,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 505 transitions, 6234 flow [2024-06-21 16:25:31,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:25:31,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:25:31,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 217 transitions. [2024-06-21 16:25:31,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4587737843551797 [2024-06-21 16:25:31,072 INFO L175 Difference]: Start difference. First operand has 379 places, 451 transitions, 4814 flow. Second operand 11 states and 217 transitions. [2024-06-21 16:25:31,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 505 transitions, 6234 flow [2024-06-21 16:25:35,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 505 transitions, 6162 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 16:25:35,586 INFO L231 Difference]: Finished difference. Result has 386 places, 462 transitions, 5214 flow [2024-06-21 16:25:35,587 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} [2024-06-21 16:25:35,587 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 342 predicate places. [2024-06-21 16:25:35,587 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 462 transitions, 5214 flow [2024-06-21 16:25:35,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:25:35,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:25:35,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:25:35,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-21 16:25:35,588 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)] === [2024-06-21 16:25:35,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:25:35,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1903841792, now seen corresponding path program 3 times [2024-06-21 16:25:35,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:25:35,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529042965] [2024-06-21 16:25:35,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:25:35,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:25:35,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:25:36,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:25:36,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:25:36,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529042965] [2024-06-21 16:25:36,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529042965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:25:36,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:25:36,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:25:36,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191142720] [2024-06-21 16:25:36,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:25:36,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:25:36,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:25:36,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:25:36,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:25:36,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:25:36,828 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) [2024-06-21 16:25:36,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:25:36,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:25:36,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:25:38,972 INFO L124 PetriNetUnfolderBase]: 4541/7499 cut-off events. [2024-06-21 16:25:38,972 INFO L125 PetriNetUnfolderBase]: For 2121081/2121081 co-relation queries the response was YES. [2024-06-21 16:25:39,061 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. [2024-06-21 16:25:39,095 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 391 selfloop transitions, 117 changer transitions 0/513 dead transitions. [2024-06-21 16:25:39,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 513 transitions, 6626 flow [2024-06-21 16:25:39,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:25:39,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:25:39,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 216 transitions. [2024-06-21 16:25:39,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45665961945031713 [2024-06-21 16:25:39,097 INFO L175 Difference]: Start difference. First operand has 386 places, 462 transitions, 5214 flow. Second operand 11 states and 216 transitions. [2024-06-21 16:25:39,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 513 transitions, 6626 flow [2024-06-21 16:25:43,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 513 transitions, 6359 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-21 16:25:43,329 INFO L231 Difference]: Finished difference. Result has 393 places, 470 transitions, 5395 flow [2024-06-21 16:25:43,329 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} [2024-06-21 16:25:43,329 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 349 predicate places. [2024-06-21 16:25:43,329 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 470 transitions, 5395 flow [2024-06-21 16:25:43,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:25:43,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:25:43,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:25:43,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-21 16:25:43,330 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)] === [2024-06-21 16:25:43,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:25:43,330 INFO L85 PathProgramCache]: Analyzing trace with hash -219987554, now seen corresponding path program 4 times [2024-06-21 16:25:43,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:25:43,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212497818] [2024-06-21 16:25:43,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:25:43,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:25:43,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:25:44,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:25:44,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:25:44,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212497818] [2024-06-21 16:25:44,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212497818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:25:44,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:25:44,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:25:44,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512933066] [2024-06-21 16:25:44,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:25:44,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:25:44,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:25:44,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:25:44,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:25:44,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:25:44,495 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) [2024-06-21 16:25:44,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:25:44,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:25:44,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:25:46,602 INFO L124 PetriNetUnfolderBase]: 4651/7709 cut-off events. [2024-06-21 16:25:46,602 INFO L125 PetriNetUnfolderBase]: For 2159119/2159119 co-relation queries the response was YES. [2024-06-21 16:25:46,702 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. [2024-06-21 16:25:46,740 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 387 selfloop transitions, 126 changer transitions 0/518 dead transitions. [2024-06-21 16:25:46,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 518 transitions, 6781 flow [2024-06-21 16:25:46,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:25:46,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:25:46,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 215 transitions. [2024-06-21 16:25:46,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 16:25:46,742 INFO L175 Difference]: Start difference. First operand has 393 places, 470 transitions, 5395 flow. Second operand 11 states and 215 transitions. [2024-06-21 16:25:46,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 518 transitions, 6781 flow [2024-06-21 16:25:51,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 518 transitions, 6493 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-21 16:25:51,057 INFO L231 Difference]: Finished difference. Result has 400 places, 476 transitions, 5541 flow [2024-06-21 16:25:51,058 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} [2024-06-21 16:25:51,058 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 356 predicate places. [2024-06-21 16:25:51,058 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 476 transitions, 5541 flow [2024-06-21 16:25:51,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:25:51,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:25:51,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:25:51,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-21 16:25:51,059 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:25:51,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:25:51,060 INFO L85 PathProgramCache]: Analyzing trace with hash 28173824, now seen corresponding path program 5 times [2024-06-21 16:25:51,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:25:51,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350893333] [2024-06-21 16:25:51,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:25:51,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:25:51,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:25:52,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:25:52,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:25:52,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350893333] [2024-06-21 16:25:52,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350893333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:25:52,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:25:52,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:25:52,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549481808] [2024-06-21 16:25:52,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:25:52,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:25:52,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:25:52,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:25:52,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:25:52,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:25:52,306 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) [2024-06-21 16:25:52,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:25:52,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:25:52,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:25:54,679 INFO L124 PetriNetUnfolderBase]: 4733/7861 cut-off events. [2024-06-21 16:25:54,679 INFO L125 PetriNetUnfolderBase]: For 2194906/2194906 co-relation queries the response was YES. [2024-06-21 16:25:54,770 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. [2024-06-21 16:25:54,804 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 383 selfloop transitions, 134 changer transitions 0/522 dead transitions. [2024-06-21 16:25:54,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 522 transitions, 6921 flow [2024-06-21 16:25:54,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:25:54,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:25:54,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-21 16:25:54,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.452431289640592 [2024-06-21 16:25:54,806 INFO L175 Difference]: Start difference. First operand has 400 places, 476 transitions, 5541 flow. Second operand 11 states and 214 transitions. [2024-06-21 16:25:54,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 522 transitions, 6921 flow [2024-06-21 16:25:59,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 522 transitions, 6610 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-21 16:25:59,686 INFO L231 Difference]: Finished difference. Result has 406 places, 480 transitions, 5654 flow [2024-06-21 16:25:59,687 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} [2024-06-21 16:25:59,687 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 362 predicate places. [2024-06-21 16:25:59,687 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 480 transitions, 5654 flow [2024-06-21 16:25:59,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:25:59,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:25:59,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:25:59,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-21 16:25:59,688 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:25:59,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:25:59,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1889147278, now seen corresponding path program 6 times [2024-06-21 16:25:59,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:25:59,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395715367] [2024-06-21 16:25:59,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:25:59,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:25:59,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:26:00,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:26:00,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:26:00,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395715367] [2024-06-21 16:26:00,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395715367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:26:00,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:26:00,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:26:00,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897851807] [2024-06-21 16:26:00,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:26:00,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:26:00,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:26:00,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:26:00,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:26:01,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:26:01,011 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) [2024-06-21 16:26:01,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:26:01,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:26:01,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:26:03,141 INFO L124 PetriNetUnfolderBase]: 4713/7829 cut-off events. [2024-06-21 16:26:03,141 INFO L125 PetriNetUnfolderBase]: For 2147304/2147304 co-relation queries the response was YES. [2024-06-21 16:26:03,237 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. [2024-06-21 16:26:03,273 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 362 selfloop transitions, 155 changer transitions 0/522 dead transitions. [2024-06-21 16:26:03,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 522 transitions, 6734 flow [2024-06-21 16:26:03,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:26:03,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:26:03,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 213 transitions. [2024-06-21 16:26:03,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4503171247357294 [2024-06-21 16:26:03,274 INFO L175 Difference]: Start difference. First operand has 406 places, 480 transitions, 5654 flow. Second operand 11 states and 213 transitions. [2024-06-21 16:26:03,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 522 transitions, 6734 flow [2024-06-21 16:26:08,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 522 transitions, 6444 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-21 16:26:08,234 INFO L231 Difference]: Finished difference. Result has 410 places, 479 transitions, 5516 flow [2024-06-21 16:26:08,234 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} [2024-06-21 16:26:08,234 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 366 predicate places. [2024-06-21 16:26:08,234 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 479 transitions, 5516 flow [2024-06-21 16:26:08,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:26:08,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:26:08,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:26:08,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-21 16:26:08,235 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)] === [2024-06-21 16:26:08,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:26:08,236 INFO L85 PathProgramCache]: Analyzing trace with hash -89531653, now seen corresponding path program 7 times [2024-06-21 16:26:08,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:26:08,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111630882] [2024-06-21 16:26:08,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:26:08,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:26:08,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:26:09,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:26:09,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:26:09,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111630882] [2024-06-21 16:26:09,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111630882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:26:09,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:26:09,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:26:09,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961072948] [2024-06-21 16:26:09,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:26:09,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:26:09,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:26:09,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:26:09,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:26:09,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:26:09,269 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) [2024-06-21 16:26:09,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:26:09,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:26:09,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:26:11,065 INFO L124 PetriNetUnfolderBase]: 4523/7590 cut-off events. [2024-06-21 16:26:11,065 INFO L125 PetriNetUnfolderBase]: For 2094824/2094832 co-relation queries the response was YES. [2024-06-21 16:26:11,152 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. [2024-06-21 16:26:11,185 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 383 selfloop transitions, 81 changer transitions 0/509 dead transitions. [2024-06-21 16:26:11,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 509 transitions, 7422 flow [2024-06-21 16:26:11,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:26:11,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:26:11,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 16:26:11,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-21 16:26:11,186 INFO L175 Difference]: Start difference. First operand has 410 places, 479 transitions, 5516 flow. Second operand 8 states and 150 transitions. [2024-06-21 16:26:11,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 509 transitions, 7422 flow [2024-06-21 16:26:15,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 509 transitions, 6815 flow, removed 40 selfloop flow, removed 12 redundant places. [2024-06-21 16:26:15,961 INFO L231 Difference]: Finished difference. Result has 408 places, 495 transitions, 5512 flow [2024-06-21 16:26:15,962 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} [2024-06-21 16:26:15,962 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 364 predicate places. [2024-06-21 16:26:15,962 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 495 transitions, 5512 flow [2024-06-21 16:26:15,962 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) [2024-06-21 16:26:15,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:26:15,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:26:15,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-21 16:26:15,963 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)] === [2024-06-21 16:26:15,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:26:15,963 INFO L85 PathProgramCache]: Analyzing trace with hash 2080465529, now seen corresponding path program 8 times [2024-06-21 16:26:15,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:26:15,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503892685] [2024-06-21 16:26:15,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:26:15,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:26:15,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:26:16,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:26:16,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:26:16,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503892685] [2024-06-21 16:26:16,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503892685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:26:16,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:26:16,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:26:16,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775534223] [2024-06-21 16:26:16,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:26:16,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:26:16,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:26:16,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:26:16,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:26:17,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:26:17,085 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) [2024-06-21 16:26:17,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:26:17,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:26:17,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:26:18,903 INFO L124 PetriNetUnfolderBase]: 4532/7604 cut-off events. [2024-06-21 16:26:18,904 INFO L125 PetriNetUnfolderBase]: For 2123205/2123213 co-relation queries the response was YES. [2024-06-21 16:26:19,001 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. [2024-06-21 16:26:19,037 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 383 selfloop transitions, 87 changer transitions 0/515 dead transitions. [2024-06-21 16:26:19,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 515 transitions, 7294 flow [2024-06-21 16:26:19,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:26:19,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:26:19,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 16:26:19,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-21 16:26:19,039 INFO L175 Difference]: Start difference. First operand has 408 places, 495 transitions, 5512 flow. Second operand 8 states and 150 transitions. [2024-06-21 16:26:19,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 515 transitions, 7294 flow [2024-06-21 16:26:25,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 515 transitions, 6988 flow, removed 114 selfloop flow, removed 5 redundant places. [2024-06-21 16:26:25,156 INFO L231 Difference]: Finished difference. Result has 412 places, 502 transitions, 5660 flow [2024-06-21 16:26:25,156 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} [2024-06-21 16:26:25,156 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 368 predicate places. [2024-06-21 16:26:25,156 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 502 transitions, 5660 flow [2024-06-21 16:26:25,156 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) [2024-06-21 16:26:25,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:26:25,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:26:25,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-21 16:26:25,157 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)] === [2024-06-21 16:26:25,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:26:25,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1794889995, now seen corresponding path program 10 times [2024-06-21 16:26:25,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:26:25,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170413575] [2024-06-21 16:26:25,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:26:25,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:26:25,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:26:26,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:26:26,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:26:26,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170413575] [2024-06-21 16:26:26,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170413575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:26:26,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:26:26,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:26:26,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80330977] [2024-06-21 16:26:26,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:26:26,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:26:26,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:26:26,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:26:26,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:26:26,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:26:26,312 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) [2024-06-21 16:26:26,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:26:26,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:26:26,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:26:28,032 INFO L124 PetriNetUnfolderBase]: 4537/7611 cut-off events. [2024-06-21 16:26:28,032 INFO L125 PetriNetUnfolderBase]: For 2136533/2136536 co-relation queries the response was YES. [2024-06-21 16:26:28,127 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. [2024-06-21 16:26:28,162 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 388 selfloop transitions, 87 changer transitions 0/520 dead transitions. [2024-06-21 16:26:28,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 520 transitions, 7244 flow [2024-06-21 16:26:28,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:26:28,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:26:28,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 16:26:28,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-21 16:26:28,163 INFO L175 Difference]: Start difference. First operand has 412 places, 502 transitions, 5660 flow. Second operand 8 states and 150 transitions. [2024-06-21 16:26:28,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 520 transitions, 7244 flow [2024-06-21 16:26:33,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 520 transitions, 7061 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-21 16:26:33,374 INFO L231 Difference]: Finished difference. Result has 416 places, 508 transitions, 5975 flow [2024-06-21 16:26:33,374 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} [2024-06-21 16:26:33,374 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 372 predicate places. [2024-06-21 16:26:33,375 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 508 transitions, 5975 flow [2024-06-21 16:26:33,375 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) [2024-06-21 16:26:33,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:26:33,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:26:33,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-21 16:26:33,375 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)] === [2024-06-21 16:26:33,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:26:33,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1795127331, now seen corresponding path program 10 times [2024-06-21 16:26:33,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:26:33,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542824604] [2024-06-21 16:26:33,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:26:33,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:26:33,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:26:34,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:26:34,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:26:34,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542824604] [2024-06-21 16:26:34,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542824604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:26:34,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:26:34,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:26:34,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951227057] [2024-06-21 16:26:34,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:26:34,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:26:34,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:26:34,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:26:34,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:26:34,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:26:34,318 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) [2024-06-21 16:26:34,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:26:34,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:26:34,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:26:36,115 INFO L124 PetriNetUnfolderBase]: 4749/7890 cut-off events. [2024-06-21 16:26:36,116 INFO L125 PetriNetUnfolderBase]: For 2177684/2177692 co-relation queries the response was YES. [2024-06-21 16:26:36,219 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. [2024-06-21 16:26:36,256 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 434 selfloop transitions, 87 changer transitions 0/526 dead transitions. [2024-06-21 16:26:36,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 526 transitions, 7629 flow [2024-06-21 16:26:36,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:26:36,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:26:36,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 16:26:36,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-21 16:26:36,257 INFO L175 Difference]: Start difference. First operand has 416 places, 508 transitions, 5975 flow. Second operand 8 states and 143 transitions. [2024-06-21 16:26:36,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 526 transitions, 7629 flow [2024-06-21 16:26:42,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 526 transitions, 7377 flow, removed 88 selfloop flow, removed 4 redundant places. [2024-06-21 16:26:42,228 INFO L231 Difference]: Finished difference. Result has 420 places, 514 transitions, 6197 flow [2024-06-21 16:26:42,228 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} [2024-06-21 16:26:42,229 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 376 predicate places. [2024-06-21 16:26:42,229 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 514 transitions, 6197 flow [2024-06-21 16:26:42,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:26:42,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:26:42,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:26:42,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-21 16:26:42,229 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)] === [2024-06-21 16:26:42,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:26:42,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1977806273, now seen corresponding path program 9 times [2024-06-21 16:26:42,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:26:42,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431715124] [2024-06-21 16:26:42,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:26:42,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:26:42,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:26:43,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:26:43,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:26:43,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431715124] [2024-06-21 16:26:43,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431715124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:26:43,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:26:43,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:26:43,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831784118] [2024-06-21 16:26:43,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:26:43,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:26:43,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:26:43,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:26:43,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:26:43,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:26:43,273 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) [2024-06-21 16:26:43,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:26:43,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:26:43,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:26:45,265 INFO L124 PetriNetUnfolderBase]: 4541/7618 cut-off events. [2024-06-21 16:26:45,265 INFO L125 PetriNetUnfolderBase]: For 2183274/2183282 co-relation queries the response was YES. [2024-06-21 16:26:45,355 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. [2024-06-21 16:26:45,389 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 427 selfloop transitions, 54 changer transitions 0/528 dead transitions. [2024-06-21 16:26:45,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 528 transitions, 7514 flow [2024-06-21 16:26:45,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:26:45,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:26:45,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 16:26:45,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-21 16:26:45,391 INFO L175 Difference]: Start difference. First operand has 420 places, 514 transitions, 6197 flow. Second operand 8 states and 148 transitions. [2024-06-21 16:26:45,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 528 transitions, 7514 flow [2024-06-21 16:26:51,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 528 transitions, 7148 flow, removed 115 selfloop flow, removed 5 redundant places. [2024-06-21 16:26:51,365 INFO L231 Difference]: Finished difference. Result has 424 places, 516 transitions, 5990 flow [2024-06-21 16:26:51,365 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} [2024-06-21 16:26:51,365 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 380 predicate places. [2024-06-21 16:26:51,365 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 516 transitions, 5990 flow [2024-06-21 16:26:51,365 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) [2024-06-21 16:26:51,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:26:51,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:26:51,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-21 16:26:51,366 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)] === [2024-06-21 16:26:51,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:26:51,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1617638505, now seen corresponding path program 11 times [2024-06-21 16:26:51,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:26:51,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464712134] [2024-06-21 16:26:51,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:26:51,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:26:51,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:26:52,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:26:52,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:26:52,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464712134] [2024-06-21 16:26:52,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464712134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:26:52,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:26:52,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:26:52,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127695136] [2024-06-21 16:26:52,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:26:52,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:26:52,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:26:52,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:26:52,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:26:52,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:26:52,284 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) [2024-06-21 16:26:52,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:26:52,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:26:52,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:26:54,260 INFO L124 PetriNetUnfolderBase]: 4546/7621 cut-off events. [2024-06-21 16:26:54,260 INFO L125 PetriNetUnfolderBase]: For 2206158/2206158 co-relation queries the response was YES. [2024-06-21 16:26:54,362 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. [2024-06-21 16:26:54,397 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 454 selfloop transitions, 29 changer transitions 0/530 dead transitions. [2024-06-21 16:26:54,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 530 transitions, 7128 flow [2024-06-21 16:26:54,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:26:54,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:26:54,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 16:26:54,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-21 16:26:54,399 INFO L175 Difference]: Start difference. First operand has 424 places, 516 transitions, 5990 flow. Second operand 8 states and 145 transitions. [2024-06-21 16:26:54,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 530 transitions, 7128 flow [2024-06-21 16:27:00,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 530 transitions, 7020 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 16:27:00,778 INFO L231 Difference]: Finished difference. Result has 427 places, 519 transitions, 6098 flow [2024-06-21 16:27:00,779 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} [2024-06-21 16:27:00,779 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 383 predicate places. [2024-06-21 16:27:00,779 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 519 transitions, 6098 flow [2024-06-21 16:27:00,779 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) [2024-06-21 16:27:00,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:27:00,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:27:00,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-21 16:27:00,780 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)] === [2024-06-21 16:27:00,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:27:00,780 INFO L85 PathProgramCache]: Analyzing trace with hash -369392833, now seen corresponding path program 10 times [2024-06-21 16:27:00,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:27:00,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461967760] [2024-06-21 16:27:00,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:27:00,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:27:00,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:27:01,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:27:01,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:27:01,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461967760] [2024-06-21 16:27:01,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461967760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:27:01,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:27:01,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:27:01,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047554750] [2024-06-21 16:27:01,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:27:01,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:27:01,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:27:01,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:27:01,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:27:01,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:27:01,895 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) [2024-06-21 16:27:01,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:27:01,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:27:01,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:27:03,738 INFO L124 PetriNetUnfolderBase]: 4551/7634 cut-off events. [2024-06-21 16:27:03,738 INFO L125 PetriNetUnfolderBase]: For 2234489/2234497 co-relation queries the response was YES. [2024-06-21 16:27:03,840 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. [2024-06-21 16:27:03,879 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 439 selfloop transitions, 47 changer transitions 0/533 dead transitions. [2024-06-21 16:27:03,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 533 transitions, 7187 flow [2024-06-21 16:27:03,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:27:03,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:27:03,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 16:27:03,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-21 16:27:03,881 INFO L175 Difference]: Start difference. First operand has 427 places, 519 transitions, 6098 flow. Second operand 8 states and 146 transitions. [2024-06-21 16:27:03,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 533 transitions, 7187 flow [2024-06-21 16:27:10,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 533 transitions, 6999 flow, removed 67 selfloop flow, removed 6 redundant places. [2024-06-21 16:27:10,272 INFO L231 Difference]: Finished difference. Result has 429 places, 522 transitions, 6107 flow [2024-06-21 16:27:10,272 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} [2024-06-21 16:27:10,272 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 385 predicate places. [2024-06-21 16:27:10,273 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 522 transitions, 6107 flow [2024-06-21 16:27:10,273 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) [2024-06-21 16:27:10,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:27:10,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:27:10,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-21 16:27:10,273 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)] === [2024-06-21 16:27:10,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:27:10,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1794890181, now seen corresponding path program 11 times [2024-06-21 16:27:10,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:27:10,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622660587] [2024-06-21 16:27:10,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:27:10,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:27:10,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:27:11,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:27:11,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:27:11,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622660587] [2024-06-21 16:27:11,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622660587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:27:11,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:27:11,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:27:11,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282478229] [2024-06-21 16:27:11,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:27:11,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:27:11,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:27:11,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:27:11,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:27:11,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:27:11,166 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) [2024-06-21 16:27:11,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:27:11,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:27:11,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:27:13,124 INFO L124 PetriNetUnfolderBase]: 4761/7907 cut-off events. [2024-06-21 16:27:13,124 INFO L125 PetriNetUnfolderBase]: For 2266535/2266543 co-relation queries the response was YES. [2024-06-21 16:27:13,220 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. [2024-06-21 16:27:13,252 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 444 selfloop transitions, 88 changer transitions 0/537 dead transitions. [2024-06-21 16:27:13,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 537 transitions, 7627 flow [2024-06-21 16:27:13,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:27:13,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:27:13,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 16:27:13,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-21 16:27:13,253 INFO L175 Difference]: Start difference. First operand has 429 places, 522 transitions, 6107 flow. Second operand 8 states and 144 transitions. [2024-06-21 16:27:13,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 537 transitions, 7627 flow [2024-06-21 16:27:18,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 537 transitions, 7473 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-21 16:27:18,632 INFO L231 Difference]: Finished difference. Result has 431 places, 525 transitions, 6259 flow [2024-06-21 16:27:18,632 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} [2024-06-21 16:27:18,632 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 387 predicate places. [2024-06-21 16:27:18,632 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 525 transitions, 6259 flow [2024-06-21 16:27:18,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:18,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:27:18,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:27:18,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-21 16:27:18,633 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)] === [2024-06-21 16:27:18,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:27:18,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1830663407, now seen corresponding path program 11 times [2024-06-21 16:27:18,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:27:18,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078075835] [2024-06-21 16:27:18,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:27:18,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:27:18,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:27:19,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:27:19,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:27:19,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078075835] [2024-06-21 16:27:19,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078075835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:27:19,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:27:19,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:27:19,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927527917] [2024-06-21 16:27:19,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:27:19,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:27:19,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:27:19,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:27:19,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:27:19,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:27:19,579 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) [2024-06-21 16:27:19,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:27:19,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:27:19,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:27:21,463 INFO L124 PetriNetUnfolderBase]: 4553/7637 cut-off events. [2024-06-21 16:27:21,463 INFO L125 PetriNetUnfolderBase]: For 2278725/2278733 co-relation queries the response was YES. [2024-06-21 16:27:21,559 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. [2024-06-21 16:27:21,595 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 433 selfloop transitions, 58 changer transitions 0/539 dead transitions. [2024-06-21 16:27:21,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 539 transitions, 7637 flow [2024-06-21 16:27:21,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:27:21,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:27:21,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 16:27:21,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-21 16:27:21,596 INFO L175 Difference]: Start difference. First operand has 431 places, 525 transitions, 6259 flow. Second operand 8 states and 148 transitions. [2024-06-21 16:27:21,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 539 transitions, 7637 flow [2024-06-21 16:27:28,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 539 transitions, 7295 flow, removed 94 selfloop flow, removed 5 redundant places. [2024-06-21 16:27:28,823 INFO L231 Difference]: Finished difference. Result has 435 places, 527 transitions, 6121 flow [2024-06-21 16:27:28,823 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} [2024-06-21 16:27:28,824 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 391 predicate places. [2024-06-21 16:27:28,824 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 527 transitions, 6121 flow [2024-06-21 16:27:28,824 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) [2024-06-21 16:27:28,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:27:28,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:27:28,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-21 16:27:28,824 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)] === [2024-06-21 16:27:28,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:27:28,825 INFO L85 PathProgramCache]: Analyzing trace with hash -546524787, now seen corresponding path program 12 times [2024-06-21 16:27:28,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:27:28,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665833004] [2024-06-21 16:27:28,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:27:28,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:27:28,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:27:29,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:27:29,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:27:29,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665833004] [2024-06-21 16:27:29,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665833004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:27:29,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:27:29,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:27:29,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035842379] [2024-06-21 16:27:29,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:27:29,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:27:29,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:27:29,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:27:29,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:27:29,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:27:29,715 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) [2024-06-21 16:27:29,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:27:29,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:27:29,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:27:31,566 INFO L124 PetriNetUnfolderBase]: 4552/7635 cut-off events. [2024-06-21 16:27:31,566 INFO L125 PetriNetUnfolderBase]: For 2293410/2293413 co-relation queries the response was YES. [2024-06-21 16:27:31,667 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. [2024-06-21 16:27:31,704 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 402 selfloop transitions, 88 changer transitions 0/538 dead transitions. [2024-06-21 16:27:31,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 538 transitions, 7127 flow [2024-06-21 16:27:31,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:27:31,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:27:31,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 16:27:31,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-21 16:27:31,705 INFO L175 Difference]: Start difference. First operand has 435 places, 527 transitions, 6121 flow. Second operand 8 states and 150 transitions. [2024-06-21 16:27:31,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 538 transitions, 7127 flow [2024-06-21 16:27:38,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 538 transitions, 6909 flow, removed 61 selfloop flow, removed 5 redundant places. [2024-06-21 16:27:38,879 INFO L231 Difference]: Finished difference. Result has 438 places, 527 transitions, 6085 flow [2024-06-21 16:27:38,880 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} [2024-06-21 16:27:38,880 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 394 predicate places. [2024-06-21 16:27:38,880 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 527 transitions, 6085 flow [2024-06-21 16:27:38,880 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) [2024-06-21 16:27:38,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:27:38,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:27:38,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-21 16:27:38,881 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)] === [2024-06-21 16:27:38,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:27:38,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1617758661, now seen corresponding path program 12 times [2024-06-21 16:27:38,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:27:38,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899753498] [2024-06-21 16:27:38,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:27:38,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:27:38,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:27:39,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:27:39,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:27:39,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899753498] [2024-06-21 16:27:39,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899753498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:27:39,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:27:39,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:27:39,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028006902] [2024-06-21 16:27:39,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:27:39,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:27:39,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:27:39,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:27:39,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:27:39,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:27:39,681 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) [2024-06-21 16:27:39,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:27:39,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:27:39,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:27:41,580 INFO L124 PetriNetUnfolderBase]: 4752/7895 cut-off events. [2024-06-21 16:27:41,580 INFO L125 PetriNetUnfolderBase]: For 2312258/2312266 co-relation queries the response was YES. [2024-06-21 16:27:41,687 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. [2024-06-21 16:27:41,724 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 443 selfloop transitions, 90 changer transitions 0/538 dead transitions. [2024-06-21 16:27:41,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 538 transitions, 7177 flow [2024-06-21 16:27:41,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:27:41,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:27:41,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 16:27:41,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-21 16:27:41,726 INFO L175 Difference]: Start difference. First operand has 438 places, 527 transitions, 6085 flow. Second operand 8 states and 142 transitions. [2024-06-21 16:27:41,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 538 transitions, 7177 flow [2024-06-21 16:27:49,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 538 transitions, 6791 flow, removed 69 selfloop flow, removed 8 redundant places. [2024-06-21 16:27:49,017 INFO L231 Difference]: Finished difference. Result has 438 places, 527 transitions, 5885 flow [2024-06-21 16:27:49,017 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} [2024-06-21 16:27:49,017 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 394 predicate places. [2024-06-21 16:27:49,017 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 527 transitions, 5885 flow [2024-06-21 16:27:49,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:49,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:27:49,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:27:49,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-21 16:27:49,018 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)] === [2024-06-21 16:27:49,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:27:49,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1978102943, now seen corresponding path program 12 times [2024-06-21 16:27:49,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:27:49,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763482597] [2024-06-21 16:27:49,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:27:49,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:27:49,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:27:49,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:27:49,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:27:49,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763482597] [2024-06-21 16:27:49,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763482597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:27:49,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:27:49,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:27:49,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996199511] [2024-06-21 16:27:49,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:27:49,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:27:49,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:27:49,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:27:49,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:27:49,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:27:49,985 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) [2024-06-21 16:27:49,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:27:49,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:27:49,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:27:51,811 INFO L124 PetriNetUnfolderBase]: 4546/7629 cut-off events. [2024-06-21 16:27:51,812 INFO L125 PetriNetUnfolderBase]: For 2322825/2322833 co-relation queries the response was YES. [2024-06-21 16:27:51,914 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. [2024-06-21 16:27:51,951 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 443 selfloop transitions, 47 changer transitions 0/538 dead transitions. [2024-06-21 16:27:51,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 538 transitions, 6891 flow [2024-06-21 16:27:51,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:27:51,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:27:51,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 16:27:51,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-21 16:27:51,952 INFO L175 Difference]: Start difference. First operand has 438 places, 527 transitions, 5885 flow. Second operand 8 states and 146 transitions. [2024-06-21 16:27:51,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 538 transitions, 6891 flow [2024-06-21 16:27:58,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 538 transitions, 6543 flow, removed 49 selfloop flow, removed 9 redundant places. [2024-06-21 16:27:58,158 INFO L231 Difference]: Finished difference. Result has 437 places, 527 transitions, 5637 flow [2024-06-21 16:27:58,158 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} [2024-06-21 16:27:58,159 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 393 predicate places. [2024-06-21 16:27:58,159 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 527 transitions, 5637 flow [2024-06-21 16:27:58,159 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) [2024-06-21 16:27:58,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:27:58,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:27:58,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-21 16:27:58,159 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)] === [2024-06-21 16:27:58,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:27:58,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1963928131, now seen corresponding path program 1 times [2024-06-21 16:27:58,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:27:58,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436454696] [2024-06-21 16:27:58,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:27:58,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:27:58,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:27:59,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:27:59,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:27:59,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436454696] [2024-06-21 16:27:59,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436454696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:27:59,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:27:59,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:27:59,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514721348] [2024-06-21 16:27:59,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:27:59,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:27:59,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:27:59,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:27:59,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:27:59,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 16:27:59,927 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) [2024-06-21 16:27:59,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:27:59,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 16:27:59,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:01,855 INFO L124 PetriNetUnfolderBase]: 4330/7358 cut-off events. [2024-06-21 16:28:01,855 INFO L125 PetriNetUnfolderBase]: For 2351574/2351596 co-relation queries the response was YES. [2024-06-21 16:28:01,946 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. [2024-06-21 16:28:01,978 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 417 selfloop transitions, 20 changer transitions 0/542 dead transitions. [2024-06-21 16:28:01,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 542 transitions, 6603 flow [2024-06-21 16:28:01,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:28:01,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:28:01,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 16:28:01,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-21 16:28:01,979 INFO L175 Difference]: Start difference. First operand has 437 places, 527 transitions, 5637 flow. Second operand 9 states and 164 transitions. [2024-06-21 16:28:01,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 542 transitions, 6603 flow [2024-06-21 16:28:08,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 542 transitions, 6507 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 16:28:08,364 INFO L231 Difference]: Finished difference. Result has 440 places, 530 transitions, 5657 flow [2024-06-21 16:28:08,364 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} [2024-06-21 16:28:08,364 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 396 predicate places. [2024-06-21 16:28:08,364 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 530 transitions, 5657 flow [2024-06-21 16:28:08,365 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) [2024-06-21 16:28:08,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:08,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:08,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-21 16:28:08,365 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)] === [2024-06-21 16:28:08,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:08,365 INFO L85 PathProgramCache]: Analyzing trace with hash 2075239611, now seen corresponding path program 2 times [2024-06-21 16:28:08,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:08,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180938665] [2024-06-21 16:28:08,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:08,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:08,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:09,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:28:09,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:09,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180938665] [2024-06-21 16:28:09,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180938665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:09,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:09,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:28:09,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869897742] [2024-06-21 16:28:09,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:09,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:28:09,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:09,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:28:09,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:28:09,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-21 16:28:09,857 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) [2024-06-21 16:28:09,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:09,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-21 16:28:09,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:11,818 INFO L124 PetriNetUnfolderBase]: 4324/7350 cut-off events. [2024-06-21 16:28:11,818 INFO L125 PetriNetUnfolderBase]: For 2355494/2355502 co-relation queries the response was YES. [2024-06-21 16:28:11,915 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. [2024-06-21 16:28:11,950 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 412 selfloop transitions, 26 changer transitions 0/543 dead transitions. [2024-06-21 16:28:11,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 543 transitions, 6563 flow [2024-06-21 16:28:11,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:28:11,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:28:11,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-21 16:28:11,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-21 16:28:11,951 INFO L175 Difference]: Start difference. First operand has 440 places, 530 transitions, 5657 flow. Second operand 10 states and 180 transitions. [2024-06-21 16:28:11,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 543 transitions, 6563 flow [2024-06-21 16:28:19,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 543 transitions, 6431 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-21 16:28:19,330 INFO L231 Difference]: Finished difference. Result has 443 places, 530 transitions, 5587 flow [2024-06-21 16:28:19,330 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} [2024-06-21 16:28:19,330 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 399 predicate places. [2024-06-21 16:28:19,330 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 530 transitions, 5587 flow [2024-06-21 16:28:19,331 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) [2024-06-21 16:28:19,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:19,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:19,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-21 16:28:19,331 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)] === [2024-06-21 16:28:19,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:19,332 INFO L85 PathProgramCache]: Analyzing trace with hash -2008336799, now seen corresponding path program 1 times [2024-06-21 16:28:19,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:19,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928891889] [2024-06-21 16:28:19,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:19,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:19,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:20,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:28:20,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:20,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928891889] [2024-06-21 16:28:20,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928891889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:20,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:20,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:28:20,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793987565] [2024-06-21 16:28:20,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:20,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:28:20,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:20,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:28:20,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:28:20,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:28:20,334 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) [2024-06-21 16:28:20,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:20,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:28:20,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:22,496 INFO L124 PetriNetUnfolderBase]: 4631/7772 cut-off events. [2024-06-21 16:28:22,496 INFO L125 PetriNetUnfolderBase]: For 2371308/2371308 co-relation queries the response was YES. [2024-06-21 16:28:22,590 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. [2024-06-21 16:28:22,626 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 509 selfloop transitions, 20 changer transitions 0/557 dead transitions. [2024-06-21 16:28:22,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 557 transitions, 6831 flow [2024-06-21 16:28:22,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:28:22,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:28:22,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 16:28:22,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-21 16:28:22,628 INFO L175 Difference]: Start difference. First operand has 443 places, 530 transitions, 5587 flow. Second operand 9 states and 168 transitions. [2024-06-21 16:28:22,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 557 transitions, 6831 flow [2024-06-21 16:28:30,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 557 transitions, 6751 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-21 16:28:30,465 INFO L231 Difference]: Finished difference. Result has 442 places, 533 transitions, 5685 flow [2024-06-21 16:28:30,466 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} [2024-06-21 16:28:30,466 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 398 predicate places. [2024-06-21 16:28:30,466 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 533 transitions, 5685 flow [2024-06-21 16:28:30,466 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) [2024-06-21 16:28:30,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:30,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:30,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-21 16:28:30,467 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)] === [2024-06-21 16:28:30,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:30,467 INFO L85 PathProgramCache]: Analyzing trace with hash 262842875, now seen corresponding path program 1 times [2024-06-21 16:28:30,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:30,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263384097] [2024-06-21 16:28:30,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:30,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:30,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:31,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:28:31,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:31,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263384097] [2024-06-21 16:28:31,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263384097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:31,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:31,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:28:31,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028054039] [2024-06-21 16:28:31,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:31,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:28:31,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:31,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:28:31,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:28:31,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:28:31,493 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) [2024-06-21 16:28:31,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:31,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:28:31,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:33,560 INFO L124 PetriNetUnfolderBase]: 4655/7804 cut-off events. [2024-06-21 16:28:33,560 INFO L125 PetriNetUnfolderBase]: For 2456754/2456755 co-relation queries the response was YES. [2024-06-21 16:28:33,666 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. [2024-06-21 16:28:33,707 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 511 selfloop transitions, 21 changer transitions 0/560 dead transitions. [2024-06-21 16:28:33,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 560 transitions, 6919 flow [2024-06-21 16:28:33,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:28:33,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:28:33,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 16:28:33,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-21 16:28:33,708 INFO L175 Difference]: Start difference. First operand has 442 places, 533 transitions, 5685 flow. Second operand 9 states and 168 transitions. [2024-06-21 16:28:33,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 560 transitions, 6919 flow [2024-06-21 16:28:41,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 560 transitions, 6763 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-06-21 16:28:41,571 INFO L231 Difference]: Finished difference. Result has 444 places, 537 transitions, 5682 flow [2024-06-21 16:28:41,571 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} [2024-06-21 16:28:41,571 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 400 predicate places. [2024-06-21 16:28:41,571 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 537 transitions, 5682 flow [2024-06-21 16:28:41,571 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) [2024-06-21 16:28:41,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:41,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:41,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-21 16:28:41,572 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)] === [2024-06-21 16:28:41,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:41,572 INFO L85 PathProgramCache]: Analyzing trace with hash -2003568503, now seen corresponding path program 2 times [2024-06-21 16:28:41,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:41,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683763278] [2024-06-21 16:28:41,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:41,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:41,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:42,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:28:42,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:42,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683763278] [2024-06-21 16:28:42,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683763278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:42,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:42,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:28:42,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568648806] [2024-06-21 16:28:42,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:42,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:28:42,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:42,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:28:42,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:28:42,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:28:42,741 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) [2024-06-21 16:28:42,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:42,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:28:42,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:44,969 INFO L124 PetriNetUnfolderBase]: 4702/7873 cut-off events. [2024-06-21 16:28:44,970 INFO L125 PetriNetUnfolderBase]: For 2519476/2519477 co-relation queries the response was YES. [2024-06-21 16:28:45,064 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. [2024-06-21 16:28:45,100 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 503 selfloop transitions, 35 changer transitions 0/566 dead transitions. [2024-06-21 16:28:45,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 566 transitions, 7344 flow [2024-06-21 16:28:45,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:28:45,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:28:45,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 16:28:45,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-21 16:28:45,101 INFO L175 Difference]: Start difference. First operand has 444 places, 537 transitions, 5682 flow. Second operand 9 states and 170 transitions. [2024-06-21 16:28:45,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 566 transitions, 7344 flow [2024-06-21 16:28:53,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 566 transitions, 7223 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-21 16:28:53,368 INFO L231 Difference]: Finished difference. Result has 447 places, 544 transitions, 5847 flow [2024-06-21 16:28:53,368 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} [2024-06-21 16:28:53,369 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 403 predicate places. [2024-06-21 16:28:53,369 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 544 transitions, 5847 flow [2024-06-21 16:28:53,369 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) [2024-06-21 16:28:53,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:53,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:53,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-21 16:28:53,369 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)] === [2024-06-21 16:28:53,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:53,370 INFO L85 PathProgramCache]: Analyzing trace with hash -2003575013, now seen corresponding path program 3 times [2024-06-21 16:28:53,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:53,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580315942] [2024-06-21 16:28:53,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:53,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:53,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:54,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:28:54,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:54,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580315942] [2024-06-21 16:28:54,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580315942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:54,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:54,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:28:54,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40215818] [2024-06-21 16:28:54,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:54,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:28:54,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:54,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:28:54,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:28:54,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:28:54,412 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) [2024-06-21 16:28:54,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:54,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:28:54,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:56,423 INFO L124 PetriNetUnfolderBase]: 4684/7849 cut-off events. [2024-06-21 16:28:56,423 INFO L125 PetriNetUnfolderBase]: For 2530386/2530388 co-relation queries the response was YES. [2024-06-21 16:28:56,529 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. [2024-06-21 16:28:56,566 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 511 selfloop transitions, 26 changer transitions 0/565 dead transitions. [2024-06-21 16:28:56,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 565 transitions, 7011 flow [2024-06-21 16:28:56,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:28:56,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:28:56,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 16:28:56,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-21 16:28:56,567 INFO L175 Difference]: Start difference. First operand has 447 places, 544 transitions, 5847 flow. Second operand 9 states and 168 transitions. [2024-06-21 16:28:56,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 565 transitions, 7011 flow [2024-06-21 16:29:05,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 565 transitions, 6837 flow, removed 74 selfloop flow, removed 5 redundant places. [2024-06-21 16:29:05,423 INFO L231 Difference]: Finished difference. Result has 451 places, 544 transitions, 5732 flow [2024-06-21 16:29:05,423 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} [2024-06-21 16:29:05,423 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 407 predicate places. [2024-06-21 16:29:05,424 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 544 transitions, 5732 flow [2024-06-21 16:29:05,424 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) [2024-06-21 16:29:05,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:29:05,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:29:05,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-21 16:29:05,424 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)] === [2024-06-21 16:29:05,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:29:05,425 INFO L85 PathProgramCache]: Analyzing trace with hash 977352489, now seen corresponding path program 1 times [2024-06-21 16:29:05,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:29:05,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408305131] [2024-06-21 16:29:05,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:29:05,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:29:05,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:29:06,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:29:06,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:29:06,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408305131] [2024-06-21 16:29:06,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408305131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:29:06,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:29:06,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:29:06,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938092698] [2024-06-21 16:29:06,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:29:06,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:29:06,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:29:06,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:29:06,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:29:06,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:29:06,991 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) [2024-06-21 16:29:06,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:29:06,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:29:06,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:29:09,166 INFO L124 PetriNetUnfolderBase]: 4607/7708 cut-off events. [2024-06-21 16:29:09,167 INFO L125 PetriNetUnfolderBase]: For 2481799/2481815 co-relation queries the response was YES. [2024-06-21 16:29:09,266 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. [2024-06-21 16:29:09,300 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 491 selfloop transitions, 20 changer transitions 0/559 dead transitions. [2024-06-21 16:29:09,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 559 transitions, 6790 flow [2024-06-21 16:29:09,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:29:09,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:29:09,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 16:29:09,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-21 16:29:09,302 INFO L175 Difference]: Start difference. First operand has 451 places, 544 transitions, 5732 flow. Second operand 9 states and 159 transitions. [2024-06-21 16:29:09,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 559 transitions, 6790 flow [2024-06-21 16:29:16,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 559 transitions, 6713 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-21 16:29:16,382 INFO L231 Difference]: Finished difference. Result has 452 places, 544 transitions, 5701 flow [2024-06-21 16:29:16,383 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} [2024-06-21 16:29:16,384 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 408 predicate places. [2024-06-21 16:29:16,385 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 544 transitions, 5701 flow [2024-06-21 16:29:16,385 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) [2024-06-21 16:29:16,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:29:16,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:29:16,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-21 16:29:16,385 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)] === [2024-06-21 16:29:16,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:29:16,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1830847973, now seen corresponding path program 4 times [2024-06-21 16:29:16,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:29:16,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714731233] [2024-06-21 16:29:16,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:29:16,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:29:16,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:29:17,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:29:17,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:29:17,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714731233] [2024-06-21 16:29:17,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714731233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:29:17,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:29:17,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:29:17,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790682503] [2024-06-21 16:29:17,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:29:17,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:29:17,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:29:17,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:29:17,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:29:17,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:29:17,498 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) [2024-06-21 16:29:17,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:29:17,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:29:17,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:29:19,859 INFO L124 PetriNetUnfolderBase]: 4723/7908 cut-off events. [2024-06-21 16:29:19,859 INFO L125 PetriNetUnfolderBase]: For 2627349/2627355 co-relation queries the response was YES. [2024-06-21 16:29:19,962 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. [2024-06-21 16:29:20,062 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 483 selfloop transitions, 60 changer transitions 0/571 dead transitions. [2024-06-21 16:29:20,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 571 transitions, 7403 flow [2024-06-21 16:29:20,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:29:20,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:29:20,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 16:29:20,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 16:29:20,065 INFO L175 Difference]: Start difference. First operand has 452 places, 544 transitions, 5701 flow. Second operand 9 states and 171 transitions. [2024-06-21 16:29:20,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 571 transitions, 7403 flow [2024-06-21 16:29:26,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 571 transitions, 7283 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-21 16:29:26,404 INFO L231 Difference]: Finished difference. Result has 454 places, 551 transitions, 5954 flow [2024-06-21 16:29:26,404 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} [2024-06-21 16:29:26,404 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 410 predicate places. [2024-06-21 16:29:26,404 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 551 transitions, 5954 flow [2024-06-21 16:29:26,405 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) [2024-06-21 16:29:26,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:29:26,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:29:26,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-21 16:29:26,405 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)] === [2024-06-21 16:29:26,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:29:26,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1861412069, now seen corresponding path program 5 times [2024-06-21 16:29:26,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:29:26,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839887968] [2024-06-21 16:29:26,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:29:26,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:29:26,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:29:27,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:29:27,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:29:27,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839887968] [2024-06-21 16:29:27,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839887968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:29:27,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:29:27,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:29:27,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806280051] [2024-06-21 16:29:27,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:29:27,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:29:27,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:29:27,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:29:27,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:29:27,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:29:27,487 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) [2024-06-21 16:29:27,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:29:27,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:29:27,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:29:30,145 INFO L124 PetriNetUnfolderBase]: 4730/7918 cut-off events. [2024-06-21 16:29:30,145 INFO L125 PetriNetUnfolderBase]: For 2671658/2671664 co-relation queries the response was YES. [2024-06-21 16:29:30,250 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. [2024-06-21 16:29:30,282 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 511 selfloop transitions, 33 changer transitions 0/572 dead transitions. [2024-06-21 16:29:30,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 572 transitions, 7231 flow [2024-06-21 16:29:30,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:29:30,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:29:30,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 16:29:30,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-21 16:29:30,284 INFO L175 Difference]: Start difference. First operand has 454 places, 551 transitions, 5954 flow. Second operand 9 states and 167 transitions. [2024-06-21 16:29:30,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 572 transitions, 7231 flow [2024-06-21 16:29:37,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 572 transitions, 7081 flow, removed 56 selfloop flow, removed 5 redundant places. [2024-06-21 16:29:37,197 INFO L231 Difference]: Finished difference. Result has 458 places, 554 transitions, 5982 flow [2024-06-21 16:29:37,197 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} [2024-06-21 16:29:37,198 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 414 predicate places. [2024-06-21 16:29:37,198 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 554 transitions, 5982 flow [2024-06-21 16:29:37,198 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) [2024-06-21 16:29:37,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:29:37,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:29:37,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-21 16:29:37,199 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)] === [2024-06-21 16:29:37,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:29:37,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1831078613, now seen corresponding path program 6 times [2024-06-21 16:29:37,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:29:37,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716663635] [2024-06-21 16:29:37,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:29:37,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:29:37,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:29:38,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:29:38,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:29:38,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716663635] [2024-06-21 16:29:38,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716663635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:29:38,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:29:38,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:29:38,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860423973] [2024-06-21 16:29:38,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:29:38,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:29:38,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:29:38,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:29:38,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:29:38,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:29:38,462 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) [2024-06-21 16:29:38,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:29:38,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:29:38,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:29:41,159 INFO L124 PetriNetUnfolderBase]: 4726/7912 cut-off events. [2024-06-21 16:29:41,159 INFO L125 PetriNetUnfolderBase]: For 2617861/2617867 co-relation queries the response was YES. [2024-06-21 16:29:41,270 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. [2024-06-21 16:29:41,310 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 512 selfloop transitions, 38 changer transitions 0/578 dead transitions. [2024-06-21 16:29:41,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 578 transitions, 7350 flow [2024-06-21 16:29:41,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:29:41,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:29:41,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 16:29:41,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-21 16:29:41,312 INFO L175 Difference]: Start difference. First operand has 458 places, 554 transitions, 5982 flow. Second operand 9 states and 168 transitions. [2024-06-21 16:29:41,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 578 transitions, 7350 flow [2024-06-21 16:29:49,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 578 transitions, 7122 flow, removed 82 selfloop flow, removed 7 redundant places. [2024-06-21 16:29:49,231 INFO L231 Difference]: Finished difference. Result has 461 places, 561 transitions, 6049 flow [2024-06-21 16:29:49,231 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} [2024-06-21 16:29:49,231 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 417 predicate places. [2024-06-21 16:29:49,231 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 561 transitions, 6049 flow [2024-06-21 16:29:49,231 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) [2024-06-21 16:29:49,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:29:49,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:29:49,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-21 16:29:49,232 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)] === [2024-06-21 16:29:49,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:29:49,232 INFO L85 PathProgramCache]: Analyzing trace with hash 107951481, now seen corresponding path program 7 times [2024-06-21 16:29:49,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:29:49,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710289037] [2024-06-21 16:29:49,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:29:49,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:29:49,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:29:50,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:29:50,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:29:50,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710289037] [2024-06-21 16:29:50,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710289037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:29:50,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:29:50,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:29:50,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043047610] [2024-06-21 16:29:50,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:29:50,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:29:50,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:29:50,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:29:50,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:29:50,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:29:50,434 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) [2024-06-21 16:29:50,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:29:50,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:29:50,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:29:52,872 INFO L124 PetriNetUnfolderBase]: 4775/7986 cut-off events. [2024-06-21 16:29:52,872 INFO L125 PetriNetUnfolderBase]: For 2725788/2725795 co-relation queries the response was YES. [2024-06-21 16:29:52,978 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. [2024-06-21 16:29:53,013 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 503 selfloop transitions, 55 changer transitions 0/586 dead transitions. [2024-06-21 16:29:53,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 586 transitions, 7811 flow [2024-06-21 16:29:53,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:29:53,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:29:53,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 16:29:53,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-21 16:29:53,014 INFO L175 Difference]: Start difference. First operand has 461 places, 561 transitions, 6049 flow. Second operand 9 states and 173 transitions. [2024-06-21 16:29:53,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 586 transitions, 7811 flow [2024-06-21 16:30:00,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 586 transitions, 7701 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-21 16:30:00,104 INFO L231 Difference]: Finished difference. Result has 466 places, 568 transitions, 6289 flow [2024-06-21 16:30:00,104 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} [2024-06-21 16:30:00,106 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 422 predicate places. [2024-06-21 16:30:00,106 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 568 transitions, 6289 flow [2024-06-21 16:30:00,106 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) [2024-06-21 16:30:00,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:30:00,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:30:00,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-21 16:30:00,107 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)] === [2024-06-21 16:30:00,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:30:00,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1795382523, now seen corresponding path program 2 times [2024-06-21 16:30:00,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:30:00,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757521552] [2024-06-21 16:30:00,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:30:00,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:30:00,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:30:01,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:30:01,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:30:01,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757521552] [2024-06-21 16:30:01,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757521552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:30:01,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:30:01,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:30:01,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363223764] [2024-06-21 16:30:01,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:30:01,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:30:01,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:30:01,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:30:01,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:30:01,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:30:01,905 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) [2024-06-21 16:30:01,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:30:01,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:30:01,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:30:04,428 INFO L124 PetriNetUnfolderBase]: 4718/7863 cut-off events. [2024-06-21 16:30:04,428 INFO L125 PetriNetUnfolderBase]: For 2734762/2734785 co-relation queries the response was YES. [2024-06-21 16:30:04,538 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. [2024-06-21 16:30:04,574 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 507 selfloop transitions, 25 changer transitions 0/580 dead transitions. [2024-06-21 16:30:04,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 580 transitions, 7381 flow [2024-06-21 16:30:04,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:30:04,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:30:04,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-21 16:30:04,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082687338501292 [2024-06-21 16:30:04,575 INFO L175 Difference]: Start difference. First operand has 466 places, 568 transitions, 6289 flow. Second operand 9 states and 158 transitions. [2024-06-21 16:30:04,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 580 transitions, 7381 flow [2024-06-21 16:30:12,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 580 transitions, 7189 flow, removed 72 selfloop flow, removed 5 redundant places. [2024-06-21 16:30:12,631 INFO L231 Difference]: Finished difference. Result has 470 places, 568 transitions, 6153 flow [2024-06-21 16:30:12,631 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} [2024-06-21 16:30:12,631 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 426 predicate places. [2024-06-21 16:30:12,631 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 568 transitions, 6153 flow [2024-06-21 16:30:12,631 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) [2024-06-21 16:30:12,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:30:12,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:30:12,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-21 16:30:12,632 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)] === [2024-06-21 16:30:12,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:30:12,632 INFO L85 PathProgramCache]: Analyzing trace with hash -369146817, now seen corresponding path program 8 times [2024-06-21 16:30:12,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:30:12,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340017300] [2024-06-21 16:30:12,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:30:12,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:30:12,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:30:13,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:30:13,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:30:13,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340017300] [2024-06-21 16:30:13,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340017300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:30:13,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:30:13,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:30:13,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624626459] [2024-06-21 16:30:13,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:30:13,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:30:13,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:30:13,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:30:13,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:30:13,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:30:13,915 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) [2024-06-21 16:30:13,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:30:13,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:30:13,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:30:16,297 INFO L124 PetriNetUnfolderBase]: 4767/7976 cut-off events. [2024-06-21 16:30:16,297 INFO L125 PetriNetUnfolderBase]: For 2784739/2784746 co-relation queries the response was YES. [2024-06-21 16:30:16,407 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. [2024-06-21 16:30:16,585 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 516 selfloop transitions, 42 changer transitions 0/586 dead transitions. [2024-06-21 16:30:16,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 586 transitions, 7440 flow [2024-06-21 16:30:16,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:30:16,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:30:16,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 16:30:16,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-21 16:30:16,587 INFO L175 Difference]: Start difference. First operand has 470 places, 568 transitions, 6153 flow. Second operand 9 states and 166 transitions. [2024-06-21 16:30:16,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 586 transitions, 7440 flow [2024-06-21 16:30:26,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 586 transitions, 7312 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-21 16:30:26,460 INFO L231 Difference]: Finished difference. Result has 469 places, 571 transitions, 6205 flow [2024-06-21 16:30:26,460 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} [2024-06-21 16:30:26,461 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 425 predicate places. [2024-06-21 16:30:26,461 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 571 transitions, 6205 flow [2024-06-21 16:30:26,461 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) [2024-06-21 16:30:26,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:30:26,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:30:26,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-21 16:30:26,461 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)] === [2024-06-21 16:30:26,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:30:26,462 INFO L85 PathProgramCache]: Analyzing trace with hash 2080473465, now seen corresponding path program 9 times [2024-06-21 16:30:26,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:30:26,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796916827] [2024-06-21 16:30:26,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:30:26,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:30:26,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:30:27,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:30:27,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:30:27,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796916827] [2024-06-21 16:30:27,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796916827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:30:27,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:30:27,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:30:27,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592833773] [2024-06-21 16:30:27,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:30:27,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:30:27,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:30:27,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:30:27,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:30:27,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:30:27,925 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) [2024-06-21 16:30:27,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:30:27,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:30:27,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:30:30,482 INFO L124 PetriNetUnfolderBase]: 4761/7966 cut-off events. [2024-06-21 16:30:30,482 INFO L125 PetriNetUnfolderBase]: For 2732099/2732106 co-relation queries the response was YES. [2024-06-21 16:30:30,593 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. [2024-06-21 16:30:30,633 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 504 selfloop transitions, 88 changer transitions 0/620 dead transitions. [2024-06-21 16:30:30,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 620 transitions, 8295 flow [2024-06-21 16:30:30,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:30:30,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:30:30,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 16:30:30,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-21 16:30:30,634 INFO L175 Difference]: Start difference. First operand has 469 places, 571 transitions, 6205 flow. Second operand 9 states and 168 transitions. [2024-06-21 16:30:30,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 620 transitions, 8295 flow [2024-06-21 16:30:39,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 620 transitions, 8067 flow, removed 73 selfloop flow, removed 7 redundant places. [2024-06-21 16:30:39,965 INFO L231 Difference]: Finished difference. Result has 474 places, 602 transitions, 6759 flow [2024-06-21 16:30:39,965 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} [2024-06-21 16:30:39,965 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 430 predicate places. [2024-06-21 16:30:39,965 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 602 transitions, 6759 flow [2024-06-21 16:30:39,965 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) [2024-06-21 16:30:39,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:30:39,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:30:39,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-21 16:30:39,966 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)] === [2024-06-21 16:30:39,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:30:39,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1795142955, now seen corresponding path program 10 times [2024-06-21 16:30:39,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:30:39,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985766386] [2024-06-21 16:30:39,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:30:39,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:30:39,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:30:41,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:30:41,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:30:41,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985766386] [2024-06-21 16:30:41,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985766386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:30:41,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:30:41,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:30:41,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131427310] [2024-06-21 16:30:41,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:30:41,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:30:41,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:30:41,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:30:41,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:30:41,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:30:41,224 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) [2024-06-21 16:30:41,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:30:41,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:30:41,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:30:43,700 INFO L124 PetriNetUnfolderBase]: 4757/7960 cut-off events. [2024-06-21 16:30:43,700 INFO L125 PetriNetUnfolderBase]: For 2736247/2736254 co-relation queries the response was YES. [2024-06-21 16:30:43,806 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. [2024-06-21 16:30:43,840 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 545 selfloop transitions, 46 changer transitions 0/619 dead transitions. [2024-06-21 16:30:43,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 619 transitions, 8058 flow [2024-06-21 16:30:43,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:30:43,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:30:43,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 16:30:43,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-21 16:30:43,841 INFO L175 Difference]: Start difference. First operand has 474 places, 602 transitions, 6759 flow. Second operand 9 states and 167 transitions. [2024-06-21 16:30:43,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 619 transitions, 8058 flow [2024-06-21 16:30:52,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 619 transitions, 7868 flow, removed 75 selfloop flow, removed 3 redundant places. [2024-06-21 16:30:52,965 INFO L231 Difference]: Finished difference. Result has 481 places, 605 transitions, 6716 flow [2024-06-21 16:30:52,966 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} [2024-06-21 16:30:52,966 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 437 predicate places. [2024-06-21 16:30:52,966 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 605 transitions, 6716 flow [2024-06-21 16:30:52,966 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) [2024-06-21 16:30:52,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:30:52,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:30:52,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-21 16:30:52,967 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)] === [2024-06-21 16:30:52,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:30:52,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1073320135, now seen corresponding path program 1 times [2024-06-21 16:30:52,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:30:52,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619157632] [2024-06-21 16:30:52,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:30:52,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:30:52,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:30:53,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:30:53,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:30:53,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619157632] [2024-06-21 16:30:53,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619157632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:30:53,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:30:53,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:30:53,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762787965] [2024-06-21 16:30:53,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:30:53,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:30:53,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:30:53,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:30:53,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:30:53,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:30:53,983 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) [2024-06-21 16:30:53,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:30:53,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:30:53,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:30:56,381 INFO L124 PetriNetUnfolderBase]: 4719/7862 cut-off events. [2024-06-21 16:30:56,382 INFO L125 PetriNetUnfolderBase]: For 2771118/2771140 co-relation queries the response was YES. [2024-06-21 16:30:56,486 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. [2024-06-21 16:30:56,519 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 570 selfloop transitions, 17 changer transitions 0/637 dead transitions. [2024-06-21 16:30:56,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 637 transitions, 8012 flow [2024-06-21 16:30:56,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:30:56,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:30:56,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 16:30:56,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 16:30:56,520 INFO L175 Difference]: Start difference. First operand has 481 places, 605 transitions, 6716 flow. Second operand 9 states and 171 transitions. [2024-06-21 16:30:56,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 637 transitions, 8012 flow [2024-06-21 16:31:04,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 637 transitions, 7904 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-21 16:31:04,967 INFO L231 Difference]: Finished difference. Result has 485 places, 607 transitions, 6699 flow [2024-06-21 16:31:04,968 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} [2024-06-21 16:31:04,968 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 441 predicate places. [2024-06-21 16:31:04,968 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 607 transitions, 6699 flow [2024-06-21 16:31:04,968 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) [2024-06-21 16:31:04,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:31:04,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:31:04,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-21 16:31:04,969 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)] === [2024-06-21 16:31:04,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:31:04,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1518651843, now seen corresponding path program 2 times [2024-06-21 16:31:04,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:31:04,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574655555] [2024-06-21 16:31:04,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:31:04,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:31:04,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:31:05,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:31:05,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:31:05,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574655555] [2024-06-21 16:31:05,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574655555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:31:05,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:31:05,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:31:05,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414384753] [2024-06-21 16:31:05,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:31:05,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:31:05,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:31:05,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:31:05,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:31:05,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:31:05,966 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) [2024-06-21 16:31:05,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:31:05,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:31:05,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:31:08,404 INFO L124 PetriNetUnfolderBase]: 4727/7874 cut-off events. [2024-06-21 16:31:08,404 INFO L125 PetriNetUnfolderBase]: For 2798715/2798737 co-relation queries the response was YES. [2024-06-21 16:31:08,518 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. [2024-06-21 16:31:08,726 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 567 selfloop transitions, 18 changer transitions 0/635 dead transitions. [2024-06-21 16:31:08,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 635 transitions, 7985 flow [2024-06-21 16:31:08,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:31:08,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:31:08,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 16:31:08,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-21 16:31:08,727 INFO L175 Difference]: Start difference. First operand has 485 places, 607 transitions, 6699 flow. Second operand 9 states and 168 transitions. [2024-06-21 16:31:08,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 635 transitions, 7985 flow [2024-06-21 16:31:17,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 635 transitions, 7900 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-21 16:31:17,987 INFO L231 Difference]: Finished difference. Result has 487 places, 609 transitions, 6711 flow [2024-06-21 16:31:17,988 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} [2024-06-21 16:31:17,988 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 443 predicate places. [2024-06-21 16:31:17,988 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 609 transitions, 6711 flow [2024-06-21 16:31:17,988 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) [2024-06-21 16:31:17,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:31:17,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:31:17,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-21 16:31:17,989 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)] === [2024-06-21 16:31:17,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:31:17,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1671691241, now seen corresponding path program 3 times [2024-06-21 16:31:17,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:31:17,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580643401] [2024-06-21 16:31:17,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:31:17,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:31:17,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:31:19,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:31:19,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:31:19,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580643401] [2024-06-21 16:31:19,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580643401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:31:19,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:31:19,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:31:19,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177439917] [2024-06-21 16:31:19,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:31:19,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:31:19,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:31:19,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:31:19,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:31:19,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:31:19,240 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) [2024-06-21 16:31:19,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:31:19,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:31:19,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:31:21,909 INFO L124 PetriNetUnfolderBase]: 4740/7893 cut-off events. [2024-06-21 16:31:21,909 INFO L125 PetriNetUnfolderBase]: For 2827215/2827237 co-relation queries the response was YES. [2024-06-21 16:31:22,025 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. [2024-06-21 16:31:22,060 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 570 selfloop transitions, 19 changer transitions 0/639 dead transitions. [2024-06-21 16:31:22,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 639 transitions, 8030 flow [2024-06-21 16:31:22,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:31:22,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:31:22,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 16:31:22,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-21 16:31:22,062 INFO L175 Difference]: Start difference. First operand has 487 places, 609 transitions, 6711 flow. Second operand 9 states and 168 transitions. [2024-06-21 16:31:22,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 639 transitions, 8030 flow [2024-06-21 16:31:33,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 639 transitions, 7949 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-21 16:31:33,557 INFO L231 Difference]: Finished difference. Result has 490 places, 614 transitions, 6766 flow [2024-06-21 16:31:33,557 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} [2024-06-21 16:31:33,557 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 446 predicate places. [2024-06-21 16:31:33,557 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 614 transitions, 6766 flow [2024-06-21 16:31:33,557 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) [2024-06-21 16:31:33,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:31:33,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:31:33,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-21 16:31:33,558 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)] === [2024-06-21 16:31:33,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:31:33,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1435042449, now seen corresponding path program 1 times [2024-06-21 16:31:33,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:31:33,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895870151] [2024-06-21 16:31:33,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:31:33,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:31:33,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:31:34,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:31:34,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:31:34,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895870151] [2024-06-21 16:31:34,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895870151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:31:34,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:31:34,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:31:34,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921593697] [2024-06-21 16:31:34,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:31:34,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:31:34,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:31:34,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:31:34,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:31:34,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:31:34,503 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) [2024-06-21 16:31:34,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:31:34,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:31:34,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand